diff options
102 files changed, 7059 insertions, 3727 deletions
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS index 7cd00a0d6..816bdf290 100644 --- a/.github/CODEOWNERS +++ b/.github/CODEOWNERS @@ -1,6 +1,5 @@ # Extensions **/bot/exts/backend/sync/** @MarkKoz -**/bot/exts/filters/*token_remover.py @MarkKoz **/bot/exts/moderation/*silence.py @MarkKoz bot/exts/info/codeblock/** @MarkKoz bot/exts/utils/extensions.py @MarkKoz @@ -8,14 +7,11 @@ bot/exts/utils/snekbox.py @MarkKoz @jb3 bot/exts/moderation/** @mbaruh @Den4200 @ks129 @jb3 bot/exts/info/** @Den4200 @jb3 bot/exts/info/information.py @mbaruh @jb3 -bot/exts/filters/** @mbaruh @jb3 +bot/exts/filtering/** @mbaruh bot/exts/fun/** @ks129 bot/exts/utils/** @ks129 @jb3 bot/exts/recruitment/** @wookie184 -# Rules -bot/rules/** @mbaruh - # Utils bot/utils/function.py @MarkKoz bot/utils/lock.py @MarkKoz diff --git a/bot/bot.py b/bot/bot.py index 6164ba9fd..f56aec38e 100644 --- a/bot/bot.py +++ b/bot/bot.py @@ -1,5 +1,4 @@ import asyncio -from collections import defaultdict import aiohttp from pydis_core import BotBase @@ -27,8 +26,6 @@ class Bot(BotBase): super().__init__(*args, **kwargs) - self.filter_list_cache = defaultdict(dict) - async def ping_services(self) -> None: """A helper to make sure all the services the bot relies on are available on startup.""" # Connect Site/API @@ -45,33 +42,10 @@ class Bot(BotBase): raise await asyncio.sleep(constants.URLs.connect_cooldown) - def insert_item_into_filter_list_cache(self, item: dict[str, str]) -> None: - """Add an item to the bots filter_list_cache.""" - type_ = item["type"] - allowed = item["allowed"] - content = item["content"] - - self.filter_list_cache[f"{type_}.{allowed}"][content] = { - "id": item["id"], - "comment": item["comment"], - "created_at": item["created_at"], - "updated_at": item["updated_at"], - } - - async def cache_filter_list_data(self) -> None: - """Cache all the data in the FilterList on the site.""" - full_cache = await self.api_client.get('bot/filter-lists') - - for item in full_cache: - self.insert_item_into_filter_list_cache(item) - async def setup_hook(self) -> None: """Default async initialisation method for discord.py.""" await super().setup_hook() - # Build the FilterList cache - await self.cache_filter_list_data() - # This is not awaited to avoid a deadlock with any cogs that have # wait_until_guild_available in their cog_load method. scheduling.create_task(self.load_extensions(exts)) diff --git a/bot/constants.py b/bot/constants.py index 4186472b1..1e6227a94 100644 --- a/bot/constants.py +++ b/bot/constants.py @@ -333,43 +333,6 @@ class _Free(EnvConfig): Free = _Free() -class Rule(BaseModel): - interval: int - max: int - - -# Some help in choosing an appropriate name for this is appreciated -class ExtendedRule(Rule): - max_consecutive: int - - -class Rules(BaseModel): - attachments: Rule = Rule(interval=10, max=6) - burst: Rule = Rule(interval=10, max=7) - chars: Rule = Rule(interval=5, max=4_200) - discord_emojis: Rule = Rule(interval=10, max=20) - duplicates: Rule = Rule(interval=10, max=3) - links: Rule = Rule(interval=10, max=10) - mentions: Rule = Rule(interval=10, max=5) - newlines: ExtendedRule = ExtendedRule(interval=10, max=100, max_consecutive=10) - role_mentions: Rule = Rule(interval=10, max=3) - - -class _AntiSpam(EnvConfig): - EnvConfig.Config.env_prefix = 'anti_spam_' - - cache_size = 100 - - clean_offending = True - ping_everyone = True - - remove_timeout_after = 600 - rules = Rules() - - -AntiSpam = _AntiSpam() - - class _HelpChannels(EnvConfig): EnvConfig.Config.env_prefix = "help_channels_" @@ -662,47 +625,6 @@ class _Icons(EnvConfig): Icons = _Icons() -class _Filter(EnvConfig): - EnvConfig.Config.env_prefix = "filters_" - - filter_domains = True - filter_everyone_ping = True - filter_invites = True - filter_zalgo = False - watch_regex = True - watch_rich_embeds = True - - # Notifications are not expected for "watchlist" type filters - - notify_user_domains = False - notify_user_everyone_ping = True - notify_user_invites = True - notify_user_zalgo = False - - offensive_msg_delete_days = 7 - ping_everyone = True - - channel_whitelist = [ - Channels.admins, - Channels.big_brother, - Channels.dev_log, - Channels.message_log, - Channels.mod_log, - Channels.staff_lounge - ] - role_whitelist = [ - Roles.admins, - Roles.helpers, - Roles.moderators, - Roles.owners, - Roles.python_community, - Roles.partners - ] - - -Filter = _Filter() - - class _Keys(EnvConfig): EnvConfig.Config.env_prefix = "api_keys_" diff --git a/bot/converters.py b/bot/converters.py index 544513c90..21623b597 100644 --- a/bot/converters.py +++ b/bot/converters.py @@ -9,7 +9,7 @@ import dateutil.parser import discord from aiohttp import ClientConnectorError from dateutil.relativedelta import relativedelta -from discord.ext.commands import BadArgument, Bot, Context, Converter, IDConverter, MemberConverter, UserConverter +from discord.ext.commands import BadArgument, Context, Converter, IDConverter, MemberConverter, UserConverter from discord.utils import escape_markdown, snowflake_time from pydis_core.site_api import ResponseCodeError from pydis_core.utils import unqualify @@ -68,54 +68,6 @@ class ValidDiscordServerInvite(Converter): raise BadArgument("This does not appear to be a valid Discord server invite.") -class ValidFilterListType(Converter): - """ - A converter that checks whether the given string is a valid FilterList type. - - Raises `BadArgument` if the argument is not a valid FilterList type, and simply - passes through the given argument otherwise. - """ - - @staticmethod - async def get_valid_types(bot: Bot) -> list: - """ - Try to get a list of valid filter list types. - - Raise a BadArgument if the API can't respond. - """ - try: - valid_types = await bot.api_client.get('bot/filter-lists/get-types') - except ResponseCodeError: - raise BadArgument("Cannot validate list_type: Unable to fetch valid types from API.") - - return [enum for enum, classname in valid_types] - - async def convert(self, ctx: Context, list_type: str) -> str: - """Checks whether the given string is a valid FilterList type.""" - valid_types = await self.get_valid_types(ctx.bot) - list_type = list_type.upper() - - if list_type not in valid_types: - - # Maybe the user is using the plural form of this type, - # e.g. "guild_invites" instead of "guild_invite". - # - # This code will support the simple plural form (a single 's' at the end), - # which works for all current list types, but if a list type is added in the future - # which has an irregular plural form (like 'ies'), this code will need to be - # refactored to support this. - if list_type.endswith("S") and list_type[:-1] in valid_types: - list_type = list_type[:-1] - - else: - valid_types_list = '\n'.join([f"• {type_.lower()}" for type_ in valid_types]) - raise BadArgument( - f"You have provided an invalid list type!\n\n" - f"Please provide one of the following: \n{valid_types_list}" - ) - return list_type - - class Extension(Converter): """ Fully qualify the name of an extension and ensure it exists. diff --git a/bot/exts/filtering/FILTERS-DEVELOPMENT.md b/bot/exts/filtering/FILTERS-DEVELOPMENT.md new file mode 100644 index 000000000..d5896d556 --- /dev/null +++ b/bot/exts/filtering/FILTERS-DEVELOPMENT.md @@ -0,0 +1,63 @@ +# Filters Development +This file gives a short overview of the extension, and shows how to perform some basic changes/additions to it. + +## Overview +The main idea is that there is a list of filters each deciding whether they apply to the given content. +For example, there can be a filter that decides it will trigger when the content contains the string "lemon". + +There are several types of filters, and two filters of the same type differ by their content. +For example, filters of type "token" search for a specific token inside the provided string. +One token filter might look for the string "lemon", while another will look for the string "joe". + +Each filter has a set of settings that decide when it triggers (e.g. in which channels), and what happens if it does (e.g. delete the message). +Filters of a specific type can have additional settings that are special to them. + +A list of filters is contained within a filter list. +The filter list gets content to filter, and dispatches it to each of its filters. +It takes the answers from its filters and returns a unified response (e.g. if at least one of the filters says it should be deleted, then the filter list response will include it). + +A filter list has the same set of possible settings, which act as defaults. +If a filter in the list doesn't define a value for a setting (meaning it has a value of None), it will use the value of the containing filter list. + +The cog receives "filtering events". For example, a new message is sent. +It creates a "filtering context" with everything a filtering list needs to know to provide an answer for what should be done. +For example, if the event is a new message, then the content to filter is the content of the message, embeds if any exist, etc. + +The cog dispatches the event to each filter list, gets the result from each, compiles them, and takes any action dictated by them. +For example, if any of the filter lists want the message to be deleted, then the cog will delete it. + +## Example Changes +### Creating a new type of filter list +1. Head over to `bot.exts.filtering._filter_lists` and create a new Python file. +2. Subclass the FilterList class in `bot.exts.filtering._filter_lists.filter_list` and implement its abstract methods. Make sure to set the `name` class attribute. + +You can now add filter lists to the database with the same name defined in the new FilterList subclass. + +### Creating a new type of filter +1. Head over to `bot.exts.filtering._filters` and create a new Python file. +2. Subclass the Filter class in `bot.exts.filtering._filters.filter` and implement its abstract methods. +3. Make sure to set the `name` class attribute, and have one of the FilterList subclasses return this new Filter subclass in `get_filter_type`. + +### Creating a new type of setting +1. Head over to `bot.exts.filtering._settings_types`, and open a new Python file in either `actions` or `validations`, depending on whether you want to subclass `ActionEntry` or `ValidationEntry`. +2. Subclass one of the aforementioned classes, and implement its abstract methods. Make sure to set the `name` and `description` class attributes. + +You can now make the appropriate changes to the site repo: +1. Add a new field in the `Filter` and `FilterList` models. Make sure that on `Filter` it's nullable, and on `FilterList` it isn't. +2. In `serializers.py`, add the new field to `SETTINGS_FIELDS`, and to `ALLOW_BLANK_SETTINGS` or `ALLOW_EMPTY_SETTINGS` if appropriate. If it's not a part of any group of settings, add it `BASE_SETTINGS_FIELDS`, otherwise add it to the appropriate group or create a new one. +3. If you created a new group, make sure it's used in `to_representation`. +4. Update the docs in the filter viewsets. + +You can merge the changes to the bot first - if no such field is loaded from the database it'll just be ignored. + +You can define entries that are a group of fields in the database. +In that case the created subclass should have fields whose names are the names of the fields in the database. +Then, the description will be a dictionary, whose keys are the names of the fields, and values are the descriptions for each field. + +### Creating a new type of filtering event +1. Head over to `bot.exts.filtering._filter_context` and add a new value to the `Event` enum. +2. Implement the dispatching and actioning of the new event in the cog, by either adding it to an existing even listener, or creating a new one. +3. Have the appropriate filter lists subscribe to the event, so they receive it. +4. Have the appropriate unique filters (currently under `unique` and `antispam` in `bot.exts.filtering._filters`) subscribe to the event, so they receive it. + +It should be noted that the filtering events don't need to correspond to Discord events. For example, `nickname` isn't a Discord event and is dispatched when a message is sent. diff --git a/bot/exts/filters/__init__.py b/bot/exts/filtering/__init__.py index e69de29bb..e69de29bb 100644 --- a/bot/exts/filters/__init__.py +++ b/bot/exts/filtering/__init__.py diff --git a/bot/exts/filtering/_filter_context.py b/bot/exts/filtering/_filter_context.py new file mode 100644 index 000000000..8e1ed5788 --- /dev/null +++ b/bot/exts/filtering/_filter_context.py @@ -0,0 +1,64 @@ +from __future__ import annotations + +import typing +from collections.abc import Callable, Coroutine, Iterable +from dataclasses import dataclass, field, replace +from enum import Enum, auto + +from discord import DMChannel, Embed, Member, Message, TextChannel, Thread, User + +from bot.utils.message_cache import MessageCache + +if typing.TYPE_CHECKING: + from bot.exts.filtering._filters.filter import Filter + + +class Event(Enum): + """Types of events that can trigger filtering. Note this does not have to align with gateway event types.""" + + MESSAGE = auto() + MESSAGE_EDIT = auto() + NICKNAME = auto() + + +@dataclass +class FilterContext: + """A dataclass containing the information that should be filtered, and output information of the filtering.""" + + # Input context + event: Event # The type of event + author: User | Member | None # Who triggered the event + channel: TextChannel | Thread | DMChannel | None # The channel involved + content: str | Iterable # What actually needs filtering. The Iterable type depends on the filter list. + message: Message | None # The message involved + embeds: list[Embed] = field(default_factory=list) # Any embeds involved + before_message: Message | None = None + message_cache: MessageCache | None = None + # Output context + dm_content: str = "" # The content to DM the invoker + dm_embed: str = "" # The embed description to DM the invoker + send_alert: bool = False # Whether to send an alert for the moderators + alert_content: str = "" # The content of the alert + alert_embeds: list[Embed] = field(default_factory=list) # Any embeds to add to the alert + action_descriptions: list[str] = field(default_factory=list) # What actions were taken + matches: list[str] = field(default_factory=list) # What exactly was found + notification_domain: str = "" # A domain to send the user for context + filter_info: dict['Filter', str] = field(default_factory=dict) # Additional info from a filter. + messages_deletion: bool = False # Whether the messages were deleted. Can't upload deletion log otherwise. + # Additional actions to perform + additional_actions: list[Callable[[FilterContext], Coroutine]] = field(default_factory=list) + related_messages: set[Message] = field(default_factory=set) # Deletion will include these. + related_channels: set[TextChannel | Thread | DMChannel] = field(default_factory=set) + attachments: dict[int, list[str]] = field(default_factory=dict) # Message ID to attachment URLs. + upload_deletion_logs: bool = True # Whether it's allowed to upload deletion logs. + + @classmethod + def from_message( + cls, event: Event, message: Message, before: Message | None = None, cache: MessageCache | None = None + ) -> FilterContext: + """Create a filtering context from the attributes of a message.""" + return cls(event, message.author, message.channel, message.content, message, message.embeds, before, cache) + + def replace(self, **changes) -> FilterContext: + """Return a new context object assigning new values to the specified fields.""" + return replace(self, **changes) diff --git a/bot/exts/filtering/_filter_lists/__init__.py b/bot/exts/filtering/_filter_lists/__init__.py new file mode 100644 index 000000000..82e0452f9 --- /dev/null +++ b/bot/exts/filtering/_filter_lists/__init__.py @@ -0,0 +1,9 @@ +from os.path import dirname + +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType, list_type_converter +from bot.exts.filtering._utils import subclasses_in_package + +filter_list_types = subclasses_in_package(dirname(__file__), f"{__name__}.", FilterList) +filter_list_types = {filter_list.name: filter_list for filter_list in filter_list_types} + +__all__ = [filter_list_types, FilterList, ListType, list_type_converter] diff --git a/bot/exts/filtering/_filter_lists/antispam.py b/bot/exts/filtering/_filter_lists/antispam.py new file mode 100644 index 000000000..0e7ab2bdc --- /dev/null +++ b/bot/exts/filtering/_filter_lists/antispam.py @@ -0,0 +1,191 @@ +import asyncio +import typing +from collections.abc import Callable, Coroutine +from dataclasses import dataclass, field +from datetime import timedelta +from functools import reduce +from itertools import takewhile +from operator import add, or_ + +import arrow +from discord import Member +from pydis_core.utils import scheduling +from pydis_core.utils.logging import get_logger + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filter_lists.filter_list import ListType, SubscribingAtomicList, UniquesListBase +from bot.exts.filtering._filters.antispam import antispam_filter_types +from bot.exts.filtering._filters.filter import Filter, UniqueFilter +from bot.exts.filtering._settings import ActionSettings +from bot.exts.filtering._settings_types.actions.infraction_and_notification import Infraction +from bot.exts.filtering._ui.ui import AlertView, build_mod_alert + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + +log = get_logger(__name__) + +ALERT_DELAY = 6 + + +class AntispamList(UniquesListBase): + """ + A list of anti-spam rules. + + Messages from the last X seconds are passed to each rule, which decides whether it triggers across those messages. + + The infraction reason is set dynamically. + """ + + name = "antispam" + + def __init__(self, filtering_cog: 'Filtering'): + super().__init__(filtering_cog) + self.message_deletion_queue: dict[Member, DeletionContext] = dict() + + def get_filter_type(self, content: str) -> type[UniqueFilter] | None: + """Get a subclass of filter matching the filter list and the filter's content.""" + try: + return antispam_filter_types[content] + except KeyError: + if content not in self._already_warned: + log.warning(f"An antispam filter named {content} was supplied, but no matching implementation found.") + self._already_warned.add(content) + return None + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + if not ctx.message or not ctx.message_cache: + return None, [], {} + + sublist: SubscribingAtomicList = self[ListType.DENY] + potential_filters = [sublist.filters[id_] for id_ in sublist.subscriptions[ctx.event]] + max_interval = max(filter_.extra_fields.interval for filter_ in potential_filters) + + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=max_interval) + relevant_messages = list( + takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.message_cache) + ) + new_ctx = ctx.replace(content=relevant_messages) + triggers = await sublist.filter_list_result(new_ctx) + if not triggers: + return None, [], {} + + if ctx.author not in self.message_deletion_queue: + self.message_deletion_queue[ctx.author] = DeletionContext() + ctx.additional_actions.append(self._create_deletion_context_handler(ctx.author)) + ctx.related_channels |= {msg.channel for msg in ctx.related_messages} + else: # The additional messages found are already part of a deletion context + ctx.related_messages = set() + current_infraction = self.message_deletion_queue[ctx.author].current_infraction + # In case another filter wants an alert, prevent deleted messages from being uploaded now and also for + # the spam alert (upload happens during alerting). + # Deleted messages API doesn't accept duplicates and will error. + # Additional messages are necessarily part of the deletion. + ctx.upload_deletion_logs = False + self.message_deletion_queue[ctx.author].add(ctx, triggers) + + current_actions = sublist.merge_actions(triggers) + # Don't alert yet. + current_actions.pop("ping", None) + current_actions.pop("send_alert", None) + + new_infraction = current_actions["infraction_and_notification"].copy() + # Smaller infraction value => higher in hierarchy. + if not current_infraction or new_infraction.infraction_type.value < current_infraction.value: + # Pick the first triggered filter for the reason, there's no good way to decide between them. + new_infraction.infraction_reason = ( + f"{triggers[0].name.replace('_', ' ')} spam – {ctx.filter_info[triggers[0]]}" + ) + current_actions["infraction_and_notification"] = new_infraction + self.message_deletion_queue[ctx.author].current_infraction = new_infraction.infraction_type + else: + current_actions.pop("infraction_and_notification", None) + + # Provide some message in case another filter list wants there to be an alert. + return current_actions, ["Handling spam event..."], {ListType.DENY: triggers} + + def _create_deletion_context_handler(self, context_id: Member) -> Callable[[FilterContext], Coroutine]: + async def schedule_processing(ctx: FilterContext) -> None: + """ + Schedule a coroutine to process the deletion context. + + It cannot be awaited directly, as it waits ALERT_DELAY seconds, and actioning a filtering context depends on + all actions finishing. + + This is async and takes a context to adhere to the type of ctx.additional_actions. + """ + async def process_deletion_context() -> None: + """Processes the Deletion Context queue.""" + log.trace("Sleeping before processing message deletion queue.") + await asyncio.sleep(ALERT_DELAY) + + if context_id not in self.message_deletion_queue: + log.error(f"Started processing deletion queue for context `{context_id}`, but it was not found!") + return + + deletion_context = self.message_deletion_queue.pop(context_id) + await deletion_context.send_alert(self) + + scheduling.create_task(process_deletion_context()) + + return schedule_processing + + +@dataclass +class DeletionContext: + """Represents a Deletion Context for a single spam event.""" + + contexts: list[FilterContext] = field(default_factory=list) + rules: set[UniqueFilter] = field(default_factory=set) + current_infraction: Infraction | None = None + + def add(self, ctx: FilterContext, rules: list[UniqueFilter]) -> None: + """Adds new rule violation events to the deletion context.""" + self.contexts.append(ctx) + self.rules.update(rules) + + async def send_alert(self, antispam_list: AntispamList) -> None: + """Post the mod alert.""" + if not self.contexts or not self.rules: + return + + webhook = antispam_list.filtering_cog.webhook + if not webhook: + return + + ctx, *other_contexts = self.contexts + new_ctx = FilterContext(ctx.event, ctx.author, ctx.channel, ctx.content, ctx.message) + new_ctx.action_descriptions = reduce( + add, (other_ctx.action_descriptions for other_ctx in other_contexts), ctx.action_descriptions + ) + # It shouldn't ever come to this, but just in case. + if descriptions_num := len(new_ctx.action_descriptions) > 20: + new_ctx.action_descriptions = new_ctx.action_descriptions[:20] + new_ctx.action_descriptions[-1] += f" (+{descriptions_num - 20} other actions)" + new_ctx.related_messages = reduce( + or_, (other_ctx.related_messages for other_ctx in other_contexts), ctx.related_messages + ) | {ctx.message for ctx in other_contexts} + new_ctx.related_channels = reduce( + or_, (other_ctx.related_channels for other_ctx in other_contexts), ctx.related_channels + ) | {ctx.channel for ctx in other_contexts} + new_ctx.attachments = reduce(or_, (other_ctx.attachments for other_ctx in other_contexts), ctx.attachments) + new_ctx.upload_deletion_logs = True + new_ctx.messages_deletion = all(ctx.messages_deletion for ctx in self.contexts) + + rules = list(self.rules) + actions = antispam_list[ListType.DENY].merge_actions(rules) + for action in list(actions): + if action not in ("ping", "send_alert"): + actions.pop(action, None) + await actions.action(new_ctx) + + messages = antispam_list[ListType.DENY].format_messages(rules) + embed = await build_mod_alert(new_ctx, {antispam_list: messages}) + if other_contexts: + embed.set_footer( + text="The list of actions taken includes actions from additional contexts after deletion began." + ) + await webhook.send(username="Anti-Spam", content=ctx.alert_content, embeds=[embed], view=AlertView(new_ctx)) diff --git a/bot/exts/filtering/_filter_lists/domain.py b/bot/exts/filtering/_filter_lists/domain.py new file mode 100644 index 000000000..f4062edfe --- /dev/null +++ b/bot/exts/filtering/_filter_lists/domain.py @@ -0,0 +1,64 @@ +from __future__ import annotations + +import re +import typing + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType +from bot.exts.filtering._filters.domain import DomainFilter +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._settings import ActionSettings +from bot.exts.filtering._utils import clean_input + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + +URL_RE = re.compile(r"https?://(\S+)", flags=re.IGNORECASE) + + +class DomainsList(FilterList[DomainFilter]): + """ + A list of filters, each looking for a specific domain given by URL. + + The blacklist defaults dictate what happens by default when a filter is matched, and can be overridden by + individual filters. + + Domains are found by looking for a URL schema (http or https). + Filters will also trigger for subdomains. + """ + + name = "domain" + + def __init__(self, filtering_cog: Filtering): + super().__init__() + filtering_cog.subscribe(self, Event.MESSAGE, Event.MESSAGE_EDIT) + + def get_filter_type(self, content: str) -> type[Filter]: + """Get a subclass of filter matching the filter list and the filter's content.""" + return DomainFilter + + @property + def filter_types(self) -> set[type[Filter]]: + """Return the types of filters used by this list.""" + return {DomainFilter} + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + text = ctx.content + if not text: + return None, [], {} + + text = clean_input(text) + urls = {match.group(1).lower().rstrip("/") for match in URL_RE.finditer(text)} + new_ctx = ctx.replace(content=urls) + + triggers = await self[ListType.DENY].filter_list_result(new_ctx) + ctx.notification_domain = new_ctx.notification_domain + actions = None + messages = [] + if triggers: + actions = self[ListType.DENY].merge_actions(triggers) + messages = self[ListType.DENY].format_messages(triggers) + return actions, messages, {ListType.DENY: triggers} diff --git a/bot/exts/filtering/_filter_lists/extension.py b/bot/exts/filtering/_filter_lists/extension.py new file mode 100644 index 000000000..a739d7191 --- /dev/null +++ b/bot/exts/filtering/_filter_lists/extension.py @@ -0,0 +1,116 @@ +from __future__ import annotations + +import typing +from os.path import splitext + +import bot +from bot.constants import Channels, URLs +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType +from bot.exts.filtering._filters.extension import ExtensionFilter +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._settings import ActionSettings + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + + +PY_EMBED_DESCRIPTION = ( + "It looks like you tried to attach a Python file - " + f"please use a code-pasting service such as {URLs.site_schema}{URLs.site_paste}" +) + +TXT_LIKE_FILES = {".txt", ".csv", ".json"} +TXT_EMBED_DESCRIPTION = ( + "You either uploaded a `{blocked_extension}` file or entered a message that was too long. " + f"Please use our [paste bin]({URLs.site_schema}{URLs.site_paste}) instead." +) + +DISALLOWED_EMBED_DESCRIPTION = ( + "It looks like you tried to attach file type(s) that we do not allow ({blocked_extensions_str}). " + "We currently allow the following file types: **{joined_whitelist}**.\n\n" + "Feel free to ask in {meta_channel_mention} if you think this is a mistake." +) + + +class ExtensionsList(FilterList[ExtensionFilter]): + """ + A list of filters, each looking for a file attachment with a specific extension. + + If an extension is not explicitly allowed, it will be blocked. + + Whitelist defaults dictate what happens when an extension is *not* explicitly allowed, + and whitelist filters overrides have no effect. + + Items should be added as file extensions preceded by a dot. + """ + + name = "extension" + + def __init__(self, filtering_cog: Filtering): + super().__init__() + filtering_cog.subscribe(self, Event.MESSAGE) + self._whitelisted_description = None + + def get_filter_type(self, content: str) -> type[Filter]: + """Get a subclass of filter matching the filter list and the filter's content.""" + return ExtensionFilter + + @property + def filter_types(self) -> set[type[Filter]]: + """Return the types of filters used by this list.""" + return {ExtensionFilter} + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + # Return early if the message doesn't have attachments. + if not ctx.message or not ctx.message.attachments: + return None, [], {} + + _, failed = self[ListType.ALLOW].defaults.validations.evaluate(ctx) + if failed: # There's no extension filtering in this context. + return None, [], {} + + # Find all extensions in the message. + all_ext = { + (splitext(attachment.filename.lower())[1], attachment.filename) for attachment in ctx.message.attachments + } + new_ctx = ctx.replace(content={ext for ext, _ in all_ext}) # And prepare the context for the filters to read. + triggered = [ + filter_ for filter_ in self[ListType.ALLOW].filters.values() if await filter_.triggered_on(new_ctx) + ] + allowed_ext = {filter_.content for filter_ in triggered} # Get the extensions in the message that are allowed. + + # See if there are any extensions left which aren't allowed. + not_allowed = {ext: filename for ext, filename in all_ext if ext not in allowed_ext} + + if not not_allowed: # Yes, it's a double negative. Meaning all attachments are allowed :) + return None, [], {ListType.ALLOW: triggered} + + # Something is disallowed. + if ".py" in not_allowed: + # Provide a pastebin link for .py files. + ctx.dm_embed = PY_EMBED_DESCRIPTION + elif txt_extensions := {ext for ext in TXT_LIKE_FILES if ext in not_allowed}: + # Work around Discord auto-conversion of messages longer than 2000 chars to .txt + cmd_channel = bot.instance.get_channel(Channels.bot_commands) + ctx.dm_embed = TXT_EMBED_DESCRIPTION.format( + blocked_extension=txt_extensions.pop(), + cmd_channel_mention=cmd_channel.mention + ) + else: + meta_channel = bot.instance.get_channel(Channels.meta) + if not self._whitelisted_description: + self._whitelisted_description = ', '.join( + filter_.content for filter_ in self[ListType.ALLOW].filters.values() + ) + ctx.dm_embed = DISALLOWED_EMBED_DESCRIPTION.format( + joined_whitelist=self._whitelisted_description, + blocked_extensions_str=", ".join(not_allowed), + meta_channel_mention=meta_channel.mention, + ) + + ctx.matches += not_allowed.values() + return self[ListType.ALLOW].defaults.actions, [f"`{ext}`" for ext in not_allowed], {ListType.ALLOW: triggered} diff --git a/bot/exts/filtering/_filter_lists/filter_list.py b/bot/exts/filtering/_filter_lists/filter_list.py new file mode 100644 index 000000000..bf02071cf --- /dev/null +++ b/bot/exts/filtering/_filter_lists/filter_list.py @@ -0,0 +1,308 @@ +import dataclasses +import typing +from abc import abstractmethod +from collections import defaultdict +from collections.abc import Iterable +from dataclasses import dataclass +from enum import Enum +from functools import reduce +from typing import Any + +import arrow +from discord.ext.commands import BadArgument + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import Filter, UniqueFilter +from bot.exts.filtering._settings import ActionSettings, Defaults, create_settings +from bot.exts.filtering._utils import FieldRequiring, past_tense +from bot.log import get_logger + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + +log = get_logger(__name__) + + +class ListType(Enum): + """An enumeration of list types.""" + + DENY = 0 + ALLOW = 1 + + +# Alternative names with which each list type can be specified in commands. +aliases = ( + (ListType.DENY, {"deny", "blocklist", "blacklist", "denylist", "bl", "dl"}), + (ListType.ALLOW, {"allow", "allowlist", "whitelist", "al", "wl"}) +) + + +def list_type_converter(argument: str) -> ListType: + """A converter to get the appropriate list type.""" + argument = argument.lower() + for list_type, list_aliases in aliases: + if argument in list_aliases or argument in map(past_tense, list_aliases): + return list_type + raise BadArgument(f"No matching list type found for {argument!r}.") + + +# AtomicList and its subclasses must have eq=False, otherwise the dataclass deco will replace the hash function. +@dataclass(frozen=True, eq=False) +class AtomicList: + """ + Represents the atomic structure of a single filter list as it appears in the database. + + This is as opposed to the FilterList class which is a combination of several list types. + """ + + id: int + created_at: arrow.Arrow + updated_at: arrow.Arrow + name: str + list_type: ListType + defaults: Defaults + filters: dict[int, Filter] + + @property + def label(self) -> str: + """Provide a short description identifying the list with its name and type.""" + return f"{past_tense(self.list_type.name.lower())} {self.name.lower()}" + + async def filter_list_result(self, ctx: FilterContext) -> list[Filter]: + """ + Sift through the list of filters, and return only the ones which apply to the given context. + + The strategy is as follows: + 1. The default settings are evaluated on the given context. The default answer for whether the filter is + relevant in the given context is whether there aren't any validation settings which returned False. + 2. For each filter, its overrides are considered: + - If there are no overrides, then the filter is relevant if that is the default answer. + - Otherwise it is relevant if there are no failed overrides, and any failing default is overridden by a + successful override. + + If the filter is relevant in context, see if it actually triggers. + """ + return await self._create_filter_list_result(ctx, self.defaults, self.filters.values()) + + async def _create_filter_list_result( + self, ctx: FilterContext, defaults: Defaults, filters: Iterable[Filter] + ) -> list[Filter]: + """A helper function to evaluate the result of `filter_list_result`.""" + passed_by_default, failed_by_default = defaults.validations.evaluate(ctx) + default_answer = not bool(failed_by_default) + + relevant_filters = [] + for filter_ in filters: + if not filter_.validations: + if default_answer and await filter_.triggered_on(ctx): + relevant_filters.append(filter_) + else: + passed, failed = filter_.validations.evaluate(ctx) + if not failed and failed_by_default < passed: + if await filter_.triggered_on(ctx): + relevant_filters.append(filter_) + + if ctx.event == Event.MESSAGE_EDIT and ctx.message and self.list_type == ListType.DENY: + previously_triggered = ctx.message_cache.get_message_metadata(ctx.message.id) + # The message might not be cached. + if previously_triggered: + ignore_filters = previously_triggered[self] + # This updates the cache. Some filters are ignored, but they're necessary if there's another edit. + previously_triggered[self] = relevant_filters + relevant_filters = [filter_ for filter_ in relevant_filters if filter_ not in ignore_filters] + return relevant_filters + + def default(self, setting_name: str) -> Any: + """Get the default value of a specific setting.""" + missing = object() + value = self.defaults.actions.get_setting(setting_name, missing) + if value is missing: + value = self.defaults.validations.get_setting(setting_name, missing) + if value is missing: + raise ValueError(f"Couldn't find a setting named {setting_name!r}.") + return value + + def merge_actions(self, filters: list[Filter]) -> ActionSettings | None: + """ + Merge the settings of the given filters, with the list's defaults as fallback. + + If `merge_default` is True, include it in the merge instead of using it as a fallback. + """ + if not filters: # Nothing to action. + return None + try: + return reduce( + ActionSettings.union, (filter_.actions or self.defaults.actions for filter_ in filters) + ).fallback_to(self.defaults.actions) + except TypeError: + # The sequence fed to reduce is empty, meaning none of the filters have actions, + # meaning they all use the defaults. + return self.defaults.actions + + @staticmethod + def format_messages(triggers: list[Filter], *, expand_single_filter: bool = True) -> list[str]: + """Convert the filters into strings that can be added to the alert embed.""" + if len(triggers) == 1 and expand_single_filter: + message = f"#{triggers[0].id} (`{triggers[0].content}`)" + if triggers[0].description: + message += f" - {triggers[0].description}" + messages = [message] + else: + messages = [f"{filter_.id} (`{filter_.content}`)" for filter_ in triggers] + return messages + + def __hash__(self): + return hash(id(self)) + + +T = typing.TypeVar("T", bound=Filter) + + +class FilterList(dict[ListType, AtomicList], typing.Generic[T], FieldRequiring): + """Dispatches events to lists of _filters, and aggregates the responses into a single list of actions to take.""" + + # Each subclass must define a name matching the filter_list name we're expecting to receive from the database. + # Names must be unique across all filter lists. + name = FieldRequiring.MUST_SET_UNIQUE + + _already_warned = set() + + def add_list(self, list_data: dict) -> AtomicList: + """Add a new type of list (such as a whitelist or a blacklist) this filter list.""" + actions, validations = create_settings(list_data["settings"], keep_empty=True) + list_type = ListType(list_data["list_type"]) + defaults = Defaults(actions, validations) + + filters = {} + for filter_data in list_data["filters"]: + new_filter = self._create_filter(filter_data, defaults) + if new_filter: + filters[filter_data["id"]] = new_filter + + self[list_type] = AtomicList( + list_data["id"], + arrow.get(list_data["created_at"]), + arrow.get(list_data["updated_at"]), + self.name, + list_type, + defaults, + filters + ) + return self[list_type] + + def add_filter(self, list_type: ListType, filter_data: dict) -> T | None: + """Add a filter to the list of the specified type.""" + new_filter = self._create_filter(filter_data, self[list_type].defaults) + if new_filter: + self[list_type].filters[filter_data["id"]] = new_filter + return new_filter + + @abstractmethod + def get_filter_type(self, content: str) -> type[T]: + """Get a subclass of filter matching the filter list and the filter's content.""" + + @property + @abstractmethod + def filter_types(self) -> set[type[T]]: + """Return the types of filters used by this list.""" + + @abstractmethod + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + + def _create_filter(self, filter_data: dict, defaults: Defaults) -> T | None: + """Create a filter from the given data.""" + try: + content = filter_data["content"] + filter_type = self.get_filter_type(content) + if filter_type: + return filter_type(filter_data, defaults) + elif content not in self._already_warned: + log.warning(f"A filter named {content} was supplied, but no matching implementation found.") + self._already_warned.add(content) + return None + except TypeError as e: + log.warning(e) + + def __hash__(self): + return hash(id(self)) + + +@dataclass(frozen=True, eq=False) +class SubscribingAtomicList(AtomicList): + """ + A base class for a list of unique filters. + + Unique filters are ones that should only be run once in a given context. + Each unique filter is subscribed to a subset of events to respond to. + """ + + subscriptions: defaultdict[Event, list[int]] = dataclasses.field(default_factory=lambda: defaultdict(list)) + + def subscribe(self, filter_: UniqueFilter, *events: Event) -> None: + """ + Subscribe a unique filter to the given events. + + The filter is added to a list for each event. When the event is triggered, the filter context will be + dispatched to the subscribed filters. + """ + for event in events: + if filter_ not in self.subscriptions[event]: + self.subscriptions[event].append(filter_.id) + + async def filter_list_result(self, ctx: FilterContext) -> list[Filter]: + """Sift through the list of filters, and return only the ones which apply to the given context.""" + event_filters = [self.filters[id_] for id_ in self.subscriptions[ctx.event]] + return await self._create_filter_list_result(ctx, self.defaults, event_filters) + + +class UniquesListBase(FilterList[UniqueFilter]): + """ + A list of unique filters. + + Unique filters are ones that should only be run once in a given context. + Each unique filter subscribes to a subset of events to respond to. + """ + + def __init__(self, filtering_cog: 'Filtering'): + super().__init__() + self.filtering_cog = filtering_cog + self.loaded_types: dict[str, type[UniqueFilter]] = {} + + def add_list(self, list_data: dict) -> SubscribingAtomicList: + """Add a new type of list (such as a whitelist or a blacklist) this filter list.""" + actions, validations = create_settings(list_data["settings"], keep_empty=True) + list_type = ListType(list_data["list_type"]) + defaults = Defaults(actions, validations) + new_list = SubscribingAtomicList( + list_data["id"], + arrow.get(list_data["created_at"]), + arrow.get(list_data["updated_at"]), + self.name, + list_type, + defaults, + {} + ) + self[list_type] = new_list + + filters = {} + events = set() + for filter_data in list_data["filters"]: + new_filter = self._create_filter(filter_data, defaults) + if new_filter: + new_list.subscribe(new_filter, *new_filter.events) + filters[filter_data["id"]] = new_filter + self.loaded_types[new_filter.name] = type(new_filter) + events.update(new_filter.events) + + new_list.filters.update(filters) + if hasattr(self.filtering_cog, "subscribe"): # Subscribe the filter list to any new events found. + self.filtering_cog.subscribe(self, *events) + return new_list + + @property + def filter_types(self) -> set[type[UniqueFilter]]: + """Return the types of filters used by this list.""" + return set(self.loaded_types.values()) diff --git a/bot/exts/filtering/_filter_lists/invite.py b/bot/exts/filtering/_filter_lists/invite.py new file mode 100644 index 000000000..bd0eaa122 --- /dev/null +++ b/bot/exts/filtering/_filter_lists/invite.py @@ -0,0 +1,154 @@ +from __future__ import annotations + +import typing + +from discord import Embed, Invite +from discord.errors import NotFound +from pydis_core.utils.regex import DISCORD_INVITE + +import bot +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._filters.invite import InviteFilter +from bot.exts.filtering._settings import ActionSettings +from bot.exts.filtering._utils import clean_input + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + + +class InviteList(FilterList[InviteFilter]): + """ + A list of filters, each looking for guild invites to a specific guild. + + If the invite is not whitelisted, it will be blocked. Partnered and verified servers are allowed unless blacklisted. + + Whitelist defaults dictate what happens when an invite is *not* explicitly allowed, + and whitelist filters overrides have no effect. + + Blacklist defaults dictate what happens by default when an explicitly blocked invite is found. + + Items in the list are added through invites for the purpose of fetching the guild info. + Items are stored as guild IDs, guild invites are *not* stored. + """ + + name = "invite" + + def __init__(self, filtering_cog: Filtering): + super().__init__() + filtering_cog.subscribe(self, Event.MESSAGE, Event.MESSAGE_EDIT) + + def get_filter_type(self, content: str) -> type[Filter]: + """Get a subclass of filter matching the filter list and the filter's content.""" + return InviteFilter + + @property + def filter_types(self) -> set[type[Filter]]: + """Return the types of filters used by this list.""" + return {InviteFilter} + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + text = clean_input(ctx.content) + + # Avoid escape characters + text = text.replace("\\", "") + + matches = list(DISCORD_INVITE.finditer(text)) + invite_codes = {m.group("invite") for m in matches} + if not invite_codes: + return None, [], {} + all_triggers = {} + + _, failed = self[ListType.ALLOW].defaults.validations.evaluate(ctx) + # If the allowed list doesn't operate in the context, unknown invites are allowed. + check_if_allowed = not failed + + # Sort the invites into two categories: + invites_for_inspection = dict() # Found guild invites requiring further inspection. + unknown_invites = dict() # Either don't resolve or group DMs. + for invite_code in invite_codes: + try: + invite = await bot.instance.fetch_invite(invite_code) + except NotFound: + if check_if_allowed: + unknown_invites[invite_code] = None + else: + if invite.guild: + invites_for_inspection[invite_code] = invite + elif check_if_allowed: # Group DM + unknown_invites[invite_code] = invite + + # Find any blocked invites + new_ctx = ctx.replace(content={invite.guild.id for invite in invites_for_inspection.values()}) + triggered = await self[ListType.DENY].filter_list_result(new_ctx) + blocked_guilds = {filter_.content for filter_ in triggered} + blocked_invites = { + code: invite for code, invite in invites_for_inspection.items() if invite.guild.id in blocked_guilds + } + + # Remove the ones which are already confirmed as blocked, or otherwise ones which are partnered or verified. + invites_for_inspection = { + code: invite for code, invite in invites_for_inspection.items() + if invite.guild.id not in blocked_guilds + and "PARTNERED" not in invite.guild.features and "VERIFIED" not in invite.guild.features + } + + # Remove any remaining invites which are allowed + guilds_for_inspection = {invite.guild.id for invite in invites_for_inspection.values()} + + if check_if_allowed: # Whether unknown invites need to be checked. + new_ctx = ctx.replace(content=guilds_for_inspection) + all_triggers[ListType.ALLOW] = [ + filter_ for filter_ in self[ListType.ALLOW].filters.values() + if await filter_.triggered_on(new_ctx) + ] + allowed = {filter_.content for filter_ in all_triggers[ListType.ALLOW]} + unknown_invites.update({ + code: invite for code, invite in invites_for_inspection.items() if invite.guild.id not in allowed + }) + + if not triggered and not unknown_invites: + return None, [], all_triggers + + actions = None + if unknown_invites: # There are invites which weren't allowed but aren't explicitly blocked. + actions = self[ListType.ALLOW].defaults.actions + # Blocked invites come second so that their actions have preference. + if triggered: + if actions: + actions = actions.union(self[ListType.DENY].merge_actions(triggered)) + else: + actions = self[ListType.DENY].merge_actions(triggered) + all_triggers[ListType.DENY] = triggered + + blocked_invites |= unknown_invites + ctx.matches += {match[0] for match in matches if match.group("invite") in blocked_invites} + ctx.alert_embeds += (self._guild_embed(invite) for invite in blocked_invites.values() if invite) + messages = self[ListType.DENY].format_messages(triggered) + messages += [ + f"`{code} - {invite.guild.id}`" if invite else f"`{code}`" for code, invite in unknown_invites.items() + ] + return actions, messages, all_triggers + + @staticmethod + def _guild_embed(invite: Invite) -> Embed: + """Return an embed representing the guild invites to.""" + embed = Embed() + if invite.guild: + embed.title = invite.guild.name + embed.set_thumbnail(url=invite.guild.icon.url) + embed.set_footer(text=f"Guild ID: {invite.guild.id}") + else: + embed.title = "Group DM" + + embed.description = ( + f"**Invite Code:** {invite.code}\n" + f"**Members:** {invite.approximate_member_count}\n" + f"**Active:** {invite.approximate_presence_count}" + ) + + return embed diff --git a/bot/exts/filtering/_filter_lists/token.py b/bot/exts/filtering/_filter_lists/token.py new file mode 100644 index 000000000..f5da28bb5 --- /dev/null +++ b/bot/exts/filtering/_filter_lists/token.py @@ -0,0 +1,72 @@ +from __future__ import annotations + +import re +import typing + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._filters.token import TokenFilter +from bot.exts.filtering._settings import ActionSettings +from bot.exts.filtering._utils import clean_input + +if typing.TYPE_CHECKING: + from bot.exts.filtering.filtering import Filtering + +SPOILER_RE = re.compile(r"(\|\|.+?\|\|)", re.DOTALL) + + +class TokensList(FilterList[TokenFilter]): + """ + A list of filters, each looking for a specific token in the given content given as regex. + + The blacklist defaults dictate what happens by default when a filter is matched, and can be overridden by + individual filters. + + Usually, if blocking literal strings, the literals themselves can be specified as the filter's value. + But since this is a list of regex patterns, be careful of the items added. For example, a dot needs to be escaped + to function as a literal dot. + """ + + name = "token" + + def __init__(self, filtering_cog: Filtering): + super().__init__() + filtering_cog.subscribe(self, Event.MESSAGE, Event.MESSAGE_EDIT, Event.NICKNAME) + + def get_filter_type(self, content: str) -> type[Filter]: + """Get a subclass of filter matching the filter list and the filter's content.""" + return TokenFilter + + @property + def filter_types(self) -> set[type[Filter]]: + """Return the types of filters used by this list.""" + return {TokenFilter} + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + text = ctx.content + if not text: + return None, [], {} + if SPOILER_RE.search(text): + text = self._expand_spoilers(text) + text = clean_input(text) + ctx = ctx.replace(content=text) + + triggers = await self[ListType.DENY].filter_list_result(ctx) + actions = None + messages = [] + if triggers: + actions = self[ListType.DENY].merge_actions(triggers) + messages = self[ListType.DENY].format_messages(triggers) + return actions, messages, {ListType.DENY: triggers} + + @staticmethod + def _expand_spoilers(text: str) -> str: + """Return a string containing all interpretations of a spoilered message.""" + split_text = SPOILER_RE.split(text) + return ''.join( + split_text[0::2] + split_text[1::2] + split_text + ) diff --git a/bot/exts/filtering/_filter_lists/unique.py b/bot/exts/filtering/_filter_lists/unique.py new file mode 100644 index 000000000..a5a04d25a --- /dev/null +++ b/bot/exts/filtering/_filter_lists/unique.py @@ -0,0 +1,39 @@ +from pydis_core.utils.logging import get_logger + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filter_lists.filter_list import ListType, UniquesListBase +from bot.exts.filtering._filters.filter import Filter, UniqueFilter +from bot.exts.filtering._filters.unique import unique_filter_types +from bot.exts.filtering._settings import ActionSettings + +log = get_logger(__name__) + + +class UniquesList(UniquesListBase): + """ + A list of unique filters. + + Unique filters are ones that should only be run once in a given context. + Each unique filter subscribes to a subset of events to respond to. + """ + + name = "unique" + + def get_filter_type(self, content: str) -> type[UniqueFilter] | None: + """Get a subclass of filter matching the filter list and the filter's content.""" + try: + return unique_filter_types[content] + except KeyError: + return None + + async def actions_for( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, list[str], dict[ListType, list[Filter]]]: + """Dispatch the given event to the list's filters, and return actions to take and messages to relay to mods.""" + triggers = await self[ListType.DENY].filter_list_result(ctx) + actions = None + messages = [] + if triggers: + actions = self[ListType.DENY].merge_actions(triggers) + messages = self[ListType.DENY].format_messages(triggers) + return actions, messages, {ListType.DENY: triggers} diff --git a/tests/bot/exts/filters/__init__.py b/bot/exts/filtering/_filters/__init__.py index e69de29bb..e69de29bb 100644 --- a/tests/bot/exts/filters/__init__.py +++ b/bot/exts/filtering/_filters/__init__.py diff --git a/bot/exts/filtering/_filters/antispam/__init__.py b/bot/exts/filtering/_filters/antispam/__init__.py new file mode 100644 index 000000000..637bcd410 --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/__init__.py @@ -0,0 +1,9 @@ +from os.path import dirname + +from bot.exts.filtering._filters.filter import UniqueFilter +from bot.exts.filtering._utils import subclasses_in_package + +antispam_filter_types = subclasses_in_package(dirname(__file__), f"{__name__}.", UniqueFilter) +antispam_filter_types = {filter_.name: filter_ for filter_ in antispam_filter_types} + +__all__ = [antispam_filter_types] diff --git a/bot/exts/filtering/_filters/antispam/attachments.py b/bot/exts/filtering/_filters/antispam/attachments.py new file mode 100644 index 000000000..216d9b886 --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/attachments.py @@ -0,0 +1,43 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + + +class ExtraAttachmentsSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of attachments before the filter is triggered." + + interval: int = 10 + threshold: int = 6 + + +class AttachmentsFilter(UniqueFilter): + """Detects too many attachments sent by a single user.""" + + name = "attachments" + events = (Event.MESSAGE,) + extra_fields_type = ExtraAttachmentsSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author and len(msg.attachments) > 0} + total_recent_attachments = sum(len(msg.attachments) for msg in detected_messages) + + if total_recent_attachments > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_recent_attachments} attachments" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/burst.py b/bot/exts/filtering/_filters/antispam/burst.py new file mode 100644 index 000000000..d78107d0a --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/burst.py @@ -0,0 +1,41 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + + +class ExtraBurstSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of messages before the filter is triggered." + + interval: int = 10 + threshold: int = 7 + + +class BurstFilter(UniqueFilter): + """Detects too many messages sent by a single user.""" + + name = "burst" + events = (Event.MESSAGE,) + extra_fields_type = ExtraBurstSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + if len(detected_messages) > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {len(detected_messages)} messages" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/chars.py b/bot/exts/filtering/_filters/antispam/chars.py new file mode 100644 index 000000000..5c4fa201c --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/chars.py @@ -0,0 +1,43 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + + +class ExtraCharsSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of characters before the filter is triggered." + + interval: int = 5 + threshold: int = 4_200 + + +class CharsFilter(UniqueFilter): + """Detects too many characters sent by a single user.""" + + name = "chars" + events = (Event.MESSAGE,) + extra_fields_type = ExtraCharsSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + total_recent_chars = sum(len(msg.content) for msg in relevant_messages) + + if total_recent_chars > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_recent_chars} characters" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/duplicates.py b/bot/exts/filtering/_filters/antispam/duplicates.py new file mode 100644 index 000000000..60d5c322c --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/duplicates.py @@ -0,0 +1,44 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + + +class ExtraDuplicatesSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of duplicate messages before the filter is triggered." + + interval: int = 10 + threshold: int = 3 + + +class DuplicatesFilter(UniqueFilter): + """Detects duplicated messages sent by a single user.""" + + name = "duplicates" + events = (Event.MESSAGE,) + extra_fields_type = ExtraDuplicatesSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + + detected_messages = { + msg for msg in relevant_messages + if msg.author == ctx.author and msg.content == ctx.message.content and msg.content + } + if len(detected_messages) > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {len(detected_messages)} duplicate messages" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/emoji.py b/bot/exts/filtering/_filters/antispam/emoji.py new file mode 100644 index 000000000..0511e4a7b --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/emoji.py @@ -0,0 +1,53 @@ +import re +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from emoji import demojize +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + +DISCORD_EMOJI_RE = re.compile(r"<:\w+:\d+>|:\w+:") +CODE_BLOCK_RE = re.compile(r"```.*?```", flags=re.DOTALL) + + +class ExtraEmojiSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of emojis before the filter is triggered." + + interval: int = 10 + threshold: int = 20 + + +class EmojiFilter(UniqueFilter): + """Detects too many emojis sent by a single user.""" + + name = "emoji" + events = (Event.MESSAGE,) + extra_fields_type = ExtraEmojiSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + + # Get rid of code blocks in the message before searching for emojis. + # Convert Unicode emojis to :emoji: format to get their count. + total_emojis = sum( + len(DISCORD_EMOJI_RE.findall(demojize(CODE_BLOCK_RE.sub("", msg.content)))) + for msg in relevant_messages + ) + + if total_emojis > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_emojis} emojis" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/links.py b/bot/exts/filtering/_filters/antispam/links.py new file mode 100644 index 000000000..76fe53e70 --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/links.py @@ -0,0 +1,52 @@ +import re +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + +LINK_RE = re.compile(r"(https?://\S+)") + + +class ExtraLinksSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of links before the filter is triggered." + + interval: int = 10 + threshold: int = 10 + + +class DuplicatesFilter(UniqueFilter): + """Detects too many links sent by a single user.""" + + name = "links" + events = (Event.MESSAGE,) + extra_fields_type = ExtraLinksSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + + total_links = 0 + messages_with_links = 0 + for msg in relevant_messages: + total_matches = len(LINK_RE.findall(msg.content)) + if total_matches: + messages_with_links += 1 + total_links += total_matches + + if total_links > self.extra_fields.threshold and messages_with_links > 1: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_links} links" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/mentions.py b/bot/exts/filtering/_filters/antispam/mentions.py new file mode 100644 index 000000000..f3c945e16 --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/mentions.py @@ -0,0 +1,90 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from discord import DeletedReferencedMessage, MessageType, NotFound +from pydantic import BaseModel +from pydis_core.utils.logging import get_logger + +import bot +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + +log = get_logger(__name__) + + +class ExtraMentionsSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of distinct mentions before the filter is triggered." + + interval: int = 10 + threshold: int = 5 + + +class DuplicatesFilter(UniqueFilter): + """ + Detects total mentions exceeding the limit sent by a single user. + + Excludes mentions that are bots, themselves, or replied users. + + In very rare cases, may not be able to determine a + mention was to a reply, in which case it is not ignored. + """ + + name = "mentions" + events = (Event.MESSAGE,) + extra_fields_type = ExtraMentionsSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + + # We use `msg.mentions` here as that is supplied by the api itself, to determine who was mentioned. + # Additionally, `msg.mentions` includes the user replied to, even if the mention doesn't occur in the body. + # In order to exclude users who are mentioned as a reply, we check if the msg has a reference + # + # While we could use regex to parse the message content, and get a list of + # the mentions, that solution is very prone to breaking. + # We would need to deal with codeblocks, escaping markdown, and any discrepancies between + # our implementation and discord's Markdown parser which would cause false positives or false negatives. + total_recent_mentions = 0 + for msg in relevant_messages: + # We check if the message is a reply, and if it is try to get the author + # since we ignore mentions of a user that we're replying to + reply_author = None + + if msg.type == MessageType.reply: + ref = msg.reference + + if not (resolved := ref.resolved): + # It is possible, in a very unusual situation, for a message to have a reference + # that is both not in the cache, and deleted while running this function. + # In such a situation, this will throw an error which we catch. + try: + resolved = await bot.instance.get_partial_messageable(resolved.channel_id).fetch_message( + resolved.message_id + ) + except NotFound: + log.info('Could not fetch the reference message as it has been deleted.') + + if resolved and not isinstance(resolved, DeletedReferencedMessage): + reply_author = resolved.author + + for user in msg.mentions: + # Don't count bot or self mentions, or the user being replied to (if applicable) + if user.bot or user in {msg.author, reply_author}: + continue + total_recent_mentions += 1 + + if total_recent_mentions > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_recent_mentions} mentions" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/newlines.py b/bot/exts/filtering/_filters/antispam/newlines.py new file mode 100644 index 000000000..b15a35219 --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/newlines.py @@ -0,0 +1,61 @@ +import re +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + +NEWLINES = re.compile(r"(\n+)") + + +class ExtraNewlinesSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of newlines before the filter is triggered." + consecutive_threshold_description: ClassVar[str] = ( + "Maximum number of consecutive newlines before the filter is triggered." + ) + + interval: int = 10 + threshold: int = 100 + consecutive_threshold: int = 10 + + +class NewlinesFilter(UniqueFilter): + """Detects too many newlines sent by a single user.""" + + name = "newlines" + events = (Event.MESSAGE,) + extra_fields_type = ExtraNewlinesSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + + # Identify groups of newline characters and get group & total counts + newline_counts = [] + for msg in relevant_messages: + newline_counts += [len(group) for group in NEWLINES.findall(msg.content)] + total_recent_newlines = sum(newline_counts) + # Get maximum newline group size + max_newline_group = max(newline_counts, default=0) + + # Check first for total newlines, if this passes then check for large groupings + if total_recent_newlines > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_recent_newlines} newlines" + return True + if max_newline_group > self.extra_fields.consecutive_threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {max_newline_group} consecutive newlines" + return True + return False diff --git a/bot/exts/filtering/_filters/antispam/role_mentions.py b/bot/exts/filtering/_filters/antispam/role_mentions.py new file mode 100644 index 000000000..49de642fa --- /dev/null +++ b/bot/exts/filtering/_filters/antispam/role_mentions.py @@ -0,0 +1,42 @@ +from datetime import timedelta +from itertools import takewhile +from typing import ClassVar + +import arrow +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + + +class ExtraRoleMentionsSettings(BaseModel): + """Extra settings for when to trigger the antispam rule.""" + + interval_description: ClassVar[str] = ( + "Look for rule violations in messages from the last `interval` number of seconds." + ) + threshold_description: ClassVar[str] = "Maximum number of role mentions before the filter is triggered." + + interval: int = 10 + threshold: int = 3 + + +class DuplicatesFilter(UniqueFilter): + """Detects too many role mentions sent by a single user.""" + + name = "role_mentions" + events = (Event.MESSAGE,) + extra_fields_type = ExtraRoleMentionsSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.extra_fields.interval) + relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, ctx.content)) + detected_messages = {msg for msg in relevant_messages if msg.author == ctx.author} + total_recent_mentions = sum(len(msg.role_mentions) for msg in relevant_messages) + + if total_recent_mentions > self.extra_fields.threshold: + ctx.related_messages |= detected_messages + ctx.filter_info[self] = f"sent {total_recent_mentions} role mentions" + return True + return False diff --git a/bot/exts/filtering/_filters/domain.py b/bot/exts/filtering/_filters/domain.py new file mode 100644 index 000000000..7c229fdcb --- /dev/null +++ b/bot/exts/filtering/_filters/domain.py @@ -0,0 +1,62 @@ +import re +from typing import ClassVar, Optional +from urllib.parse import urlparse + +import tldextract +from discord.ext.commands import BadArgument +from pydantic import BaseModel + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filters.filter import Filter + +URL_RE = re.compile(r"(?:https?://)?(\S+?)[\\/]*", flags=re.IGNORECASE) + + +class ExtraDomainSettings(BaseModel): + """Extra settings for how domains should be matched in a message.""" + + subdomains_description: ClassVar[str] = ( + "A boolean. If True, will will only trigger for subdomains and subpaths, and not for the domain itself." + ) + + # Whether to trigger only for subdomains and subpaths, and not the specified domain itself. + subdomains: Optional[bool] = False + + +class DomainFilter(Filter): + """ + A filter which looks for a specific domain given by URL. + + The schema (http, https) does not need to be included in the filter. + Will also match subdomains. + """ + + name = "domain" + extra_fields_type = ExtraDomainSettings + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Searches for a domain within a given context.""" + domain = tldextract.extract(self.content).registered_domain + + for found_url in ctx.content: + extract = tldextract.extract(found_url) + if self.content in found_url and extract.registered_domain == domain: + if self.extra_fields.subdomains: + if not extract.subdomain and not urlparse(f"https://{found_url}").path: + return False + ctx.matches.append(self.content) + ctx.notification_domain = self.content + return True + return False + + @classmethod + async def process_input(cls, content: str, description: str) -> tuple[str, str]: + """ + Process the content and description into a form which will work with the filtering. + + A BadArgument should be raised if the content can't be used. + """ + match = URL_RE.fullmatch(content) + if not match or not match.group(1): + raise BadArgument(f"`{content}` is not a URL.") + return match.group(1), description diff --git a/bot/exts/filtering/_filters/extension.py b/bot/exts/filtering/_filters/extension.py new file mode 100644 index 000000000..97eddc406 --- /dev/null +++ b/bot/exts/filtering/_filters/extension.py @@ -0,0 +1,27 @@ +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filters.filter import Filter + + +class ExtensionFilter(Filter): + """ + A filter which looks for a specific attachment extension in messages. + + The filter stores the extension preceded by a dot. + """ + + name = "extension" + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Searches for an attachment extension in the context content, given as a set of extensions.""" + return self.content in ctx.content + + @classmethod + async def process_input(cls, content: str, description: str) -> tuple[str, str]: + """ + Process the content and description into a form which will work with the filtering. + + A BadArgument should be raised if the content can't be used. + """ + if not content.startswith("."): + content = f".{content}" + return content, description diff --git a/bot/exts/filtering/_filters/filter.py b/bot/exts/filtering/_filters/filter.py new file mode 100644 index 000000000..b5f4c127a --- /dev/null +++ b/bot/exts/filtering/_filters/filter.py @@ -0,0 +1,94 @@ +from abc import abstractmethod +from typing import Any + +import arrow +from pydantic import ValidationError + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._settings import Defaults, create_settings +from bot.exts.filtering._utils import FieldRequiring + + +class Filter(FieldRequiring): + """ + A class representing a filter. + + Each filter looks for a specific attribute within an event (such as message sent), + and defines what action should be performed if it is triggered. + """ + + # Each subclass must define a name which will be used to fetch its description. + # Names must be unique across all types of filters. + name = FieldRequiring.MUST_SET_UNIQUE + # If a subclass uses extra fields, it should assign the pydantic model type to this variable. + extra_fields_type = None + + def __init__(self, filter_data: dict, defaults: Defaults | None = None): + self.id = filter_data["id"] + self.content = filter_data["content"] + self.description = filter_data["description"] + self.created_at = arrow.get(filter_data["created_at"]) + self.updated_at = arrow.get(filter_data["updated_at"]) + self.actions, self.validations = create_settings(filter_data["settings"], defaults=defaults) + if self.extra_fields_type: + self.extra_fields = self.extra_fields_type.parse_raw(filter_data["additional_field"] or "{}") # noqa: P103 + else: + self.extra_fields = None + + @property + def overrides(self) -> tuple[dict[str, Any], dict[str, Any]]: + """Return a tuple of setting overrides and filter setting overrides.""" + settings = {} + if self.actions: + settings = self.actions.overrides + if self.validations: + settings |= self.validations.overrides + + filter_settings = {} + if self.extra_fields: + filter_settings = self.extra_fields.dict(exclude_unset=True) + + return settings, filter_settings + + @abstractmethod + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + + @classmethod + def validate_filter_settings(cls, extra_fields: dict) -> tuple[bool, str | None]: + """Validate whether the supplied fields are valid for the filter, and provide the error message if not.""" + if cls.extra_fields_type is None: + return True, None + + try: + cls.extra_fields_type(**extra_fields) + except ValidationError as e: + return False, repr(e) + else: + return True, None + + @classmethod + async def process_input(cls, content: str, description: str) -> tuple[str, str]: + """ + Process the content and description into a form which will work with the filtering. + + A BadArgument should be raised if the content can't be used. + """ + return content, description + + def __str__(self) -> str: + """A string representation of the filter.""" + string = f"{self.id}. `{self.content}`" + if self.description: + string += f" - {self.description}" + return string + + +class UniqueFilter(Filter): + """ + Unique filters are ones that should only be run once in a given context. + + This is as opposed to say running many domain filters on the same message. + """ + + events: tuple[Event, ...] = FieldRequiring.MUST_SET diff --git a/bot/exts/filtering/_filters/invite.py b/bot/exts/filtering/_filters/invite.py new file mode 100644 index 000000000..799a302b9 --- /dev/null +++ b/bot/exts/filtering/_filters/invite.py @@ -0,0 +1,48 @@ +from discord import NotFound +from discord.ext.commands import BadArgument +from pydis_core.utils.regex import DISCORD_INVITE + +import bot +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filters.filter import Filter + + +class InviteFilter(Filter): + """ + A filter which looks for invites to a specific guild in messages. + + The filter stores the guild ID which is allowed or denied. + """ + + name = "invite" + + def __init__(self, filter_data: dict, defaults_data: dict | None = None): + super().__init__(filter_data, defaults_data) + self.content = int(self.content) + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Searches for a guild ID in the context content, given as a set of IDs.""" + return self.content in ctx.content + + @classmethod + async def process_input(cls, content: str, description: str) -> tuple[str, str]: + """ + Process the content and description into a form which will work with the filtering. + + A BadArgument should be raised if the content can't be used. + """ + match = DISCORD_INVITE.fullmatch(content) + if not match or not match.group("invite"): + raise BadArgument(f"`{content}` is not a valid Discord invite.") + invite_code = match.group("invite") + try: + invite = await bot.instance.fetch_invite(invite_code) + except NotFound: + raise BadArgument(f"`{invite_code}` is not a valid Discord invite code.") + if not invite.guild: + raise BadArgument("Did you just try to add a group DM?") + + guild_name = invite.guild.name if hasattr(invite.guild, "name") else "" + if guild_name.lower() not in description.lower(): + description = " - ".join(part for part in (f'Guild "{guild_name}"', description) if part) + return str(invite.guild.id), description diff --git a/bot/exts/filtering/_filters/token.py b/bot/exts/filtering/_filters/token.py new file mode 100644 index 000000000..3cd9b909d --- /dev/null +++ b/bot/exts/filtering/_filters/token.py @@ -0,0 +1,35 @@ +import re + +from discord.ext.commands import BadArgument + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filters.filter import Filter + + +class TokenFilter(Filter): + """A filter which looks for a specific token given by regex.""" + + name = "token" + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Searches for a regex pattern within a given context.""" + pattern = self.content + + match = re.search(pattern, ctx.content, flags=re.IGNORECASE) + if match: + ctx.matches.append(match[0]) + return True + return False + + @classmethod + async def process_input(cls, content: str, description: str) -> tuple[str, str]: + """ + Process the content and description into a form which will work with the filtering. + + A BadArgument should be raised if the content can't be used. + """ + try: + re.compile(content) + except re.error as e: + raise BadArgument(str(e)) + return content, description diff --git a/bot/exts/filtering/_filters/unique/__init__.py b/bot/exts/filtering/_filters/unique/__init__.py new file mode 100644 index 000000000..ce78d6922 --- /dev/null +++ b/bot/exts/filtering/_filters/unique/__init__.py @@ -0,0 +1,9 @@ +from os.path import dirname + +from bot.exts.filtering._filters.filter import UniqueFilter +from bot.exts.filtering._utils import subclasses_in_package + +unique_filter_types = subclasses_in_package(dirname(__file__), f"{__name__}.", UniqueFilter) +unique_filter_types = {filter_.name: filter_ for filter_ in unique_filter_types} + +__all__ = [unique_filter_types] diff --git a/bot/exts/filters/token_remover.py b/bot/exts/filtering/_filters/unique/discord_token.py index 29f80671d..6174ee30b 100644 --- a/bot/exts/filters/token_remover.py +++ b/bot/exts/filtering/_filters/unique/discord_token.py @@ -1,38 +1,34 @@ import base64 import re -import typing as t - -from discord import Colour, Message, NotFound -from discord.ext.commands import Cog - -from bot import utils -from bot.bot import Bot -from bot.constants import Channels, Colours, Event, Icons +from collections.abc import Callable, Coroutine +from typing import ClassVar, NamedTuple + +import discord +from pydantic import BaseModel, Field +from pydis_core.utils.logging import get_logger +from pydis_core.utils.members import get_or_fetch_member + +import bot +from bot import constants, utils +from bot.constants import Guild +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter +from bot.exts.filtering._utils import resolve_mention from bot.exts.moderation.modlog import ModLog -from bot.log import get_logger -from bot.utils.members import get_or_fetch_member from bot.utils.messages import format_user log = get_logger(__name__) + LOG_MESSAGE = ( - "Censored a seemingly valid token sent by {author} in {channel}, " - "token was `{user_id}.{timestamp}.{hmac}`" + "Censored a seemingly valid token sent by {author} in {channel}. " + "Token was: `{user_id}.{timestamp}.{hmac}`." ) UNKNOWN_USER_LOG_MESSAGE = "Decoded user ID: `{user_id}` (Not present in server)." KNOWN_USER_LOG_MESSAGE = ( "Decoded user ID: `{user_id}` **(Present in server)**.\n" "This matches `{user_name}` and means this is likely a valid **{kind}** token." ) -DELETION_MESSAGE_TEMPLATE = ( - "Hey {mention}! I noticed you posted a seemingly valid Discord API " - "token in your message and have removed your message. " - "This means that your token has been **compromised**. " - "Please change your token **immediately** at: " - "<https://discord.com/developers/applications>\n\n" - "Feel free to re-post it with the token removed. " - "If you believe this was a mistake, please let us know!" -) DISCORD_EPOCH = 1_420_070_400 TOKEN_EPOCH = 1_293_840_000 @@ -43,7 +39,17 @@ TOKEN_EPOCH = 1_293_840_000 TOKEN_RE = re.compile(r"([\w-]{10,})\.([\w-]{5,})\.([\w-]{10,})") -class Token(t.NamedTuple): +class ExtraDiscordTokenSettings(BaseModel): + """Extra settings for who should be pinged when a Discord token is detected.""" + + pings_for_bot_description: ClassVar[str] = "A sequence. Who should be pinged if the token found belongs to a bot." + pings_for_user_description: ClassVar[str] = "A sequence. Who should be pinged if the token found belongs to a user." + + pings_for_bot: set[str] = Field(default_factory=set) + pings_for_user: set[str] = Field(default_factory=lambda: {"Moderators"}) + + +class Token(NamedTuple): """A Discord Bot token.""" user_id: str @@ -51,84 +57,64 @@ class Token(t.NamedTuple): hmac: str -class TokenRemover(Cog): +class DiscordTokenFilter(UniqueFilter): """Scans messages for potential discord client tokens and removes them.""" - def __init__(self, bot: Bot): - self.bot = bot + name = "discord_token" + events = (Event.MESSAGE, Event.MESSAGE_EDIT) + extra_fields_type = ExtraDiscordTokenSettings @property - def mod_log(self) -> ModLog: + def mod_log(self) -> ModLog | None: """Get currently loaded ModLog cog instance.""" - return self.bot.get_cog("ModLog") - - @Cog.listener() - async def on_message(self, msg: Message) -> None: - """ - Check each message for a string that matches Discord's token pattern. + return bot.instance.get_cog("ModLog") - See: https://discordapp.com/developers/docs/reference#snowflakes - """ - # Ignore DMs; can't delete messages in there anyway. - if not msg.guild or msg.author.bot: - return - - found_token = self.find_token_in_message(msg) - if found_token: - await self.take_action(msg, found_token) - - @Cog.listener() - async def on_message_edit(self, before: Message, after: Message) -> None: - """ - Check each edit for a string that matches Discord's token pattern. - - See: https://discordapp.com/developers/docs/reference#snowflakes - """ - await self.on_message(after) - - async def take_action(self, msg: Message, found_token: Token) -> None: - """Remove the `msg` containing the `found_token` and send a mod log message.""" - self.mod_log.ignore(Event.message_delete, msg.id) - - try: - await msg.delete() - except NotFound: - log.debug(f"Failed to remove token in message {msg.id}: message already deleted.") - return - - await msg.channel.send(DELETION_MESSAGE_TEMPLATE.format(mention=msg.author.mention)) - - log_message = self.format_log_message(msg, found_token) - userid_message, mention_everyone = await self.format_userid_log_message(msg, found_token) - log.debug(log_message) - - # Send pretty mod log embed to mod-alerts - await self.mod_log.send_log_message( - icon_url=Icons.token_removed, - colour=Colour(Colours.soft_red), - title="Token removed!", - text=log_message + "\n" + userid_message, - thumbnail=msg.author.display_avatar.url, - channel_id=Channels.mod_alerts, - ping_everyone=mention_everyone, - ) + async def triggered_on(self, ctx: FilterContext) -> bool: + """Return whether the message contains Discord client tokens.""" + found_token = self.find_token_in_message(ctx.content) + if not found_token: + return False - self.bot.stats.incr("tokens.removed_tokens") + if ctx.message and (mod_log := self.mod_log): + mod_log.ignore(constants.Event.message_delete, ctx.message.id) + ctx.content = ctx.content.replace(found_token.hmac, self.censor_hmac(found_token.hmac)) + ctx.additional_actions.append(self._create_token_alert_embed_wrapper(found_token)) + return True + + def _create_token_alert_embed_wrapper(self, found_token: Token) -> Callable[[FilterContext], Coroutine]: + """Create the action to perform when an alert should be sent for a message containing a Discord token.""" + async def _create_token_alert_embed(ctx: FilterContext) -> None: + """Add an alert embed to the context with info about the token sent.""" + userid_message, is_user = await self.format_userid_log_message(found_token) + log_message = self.format_log_message(ctx.author, ctx.channel, found_token) + log.debug(log_message) + + if is_user: + mentions = map(resolve_mention, self.extra_fields.pings_for_user) + color = discord.Colour.red() + else: + mentions = map(resolve_mention, self.extra_fields.pings_for_bot) + color = discord.Colour.blue() + unmentioned = [mention for mention in mentions if mention not in ctx.alert_content] + if unmentioned: + ctx.alert_content = f"{' '.join(unmentioned)} {ctx.alert_content}" + ctx.alert_embeds.append(discord.Embed(colour=color, description=userid_message)) + + return _create_token_alert_embed @classmethod - async def format_userid_log_message(cls, msg: Message, token: Token) -> t.Tuple[str, bool]: + async def format_userid_log_message(cls, token: Token) -> tuple[str, bool]: """ Format the portion of the log message that includes details about the detected user ID. If the user is resolved to a member, the format includes the user ID, name, and the kind of user detected. - - If we resolve to a member and it is not a bot, we also return True to ping everyone. - - Returns a tuple of (log_message, mention_everyone) + If it is resolved to a user or a member, and it is not a bot, also return True. + Returns a tuple of (log_message, is_user) """ user_id = cls.extract_user_id(token.user_id) - user = await get_or_fetch_member(msg.guild, user_id) + guild = bot.instance.get_guild(Guild.id) + user = await get_or_fetch_member(guild, user_id) if user: return KNOWN_USER_LOG_MESSAGE.format( @@ -140,22 +126,27 @@ class TokenRemover(Cog): return UNKNOWN_USER_LOG_MESSAGE.format(user_id=user_id), False @staticmethod - def format_log_message(msg: Message, token: Token) -> str: + def censor_hmac(hmac: str) -> str: + """Return a censored version of the hmac.""" + return 'x' * (len(hmac) - 3) + hmac[-3:] + + @classmethod + def format_log_message(cls, author: discord.User, channel: discord.abc.GuildChannel, token: Token) -> str: """Return the generic portion of the log message to send for `token` being censored in `msg`.""" return LOG_MESSAGE.format( - author=format_user(msg.author), - channel=msg.channel.mention, + author=format_user(author), + channel=channel.mention, user_id=token.user_id, timestamp=token.timestamp, - hmac='x' * (len(token.hmac) - 3) + token.hmac[-3:], + hmac=cls.censor_hmac(token.hmac), ) @classmethod - def find_token_in_message(cls, msg: Message) -> t.Optional[Token]: - """Return a seemingly valid token found in `msg` or `None` if no token is found.""" + def find_token_in_message(cls, content: str) -> Token | None: + """Return a seemingly valid token found in `content` or `None` if no token is found.""" # Use finditer rather than search to guard against method calls prematurely returning the # token check (e.g. `message.channel.send` also matches our token pattern) - for match in TOKEN_RE.finditer(msg.content): + for match in TOKEN_RE.finditer(content): token = Token(*match.groups()) if ( (cls.extract_user_id(token.user_id) is not None) @@ -169,7 +160,7 @@ class TokenRemover(Cog): return None @staticmethod - def extract_user_id(b64_content: str) -> t.Optional[int]: + def extract_user_id(b64_content: str) -> int | None: """Return a user ID integer from part of a potential token, or None if it couldn't be decoded.""" b64_content = utils.pad_base64(b64_content) @@ -214,7 +205,7 @@ class TokenRemover(Cog): """ Determine if a given HMAC portion of a token is potentially valid. - If the HMAC has 3 or less characters, it's probably a dummy value like "xxxxxxxxxx", + If the HMAC has 3 or fewer characters, it's probably a dummy value like "xxxxxxxxxx", and thus the token can probably be skipped. """ unique = len(set(b64_content.lower())) @@ -226,8 +217,3 @@ class TokenRemover(Cog): return False else: return True - - -async def setup(bot: Bot) -> None: - """Load the TokenRemover cog.""" - await bot.add_cog(TokenRemover(bot)) diff --git a/bot/exts/filtering/_filters/unique/everyone.py b/bot/exts/filtering/_filters/unique/everyone.py new file mode 100644 index 000000000..a32e67cc5 --- /dev/null +++ b/bot/exts/filtering/_filters/unique/everyone.py @@ -0,0 +1,28 @@ +import re + +from bot.constants import Guild +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter + +EVERYONE_PING_RE = re.compile(rf"@everyone|<@&{Guild.id}>|@here") +CODE_BLOCK_RE = re.compile( + r"(?P<delim>``?)[^`]+?(?P=delim)(?!`+)" # Inline codeblock + r"|```(.+?)```", # Multiline codeblock + re.DOTALL | re.MULTILINE +) + + +class EveryoneFilter(UniqueFilter): + """Filter messages which contain `@everyone` and `@here` tags outside a codeblock.""" + + name = "everyone" + events = (Event.MESSAGE, Event.MESSAGE_EDIT) + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for the filter's content within a given context.""" + # First pass to avoid running re.sub on every message + if not EVERYONE_PING_RE.search(ctx.content): + return False + + content_without_codeblocks = CODE_BLOCK_RE.sub("", ctx.content) + return bool(EVERYONE_PING_RE.search(content_without_codeblocks)) diff --git a/bot/exts/filtering/_filters/unique/rich_embed.py b/bot/exts/filtering/_filters/unique/rich_embed.py new file mode 100644 index 000000000..2ee469f51 --- /dev/null +++ b/bot/exts/filtering/_filters/unique/rich_embed.py @@ -0,0 +1,51 @@ +import re + +from pydis_core.utils.logging import get_logger + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter +from bot.utils.helpers import remove_subdomain_from_url + +log = get_logger(__name__) + +URL_RE = re.compile(r"(https?://\S+)", flags=re.IGNORECASE) + + +class RichEmbedFilter(UniqueFilter): + """Filter messages which contain rich embeds not auto-generated from a URL.""" + + name = "rich_embed" + events = (Event.MESSAGE, Event.MESSAGE_EDIT) + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Determine if `msg` contains any rich embeds not auto-generated from a URL.""" + if ctx.embeds: + if ctx.event == Event.MESSAGE_EDIT: + if not ctx.message.edited_at: # This might happen, apparently. + return False + # If the edit delta is less than 100 microseconds, it's probably a double filter trigger. + delta = ctx.message.edited_at - (ctx.before_message.edited_at or ctx.before_message.created_at) + if delta.total_seconds() < 0.0001: + return False + + for embed in ctx.embeds: + if embed.type == "rich": + urls = URL_RE.findall(ctx.content) + final_urls = set(urls) + # This is due to the way discord renders relative urls in Embeds + # if the following url is sent: https://mobile.twitter.com/something + # Discord renders it as https://twitter.com/something + for url in urls: + final_urls.add(remove_subdomain_from_url(url)) + if not embed.url or embed.url not in final_urls: + # If `embed.url` does not exist or if `embed.url` is not part of the content + # of the message, it's unlikely to be an auto-generated embed by Discord. + ctx.alert_embeds.extend(ctx.embeds) + return True + else: + log.trace( + "Found a rich embed sent by a regular user account, " + "but it was likely just an automatic URL embed." + ) + + return False diff --git a/bot/exts/filtering/_filters/unique/webhook.py b/bot/exts/filtering/_filters/unique/webhook.py new file mode 100644 index 000000000..965ef42eb --- /dev/null +++ b/bot/exts/filtering/_filters/unique/webhook.py @@ -0,0 +1,63 @@ +import re +from collections.abc import Callable, Coroutine + +from pydis_core.utils.logging import get_logger + +import bot +from bot import constants +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.filter import UniqueFilter +from bot.exts.moderation.modlog import ModLog + +log = get_logger(__name__) + + +WEBHOOK_URL_RE = re.compile( + r"((?:https?://)?(?:ptb\.|canary\.)?discord(?:app)?\.com/api/webhooks/\d+/)\S+/?", + re.IGNORECASE +) + + +class WebhookFilter(UniqueFilter): + """Scan messages to detect Discord webhooks links.""" + + name = "webhook" + events = (Event.MESSAGE, Event.MESSAGE_EDIT) + + @property + def mod_log(self) -> ModLog | None: + """Get current instance of `ModLog`.""" + return bot.instance.get_cog("ModLog") + + async def triggered_on(self, ctx: FilterContext) -> bool: + """Search for a webhook in the given content. If found, attempt to delete it.""" + matches = set(WEBHOOK_URL_RE.finditer(ctx.content)) + if not matches: + return False + + # Don't log this. + if ctx.message and (mod_log := self.mod_log): + mod_log.ignore(constants.Event.message_delete, ctx.message.id) + + for i, match in enumerate(matches, start=1): + extra = "" if len(matches) == 1 else f" ({i})" + # Queue the webhook for deletion. + ctx.additional_actions.append(self._delete_webhook_wrapper(match[0], extra)) + # Don't show the full webhook in places such as the mod alert. + ctx.content = ctx.content.replace(match[0], match[1] + "xxx") + + return True + + @staticmethod + def _delete_webhook_wrapper(webhook_url: str, extra_message: str) -> Callable[[FilterContext], Coroutine]: + """Create the action to perform when a webhook should be deleted.""" + async def _delete_webhook(ctx: FilterContext) -> None: + """Delete the given webhook and update the filter context.""" + async with bot.instance.http_session.delete(webhook_url) as resp: + # The Discord API Returns a 204 NO CONTENT response on success. + if resp.status == 204: + ctx.action_descriptions.append("webhook deleted" + extra_message) + else: + ctx.action_descriptions.append("failed to delete webhook" + extra_message) + + return _delete_webhook diff --git a/bot/exts/filtering/_settings.py b/bot/exts/filtering/_settings.py new file mode 100644 index 000000000..75e810df5 --- /dev/null +++ b/bot/exts/filtering/_settings.py @@ -0,0 +1,233 @@ +from __future__ import annotations + +import operator +import traceback +from abc import abstractmethod +from copy import copy +from functools import reduce +from typing import Any, NamedTuple, Optional, TypeVar + +from typing_extensions import Self + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types import settings_types +from bot.exts.filtering._settings_types.settings_entry import ActionEntry, SettingsEntry, ValidationEntry +from bot.exts.filtering._utils import FieldRequiring +from bot.log import get_logger + +TSettings = TypeVar("TSettings", bound="Settings") + +log = get_logger(__name__) + +_already_warned: set[str] = set() + +T = TypeVar("T", bound=SettingsEntry) + + +def create_settings( + settings_data: dict, *, defaults: Defaults | None = None, keep_empty: bool = False +) -> tuple[Optional[ActionSettings], Optional[ValidationSettings]]: + """ + Create and return instances of the Settings subclasses from the given data. + + Additionally, warn for data entries with no matching class. + + In case these are setting overrides, the defaults can be provided to keep track of the correct values. + """ + action_data = {} + validation_data = {} + for entry_name, entry_data in settings_data.items(): + if entry_name in settings_types["ActionEntry"]: + action_data[entry_name] = entry_data + elif entry_name in settings_types["ValidationEntry"]: + validation_data[entry_name] = entry_data + elif entry_name not in _already_warned: + log.warning( + f"A setting named {entry_name} was loaded from the database, but no matching class." + ) + _already_warned.add(entry_name) + if defaults is None: + default_actions = None + default_validations = None + else: + default_actions, default_validations = defaults + return ( + ActionSettings.create(action_data, defaults=default_actions, keep_empty=keep_empty), + ValidationSettings.create(validation_data, defaults=default_validations, keep_empty=keep_empty) + ) + + +class Settings(FieldRequiring, dict[str, T]): + """ + A collection of settings. + + For processing the settings parts in the database and evaluating them on given contexts. + + Each filter list and filter has its own settings. + + A filter doesn't have to have its own settings. For every undefined setting, it falls back to the value defined in + the filter list which contains the filter. + """ + + entry_type = T + + _already_warned: set[str] = set() + + @abstractmethod + def __init__(self, settings_data: dict, *, defaults: Settings | None = None, keep_empty: bool = False): + super().__init__() + + entry_classes = settings_types.get(self.entry_type.__name__) + for entry_name, entry_data in settings_data.items(): + try: + entry_cls = entry_classes[entry_name] + except KeyError: + if entry_name not in self._already_warned: + log.warning( + f"A setting named {entry_name} was loaded from the database, " + f"but no matching {self.entry_type.__name__} class." + ) + self._already_warned.add(entry_name) + else: + try: + entry_defaults = None if defaults is None else defaults[entry_name] + new_entry = entry_cls.create( + entry_data, defaults=entry_defaults, keep_empty=keep_empty + ) + if new_entry: + self[entry_name] = new_entry + except TypeError as e: + raise TypeError( + f"Attempted to load a {entry_name} setting, but the response is malformed: {entry_data}" + ) from e + + @property + def overrides(self) -> dict[str, Any]: + """Return a dictionary of overrides across all entries.""" + return reduce(operator.or_, (entry.overrides for entry in self.values() if entry), {}) + + def copy(self: TSettings) -> TSettings: + """Create a shallow copy of the object.""" + return copy(self) + + def get_setting(self, key: str, default: Optional[Any] = None) -> Any: + """Get the setting matching the key, or fall back to the default value if the key is missing.""" + for entry in self.values(): + if hasattr(entry, key): + return getattr(entry, key) + return default + + @classmethod + def create( + cls, settings_data: dict, *, defaults: Settings | None = None, keep_empty: bool = False + ) -> Optional[Settings]: + """ + Returns a Settings object from `settings_data` if it holds any value, None otherwise. + + Use this method to create Settings objects instead of the init. + The None value is significant for how a filter list iterates over its filters. + """ + settings = cls(settings_data, defaults=defaults, keep_empty=keep_empty) + # If an entry doesn't hold any values, its `create` method will return None. + # If all entries are None, then the settings object holds no values. + if not keep_empty and not any(settings.values()): + return None + + return settings + + +class ValidationSettings(Settings[ValidationEntry]): + """ + A collection of validation settings. + + A filter is triggered only if all of its validation settings (e.g whether to invoke in DM) approve + (the check returns True). + """ + + entry_type = ValidationEntry + + def __init__(self, settings_data: dict, *, defaults: Settings | None = None, keep_empty: bool = False): + super().__init__(settings_data, defaults=defaults, keep_empty=keep_empty) + + def evaluate(self, ctx: FilterContext) -> tuple[set[str], set[str]]: + """Evaluates for each setting whether the context is relevant to the filter.""" + passed = set() + failed = set() + + for name, validation in self.items(): + if validation: + if validation.triggers_on(ctx): + passed.add(name) + else: + failed.add(name) + + return passed, failed + + +class ActionSettings(Settings[ActionEntry]): + """ + A collection of action settings. + + If a filter is triggered, its action settings (e.g how to infract the user) are combined with the action settings of + other triggered filters in the same event, and action is taken according to the combined action settings. + """ + + entry_type = ActionEntry + + def __init__(self, settings_data: dict, *, defaults: Settings | None = None, keep_empty: bool = False): + super().__init__(settings_data, defaults=defaults, keep_empty=keep_empty) + + def union(self, other: Self) -> Self: + """Combine the entries of two collections of settings into a new ActionsSettings.""" + actions = {} + # A settings object doesn't necessarily have all types of entries (e.g in the case of filter overrides). + for entry in self: + if entry in other: + actions[entry] = self[entry].union(other[entry]) + else: + actions[entry] = self[entry] + for entry in other: + if entry not in actions: + actions[entry] = other[entry] + + result = ActionSettings({}) + result.update(actions) + return result + + async def action(self, ctx: FilterContext) -> None: + """Execute the action of every action entry stored, as well as any additional actions in the context.""" + for entry in self.values(): + try: + await entry.action(ctx) + # Filtering should not stop even if one type of action raised an exception. + # For example, if deleting the message raised somehow, it should still try to infract the user. + except Exception: + log.exception(traceback.format_exc()) + + for action in ctx.additional_actions: + try: + await action(ctx) + except Exception: + log.exception(traceback.format_exc()) + + def fallback_to(self, fallback: ActionSettings) -> ActionSettings: + """Fill in missing entries from `fallback`.""" + new_actions = self.copy() + for entry_name, entry_value in fallback.items(): + if entry_name not in self: + new_actions[entry_name] = entry_value + return new_actions + + +class Defaults(NamedTuple): + """Represents an atomic list's default settings.""" + + actions: ActionSettings + validations: ValidationSettings + + def dict(self) -> dict[str, Any]: + """Return a dict representation of the stored fields across all entries.""" + dict_ = {} + for settings in self: + dict_ = reduce(operator.or_, (entry.dict() for entry in settings.values()), dict_) + return dict_ diff --git a/bot/exts/filtering/_settings_types/__init__.py b/bot/exts/filtering/_settings_types/__init__.py new file mode 100644 index 000000000..61b5737d4 --- /dev/null +++ b/bot/exts/filtering/_settings_types/__init__.py @@ -0,0 +1,9 @@ +from bot.exts.filtering._settings_types.actions import action_types +from bot.exts.filtering._settings_types.validations import validation_types + +settings_types = { + "ActionEntry": {settings_type.name: settings_type for settings_type in action_types}, + "ValidationEntry": {settings_type.name: settings_type for settings_type in validation_types} +} + +__all__ = [settings_types] diff --git a/bot/exts/filtering/_settings_types/actions/__init__.py b/bot/exts/filtering/_settings_types/actions/__init__.py new file mode 100644 index 000000000..a8175b976 --- /dev/null +++ b/bot/exts/filtering/_settings_types/actions/__init__.py @@ -0,0 +1,8 @@ +from os.path import dirname + +from bot.exts.filtering._settings_types.settings_entry import ActionEntry +from bot.exts.filtering._utils import subclasses_in_package + +action_types = subclasses_in_package(dirname(__file__), f"{__name__}.", ActionEntry) + +__all__ = [action_types] diff --git a/bot/exts/filtering/_settings_types/actions/infraction_and_notification.py b/bot/exts/filtering/_settings_types/actions/infraction_and_notification.py new file mode 100644 index 000000000..5ae4901b6 --- /dev/null +++ b/bot/exts/filtering/_settings_types/actions/infraction_and_notification.py @@ -0,0 +1,204 @@ +from datetime import timedelta +from enum import Enum, auto +from typing import ClassVar + +import arrow +import discord.abc +from discord import Colour, Embed, Member, User +from discord.errors import Forbidden +from pydantic import validator +from pydis_core.utils.logging import get_logger +from pydis_core.utils.members import get_or_fetch_member +from typing_extensions import Self + +import bot as bot_module +from bot.constants import Channels +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ActionEntry +from bot.exts.filtering._utils import FakeContext + +log = get_logger(__name__) + +passive_form = { + "BAN": "banned", + "KICK": "kicked", + "TIMEOUT": "timed out", + "VOICE_MUTE": "voice muted", + "SUPERSTAR": "superstarred", + "WARNING": "warned", + "WATCH": "watch", + "NOTE": "noted", +} + + +class Infraction(Enum): + """An enumeration of infraction types. The lower the value, the higher it is on the hierarchy.""" + + BAN = auto() + KICK = auto() + TIMEOUT = auto() + VOICE_MUTE = auto() + SUPERSTAR = auto() + WARNING = auto() + WATCH = auto() + NOTE = auto() + NONE = auto() + + def __str__(self) -> str: + return self.name + + async def invoke( + self, + user: Member | User, + message: discord.Message, + channel: discord.abc.GuildChannel | discord.DMChannel, + alerts_channel: discord.TextChannel, + duration: float, + reason: str + ) -> None: + """Invokes the command matching the infraction name.""" + command_name = self.name.lower() + command = bot_module.instance.get_command(command_name) + if not command: + await alerts_channel.send(f":warning: Could not apply {command_name} to {user.mention}: command not found.") + log.warning(f":warning: Could not apply {command_name} to {user.mention}: command not found.") + return + + if isinstance(user, discord.User): # For example because a message was sent in a DM. + member = await get_or_fetch_member(channel.guild, user.id) + if member: + user = member + ctx = FakeContext(message, channel, command) + if self.name in ("KICK", "WARNING", "WATCH", "NOTE"): + await command(ctx, user, reason=reason or None) + else: + duration = arrow.utcnow() + timedelta(seconds=duration) if duration else None + await command(ctx, user, duration, reason=reason or None) + + +class InfractionAndNotification(ActionEntry): + """ + A setting entry which specifies what infraction to issue and the notification to DM the user. + + Since a DM cannot be sent when a user is banned or kicked, these two functions need to be grouped together. + """ + + name: ClassVar[str] = "infraction_and_notification" + description: ClassVar[dict[str, str]] = { + "infraction_type": ( + "The type of infraction to issue when the filter triggers, or 'NONE'. " + "If two infractions are triggered for the same message, " + "the harsher one will be applied (by type or duration).\n\n" + "Valid infraction types in order of harshness: " + ) + ", ".join(infraction.name for infraction in Infraction), + "infraction_duration": "How long the infraction should last for in seconds. 0 for permanent.", + "infraction_reason": "The reason delivered with the infraction.", + "infraction_channel": ( + "The channel ID in which to invoke the infraction (and send the confirmation message). " + "If 0, the infraction will be sent in the context channel. If the ID otherwise fails to resolve, " + "it will default to the mod-alerts channel." + ), + "dm_content": "The contents of a message to be DMed to the offending user.", + "dm_embed": "The contents of the embed to be DMed to the offending user." + } + + dm_content: str + dm_embed: str + infraction_type: Infraction + infraction_reason: str + infraction_duration: float + infraction_channel: int + + @validator("infraction_type", pre=True) + @classmethod + def convert_infraction_name(cls, infr_type: str | Infraction) -> Infraction: + """Convert the string to an Infraction by name.""" + if isinstance(infr_type, Infraction): + return infr_type + return Infraction[infr_type.replace(" ", "_").upper()] + + async def action(self, ctx: FilterContext) -> None: + """Send the notification to the user, and apply any specified infractions.""" + # If there is no infraction to apply, any DM contents already provided in the context take precedence. + if self.infraction_type == Infraction.NONE and (ctx.dm_content or ctx.dm_embed): + dm_content = ctx.dm_content + dm_embed = ctx.dm_embed + else: + dm_content = self.dm_content + dm_embed = self.dm_embed + + if dm_content or dm_embed: + formatting = {"domain": ctx.notification_domain} + dm_content = f"Hey {ctx.author.mention}!\n{dm_content.format(**formatting)}" + if dm_embed: + dm_embed = Embed(description=dm_embed.format(**formatting), colour=Colour.og_blurple()) + else: + dm_embed = None + + try: + await ctx.author.send(dm_content, embed=dm_embed) + ctx.action_descriptions.append("notified") + except Forbidden: + ctx.action_descriptions.append("failed to notify") + + if self.infraction_type != Infraction.NONE: + alerts_channel = bot_module.instance.get_channel(Channels.mod_alerts) + if self.infraction_channel: + channel = bot_module.instance.get_channel(self.infraction_channel) + if not channel: + log.info(f"Could not find a channel with ID {self.infraction_channel}, infracting in mod-alerts.") + channel = alerts_channel + elif not ctx.channel: + channel = alerts_channel + else: + channel = ctx.channel + if not channel: # If somehow it's set to `alerts_channel` and it can't be found. + log.error(f"Unable to apply infraction as the context channel {channel} can't be found.") + return + + await self.infraction_type.invoke( + ctx.author, ctx.message, channel, alerts_channel, self.infraction_duration, self.infraction_reason + ) + ctx.action_descriptions.append(passive_form[self.infraction_type.name]) + + def union(self, other: Self) -> Self: + """ + Combines two actions of the same type. Each type of action is executed once per filter. + + If the infractions are different, take the data of the one higher up the hierarchy. + + There is no clear way to properly combine several notification messages, especially when it's in two parts. + To avoid bombarding the user with several notifications, the message with the more significant infraction + is used. If the more significant infraction has no accompanying message, use the one from the other infraction, + if it exists. + """ + # Lower number -> higher in the hierarchy + if self.infraction_type is None: + return other.copy() + elif other.infraction_type is None: + return self.copy() + + if self.infraction_type.value < other.infraction_type.value: + result = self.copy() + elif self.infraction_type.value > other.infraction_type.value: + result = other.copy() + other = self + else: + if self.infraction_duration is None or ( + other.infraction_duration is not None and self.infraction_duration > other.infraction_duration + ): + result = self.copy() + else: + result = other.copy() + other = self + + # If the winner has no message but the loser does, copy the message to the winner. + result_overrides = result.overrides + if "dm_content" not in result_overrides and "dm_embed" not in result_overrides: + other_overrides = other.overrides + if "dm_content" in other_overrides: + result.dm_content = other_overrides["dm_content"] + if "dm_embed" in other_overrides: + result.dm_content = other_overrides["dm_embed"] + + return result diff --git a/bot/exts/filtering/_settings_types/actions/ping.py b/bot/exts/filtering/_settings_types/actions/ping.py new file mode 100644 index 000000000..ee40c54fe --- /dev/null +++ b/bot/exts/filtering/_settings_types/actions/ping.py @@ -0,0 +1,45 @@ +from typing import ClassVar + +from pydantic import validator +from typing_extensions import Self + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ActionEntry +from bot.exts.filtering._utils import resolve_mention + + +class Ping(ActionEntry): + """A setting entry which adds the appropriate pings to the alert.""" + + name: ClassVar[str] = "mentions" + description: ClassVar[dict[str, str]] = { + "guild_pings": ( + "A list of role IDs/role names/user IDs/user names/here/everyone. " + "If a mod-alert is generated for a filter triggered in a public channel, these will be pinged." + ), + "dm_pings": ( + "A list of role IDs/role names/user IDs/user names/here/everyone. " + "If a mod-alert is generated for a filter triggered in DMs, these will be pinged." + ) + } + + guild_pings: set[str] + dm_pings: set[str] + + @validator("*", pre=True) + @classmethod + def init_sequence_if_none(cls, pings: list[str] | None) -> list[str]: + """Initialize an empty sequence if the value is None.""" + if pings is None: + return [] + return pings + + async def action(self, ctx: FilterContext) -> None: + """Add the stored pings to the alert message content.""" + mentions = self.guild_pings if not ctx.channel or ctx.channel.guild else self.dm_pings + new_content = " ".join([resolve_mention(mention) for mention in mentions]) + ctx.alert_content = f"{new_content} {ctx.alert_content}" + + def union(self, other: Self) -> Self: + """Combines two actions of the same type. Each type of action is executed once per filter.""" + return Ping(guild_pings=self.guild_pings | other.guild_pings, dm_pings=self.dm_pings | other.dm_pings) diff --git a/bot/exts/filtering/_settings_types/actions/remove_context.py b/bot/exts/filtering/_settings_types/actions/remove_context.py new file mode 100644 index 000000000..7ead88818 --- /dev/null +++ b/bot/exts/filtering/_settings_types/actions/remove_context.py @@ -0,0 +1,113 @@ +from collections import defaultdict +from typing import ClassVar + +from discord import Message +from discord.errors import HTTPException +from pydis_core.utils import scheduling +from pydis_core.utils.logging import get_logger +from typing_extensions import Self + +import bot +from bot.constants import Channels +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._settings_types.settings_entry import ActionEntry +from bot.exts.filtering._utils import FakeContext +from bot.utils.messages import send_attachments + +log = get_logger(__name__) + +SUPERSTAR_REASON = ( + "Your nickname was found to be in violation of our code of conduct. " + "If you believe this is a mistake, please let us know." +) + + +async def upload_messages_attachments(ctx: FilterContext, messages: list[Message]) -> None: + """Re-upload the messages' attachments for future logging.""" + if not messages: + return + destination = messages[0].guild.get_channel(Channels.attachment_log) + for message in messages: + if message.attachments and message.id not in ctx.attachments: + ctx.attachments[message.id] = await send_attachments(message, destination, link_large=False) + + +class RemoveContext(ActionEntry): + """A setting entry which tells whether to delete the offending message(s).""" + + name: ClassVar[str] = "remove_context" + description: ClassVar[str] = ( + "A boolean field. If True, the filter being triggered will cause the offending context to be removed. " + "An offending message will be deleted, while an offending nickname will be superstarified." + ) + + remove_context: bool + + async def action(self, ctx: FilterContext) -> None: + """Remove the offending context.""" + if not self.remove_context: + return + + if ctx.event in (Event.MESSAGE, Event.MESSAGE_EDIT): + await self._handle_messages(ctx) + elif ctx.event == Event.NICKNAME: + await self._handle_nickname(ctx) + + @staticmethod + async def _handle_messages(ctx: FilterContext) -> None: + """Delete any messages involved in this context.""" + if not ctx.message or not ctx.message.guild: + return + + # If deletion somehow fails at least this will allow scheduling for deletion. + ctx.messages_deletion = True + channel_messages = defaultdict(set) # Duplicates will cause batch deletion to fail. + for message in {ctx.message} | ctx.related_messages: + channel_messages[message.channel].add(message) + + success = fail = 0 + deleted = list() + for channel, messages in channel_messages.items(): + try: + await channel.delete_messages(messages) + except HTTPException: + fail += len(messages) + else: + success += len(messages) + deleted.extend(messages) + scheduling.create_task(upload_messages_attachments(ctx, deleted)) + + if not fail: + if success == 1: + ctx.action_descriptions.append("deleted") + else: + ctx.action_descriptions.append("deleted all") + elif not success: + if fail == 1: + ctx.action_descriptions.append("failed to delete") + else: + ctx.action_descriptions.append("all failed to delete") + else: + ctx.action_descriptions.append(f"{success} deleted, {fail} failed to delete") + + @staticmethod + async def _handle_nickname(ctx: FilterContext) -> None: + """Apply a superstar infraction to remove the user's nickname.""" + alerts_channel = bot.instance.get_channel(Channels.mod_alerts) + if not alerts_channel: + log.error(f"Unable to apply superstar as the context channel {alerts_channel} can't be found.") + return + command = bot.instance.get_command("superstar") + if not command: + user = ctx.author + await alerts_channel.send(f":warning: Could not apply superstar to {user.mention}: command not found.") + log.warning(f":warning: Could not apply superstar to {user.mention}: command not found.") + ctx.action_descriptions.append("failed to superstar") + return + + await command(FakeContext(ctx.message, alerts_channel, command), ctx.author, None, reason=SUPERSTAR_REASON) + ctx.action_descriptions.append("superstar") + + def union(self, other: Self) -> Self: + """Combines two actions of the same type. Each type of action is executed once per filter.""" + return RemoveContext(remove_context=self.remove_context or other.remove_context) diff --git a/bot/exts/filtering/_settings_types/actions/send_alert.py b/bot/exts/filtering/_settings_types/actions/send_alert.py new file mode 100644 index 000000000..f554cdd4d --- /dev/null +++ b/bot/exts/filtering/_settings_types/actions/send_alert.py @@ -0,0 +1,23 @@ +from typing import ClassVar + +from typing_extensions import Self + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ActionEntry + + +class SendAlert(ActionEntry): + """A setting entry which tells whether to send an alert message.""" + + name: ClassVar[str] = "send_alert" + description: ClassVar[str] = "A boolean. If all filters triggered set this to False, no mod-alert will be created." + + send_alert: bool + + async def action(self, ctx: FilterContext) -> None: + """Add the stored pings to the alert message content.""" + ctx.send_alert = self.send_alert + + def union(self, other: Self) -> Self: + """Combines two actions of the same type. Each type of action is executed once per filter.""" + return SendAlert(send_alert=self.send_alert or other.send_alert) diff --git a/bot/exts/filtering/_settings_types/settings_entry.py b/bot/exts/filtering/_settings_types/settings_entry.py new file mode 100644 index 000000000..e41ef5c7a --- /dev/null +++ b/bot/exts/filtering/_settings_types/settings_entry.py @@ -0,0 +1,90 @@ +from __future__ import annotations + +from abc import abstractmethod +from typing import Any, ClassVar, Union + +from pydantic import BaseModel, PrivateAttr +from typing_extensions import Self + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._utils import FieldRequiring + + +class SettingsEntry(BaseModel, FieldRequiring): + """ + A basic entry in the settings field appearing in every filter list and filter. + + For a filter list, this is the default setting for it. For a filter, it's an override of the default entry. + """ + + # Each subclass must define a name matching the entry name we're expecting to receive from the database. + # Names must be unique across all filter lists. + name: ClassVar[str] = FieldRequiring.MUST_SET_UNIQUE + # Each subclass must define a description of what it does. If the data an entry type receives comprises + # several DB fields, the value should a dictionary of field names and their descriptions. + description: ClassVar[Union[str, dict[str, str]]] = FieldRequiring.MUST_SET + + _overrides: set[str] = PrivateAttr(default_factory=set) + + def __init__(self, defaults: SettingsEntry | None = None, /, **data): + overrides = set() + if defaults: + defaults_dict = defaults.dict() + for field_name, field_value in list(data.items()): + if field_value is None: + data[field_name] = defaults_dict[field_name] + else: + overrides.add(field_name) + super().__init__(**data) + self._overrides |= overrides + + @property + def overrides(self) -> dict[str, Any]: + """Return a dictionary of overrides.""" + return {name: getattr(self, name) for name in self._overrides} + + @classmethod + def create( + cls, entry_data: dict[str, Any] | None, *, defaults: SettingsEntry | None = None, keep_empty: bool = False + ) -> SettingsEntry | None: + """ + Returns a SettingsEntry object from `entry_data` if it holds any value, None otherwise. + + Use this method to create SettingsEntry objects instead of the init. + The None value is significant for how a filter list iterates over its filters. + """ + if entry_data is None: + return None + if not keep_empty and hasattr(entry_data, "values") and all(value is None for value in entry_data.values()): + return None + + if not isinstance(entry_data, dict): + entry_data = {cls.name: entry_data} + return cls(defaults, **entry_data) + + +class ValidationEntry(SettingsEntry): + """A setting entry to validate whether the filter should be triggered in the given context.""" + + @abstractmethod + def triggers_on(self, ctx: FilterContext) -> bool: + """Return whether the filter should be triggered with this setting in the given context.""" + ... + + +class ActionEntry(SettingsEntry): + """A setting entry defining what the bot should do if the filter it belongs to is triggered.""" + + @abstractmethod + async def action(self, ctx: FilterContext) -> None: + """Execute an action that should be taken when the filter this setting belongs to is triggered.""" + ... + + @abstractmethod + def union(self, other: Self) -> Self: + """ + Combine two actions of the same type. Each type of action is executed once per filter. + + The following condition must hold: if self == other, then self | other == self. + """ + ... diff --git a/bot/exts/filtering/_settings_types/validations/__init__.py b/bot/exts/filtering/_settings_types/validations/__init__.py new file mode 100644 index 000000000..5c44e8b27 --- /dev/null +++ b/bot/exts/filtering/_settings_types/validations/__init__.py @@ -0,0 +1,8 @@ +from os.path import dirname + +from bot.exts.filtering._settings_types.settings_entry import ValidationEntry +from bot.exts.filtering._utils import subclasses_in_package + +validation_types = subclasses_in_package(dirname(__file__), f"{__name__}.", ValidationEntry) + +__all__ = [validation_types] diff --git a/bot/exts/filtering/_settings_types/validations/bypass_roles.py b/bot/exts/filtering/_settings_types/validations/bypass_roles.py new file mode 100644 index 000000000..d42e6407c --- /dev/null +++ b/bot/exts/filtering/_settings_types/validations/bypass_roles.py @@ -0,0 +1,24 @@ +from typing import ClassVar, Union + +from discord import Member + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ValidationEntry + + +class RoleBypass(ValidationEntry): + """A setting entry which tells whether the roles the member has allow them to bypass the filter.""" + + name: ClassVar[str] = "bypass_roles" + description: ClassVar[str] = "A list of role IDs or role names. Users with these roles will not trigger the filter." + + bypass_roles: set[Union[int, str]] + + def triggers_on(self, ctx: FilterContext) -> bool: + """Return whether the filter should be triggered on this user given their roles.""" + if not isinstance(ctx.author, Member): + return True + return all( + member_role.id not in self.bypass_roles and member_role.name not in self.bypass_roles + for member_role in ctx.author.roles + ) diff --git a/bot/exts/filtering/_settings_types/validations/channel_scope.py b/bot/exts/filtering/_settings_types/validations/channel_scope.py new file mode 100644 index 000000000..d37efaa09 --- /dev/null +++ b/bot/exts/filtering/_settings_types/validations/channel_scope.py @@ -0,0 +1,70 @@ +from typing import ClassVar, Union + +from pydantic import validator + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ValidationEntry + + +class ChannelScope(ValidationEntry): + """A setting entry which tells whether the filter was invoked in a whitelisted channel or category.""" + + name: ClassVar[str] = "channel_scope" + description: ClassVar[str] = { + "disabled_channels": ( + "A list of channel IDs or channel names. " + "The filter will not trigger in these channels even if the category is expressly enabled." + ), + "disabled_categories": ( + "A list of category IDs or category names. The filter will not trigger in these categories." + ), + "enabled_channels": ( + "A list of channel IDs or channel names. " + "The filter can trigger in these channels even if the category is disabled or not expressly enabled." + ), + "enabled_categories": ( + "A list of category IDs or category names. " + "If the list is not empty, filters will trigger only in channels of these categories, " + "unless the channel is expressly disabled." + ) + } + + disabled_channels: set[Union[int, str]] + disabled_categories: set[Union[int, str]] + enabled_channels: set[Union[int, str]] + enabled_categories: set[Union[int, str]] + + @validator("*", pre=True) + @classmethod + def init_if_sequence_none(cls, sequence: list[str] | None) -> list[str]: + """Initialize an empty sequence if the value is None.""" + if sequence is None: + return [] + return sequence + + def triggers_on(self, ctx: FilterContext) -> bool: + """ + Return whether the filter should be triggered in the given channel. + + The filter is invoked by default. + If the channel is explicitly enabled, it bypasses the set disabled channels and categories. + """ + channel = ctx.channel + + if not channel: + return True + if not hasattr(channel, "category"): # This is not a guild channel, outside the scope of this setting. + return True + if hasattr(channel, "parent"): + channel = channel.parent + + enabled_channel = channel.id in self.enabled_channels or channel.name in self.enabled_channels + disabled_channel = channel.id in self.disabled_channels or channel.name in self.disabled_channels + enabled_category = channel.category and (not self.enabled_categories or ( + channel.category.id in self.enabled_categories or channel.category.name in self.enabled_categories + )) + disabled_category = channel.category and ( + channel.category.id in self.disabled_categories or channel.category.name in self.disabled_categories + ) + + return enabled_channel or (enabled_category and not disabled_channel and not disabled_category) diff --git a/bot/exts/filtering/_settings_types/validations/enabled.py b/bot/exts/filtering/_settings_types/validations/enabled.py new file mode 100644 index 000000000..3b5e3e446 --- /dev/null +++ b/bot/exts/filtering/_settings_types/validations/enabled.py @@ -0,0 +1,19 @@ +from typing import ClassVar + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ValidationEntry + + +class Enabled(ValidationEntry): + """A setting entry which tells whether the filter is enabled.""" + + name: ClassVar[str] = "enabled" + description: ClassVar[str] = ( + "A boolean field. Setting it to False allows disabling the filter without deleting it entirely." + ) + + enabled: bool + + def triggers_on(self, ctx: FilterContext) -> bool: + """Return whether the filter is enabled.""" + return self.enabled diff --git a/bot/exts/filtering/_settings_types/validations/filter_dm.py b/bot/exts/filtering/_settings_types/validations/filter_dm.py new file mode 100644 index 000000000..9961984d6 --- /dev/null +++ b/bot/exts/filtering/_settings_types/validations/filter_dm.py @@ -0,0 +1,20 @@ +from typing import ClassVar + +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._settings_types.settings_entry import ValidationEntry + + +class FilterDM(ValidationEntry): + """A setting entry which tells whether to apply the filter to DMs.""" + + name: ClassVar[str] = "filter_dm" + description: ClassVar[str] = "A boolean field. If True, the filter can trigger for messages sent to the bot in DMs." + + filter_dm: bool + + def triggers_on(self, ctx: FilterContext) -> bool: + """Return whether the filter should be triggered even if it was triggered in DMs.""" + if not ctx.channel: # No channel - out of scope for this setting. + return True + + return ctx.channel.guild is not None or self.filter_dm diff --git a/bot/exts/filtering/_ui/__init__.py b/bot/exts/filtering/_ui/__init__.py new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/bot/exts/filtering/_ui/__init__.py diff --git a/bot/exts/filtering/_ui/filter.py b/bot/exts/filtering/_ui/filter.py new file mode 100644 index 000000000..1ef25f17a --- /dev/null +++ b/bot/exts/filtering/_ui/filter.py @@ -0,0 +1,464 @@ +from __future__ import annotations + +from typing import Any, Callable + +import discord +import discord.ui +from discord import Embed, Interaction, User +from discord.ext.commands import BadArgument +from discord.ui.select import SelectOption +from pydis_core.site_api import ResponseCodeError + +from bot.exts.filtering._filter_lists.filter_list import FilterList, ListType +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._ui.ui import ( + COMPONENT_TIMEOUT, CustomCallbackSelect, EditBaseView, MAX_EMBED_DESCRIPTION, MISSING, SETTINGS_DELIMITER, + SINGLE_SETTING_PATTERN, format_response_error, parse_value, populate_embed_from_dict +) +from bot.exts.filtering._utils import repr_equals, to_serializable +from bot.log import get_logger + +log = get_logger(__name__) + + +def build_filter_repr_dict( + filter_list: FilterList, + list_type: ListType, + filter_type: type[Filter], + settings_overrides: dict, + extra_fields_overrides: dict +) -> dict: + """Build a dictionary of field names and values to pass to `populate_embed_from_dict`.""" + # Get filter list settings + default_setting_values = {} + for settings_group in filter_list[list_type].defaults: + for _, setting in settings_group.items(): + default_setting_values.update(to_serializable(setting.dict())) + + # Add overrides. It's done in this way to preserve field order, since the filter won't have all settings. + total_values = {} + for name, value in default_setting_values.items(): + if name not in settings_overrides or repr_equals(settings_overrides[name], value): + total_values[name] = value + else: + total_values[f"{name}*"] = settings_overrides[name] + + # Add the filter-specific settings. + if filter_type.extra_fields_type: + # This iterates over the default values of the extra fields model. + for name, value in filter_type.extra_fields_type().dict().items(): + if name not in extra_fields_overrides or repr_equals(extra_fields_overrides[name], value): + total_values[f"{filter_type.name}/{name}"] = value + else: + total_values[f"{filter_type.name}/{name}*"] = extra_fields_overrides[name] + + return total_values + + +class EditContentModal(discord.ui.Modal, title="Edit Content"): + """A modal to input a filter's content.""" + + content = discord.ui.TextInput(label="Content") + + def __init__(self, embed_view: FilterEditView, message: discord.Message): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.embed_view = embed_view + self.message = message + + async def on_submit(self, interaction: Interaction) -> None: + """Update the embed with the new content.""" + await interaction.response.defer() + await self.embed_view.update_embed(self.message, content=self.content.value) + + +class EditDescriptionModal(discord.ui.Modal, title="Edit Description"): + """A modal to input a filter's description.""" + + description = discord.ui.TextInput(label="Description") + + def __init__(self, embed_view: FilterEditView, message: discord.Message): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.embed_view = embed_view + self.message = message + + async def on_submit(self, interaction: Interaction) -> None: + """Update the embed with the new description.""" + await interaction.response.defer() + await self.embed_view.update_embed(self.message, description=self.description.value) + + +class TemplateModal(discord.ui.Modal, title="Template"): + """A modal to enter a filter ID to copy its overrides over.""" + + template = discord.ui.TextInput(label="Template Filter ID") + + def __init__(self, embed_view: FilterEditView, message: discord.Message): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.embed_view = embed_view + self.message = message + + async def on_submit(self, interaction: Interaction) -> None: + """Update the embed with the new description.""" + await self.embed_view.apply_template(self.template.value, self.message, interaction) + + +class FilterEditView(EditBaseView): + """A view used to edit a filter's settings before updating the database.""" + + class _REMOVE: + """Sentinel value for when an override should be removed.""" + + def __init__( + self, + filter_list: FilterList, + list_type: ListType, + filter_type: type[Filter], + content: str | None, + description: str | None, + settings_overrides: dict, + filter_settings_overrides: dict, + loaded_settings: dict, + loaded_filter_settings: dict, + author: User, + embed: Embed, + confirm_callback: Callable + ): + super().__init__(author) + self.filter_list = filter_list + self.list_type = list_type + self.filter_type = filter_type + self.content = content + self.description = description + self.settings_overrides = settings_overrides + self.filter_settings_overrides = filter_settings_overrides + self.loaded_settings = loaded_settings + self.loaded_filter_settings = loaded_filter_settings + self.embed = embed + self.confirm_callback = confirm_callback + + all_settings_repr_dict = build_filter_repr_dict( + filter_list, list_type, filter_type, settings_overrides, filter_settings_overrides + ) + populate_embed_from_dict(embed, all_settings_repr_dict) + + self.type_per_setting_name = {setting: info[2] for setting, info in loaded_settings.items()} + self.type_per_setting_name.update({ + f"{filter_type.name}/{name}": type_ + for name, (_, _, type_) in loaded_filter_settings.get(filter_type.name, {}).items() + }) + + add_select = CustomCallbackSelect( + self._prompt_new_value, + placeholder="Select a setting to edit", + options=[SelectOption(label=name) for name in sorted(self.type_per_setting_name)], + row=1 + ) + self.add_item(add_select) + + if settings_overrides or filter_settings_overrides: + override_names = ( + list(settings_overrides) + [f"{filter_list.name}/{setting}" for setting in filter_settings_overrides] + ) + remove_select = CustomCallbackSelect( + self._remove_override, + placeholder="Select an override to remove", + options=[SelectOption(label=name) for name in sorted(override_names)], + row=2 + ) + self.add_item(remove_select) + + @discord.ui.button(label="Edit Content", row=3) + async def edit_content(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to edit the filter's content. Pressing the button invokes a modal.""" + modal = EditContentModal(self, interaction.message) + await interaction.response.send_modal(modal) + + @discord.ui.button(label="Edit Description", row=3) + async def edit_description(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to edit the filter's description. Pressing the button invokes a modal.""" + modal = EditDescriptionModal(self, interaction.message) + await interaction.response.send_modal(modal) + + @discord.ui.button(label="Empty Description", row=3) + async def empty_description(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to empty the filter's description.""" + await self.update_embed(interaction, description=self._REMOVE) + + @discord.ui.button(label="Template", row=3) + async def enter_template(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to enter a filter template ID and copy its overrides over.""" + modal = TemplateModal(self, interaction.message) + await interaction.response.send_modal(modal) + + @discord.ui.button(label="✅ Confirm", style=discord.ButtonStyle.green, row=4) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Confirm the content, description, and settings, and update the filters database.""" + if self.content is None: + await interaction.response.send_message( + ":x: Cannot add a filter with no content.", ephemeral=True, reference=interaction.message + ) + if self.description is None: + self.description = "" + await interaction.response.edit_message(view=None) # Make sure the interaction succeeds first. + try: + await self.confirm_callback( + interaction.message, + self.filter_list, + self.list_type, + self.filter_type, + self.content, + self.description, + self.settings_overrides, + self.filter_settings_overrides + ) + except ResponseCodeError as e: + await interaction.message.reply(embed=format_response_error(e)) + await interaction.message.edit(view=self) + except BadArgument as e: + await interaction.message.reply( + embed=Embed(colour=discord.Colour.red(), title="Bad Argument", description=str(e)) + ) + await interaction.message.edit(view=self) + else: + self.stop() + + @discord.ui.button(label="🚫 Cancel", style=discord.ButtonStyle.red, row=4) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the operation.""" + await interaction.response.edit_message(content="🚫 Operation canceled.", embed=None, view=None) + self.stop() + + def current_value(self, setting_name: str) -> Any: + """Get the current value stored for the setting or MISSING if none found.""" + if setting_name in self.settings_overrides: + return self.settings_overrides[setting_name] + if "/" in setting_name: + _, setting_name = setting_name.split("/", maxsplit=1) + if setting_name in self.filter_settings_overrides: + return self.filter_settings_overrides[setting_name] + return MISSING + + async def update_embed( + self, + interaction_or_msg: discord.Interaction | discord.Message, + *, + content: str | None = None, + description: str | type[FilterEditView._REMOVE] | None = None, + setting_name: str | None = None, + setting_value: str | type[FilterEditView._REMOVE] | None = None, + ) -> None: + """ + Update the embed with the new information. + + If a setting name is provided with a _REMOVE value, remove the override. + If `interaction_or_msg` is a Message, the invoking Interaction must be deferred before calling this function. + """ + if content is not None or description is not None: + if content is not None: + filter_type = self.filter_list.get_filter_type(content) + if not filter_type: + if isinstance(interaction_or_msg, discord.Message): + send_method = interaction_or_msg.channel.send + else: + send_method = interaction_or_msg.response.send_message + await send_method(f":x: Could not find a filter type appropriate for `{content}`.") + return + self.content = content + self.filter_type = filter_type + else: + content = self.content # If there's no content or description, use the existing values. + if description is self._REMOVE: + self.description = None + elif description is not None: + self.description = description + else: + description = self.description + + # Update the embed with the new content and/or description. + self.embed.description = f"`{content}`" if content else "*No content*" + if description and description is not self._REMOVE: + self.embed.description += f" - {description}" + if len(self.embed.description) > MAX_EMBED_DESCRIPTION: + self.embed.description = self.embed.description[:MAX_EMBED_DESCRIPTION - 5] + "[...]" + + if setting_name: + # Find the right dictionary to update. + if "/" in setting_name: + filter_name, setting_name = setting_name.split("/", maxsplit=1) + dict_to_edit = self.filter_settings_overrides + default_value = self.filter_type.extra_fields_type().dict()[setting_name] + else: + dict_to_edit = self.settings_overrides + default_value = self.filter_list[self.list_type].default(setting_name) + # Update the setting override value or remove it + if setting_value is not self._REMOVE: + if not repr_equals(setting_value, default_value): + dict_to_edit[setting_name] = setting_value + # If there's already an override, remove it, since the new value is the same as the default. + elif setting_name in dict_to_edit: + dict_to_edit.pop(setting_name) + elif setting_name in dict_to_edit: + dict_to_edit.pop(setting_name) + + # This is inefficient, but otherwise the selects go insane if the user attempts to edit the same setting + # multiple times, even when replacing the select with a new one. + self.embed.clear_fields() + new_view = self.copy() + + try: + if isinstance(interaction_or_msg, discord.Interaction): + await interaction_or_msg.response.edit_message(embed=self.embed, view=new_view) + else: + await interaction_or_msg.edit(embed=self.embed, view=new_view) + except discord.errors.HTTPException: # Various unexpected errors. + pass + else: + self.stop() + + async def edit_setting_override(self, interaction: Interaction, setting_name: str, override_value: Any) -> None: + """ + Update the overrides with the new value and edit the embed. + + The interaction needs to be the selection of the setting attached to the embed. + """ + await self.update_embed(interaction, setting_name=setting_name, setting_value=override_value) + + async def apply_template(self, template_id: str, embed_message: discord.Message, interaction: Interaction) -> None: + """Replace any non-overridden settings with overrides from the given filter.""" + try: + settings, filter_settings = template_settings( + template_id, self.filter_list, self.list_type, self.filter_type + ) + except BadArgument as e: # The interaction object is necessary to send an ephemeral message. + await interaction.response.send_message(f":x: {e}", ephemeral=True) + return + else: + await interaction.response.defer() + + self.settings_overrides = settings | self.settings_overrides + self.filter_settings_overrides = filter_settings | self.filter_settings_overrides + self.embed.clear_fields() + await embed_message.edit(embed=self.embed, view=self.copy()) + self.stop() + + async def _remove_override(self, interaction: Interaction, select: discord.ui.Select) -> None: + """ + Remove the override for the setting the user selected, and edit the embed. + + The interaction needs to be the selection of the setting attached to the embed. + """ + await self.update_embed(interaction, setting_name=select.values[0], setting_value=self._REMOVE) + + def copy(self) -> FilterEditView: + """Create a copy of this view.""" + return FilterEditView( + self.filter_list, + self.list_type, + self.filter_type, + self.content, + self.description, + self.settings_overrides, + self.filter_settings_overrides, + self.loaded_settings, + self.loaded_filter_settings, + self.author, + self.embed, + self.confirm_callback + ) + + +def description_and_settings_converter( + filter_list: FilterList, + list_type: ListType, + filter_type: type[Filter], + loaded_settings: dict, + loaded_filter_settings: dict, + input_data: str +) -> tuple[str, dict[str, Any], dict[str, Any]]: + """Parse a string representing a possible description and setting overrides, and validate the setting names.""" + if not input_data: + return "", {}, {} + + parsed = SETTINGS_DELIMITER.split(input_data) + if not parsed: + return "", {}, {} + + description = "" + if not SINGLE_SETTING_PATTERN.match(parsed[0]): + description, *parsed = parsed + + settings = {setting: value for setting, value in [part.split("=", maxsplit=1) for part in parsed]} + template = None + if "--template" in settings: + template = settings.pop("--template") + + filter_settings = {} + for setting, _ in list(settings.items()): + if setting in loaded_settings: # It's a filter list setting + type_ = loaded_settings[setting][2] + try: + parsed_value = parse_value(settings.pop(setting), type_) + if not repr_equals(parsed_value, filter_list[list_type].default(setting)): + settings[setting] = parsed_value + except (TypeError, ValueError) as e: + raise BadArgument(e) + elif "/" not in setting: + raise BadArgument(f"{setting!r} is not a recognized setting.") + else: # It's a filter setting + filter_name, filter_setting_name = setting.split("/", maxsplit=1) + if filter_name.lower() != filter_type.name.lower(): + raise BadArgument( + f"A setting for a {filter_name!r} filter was provided, but the filter name is {filter_type.name!r}" + ) + if filter_setting_name not in loaded_filter_settings[filter_type.name]: + raise BadArgument(f"{setting!r} is not a recognized setting.") + type_ = loaded_filter_settings[filter_type.name][filter_setting_name][2] + try: + parsed_value = parse_value(settings.pop(setting), type_) + if not repr_equals(parsed_value, getattr(filter_type.extra_fields_type(), filter_setting_name)): + filter_settings[filter_setting_name] = parsed_value + except (TypeError, ValueError) as e: + raise BadArgument(e) + + # Pull templates settings and apply them. + if template is not None: + try: + t_settings, t_filter_settings = template_settings(template, filter_list, list_type, filter_type) + except ValueError as e: + raise BadArgument(str(e)) + else: + # The specified settings go on top of the template + settings = t_settings | settings + filter_settings = t_filter_settings | filter_settings + + return description, settings, filter_settings + + +def filter_serializable_overrides(filter_: Filter) -> tuple[dict, dict]: + """Get a serializable version of the filter's overrides.""" + overrides_values, extra_fields_overrides = filter_.overrides + return to_serializable(overrides_values), to_serializable(extra_fields_overrides) + + +def template_settings( + filter_id: str, filter_list: FilterList, list_type: ListType, filter_type: type[Filter] +) -> tuple[dict, dict]: + """Find the filter with specified ID, and return its settings.""" + try: + filter_id = int(filter_id) + if filter_id < 0: + raise ValueError() + except ValueError: + raise BadArgument("Template value must be a non-negative integer.") + + if filter_id not in filter_list[list_type].filters: + raise BadArgument( + f"Could not find filter with ID `{filter_id}` in the {list_type.name} {filter_list.name} list." + ) + filter_ = filter_list[list_type].filters[filter_id] + + if not isinstance(filter_, filter_type): + raise BadArgument( + f"The template filter name is {filter_.name!r}, but the target filter is {filter_type.name!r}" + ) + return filter_serializable_overrides(filter_) diff --git a/bot/exts/filtering/_ui/filter_list.py b/bot/exts/filtering/_ui/filter_list.py new file mode 100644 index 000000000..a4526f090 --- /dev/null +++ b/bot/exts/filtering/_ui/filter_list.py @@ -0,0 +1,271 @@ +from __future__ import annotations + +from typing import Any, Callable + +import discord +from discord import Embed, Interaction, SelectOption, User +from discord.ext.commands import BadArgument +from pydis_core.site_api import ResponseCodeError + +from bot.exts.filtering._filter_lists import FilterList, ListType +from bot.exts.filtering._ui.ui import ( + CustomCallbackSelect, EditBaseView, MISSING, SETTINGS_DELIMITER, format_response_error, parse_value, + populate_embed_from_dict +) +from bot.exts.filtering._utils import repr_equals, to_serializable + + +def settings_converter(loaded_settings: dict, input_data: str) -> dict[str, Any]: + """Parse a string representing settings, and validate the setting names.""" + if not input_data: + return {} + + parsed = SETTINGS_DELIMITER.split(input_data) + if not parsed: + return {} + + try: + settings = {setting: value for setting, value in [part.split("=", maxsplit=1) for part in parsed]} + except ValueError: + raise BadArgument("The settings provided are not in the correct format.") + + for setting in settings: + if setting not in loaded_settings: + raise BadArgument(f"{setting!r} is not a recognized setting.") + else: + type_ = loaded_settings[setting][2] + try: + parsed_value = parse_value(settings.pop(setting), type_) + settings[setting] = parsed_value + except (TypeError, ValueError) as e: + raise BadArgument(e) + + return settings + + +def build_filterlist_repr_dict(filter_list: FilterList, list_type: ListType, new_settings: dict) -> dict: + """Build a dictionary of field names and values to pass to `_build_embed_from_dict`.""" + # Get filter list settings + default_setting_values = {} + for settings_group in filter_list[list_type].defaults: + for _, setting in settings_group.items(): + default_setting_values.update(to_serializable(setting.dict())) + + # Add new values. It's done in this way to preserve field order, since the new_values won't have all settings. + total_values = {} + for name, value in default_setting_values.items(): + if name not in new_settings or repr_equals(new_settings[name], value): + total_values[name] = value + else: + total_values[f"{name}~"] = new_settings[name] + + return total_values + + +class FilterListAddView(EditBaseView): + """A view used to add a new filter list.""" + + def __init__( + self, + list_name: str, + list_type: ListType, + settings: dict, + loaded_settings: dict, + author: User, + embed: Embed, + confirm_callback: Callable + ): + super().__init__(author) + self.list_name = list_name + self.list_type = list_type + self.settings = settings + self.loaded_settings = loaded_settings + self.embed = embed + self.confirm_callback = confirm_callback + + self.settings_repr_dict = {name: to_serializable(value) for name, value in settings.items()} + populate_embed_from_dict(embed, self.settings_repr_dict) + + self.type_per_setting_name = {setting: info[2] for setting, info in loaded_settings.items()} + + edit_select = CustomCallbackSelect( + self._prompt_new_value, + placeholder="Select a setting to edit", + options=[SelectOption(label=name) for name in sorted(settings)], + row=0 + ) + self.add_item(edit_select) + + @discord.ui.button(label="✅ Confirm", style=discord.ButtonStyle.green, row=1) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Confirm the content, description, and settings, and update the filters database.""" + await interaction.response.edit_message(view=None) # Make sure the interaction succeeds first. + try: + await self.confirm_callback(interaction.message, self.list_name, self.list_type, self.settings) + except ResponseCodeError as e: + await interaction.message.reply(embed=format_response_error(e)) + await interaction.message.edit(view=self) + else: + self.stop() + + @discord.ui.button(label="🚫 Cancel", style=discord.ButtonStyle.red, row=1) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the operation.""" + await interaction.response.edit_message(content="🚫 Operation canceled.", embed=None, view=None) + self.stop() + + def current_value(self, setting_name: str) -> Any: + """Get the current value stored for the setting or MISSING if none found.""" + if setting_name in self.settings: + return self.settings[setting_name] + return MISSING + + async def update_embed( + self, + interaction_or_msg: discord.Interaction | discord.Message, + *, + setting_name: str | None = None, + setting_value: str | None = None, + ) -> None: + """ + Update the embed with the new information. + + If `interaction_or_msg` is a Message, the invoking Interaction must be deferred before calling this function. + """ + if not setting_name: # Obligatory check to match the signature in the parent class. + return + + self.settings[setting_name] = setting_value + + self.embed.clear_fields() + new_view = self.copy() + + try: + if isinstance(interaction_or_msg, discord.Interaction): + await interaction_or_msg.response.edit_message(embed=self.embed, view=new_view) + else: + await interaction_or_msg.edit(embed=self.embed, view=new_view) + except discord.errors.HTTPException: # Various unexpected errors. + pass + else: + self.stop() + + def copy(self) -> FilterListAddView: + """Create a copy of this view.""" + return FilterListAddView( + self.list_name, + self.list_type, + self.settings, + self.loaded_settings, + self.author, + self.embed, + self.confirm_callback + ) + + +class FilterListEditView(EditBaseView): + """A view used to edit a filter list's settings before updating the database.""" + + def __init__( + self, + filter_list: FilterList, + list_type: ListType, + new_settings: dict, + loaded_settings: dict, + author: User, + embed: Embed, + confirm_callback: Callable + ): + super().__init__(author) + self.filter_list = filter_list + self.list_type = list_type + self.settings = new_settings + self.loaded_settings = loaded_settings + self.embed = embed + self.confirm_callback = confirm_callback + + self.settings_repr_dict = build_filterlist_repr_dict(filter_list, list_type, new_settings) + populate_embed_from_dict(embed, self.settings_repr_dict) + + self.type_per_setting_name = {setting: info[2] for setting, info in loaded_settings.items()} + + edit_select = CustomCallbackSelect( + self._prompt_new_value, + placeholder="Select a setting to edit", + options=[SelectOption(label=name) for name in sorted(self.type_per_setting_name)], + row=0 + ) + self.add_item(edit_select) + + @discord.ui.button(label="✅ Confirm", style=discord.ButtonStyle.green, row=1) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Confirm the content, description, and settings, and update the filters database.""" + await interaction.response.edit_message(view=None) # Make sure the interaction succeeds first. + try: + await self.confirm_callback(interaction.message, self.filter_list, self.list_type, self.settings) + except ResponseCodeError as e: + await interaction.message.reply(embed=format_response_error(e)) + await interaction.message.edit(view=self) + else: + self.stop() + + @discord.ui.button(label="🚫 Cancel", style=discord.ButtonStyle.red, row=1) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the operation.""" + await interaction.response.edit_message(content="🚫 Operation canceled.", embed=None, view=None) + self.stop() + + def current_value(self, setting_name: str) -> Any: + """Get the current value stored for the setting or MISSING if none found.""" + if setting_name in self.settings: + return self.settings[setting_name] + if setting_name in self.settings_repr_dict: + return self.settings_repr_dict[setting_name] + return MISSING + + async def update_embed( + self, + interaction_or_msg: discord.Interaction | discord.Message, + *, + setting_name: str | None = None, + setting_value: str | None = None, + ) -> None: + """ + Update the embed with the new information. + + If `interaction_or_msg` is a Message, the invoking Interaction must be deferred before calling this function. + """ + if not setting_name: # Obligatory check to match the signature in the parent class. + return + + default_value = self.filter_list[self.list_type].default(setting_name) + if not repr_equals(setting_value, default_value): + self.settings[setting_name] = setting_value + # If there's already a new value, remove it, since the new value is the same as the default. + elif setting_name in self.settings: + self.settings.pop(setting_name) + + self.embed.clear_fields() + new_view = self.copy() + + try: + if isinstance(interaction_or_msg, discord.Interaction): + await interaction_or_msg.response.edit_message(embed=self.embed, view=new_view) + else: + await interaction_or_msg.edit(embed=self.embed, view=new_view) + except discord.errors.HTTPException: # Various errors such as embed description being too long. + pass + else: + self.stop() + + def copy(self) -> FilterListEditView: + """Create a copy of this view.""" + return FilterListEditView( + self.filter_list, + self.list_type, + self.settings, + self.loaded_settings, + self.author, + self.embed, + self.confirm_callback + ) diff --git a/bot/exts/filtering/_ui/search.py b/bot/exts/filtering/_ui/search.py new file mode 100644 index 000000000..d553c28ea --- /dev/null +++ b/bot/exts/filtering/_ui/search.py @@ -0,0 +1,365 @@ +from __future__ import annotations + +from collections.abc import Callable +from typing import Any + +import discord +from discord import Interaction, SelectOption +from discord.ext.commands import BadArgument + +from bot.exts.filtering._filter_lists import FilterList, ListType +from bot.exts.filtering._filters.filter import Filter +from bot.exts.filtering._settings_types.settings_entry import SettingsEntry +from bot.exts.filtering._ui.filter import filter_serializable_overrides +from bot.exts.filtering._ui.ui import ( + COMPONENT_TIMEOUT, CustomCallbackSelect, EditBaseView, MISSING, SETTINGS_DELIMITER, parse_value, + populate_embed_from_dict +) + + +def search_criteria_converter( + filter_lists: dict, + loaded_filters: dict, + loaded_settings: dict, + loaded_filter_settings: dict, + filter_type: type[Filter] | None, + input_data: str +) -> tuple[dict[str, Any], dict[str, Any], type[Filter]]: + """Parse a string representing setting overrides, and validate the setting names.""" + if not input_data: + return {}, {}, filter_type + + parsed = SETTINGS_DELIMITER.split(input_data) + if not parsed: + return {}, {}, filter_type + + try: + settings = {setting: value for setting, value in [part.split("=", maxsplit=1) for part in parsed]} + except ValueError: + raise BadArgument("The settings provided are not in the correct format.") + + template = None + if "--template" in settings: + template = settings.pop("--template") + + filter_settings = {} + for setting, _ in list(settings.items()): + if setting in loaded_settings: # It's a filter list setting + type_ = loaded_settings[setting][2] + try: + settings[setting] = parse_value(settings[setting], type_) + except (TypeError, ValueError) as e: + raise BadArgument(e) + elif "/" not in setting: + raise BadArgument(f"{setting!r} is not a recognized setting.") + else: # It's a filter setting + filter_name, filter_setting_name = setting.split("/", maxsplit=1) + if not filter_type: + if filter_name in loaded_filters: + filter_type = loaded_filters[filter_name] + else: + raise BadArgument(f"There's no filter type named {filter_name!r}.") + if filter_name.lower() != filter_type.name.lower(): + raise BadArgument( + f"A setting for a {filter_name!r} filter was provided, " + f"but the filter name is {filter_type.name!r}" + ) + if filter_setting_name not in loaded_filter_settings[filter_type.name]: + raise BadArgument(f"{setting!r} is not a recognized setting.") + type_ = loaded_filter_settings[filter_type.name][filter_setting_name][2] + try: + filter_settings[filter_setting_name] = parse_value(settings.pop(setting), type_) + except (TypeError, ValueError) as e: + raise BadArgument(e) + + # Pull templates settings and apply them. + if template is not None: + try: + t_settings, t_filter_settings, filter_type = template_settings(template, filter_lists, filter_type) + except ValueError as e: + raise BadArgument(str(e)) + else: + # The specified settings go on top of the template + settings = t_settings | settings + filter_settings = t_filter_settings | filter_settings + + return settings, filter_settings, filter_type + + +def get_filter(filter_id: int, filter_lists: dict) -> tuple[Filter, FilterList, ListType] | None: + """Return a filter with the specific filter_id, if found.""" + for filter_list in filter_lists.values(): + for list_type, sublist in filter_list.items(): + if filter_id in sublist.filters: + return sublist.filters[filter_id], filter_list, list_type + return None + + +def template_settings( + filter_id: str, filter_lists: dict, filter_type: type[Filter] | None +) -> tuple[dict, dict, type[Filter]]: + """Find a filter with the specified ID and filter type, and return its settings and (maybe newly found) type.""" + try: + filter_id = int(filter_id) + if filter_id < 0: + raise ValueError() + except ValueError: + raise BadArgument("Template value must be a non-negative integer.") + + result = get_filter(filter_id, filter_lists) + if not result: + raise BadArgument(f"Could not find a filter with ID `{filter_id}`.") + filter_, filter_list, list_type = result + + if filter_type and not isinstance(filter_, filter_type): + raise BadArgument(f"The filter with ID `{filter_id}` is not of type {filter_type.name!r}.") + + settings, filter_settings = filter_serializable_overrides(filter_) + return settings, filter_settings, type(filter_) + + +def build_search_repr_dict( + settings: dict[str, Any], filter_settings: dict[str, Any], filter_type: type[Filter] | None +) -> dict: + """Build a dictionary of field names and values to pass to `populate_embed_from_dict`.""" + total_values = settings.copy() + if filter_type: + for setting_name, value in filter_settings.items(): + total_values[f"{filter_type.name}/{setting_name}"] = value + + return total_values + + +class SearchEditView(EditBaseView): + """A view used to edit the search criteria before performing the search.""" + + class _REMOVE: + """Sentinel value for when an override should be removed.""" + + def __init__( + self, + filter_type: type[Filter] | None, + settings: dict[str, Any], + filter_settings: dict[str, Any], + loaded_filter_lists: dict[str, FilterList], + loaded_filters: dict[str, type[Filter]], + loaded_settings: dict[str, tuple[str, SettingsEntry, type]], + loaded_filter_settings: dict[str, dict[str, tuple[str, SettingsEntry, type]]], + author: discord.User | discord.Member, + embed: discord.Embed, + confirm_callback: Callable + ): + super().__init__(author) + self.filter_type = filter_type + self.settings = settings + self.filter_settings = filter_settings + self.loaded_filter_lists = loaded_filter_lists + self.loaded_filters = loaded_filters + self.loaded_settings = loaded_settings + self.loaded_filter_settings = loaded_filter_settings + self.embed = embed + self.confirm_callback = confirm_callback + + title = "Filters Search" + if filter_type: + title += f" - {filter_type.name.title()}" + embed.set_author(name=title) + + settings_repr_dict = build_search_repr_dict(settings, filter_settings, filter_type) + populate_embed_from_dict(embed, settings_repr_dict) + + self.type_per_setting_name = {setting: info[2] for setting, info in loaded_settings.items()} + if filter_type: + self.type_per_setting_name.update({ + f"{filter_type.name}/{name}": type_ + for name, (_, _, type_) in loaded_filter_settings.get(filter_type.name, {}).items() + }) + + add_select = CustomCallbackSelect( + self._prompt_new_value, + placeholder="Add or edit criterion", + options=[SelectOption(label=name) for name in sorted(self.type_per_setting_name)], + row=0 + ) + self.add_item(add_select) + + if settings_repr_dict: + remove_select = CustomCallbackSelect( + self._remove_criterion, + placeholder="Select a criterion to remove", + options=[SelectOption(label=name) for name in sorted(settings_repr_dict)], + row=1 + ) + self.add_item(remove_select) + + @discord.ui.button(label="Template", row=2) + async def enter_template(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to enter a filter template ID and copy its overrides over.""" + modal = TemplateModal(self, interaction.message) + await interaction.response.send_modal(modal) + + @discord.ui.button(label="Filter Type", row=2) + async def enter_filter_type(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to enter a filter type.""" + modal = FilterTypeModal(self, interaction.message) + await interaction.response.send_modal(modal) + + @discord.ui.button(label="✅ Confirm", style=discord.ButtonStyle.green, row=3) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Confirm the search criteria and perform the search.""" + await interaction.response.edit_message(view=None) # Make sure the interaction succeeds first. + try: + await self.confirm_callback(interaction.message, self.filter_type, self.settings, self.filter_settings) + except BadArgument as e: + await interaction.message.reply( + embed=discord.Embed(colour=discord.Colour.red(), title="Bad Argument", description=str(e)) + ) + await interaction.message.edit(view=self) + else: + self.stop() + + @discord.ui.button(label="🚫 Cancel", style=discord.ButtonStyle.red, row=3) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the operation.""" + await interaction.response.edit_message(content="🚫 Operation canceled.", embed=None, view=None) + self.stop() + + def current_value(self, setting_name: str) -> Any: + """Get the current value stored for the setting or MISSING if none found.""" + if setting_name in self.settings: + return self.settings[setting_name] + if "/" in setting_name: + _, setting_name = setting_name.split("/", maxsplit=1) + if setting_name in self.filter_settings: + return self.filter_settings[setting_name] + return MISSING + + async def update_embed( + self, + interaction_or_msg: discord.Interaction | discord.Message, + *, + setting_name: str | None = None, + setting_value: str | type[SearchEditView._REMOVE] | None = None, + ) -> None: + """ + Update the embed with the new information. + + If a setting name is provided with a _REMOVE value, remove the override. + If `interaction_or_msg` is a Message, the invoking Interaction must be deferred before calling this function. + """ + if not setting_name: # Can be None just to make the function signature compatible with the parent class. + return + + if "/" in setting_name: + filter_name, setting_name = setting_name.split("/", maxsplit=1) + dict_to_edit = self.filter_settings + else: + dict_to_edit = self.settings + + # Update the criterion value or remove it + if setting_value is not self._REMOVE: + dict_to_edit[setting_name] = setting_value + elif setting_name in dict_to_edit: + dict_to_edit.pop(setting_name) + + self.embed.clear_fields() + new_view = self.copy() + + try: + if isinstance(interaction_or_msg, discord.Interaction): + await interaction_or_msg.response.edit_message(embed=self.embed, view=new_view) + else: + await interaction_or_msg.edit(embed=self.embed, view=new_view) + except discord.errors.HTTPException: # Just in case of faulty input. + pass + else: + self.stop() + + async def _remove_criterion(self, interaction: Interaction, select: discord.ui.Select) -> None: + """ + Remove the criterion the user selected, and edit the embed. + + The interaction needs to be the selection of the setting attached to the embed. + """ + await self.update_embed(interaction, setting_name=select.values[0], setting_value=self._REMOVE) + + async def apply_template(self, template_id: str, embed_message: discord.Message, interaction: Interaction) -> None: + """Set any unset criteria with settings values from the given filter.""" + try: + settings, filter_settings, self.filter_type = template_settings( + template_id, self.loaded_filter_lists, self.filter_type + ) + except BadArgument as e: # The interaction object is necessary to send an ephemeral message. + await interaction.response.send_message(f":x: {e}", ephemeral=True) + return + else: + await interaction.response.defer() + + self.settings = settings | self.settings + self.filter_settings = filter_settings | self.filter_settings + self.embed.clear_fields() + await embed_message.edit(embed=self.embed, view=self.copy()) + self.stop() + + async def apply_filter_type(self, type_name: str, embed_message: discord.Message, interaction: Interaction) -> None: + """Set a new filter type and reset any criteria for settings of the old filter type.""" + if type_name.lower() not in self.loaded_filters: + if type_name.lower()[:-1] not in self.loaded_filters: # In case the user entered the plural form. + await interaction.response.send_message(f":x: No such filter type {type_name!r}.", ephemeral=True) + return + type_name = type_name[:-1] + type_name = type_name.lower() + await interaction.response.defer() + + if self.filter_type and type_name == self.filter_type.name: + return + self.filter_type = self.loaded_filters[type_name] + self.filter_settings = {} + self.embed.clear_fields() + await embed_message.edit(embed=self.embed, view=self.copy()) + self.stop() + + def copy(self) -> SearchEditView: + """Create a copy of this view.""" + return SearchEditView( + self.filter_type, + self.settings, + self.filter_settings, + self.loaded_filter_lists, + self.loaded_filters, + self.loaded_settings, + self.loaded_filter_settings, + self.author, + self.embed, + self.confirm_callback + ) + + +class TemplateModal(discord.ui.Modal, title="Template"): + """A modal to enter a filter ID to copy its overrides over.""" + + template = discord.ui.TextInput(label="Template Filter ID", required=False) + + def __init__(self, embed_view: SearchEditView, message: discord.Message): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.embed_view = embed_view + self.message = message + + async def on_submit(self, interaction: Interaction) -> None: + """Update the embed with the new description.""" + await self.embed_view.apply_template(self.template.value, self.message, interaction) + + +class FilterTypeModal(discord.ui.Modal, title="Template"): + """A modal to enter a filter ID to copy its overrides over.""" + + filter_type = discord.ui.TextInput(label="Filter Type") + + def __init__(self, embed_view: SearchEditView, message: discord.Message): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.embed_view = embed_view + self.message = message + + async def on_submit(self, interaction: Interaction) -> None: + """Update the embed with the new description.""" + await self.embed_view.apply_filter_type(self.filter_type.value, self.message, interaction) diff --git a/bot/exts/filtering/_ui/ui.py b/bot/exts/filtering/_ui/ui.py new file mode 100644 index 000000000..157906d6b --- /dev/null +++ b/bot/exts/filtering/_ui/ui.py @@ -0,0 +1,565 @@ +from __future__ import annotations + +import re +from abc import ABC, abstractmethod +from collections.abc import Iterable +from enum import EnumMeta +from functools import partial +from typing import Any, Callable, Coroutine, Optional, TypeVar + +import discord +from discord import Embed, Interaction +from discord.ext.commands import Context +from discord.ui.select import MISSING as SELECT_MISSING, SelectOption +from discord.utils import escape_markdown +from pydis_core.site_api import ResponseCodeError +from pydis_core.utils import scheduling +from pydis_core.utils.logging import get_logger +from pydis_core.utils.members import get_or_fetch_member + +import bot +from bot.constants import Colours +from bot.exts.filtering._filter_context import FilterContext +from bot.exts.filtering._filter_lists import FilterList +from bot.exts.filtering._utils import FakeContext +from bot.utils.messages import format_channel, format_user, upload_log + +log = get_logger(__name__) + + +# Max number of characters in a Discord embed field value, minus 6 characters for a placeholder. +MAX_FIELD_SIZE = 1018 +# Max number of characters for an embed field's value before it should take its own line. +MAX_INLINE_SIZE = 50 +# Number of seconds before a settings editing view timeout. +EDIT_TIMEOUT = 600 +# Number of seconds before timeout of an editing component. +COMPONENT_TIMEOUT = 180 +# Amount of seconds to confirm the operation. +DELETION_TIMEOUT = 60 +# Max length of modal title +MAX_MODAL_TITLE_LENGTH = 45 +# Max number of items in a select +MAX_SELECT_ITEMS = 25 +MAX_EMBED_DESCRIPTION = 4080 +# Number of seconds before timeout of the alert view +ALERT_VIEW_TIMEOUT = 3600 + +SETTINGS_DELIMITER = re.compile(r"\s+(?=\S+=\S+)") +SINGLE_SETTING_PATTERN = re.compile(r"[\w/]+=.+") + +# Sentinel value to denote that a value is missing +MISSING = object() + +T = TypeVar('T') + + +async def _build_alert_message_content(ctx: FilterContext, current_message_length: int) -> str: + """Build the content section of the alert.""" + # For multiple messages and those with attachments or excessive newlines, use the logs API + if ctx.messages_deletion and ctx.upload_deletion_logs and any(( + ctx.related_messages, + len(ctx.attachments) > 0, + ctx.content.count('\n') > 15 + )): + url = await upload_log(ctx.related_messages, bot.instance.user.id, ctx.attachments) + return f"A complete log of the offending messages can be found [here]({url})" + + alert_content = escape_markdown(ctx.content) + remaining_chars = MAX_EMBED_DESCRIPTION - current_message_length + + if len(alert_content) > remaining_chars: + if ctx.messages_deletion and ctx.upload_deletion_logs: + url = await upload_log([ctx.message], bot.instance.user.id, ctx.attachments) + log_site_msg = f"The full message can be found [here]({url})" + # 7 because that's the length of "[...]\n\n" + return alert_content[:remaining_chars - (7 + len(log_site_msg))] + "[...]\n\n" + log_site_msg + else: + return alert_content[:remaining_chars - 5] + "[...]" + + return alert_content + + +async def build_mod_alert(ctx: FilterContext, triggered_filters: dict[FilterList, Iterable[str]]) -> Embed: + """Build an alert message from the filter context.""" + embed = Embed(color=Colours.soft_orange) + embed.set_thumbnail(url=ctx.author.display_avatar.url) + triggered_by = f"**Triggered by:** {format_user(ctx.author)}" + if ctx.channel: + if ctx.channel.guild: + triggered_in = f"**Triggered in:** {format_channel(ctx.channel)}\n" + else: + triggered_in = "**Triggered in:** :warning:**DM**:warning:\n" + if len(ctx.related_channels) > 1: + triggered_in += f"**Channels:** {', '.join(channel.mention for channel in ctx.related_channels)}\n" + else: + triggered_by += "\n" + triggered_in = "" + + filters = [] + for filter_list, list_message in triggered_filters.items(): + if list_message: + filters.append(f"**{filter_list.name.title()} Filters:** {', '.join(list_message)}") + filters = "\n".join(filters) + + matches = "**Matches:** " + ", ".join(repr(match) for match in ctx.matches) if ctx.matches else "" + actions = "\n**Actions Taken:** " + (", ".join(ctx.action_descriptions) if ctx.action_descriptions else "-") + + mod_alert_message = "\n".join(part for part in (triggered_by, triggered_in, filters, matches, actions) if part) + log.debug(f"{ctx.event.name} Filter:\n{mod_alert_message}") + + if ctx.message: + mod_alert_message += f"\n**[Original Content]({ctx.message.jump_url})**:\n" + else: + mod_alert_message += "\n**Original Content**:\n" + mod_alert_message += await _build_alert_message_content(ctx, len(mod_alert_message)) + + embed.description = mod_alert_message + return embed + + +def populate_embed_from_dict(embed: Embed, data: dict) -> None: + """Populate a Discord embed by populating fields from the given dict.""" + for setting, value in data.items(): + if setting.startswith("_"): + continue + if isinstance(value, (list, set, tuple)): + value = f"[{', '.join(map(str, value))}]" + else: + value = str(value) if value not in ("", None) else "-" + if len(value) > MAX_FIELD_SIZE: + value = value[:MAX_FIELD_SIZE] + " [...]" + embed.add_field(name=setting, value=value, inline=len(value) < MAX_INLINE_SIZE) + + +def parse_value(value: str, type_: type[T]) -> T: + """Parse the value and attempt to convert it to the provided type.""" + if hasattr(type_, "__origin__"): # In case this is a types.GenericAlias or a typing._GenericAlias + type_ = type_.__origin__ + if value == '""': + return type_() + if type_ in (tuple, list, set): + return list(value.split(",")) + if type_ is bool: + return value.lower() == "true" or value == "1" + if isinstance(type_, EnumMeta): + return type_[value.upper()] + + return type_(value) + + +def format_response_error(e: ResponseCodeError) -> Embed: + """Format the response error into an embed.""" + description = "" + if isinstance(e.response_json, list): + description = "\n".join(f"• {error}" for error in e.response_json) + elif isinstance(e.response_json, dict): + if "non_field_errors" in e.response_json: + non_field_errors = e.response_json.pop("non_field_errors") + description += "\n".join(f"• {error}" for error in non_field_errors) + "\n" + for field, errors in e.response_json.items(): + description += "\n".join(f"• {field} - {error}" for error in errors) + "\n" + + description = description.strip() + if len(description) > MAX_EMBED_DESCRIPTION: + description = description[:MAX_EMBED_DESCRIPTION] + "[...]" + if not description: + description = "Something unexpected happened, check the logs." + + embed = Embed(colour=discord.Colour.red(), title="Oops...", description=description) + return embed + + +class ArgumentCompletionSelect(discord.ui.Select): + """A select detailing the options that can be picked to assign to a missing argument.""" + + def __init__( + self, + ctx: Context, + args: list, + arg_name: str, + options: list[str], + position: int, + converter: Optional[Callable] = None + ): + super().__init__( + placeholder=f"Select a value for {arg_name!r}", + options=[discord.SelectOption(label=option) for option in options] + ) + self.ctx = ctx + self.args = args + self.position = position + self.converter = converter + + async def callback(self, interaction: discord.Interaction) -> None: + """re-invoke the context command with the completed argument value.""" + await interaction.response.defer() + value = interaction.data["values"][0] + if self.converter: + value = self.converter(value) + args = self.args.copy() # This makes the view reusable. + args.insert(self.position, value) + log.trace(f"Argument filled with the value {value}. Re-invoking command") + await self.ctx.invoke(self.ctx.command, *args) + + +class ArgumentCompletionView(discord.ui.View): + """A view used to complete a missing argument in an in invoked command.""" + + def __init__( + self, + ctx: Context, + args: list, + arg_name: str, + options: list[str], + position: int, + converter: Optional[Callable] = None + ): + super().__init__() + log.trace(f"The {arg_name} argument was designated missing in the invocation {ctx.view.buffer!r}") + self.add_item(ArgumentCompletionSelect(ctx, args, arg_name, options, position, converter)) + self.ctx = ctx + + async def interaction_check(self, interaction: discord.Interaction) -> bool: + """Check to ensure that the interacting user is the user who invoked the command.""" + if interaction.user != self.ctx.author: + embed = discord.Embed(description="Sorry, but this dropdown menu can only be used by the original author.") + await interaction.response.send_message(embed=embed, ephemeral=True) + return False + return True + + +class CustomCallbackSelect(discord.ui.Select): + """A selection which calls the provided callback on interaction.""" + + def __init__( + self, + callback: Callable[[Interaction, discord.ui.Select], Coroutine[None]], + *, + custom_id: str = SELECT_MISSING, + placeholder: str | None = None, + min_values: int = 1, + max_values: int = 1, + options: list[SelectOption] = SELECT_MISSING, + disabled: bool = False, + row: int | None = None, + ): + super().__init__( + custom_id=custom_id, + placeholder=placeholder, + min_values=min_values, + max_values=max_values, + options=options, + disabled=disabled, + row=row + ) + self.custom_callback = callback + + async def callback(self, interaction: Interaction) -> Any: + """Invoke the provided callback.""" + await self.custom_callback(interaction, self) + + +class BooleanSelectView(discord.ui.View): + """A view containing an instance of BooleanSelect.""" + + class BooleanSelect(discord.ui.Select): + """Select a true or false value and send it to the supplied callback.""" + + def __init__(self, setting_name: str, update_callback: Callable): + super().__init__(options=[SelectOption(label="True"), SelectOption(label="False")]) + self.setting_name = setting_name + self.update_callback = update_callback + + async def callback(self, interaction: Interaction) -> Any: + """Respond to the interaction by sending the boolean value to the update callback.""" + await interaction.response.edit_message(content="✅ Edit confirmed", view=None) + value = self.values[0] == "True" + await self.update_callback(setting_name=self.setting_name, setting_value=value) + + def __init__(self, setting_name: str, update_callback: Callable): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.add_item(self.BooleanSelect(setting_name, update_callback)) + + +class FreeInputModal(discord.ui.Modal): + """A modal to freely enter a value for a setting.""" + + def __init__(self, setting_name: str, type_: type, update_callback: Callable): + title = f"{setting_name} Input" if len(setting_name) < MAX_MODAL_TITLE_LENGTH - 6 else "Setting Input" + super().__init__(timeout=COMPONENT_TIMEOUT, title=title) + + self.setting_name = setting_name + self.type_ = type_ + self.update_callback = update_callback + + label = setting_name if len(setting_name) < MAX_MODAL_TITLE_LENGTH else "Value" + self.setting_input = discord.ui.TextInput(label=label, style=discord.TextStyle.paragraph, required=False) + self.add_item(self.setting_input) + + async def on_submit(self, interaction: Interaction) -> None: + """Update the setting with the new value in the embed.""" + try: + if not self.setting_input.value: + value = self.type_() + else: + value = self.type_(self.setting_input.value) + except (ValueError, TypeError): + await interaction.response.send_message( + f"Could not process the input value for `{self.setting_name}`.", ephemeral=True + ) + else: + await interaction.response.defer() + await self.update_callback(setting_name=self.setting_name, setting_value=value) + + +class SequenceEditView(discord.ui.View): + """A view to modify the contents of a sequence of values.""" + + class SingleItemModal(discord.ui.Modal): + """A modal to enter a single list item.""" + + new_item = discord.ui.TextInput(label="New Item") + + def __init__(self, view: SequenceEditView): + super().__init__(title="Item Addition", timeout=COMPONENT_TIMEOUT) + self.view = view + + async def on_submit(self, interaction: Interaction) -> None: + """Send the submitted value to be added to the list.""" + await self.view.apply_addition(interaction, self.new_item.value) + + class NewListModal(discord.ui.Modal): + """A modal to enter new contents for the list.""" + + new_value = discord.ui.TextInput(label="Enter comma separated values", style=discord.TextStyle.paragraph) + + def __init__(self, view: SequenceEditView): + super().__init__(title="New List", timeout=COMPONENT_TIMEOUT) + self.view = view + + async def on_submit(self, interaction: Interaction) -> None: + """Send the submitted value to be added to the list.""" + await self.view.apply_edit(interaction, self.new_value.value) + + def __init__(self, setting_name: str, starting_value: list, update_callback: Callable): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.setting_name = setting_name + self.stored_value = starting_value + self.update_callback = update_callback + + options = [SelectOption(label=item) for item in self.stored_value[:MAX_SELECT_ITEMS]] + self.removal_select = CustomCallbackSelect( + self.apply_removal, placeholder="Enter an item to remove", options=options, row=1 + ) + if self.stored_value: + self.add_item(self.removal_select) + + async def apply_removal(self, interaction: Interaction, select: discord.ui.Select) -> None: + """Remove an item from the list.""" + # The value might not be stored as a string. + _i = len(self.stored_value) + for _i, element in enumerate(self.stored_value): + if str(element) == select.values[0]: + break + if _i != len(self.stored_value): + self.stored_value.pop(_i) + + await interaction.response.edit_message( + content=f"Current list: [{', '.join(self.stored_value)}]", view=self.copy() + ) + self.stop() + + async def apply_addition(self, interaction: Interaction, item: str) -> None: + """Add an item to the list.""" + if item in self.stored_value: # Ignore duplicates + await interaction.response.defer() + return + + self.stored_value.append(item) + await interaction.response.edit_message( + content=f"Current list: [{', '.join(self.stored_value)}]", view=self.copy() + ) + self.stop() + + async def apply_edit(self, interaction: Interaction, new_list: str) -> None: + """Change the contents of the list.""" + self.stored_value = list(set(part.strip() for part in new_list.split(",") if part.strip())) + await interaction.response.edit_message(content=f"Current list: {self.stored_value}", view=self.copy()) + self.stop() + + @discord.ui.button(label="Add Value") + async def add_value(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to add an item to the list.""" + await interaction.response.send_modal(self.SingleItemModal(self)) + + @discord.ui.button(label="Free Input") + async def free_input(self, interaction: Interaction, button: discord.ui.Button) -> None: + """A button to change the entire list.""" + await interaction.response.send_modal(self.NewListModal(self)) + + @discord.ui.button(label="✅ Confirm", style=discord.ButtonStyle.green) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Send the final value to the embed editor.""" + # Edit first, it might time out otherwise. + await interaction.response.edit_message(content="✅ Edit confirmed", view=None) + await self.update_callback(setting_name=self.setting_name, setting_value=self.stored_value) + self.stop() + + @discord.ui.button(label="🚫 Cancel", style=discord.ButtonStyle.red) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the list editing.""" + await interaction.response.edit_message(content="🚫 Canceled", view=None) + self.stop() + + def copy(self) -> SequenceEditView: + """Return a copy of this view.""" + return SequenceEditView(self.setting_name, self.stored_value, self.update_callback) + + +class EnumSelectView(discord.ui.View): + """A view containing an instance of EnumSelect.""" + + class EnumSelect(discord.ui.Select): + """Select an enum value and send it to the supplied callback.""" + + def __init__(self, setting_name: str, enum_cls: EnumMeta, update_callback: Callable): + super().__init__(options=[SelectOption(label=elem.name) for elem in enum_cls]) + self.setting_name = setting_name + self.enum_cls = enum_cls + self.update_callback = update_callback + + async def callback(self, interaction: Interaction) -> Any: + """Respond to the interaction by sending the enum value to the update callback.""" + await interaction.response.edit_message(content="✅ Edit confirmed", view=None) + await self.update_callback(setting_name=self.setting_name, setting_value=self.values[0]) + + def __init__(self, setting_name: str, enum_cls: EnumMeta, update_callback: Callable): + super().__init__(timeout=COMPONENT_TIMEOUT) + self.add_item(self.EnumSelect(setting_name, enum_cls, update_callback)) + + +class EditBaseView(ABC, discord.ui.View): + """A view used to edit embed fields based on a provided type.""" + + def __init__(self, author: discord.User): + super().__init__(timeout=EDIT_TIMEOUT) + self.author = author + self.type_per_setting_name = {} + + async def interaction_check(self, interaction: Interaction) -> bool: + """Only allow interactions from the command invoker.""" + return interaction.user.id == self.author.id + + async def _prompt_new_value(self, interaction: Interaction, select: discord.ui.Select) -> None: + """Prompt the user to give an override value for the setting they selected, and respond to the interaction.""" + setting_name = select.values[0] + type_ = self.type_per_setting_name[setting_name] + if hasattr(type_, "__origin__"): # In case this is a types.GenericAlias or a typing._GenericAlias + type_ = type_.__origin__ + new_view = self.copy() + # This is in order to not block the interaction response. There's a potential race condition here, since + # a view's method is used without guaranteeing the task completed, but since it depends on user input + # realistically it shouldn't happen. + scheduling.create_task(interaction.message.edit(view=new_view)) + update_callback = partial(new_view.update_embed, interaction_or_msg=interaction.message) + if type_ is bool: + view = BooleanSelectView(setting_name, update_callback) + await interaction.response.send_message(f"Choose a value for `{setting_name}`:", view=view, ephemeral=True) + elif type_ in (set, list, tuple): + if (current_value := self.current_value(setting_name)) is not MISSING: + current_list = list(current_value) + else: + current_list = [] + await interaction.response.send_message( + f"Current list: [{', '.join(current_list)}]", + view=SequenceEditView(setting_name, current_list, update_callback), + ephemeral=True + ) + elif isinstance(type_, EnumMeta): + view = EnumSelectView(setting_name, type_, update_callback) + await interaction.response.send_message(f"Choose a value for `{setting_name}`:", view=view, ephemeral=True) + else: + await interaction.response.send_modal(FreeInputModal(setting_name, type_, update_callback)) + self.stop() + + @abstractmethod + def current_value(self, setting_name: str) -> Any: + """Get the current value stored for the setting or MISSING if none found.""" + + @abstractmethod + async def update_embed(self, interaction_or_msg: Interaction | discord.Message) -> None: + """ + Update the embed with the new information. + + If `interaction_or_msg` is a Message, the invoking Interaction must be deferred before calling this function. + """ + + @abstractmethod + def copy(self) -> EditBaseView: + """Create a copy of this view.""" + + +class DeleteConfirmationView(discord.ui.View): + """A view to confirm a deletion.""" + + def __init__(self, author: discord.Member | discord.User, callback: Callable): + super().__init__(timeout=DELETION_TIMEOUT) + self.author = author + self.callback = callback + + async def interaction_check(self, interaction: Interaction) -> bool: + """Only allow interactions from the command invoker.""" + return interaction.user.id == self.author.id + + @discord.ui.button(label="Delete", style=discord.ButtonStyle.red, row=0) + async def confirm(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Invoke the filter list deletion.""" + await interaction.response.edit_message(view=None) + await self.callback() + + @discord.ui.button(label="Cancel", row=0) + async def cancel(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Cancel the filter list deletion.""" + await interaction.response.edit_message(content="🚫 Operation canceled.", view=None) + + +class AlertView(discord.ui.View): + """A view providing info about the offending user.""" + + def __init__(self, ctx: FilterContext): + super().__init__(timeout=ALERT_VIEW_TIMEOUT) + self.ctx = ctx + + @discord.ui.button(label="ID") + async def user_id(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Reply with the ID of the offending user.""" + await interaction.response.send_message(self.ctx.author.id, ephemeral=True) + + @discord.ui.button(emoji="👤") + async def user_info(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Send the info embed of the offending user.""" + command = bot.instance.get_command("user") + if not command: + await interaction.response.send_message("The command `user` is not loaded.", ephemeral=True) + return + + await interaction.response.defer() + fake_ctx = FakeContext(interaction.message, interaction.channel, command, author=interaction.user) + # Get the most updated user/member object every time the button is pressed. + author = await get_or_fetch_member(interaction.guild, self.ctx.author.id) + if author is None: + author = await bot.instance.fetch_user(self.ctx.author.id) + await command(fake_ctx, author) + + @discord.ui.button(emoji="⚠") + async def user_infractions(self, interaction: Interaction, button: discord.ui.Button) -> None: + """Send the infractions embed of the offending user.""" + command = bot.instance.get_command("infraction search") + if not command: + await interaction.response.send_message("The command `infraction search` is not loaded.", ephemeral=True) + return + + await interaction.response.defer() + fake_ctx = FakeContext(interaction.message, interaction.channel, command, author=interaction.user) + await command(fake_ctx, self.ctx.author) diff --git a/bot/exts/filtering/_utils.py b/bot/exts/filtering/_utils.py new file mode 100644 index 000000000..da433330f --- /dev/null +++ b/bot/exts/filtering/_utils.py @@ -0,0 +1,224 @@ +import importlib +import importlib.util +import inspect +import pkgutil +import types +from abc import ABC, abstractmethod +from collections import defaultdict +from dataclasses import dataclass +from functools import cache +from typing import Any, Iterable, TypeVar, Union, get_args, get_origin + +import discord +import regex +from discord.ext.commands import Command + +import bot +from bot.bot import Bot +from bot.constants import Guild + +VARIATION_SELECTORS = r"\uFE00-\uFE0F\U000E0100-\U000E01EF" +INVISIBLE_RE = regex.compile(rf"[{VARIATION_SELECTORS}\p{{UNASSIGNED}}\p{{FORMAT}}\p{{CONTROL}}--\s]", regex.V1) +ZALGO_RE = regex.compile(rf"[\p{{NONSPACING MARK}}\p{{ENCLOSING MARK}}--[{VARIATION_SELECTORS}]]", regex.V1) + + +T = TypeVar('T') + + +def subclasses_in_package(package: str, prefix: str, parent: T) -> set[T]: + """Return all the subclasses of class `parent`, found in the top-level of `package`, given by absolute path.""" + subclasses = set() + + # Find all modules in the package. + for module_info in pkgutil.iter_modules([package], prefix): + if not module_info.ispkg: + module = importlib.import_module(module_info.name) + # Find all classes in each module... + for _, class_ in inspect.getmembers(module, inspect.isclass): + # That are a subclass of the given class. + if parent in class_.__mro__: + subclasses.add(class_) + + return subclasses + + +def clean_input(string: str) -> str: + """Remove zalgo and invisible characters from `string`.""" + # For future consideration: remove characters in the Mc, Sk, and Lm categories too. + # Can be normalised with form C to merge char + combining char into a single char to avoid + # removing legit diacritics, but this would open up a way to bypass _filters. + no_zalgo = ZALGO_RE.sub("", string) + return INVISIBLE_RE.sub("", no_zalgo) + + +def past_tense(word: str) -> str: + """Return the past tense form of the input word.""" + if not word: + return word + if word.endswith("e"): + return word + "d" + if word.endswith("y") and len(word) > 1 and word[-2] not in "aeiou": + return word[:-1] + "ied" + return word + "ed" + + +def to_serializable(item: Any) -> Union[bool, int, float, str, list, dict, None]: + """Convert the item into an object that can be converted to JSON.""" + if isinstance(item, (bool, int, float, str, type(None))): + return item + if isinstance(item, dict): + result = {} + for key, value in item.items(): + if not isinstance(key, (bool, int, float, str, type(None))): + key = str(key) + result[key] = to_serializable(value) + return result + if isinstance(item, Iterable): + return [to_serializable(subitem) for subitem in item] + return str(item) + + +@cache +def resolve_mention(mention: str) -> str: + """Return the appropriate formatting for the mention, be it a literal, a user ID, or a role ID.""" + guild = bot.instance.get_guild(Guild.id) + if mention in ("here", "everyone"): + return f"@{mention}" + try: + mention = int(mention) # It's an ID. + except ValueError: + pass + else: + if any(mention == role.id for role in guild.roles): + return f"<@&{mention}>" + else: + return f"<@{mention}>" + + # It's a name + for role in guild.roles: + if role.name == mention: + return role.mention + for member in guild.members: + if str(member) == mention: + return member.mention + return mention + + +def repr_equals(override: Any, default: Any) -> bool: + """Return whether the override and the default have the same representation.""" + if override is None: # It's not an override + return True + + override_is_sequence = isinstance(override, (tuple, list, set)) + default_is_sequence = isinstance(default, (tuple, list, set)) + if override_is_sequence != default_is_sequence: # One is a sequence and the other isn't. + return False + if override_is_sequence: + if len(override) != len(default): + return False + return all(str(item1) == str(item2) for item1, item2 in zip(set(override), set(default))) + return str(override) == str(default) + + +def starting_value(type_: type[T]) -> T: + """Return a value of the given type.""" + if get_origin(type_) in (Union, types.UnionType): # In case of a Union + args = get_args(type_) + if type(None) in args: + return None + type_ = args[0] # Pick one, doesn't matter + if origin := get_origin(type_): # In case of a parameterized List, Set, Dict etc. + type_ = origin + + try: + return type_() + except TypeError: # In case it all fails, return a string and let the user handle it. + return "" + + +class FieldRequiring(ABC): + """A mixin class that can force its concrete subclasses to set a value for specific class attributes.""" + + # Sentinel value that mustn't remain in a concrete subclass. + MUST_SET = object() + + # Sentinel value that mustn't remain in a concrete subclass. + # Overriding value must be unique in the subclasses of the abstract class in which the attribute was set. + MUST_SET_UNIQUE = object() + + # A mapping of the attributes which must be unique, and their unique values, per FieldRequiring subclass. + __unique_attributes: defaultdict[type, dict[str, set]] = defaultdict(dict) + + @abstractmethod + def __init__(self): + ... + + def __init_subclass__(cls, **kwargs): + def inherited(attr: str) -> bool: + """True if `attr` was inherited from a parent class.""" + for parent in cls.__mro__[1:-1]: # The first element is the class itself, last element is object. + if hasattr(parent, attr): # The attribute was inherited. + return True + return False + + # If a new attribute with the value MUST_SET_UNIQUE was defined in an abstract class, record it. + if inspect.isabstract(cls): + for attribute in dir(cls): + if getattr(cls, attribute, None) is FieldRequiring.MUST_SET_UNIQUE: + if not inherited(attribute): + # A new attribute with the value MUST_SET_UNIQUE. + FieldRequiring.__unique_attributes[cls][attribute] = set() + return + + for attribute in dir(cls): + if attribute.startswith("__") or attribute in ("MUST_SET", "MUST_SET_UNIQUE"): + continue + value = getattr(cls, attribute) + if value is FieldRequiring.MUST_SET and inherited(attribute): + raise ValueError(f"You must set attribute {attribute!r} when creating {cls!r}") + elif value is FieldRequiring.MUST_SET_UNIQUE and inherited(attribute): + raise ValueError(f"You must set a unique value to attribute {attribute!r} when creating {cls!r}") + else: + # Check if the value needs to be unique. + for parent in cls.__mro__[1:-1]: + # Find the parent class the attribute was first defined in. + if attribute in FieldRequiring.__unique_attributes[parent]: + if value in FieldRequiring.__unique_attributes[parent][attribute]: + raise ValueError(f"Value of {attribute!r} in {cls!r} is not unique for parent {parent!r}.") + else: + # Add to the set of unique values for that field. + FieldRequiring.__unique_attributes[parent][attribute].add(value) + + +@dataclass +class FakeContext: + """ + A class representing a context-like object that can be sent to infraction commands. + + The goal is to be able to apply infractions without depending on the existence of a message or an interaction + (which are the two ways to create a Context), e.g. in API events which aren't message-driven, or in custom filtering + events. + """ + + message: discord.Message + channel: discord.abc.Messageable + command: Command | None + bot: Bot | None = None + guild: discord.Guild | None = None + author: discord.Member | discord.User | None = None + me: discord.Member | None = None + + def __post_init__(self): + """Initialize the missing information.""" + if not self.bot: + self.bot = bot.instance + if not self.guild: + self.guild = self.bot.get_guild(Guild.id) + if not self.me: + self.me = self.guild.me + if not self.author: + self.author = self.me + + async def send(self, *args, **kwargs) -> discord.Message: + """A wrapper for channel.send.""" + return await self.channel.send(*args, **kwargs) diff --git a/bot/exts/filtering/filtering.py b/bot/exts/filtering/filtering.py new file mode 100644 index 000000000..c4417e5e0 --- /dev/null +++ b/bot/exts/filtering/filtering.py @@ -0,0 +1,1424 @@ +import datetime +import json +import re +import unicodedata +from collections import defaultdict +from collections.abc import Iterable, Mapping +from functools import partial, reduce +from io import BytesIO +from operator import attrgetter +from typing import Literal, Optional, get_type_hints + +import arrow +import discord +from async_rediscache import RedisCache +from discord import Colour, Embed, HTTPException, Message, MessageType +from discord.ext import commands, tasks +from discord.ext.commands import BadArgument, Cog, Context, command, has_any_role +from pydis_core.site_api import ResponseCodeError +from pydis_core.utils import scheduling + +import bot +import bot.exts.filtering._ui.filter as filters_ui +from bot import constants +from bot.bot import Bot +from bot.constants import Channels, Guild, MODERATION_ROLES, Roles +from bot.exts.backend.branding._repository import HEADERS, PARAMS +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists import FilterList, ListType, filter_list_types, list_type_converter +from bot.exts.filtering._filter_lists.filter_list import AtomicList +from bot.exts.filtering._filters.filter import Filter, UniqueFilter +from bot.exts.filtering._settings import ActionSettings +from bot.exts.filtering._settings_types.actions.infraction_and_notification import Infraction +from bot.exts.filtering._ui.filter import ( + build_filter_repr_dict, description_and_settings_converter, filter_serializable_overrides, populate_embed_from_dict +) +from bot.exts.filtering._ui.filter_list import FilterListAddView, FilterListEditView, settings_converter +from bot.exts.filtering._ui.search import SearchEditView, search_criteria_converter +from bot.exts.filtering._ui.ui import ( + AlertView, ArgumentCompletionView, DeleteConfirmationView, build_mod_alert, format_response_error +) +from bot.exts.filtering._utils import past_tense, repr_equals, starting_value, to_serializable +from bot.exts.moderation.infraction.infractions import COMP_BAN_DURATION, COMP_BAN_REASON +from bot.log import get_logger +from bot.pagination import LinePaginator +from bot.utils.channel import is_mod_channel +from bot.utils.lock import lock_arg +from bot.utils.message_cache import MessageCache + +log = get_logger(__name__) + +WEBHOOK_ICON_URL = r"https://github.com/python-discord/branding/raw/main/icons/filter/filter_pfp.png" +WEBHOOK_NAME = "Filtering System" +CACHE_SIZE = 1000 +HOURS_BETWEEN_NICKNAME_ALERTS = 1 +OFFENSIVE_MSG_DELETE_TIME = datetime.timedelta(days=7) +WEEKLY_REPORT_ISO_DAY = 3 # 1=Monday, 7=Sunday + + +class Filtering(Cog): + """Filtering and alerting for content posted on the server.""" + + # A set of filter list names with missing implementations that already caused a warning. + already_warned = set() + + # Redis cache mapping a user ID to the last timestamp a bad nickname alert was sent. + name_alerts = RedisCache() + + # region: init + + def __init__(self, bot: Bot): + self.bot = bot + self.filter_lists: dict[str, FilterList] = {} + self._subscriptions: defaultdict[Event, list[FilterList]] = defaultdict(list) + self.delete_scheduler = scheduling.Scheduler(self.__class__.__name__) + self.webhook: discord.Webhook | None = None + + self.loaded_settings = {} + self.loaded_filters = {} + self.loaded_filter_settings = {} + + self.message_cache = MessageCache(CACHE_SIZE, newest_first=True) + + async def cog_load(self) -> None: + """ + Fetch the filter data from the API, parse it, and load it to the appropriate data structures. + + Additionally, fetch the alerting webhook. + """ + await self.bot.wait_until_guild_available() + + log.trace("Loading filtering information from the database.") + raw_filter_lists = await self.bot.api_client.get("bot/filter/filter_lists") + example_list = None + for raw_filter_list in raw_filter_lists: + loaded_list = self._load_raw_filter_list(raw_filter_list) + if not example_list and loaded_list: + example_list = loaded_list + + # The webhook must be generated by the bot to send messages with components through it. + self.webhook = await self._fetch_or_generate_filtering_webhook() + + self.collect_loaded_types(example_list) + await self.schedule_offending_messages_deletion() + self.weekly_auto_infraction_report_task.start() + + def subscribe(self, filter_list: FilterList, *events: Event) -> None: + """ + Subscribe a filter list to the given events. + + The filter list is added to a list for each event. When the event is triggered, the filter context will be + dispatched to the subscribed filter lists. + + While it's possible to just make each filter list check the context's event, these are only the events a filter + list expects to receive from the filtering cog, there isn't an actual limitation on the kinds of events a filter + list can handle as long as the filter context is built properly. If for whatever reason we want to invoke a + filter list outside of the usual procedure with the filtering cog, it will be more problematic if the events are + hard-coded into each filter list. + """ + for event in events: + if filter_list not in self._subscriptions[event]: + self._subscriptions[event].append(filter_list) + + def unsubscribe(self, filter_list: FilterList, *events: Event) -> None: + """Unsubscribe a filter list from the given events. If no events given, unsubscribe from every event.""" + if not events: + events = list(self._subscriptions) + + for event in events: + if filter_list in self._subscriptions.get(event, []): + self._subscriptions[event].remove(filter_list) + + def collect_loaded_types(self, example_list: AtomicList) -> None: + """ + Go over the classes used in initialization and collect them to dictionaries. + + The information that is collected is about the types actually used to load the API response, not all types + available in the filtering extension. + + Any filter list has the fields for all settings in the DB schema, so picking any one of them is enough. + """ + # Get the filter types used by each filter list. + for filter_list in self.filter_lists.values(): + self.loaded_filters.update({filter_type.name: filter_type for filter_type in filter_list.filter_types}) + + # Get the setting types used by each filter list. + if self.filter_lists: + settings_entries = set() + # The settings are split between actions and validations. + for settings_group in example_list.defaults: + settings_entries.update(type(setting) for _, setting in settings_group.items()) + + for setting_entry in settings_entries: + type_hints = get_type_hints(setting_entry) + # The description should be either a string or a dictionary. + if isinstance(setting_entry.description, str): + # If it's a string, then the settings entry matches a single field in the DB, + # and its name is the setting type's name attribute. + self.loaded_settings[setting_entry.name] = ( + setting_entry.description, setting_entry, type_hints[setting_entry.name] + ) + else: + # Otherwise, the setting entry works with compound settings. + self.loaded_settings.update({ + subsetting: (description, setting_entry, type_hints[subsetting]) + for subsetting, description in setting_entry.description.items() + }) + + # Get the settings per filter as well. + for filter_name, filter_type in self.loaded_filters.items(): + extra_fields_type = filter_type.extra_fields_type + if not extra_fields_type: + continue + type_hints = get_type_hints(extra_fields_type) + # A class var with a `_description` suffix is expected per field name. + self.loaded_filter_settings[filter_name] = { + field_name: ( + getattr(extra_fields_type, f"{field_name}_description", ""), + extra_fields_type, + type_hints[field_name] + ) + for field_name in extra_fields_type.__fields__ + } + + async def schedule_offending_messages_deletion(self) -> None: + """Load the messages that need to be scheduled for deletion from the database.""" + response = await self.bot.api_client.get('bot/offensive-messages') + + now = arrow.utcnow() + for msg in response: + delete_at = arrow.get(msg['delete_date']) + if delete_at < now: + await self._delete_offensive_msg(msg) + else: + self._schedule_msg_delete(msg) + + async def cog_check(self, ctx: Context) -> bool: + """Only allow moderators to invoke the commands in this cog.""" + return await has_any_role(*MODERATION_ROLES).predicate(ctx) + + # endregion + # region: listeners and event handlers + + @Cog.listener() + async def on_message(self, msg: Message) -> None: + """Filter the contents of a sent message.""" + if msg.author.bot or msg.webhook_id or msg.type == MessageType.auto_moderation_action: + return + self.message_cache.append(msg) + + ctx = FilterContext.from_message(Event.MESSAGE, msg, None, self.message_cache) + result_actions, list_messages, triggers = await self._resolve_action(ctx) + self.message_cache.update(msg, metadata=triggers) + if result_actions: + await result_actions.action(ctx) + if ctx.send_alert: + await self._send_alert(ctx, list_messages) + + nick_ctx = FilterContext.from_message(Event.NICKNAME, msg) + nick_ctx.content = msg.author.display_name + await self._check_bad_name(nick_ctx) + + await self._maybe_schedule_msg_delete(ctx, result_actions) + self._increment_stats(triggers) + + @Cog.listener() + async def on_message_edit(self, before: discord.Message, after: discord.Message) -> None: + """Filter the contents of an edited message. Don't reinvoke filters already invoked on the `before` version.""" + # Only check changes to the message contents/attachments and embed additions, not pin status etc. + if all(( + before.content == after.content, # content hasn't changed + before.attachments == after.attachments, # attachments haven't changed + len(before.embeds) >= len(after.embeds) # embeds haven't been added + )): + return + + # Update the cache first, it might be used by the antispam filter. + # No need to update the triggers, they're going to be updated inside the sublists if necessary. + self.message_cache.update(after) + ctx = FilterContext.from_message(Event.MESSAGE_EDIT, after, before, self.message_cache) + result_actions, list_messages, triggers = await self._resolve_action(ctx) + if result_actions: + await result_actions.action(ctx) + if ctx.send_alert: + await self._send_alert(ctx, list_messages) + await self._maybe_schedule_msg_delete(ctx, result_actions) + self._increment_stats(triggers) + + @Cog.listener() + async def on_voice_state_update(self, member: discord.Member, *_) -> None: + """Checks for bad words in usernames when users join, switch or leave a voice channel.""" + ctx = FilterContext(Event.NICKNAME, member, None, member.display_name, None) + await self._check_bad_name(ctx) + + async def filter_snekbox_output(self, snekbox_result: str, msg: Message) -> bool: + """ + Filter the result of a snekbox command to see if it violates any of our rules, and then respond accordingly. + + Also requires the original message, to check whether to filter and for alerting. + Any action (deletion, infraction) will be applied in the context of the original message. + + Returns whether a filter was triggered or not. + """ + ctx = FilterContext.from_message(Event.MESSAGE, msg).replace(content=snekbox_result) + result_actions, list_messages, triggers = await self._resolve_action(ctx) + if result_actions: + await result_actions.action(ctx) + if ctx.send_alert: + await self._send_alert(ctx, list_messages) + self._increment_stats(triggers) + + return result_actions is not None + + # endregion + # region: blacklist commands + + @commands.group(aliases=("bl", "blacklist", "denylist", "dl")) + async def blocklist(self, ctx: Context) -> None: + """Group for managing blacklisted items.""" + if not ctx.invoked_subcommand: + await ctx.send_help(ctx.command) + + @blocklist.command(name="list", aliases=("get",)) + async def bl_list(self, ctx: Context, list_name: Optional[str] = None) -> None: + """List the contents of a specified blacklist.""" + result = await self._resolve_list_type_and_name(ctx, ListType.DENY, list_name, exclude="list_type") + if not result: + return + list_type, filter_list = result + await self._send_list(ctx, filter_list, list_type) + + @blocklist.command(name="add", aliases=("a",)) + async def bl_add( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + list_name: Optional[str], + content: str, + *, + description_and_settings: Optional[str] = None + ) -> None: + """ + Add a blocked filter to the specified filter list. + + Unless `noui` is specified, a UI will be provided to edit the content, description, and settings + before confirmation. + + The settings can be provided in the command itself, in the format of `setting_name=value` (no spaces around the + equal sign). The value doesn't need to (shouldn't) be surrounded in quotes even if it contains spaces. + """ + result = await self._resolve_list_type_and_name(ctx, ListType.DENY, list_name, exclude="list_type") + if result is None: + return + list_type, filter_list = result + await self._add_filter(ctx, noui, list_type, filter_list, content, description_and_settings) + + # endregion + # region: whitelist commands + + @commands.group(aliases=("wl", "whitelist", "al")) + async def allowlist(self, ctx: Context) -> None: + """Group for managing blacklisted items.""" + if not ctx.invoked_subcommand: + await ctx.send_help(ctx.command) + + @allowlist.command(name="list", aliases=("get",)) + async def al_list(self, ctx: Context, list_name: Optional[str] = None) -> None: + """List the contents of a specified whitelist.""" + result = await self._resolve_list_type_and_name(ctx, ListType.ALLOW, list_name, exclude="list_type") + if not result: + return + list_type, filter_list = result + await self._send_list(ctx, filter_list, list_type) + + @allowlist.command(name="add", aliases=("a",)) + async def al_add( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + list_name: Optional[str], + content: str, + *, + description_and_settings: Optional[str] = None + ) -> None: + """ + Add an allowed filter to the specified filter list. + + Unless `noui` is specified, a UI will be provided to edit the content, description, and settings + before confirmation. + + The settings can be provided in the command itself, in the format of `setting_name=value` (no spaces around the + equal sign). The value doesn't need to (shouldn't) be surrounded in quotes even if it contains spaces. + """ + result = await self._resolve_list_type_and_name(ctx, ListType.ALLOW, list_name, exclude="list_type") + if result is None: + return + list_type, filter_list = result + await self._add_filter(ctx, noui, list_type, filter_list, content, description_and_settings) + + # endregion + # region: filter commands + + @commands.group(aliases=("filters", "f"), invoke_without_command=True) + async def filter(self, ctx: Context, id_: Optional[int] = None) -> None: + """ + Group for managing filters. + + If a valid filter ID is provided, an embed describing the filter will be posted. + """ + if not ctx.invoked_subcommand and not id_: + await ctx.send_help(ctx.command) + return + + result = self._get_filter_by_id(id_) + if result is None: + await ctx.send(f":x: Could not find a filter with ID `{id_}`.") + return + filter_, filter_list, list_type = result + + overrides_values, extra_fields_overrides = filter_serializable_overrides(filter_) + + all_settings_repr_dict = build_filter_repr_dict( + filter_list, list_type, type(filter_), overrides_values, extra_fields_overrides + ) + embed = Embed(colour=Colour.blue()) + populate_embed_from_dict(embed, all_settings_repr_dict) + embed.description = f"`{filter_.content}`" + if filter_.description: + embed.description += f" - {filter_.description}" + embed.set_author(name=f"Filter {id_} - " + f"{filter_list[list_type].label}".title()) + embed.set_footer(text=( + "Field names with an asterisk have values which override the defaults of the containing filter list. " + f"To view all defaults of the list, " + f"run `{constants.Bot.prefix}filterlist describe {list_type.name} {filter_list.name}`." + )) + await ctx.send(embed=embed) + + @filter.command(name="list", aliases=("get",)) + async def f_list( + self, ctx: Context, list_type: Optional[list_type_converter] = None, list_name: Optional[str] = None + ) -> None: + """List the contents of a specified list of filters.""" + result = await self._resolve_list_type_and_name(ctx, list_type, list_name) + if result is None: + return + list_type, filter_list = result + + await self._send_list(ctx, filter_list, list_type) + + @filter.command(name="describe", aliases=("explain", "manual")) + async def f_describe(self, ctx: Context, filter_name: Optional[str]) -> None: + """Show a description of the specified filter, or a list of possible values if no name is specified.""" + if not filter_name: + filter_names = [f"» {f}" for f in self.loaded_filters] + embed = Embed(colour=Colour.blue()) + embed.set_author(name="List of filter names") + await LinePaginator.paginate(filter_names, ctx, embed, max_lines=10, empty=False) + else: + filter_type = self.loaded_filters.get(filter_name) + if not filter_type: + filter_type = self.loaded_filters.get(filter_name[:-1]) # A plural form or a typo. + if not filter_type: + await ctx.send(f":x: There's no filter type named {filter_name!r}.") + return + # Use the class's docstring, and ignore single newlines. + embed = Embed(description=re.sub(r"(?<!\n)\n(?!\n)", " ", filter_type.__doc__), colour=Colour.blue()) + embed.set_author(name=f"Description of the {filter_name} filter") + await ctx.send(embed=embed) + + @filter.command(name="add", aliases=("a",)) + async def f_add( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + list_type: Optional[list_type_converter], + list_name: Optional[str], + content: str, + *, + description_and_settings: Optional[str] = None + ) -> None: + """ + Add a filter to the specified filter list. + + Unless `noui` is specified, a UI will be provided to edit the content, description, and settings + before confirmation. + + The settings can be provided in the command itself, in the format of `setting_name=value` (no spaces around the + equal sign). The value doesn't need to (shouldn't) be surrounded in quotes even if it contains spaces. + + A template filter can be specified in the settings area to copy overrides from. The setting name is "--template" + and the value is the filter ID. The template will be used before applying any other override. + + Example: `!filter add denied token "Scaleios is great" remove_context=True send_alert=False --template=100` + """ + result = await self._resolve_list_type_and_name(ctx, list_type, list_name) + if result is None: + return + list_type, filter_list = result + await self._add_filter(ctx, noui, list_type, filter_list, content, description_and_settings) + + @filter.command(name="edit", aliases=("e",)) + async def f_edit( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + filter_id: int, + *, + description_and_settings: Optional[str] = None + ) -> None: + """ + Edit a filter specified by its ID. + + Unless `noui` is specified, a UI will be provided to edit the content, description, and settings + before confirmation. + + The settings can be provided in the command itself, in the format of `setting_name=value` (no spaces around the + equal sign). The value doesn't need to (shouldn't) be surrounded in quotes even if it contains spaces. + + A template filter can be specified in the settings area to copy overrides from. The setting name is "--template" + and the value is the filter ID. The template will be used before applying any other override. + + To edit the filter's content, use the UI. + """ + result = self._get_filter_by_id(filter_id) + if result is None: + await ctx.send(f":x: Could not find a filter with ID `{filter_id}`.") + return + filter_, filter_list, list_type = result + filter_type = type(filter_) + settings, filter_settings = filter_serializable_overrides(filter_) + description, new_settings, new_filter_settings = description_and_settings_converter( + filter_list, + list_type, filter_type, + self.loaded_settings, + self.loaded_filter_settings, + description_and_settings + ) + + content = filter_.content + description = description or filter_.description + settings.update(new_settings) + filter_settings.update(new_filter_settings) + patch_func = partial(self._patch_filter, filter_) + + if noui: + try: + await patch_func( + ctx.message, filter_list, list_type, filter_type, content, description, settings, filter_settings + ) + except ResponseCodeError as e: + await ctx.reply(embed=format_response_error(e)) + return + + embed = Embed(colour=Colour.blue()) + embed.description = f"`{filter_.content}`" + if description: + embed.description += f" - {description}" + embed.set_author( + name=f"Filter {filter_id} - {filter_list[list_type].label}".title()) + embed.set_footer(text=( + "Field names with an asterisk have values which override the defaults of the containing filter list. " + f"To view all defaults of the list, " + f"run `{constants.Bot.prefix}filterlist describe {list_type.name} {filter_list.name}`." + )) + + view = filters_ui.FilterEditView( + filter_list, + list_type, + filter_type, + content, + description, + settings, + filter_settings, + self.loaded_settings, + self.loaded_filter_settings, + ctx.author, + embed, + patch_func + ) + await ctx.send(embed=embed, reference=ctx.message, view=view) + + @filter.command(name="delete", aliases=("d", "remove")) + async def f_delete(self, ctx: Context, filter_id: int) -> None: + """Delete the filter specified by its ID.""" + async def delete_list() -> None: + """The actual removal routine.""" + await bot.instance.api_client.delete(f'bot/filter/filters/{filter_id}') + log.info(f"Successfully deleted filter with ID {filter_id}.") + filter_list[list_type].filters.pop(filter_id) + await ctx.reply(f"✅ Deleted filter: {filter_}") + + result = self._get_filter_by_id(filter_id) + if result is None: + await ctx.send(f":x: Could not find a filter with ID `{filter_id}`.") + return + filter_, filter_list, list_type = result + await ctx.reply( + f"Are you sure you want to delete filter {filter_}?", + view=DeleteConfirmationView(ctx.author, delete_list) + ) + + @filter.command(aliases=("settings",)) + async def setting(self, ctx: Context, setting_name: str | None) -> None: + """Show a description of the specified setting, or a list of possible settings if no name is specified.""" + if not setting_name: + settings_list = [f"» {setting_name}" for setting_name in self.loaded_settings] + for filter_name, filter_settings in self.loaded_filter_settings.items(): + settings_list.extend(f"» {filter_name}/{setting}" for setting in filter_settings) + embed = Embed(colour=Colour.blue()) + embed.set_author(name="List of setting names") + await LinePaginator.paginate(settings_list, ctx, embed, max_lines=10, empty=False) + + else: + # The setting is either in a SettingsEntry subclass, or a pydantic model. + setting_data = self.loaded_settings.get(setting_name) + description = None + if setting_data: + description = setting_data[0] + elif "/" in setting_name: # It's a filter specific setting. + filter_name, filter_setting_name = setting_name.split("/", maxsplit=1) + if filter_name in self.loaded_filter_settings: + if filter_setting_name in self.loaded_filter_settings[filter_name]: + description = self.loaded_filter_settings[filter_name][filter_setting_name][0] + if description is None: + await ctx.send(f":x: There's no setting type named {setting_name!r}.") + return + embed = Embed(colour=Colour.blue(), description=description) + embed.set_author(name=f"Description of the {setting_name} setting") + await ctx.send(embed=embed) + + @filter.command(name="match") + async def f_match( + self, ctx: Context, no_user: bool | None, message: Message | None, *, string: str | None + ) -> None: + """ + Post any responses from the filter lists for the given message or string. + + If there's a `message`, the `string` will be ignored. Note that if a `message` is provided, it will go through + all validations appropriate to where it was sent and who sent it. To check for matches regardless of the author + (for example if the message was sent by another staff member or yourself) set `no_user` to '1' or 'True'. + + If a `string` is provided, it will be validated in the context of a user with no roles in python-general. + """ + if not message and not string: + raise BadArgument("Please provide input.") + if message: + user = None if no_user else message.author + filter_ctx = FilterContext(Event.MESSAGE, user, message.channel, message.content, message, message.embeds) + else: + python_general = ctx.guild.get_channel(Channels.python_general) + filter_ctx = FilterContext(Event.MESSAGE, None, python_general, string, None) + + _, _, triggers = await self._resolve_action(filter_ctx) + lines = [] + for sublist, sublist_triggers in triggers.items(): + if sublist_triggers: + triggers_repr = map(str, sublist_triggers) + lines.extend([f"**{sublist.label.title()}s**", *triggers_repr, "\n"]) + lines = lines[:-1] # Remove last newline. + + embed = Embed(colour=Colour.blue(), title="Match results") + await LinePaginator.paginate(lines, ctx, embed, max_lines=10, empty=False) + + @filter.command(name="search") + async def f_search( + self, + ctx: Context, + noui: Literal["noui"] | None, + filter_type_name: str | None, + *, + settings: str = "" + ) -> None: + """ + Find filters with the provided settings. The format is identical to that of the add and edit commands. + + If a list type and/or a list name are provided, the search will be limited to those parameters. A list name must + be provided in order to search by filter-specific settings. + """ + filter_type = None + if filter_type_name: + filter_type_name = filter_type_name.lower() + filter_type = self.loaded_filters.get(filter_type_name) + if not filter_type: + self.loaded_filters.get(filter_type_name[:-1]) # In case the user tried to specify the plural form. + # If settings were provided with no filter_type, discord.py will capture the first word as the filter type. + if filter_type is None and filter_type_name is not None: + if settings: + settings = f"{filter_type_name} {settings}" + else: + settings = filter_type_name + filter_type_name = None + + settings, filter_settings, filter_type = search_criteria_converter( + self.filter_lists, + self.loaded_filters, + self.loaded_settings, + self.loaded_filter_settings, + filter_type, + settings + ) + + if noui: + await self._search_filters(ctx.message, filter_type, settings, filter_settings) + return + + embed = Embed(colour=Colour.blue()) + view = SearchEditView( + filter_type, + settings, + filter_settings, + self.filter_lists, + self.loaded_filters, + self.loaded_settings, + self.loaded_filter_settings, + ctx.author, + embed, + self._search_filters + ) + await ctx.send(embed=embed, reference=ctx.message, view=view) + + @filter.command(root_aliases=("compfilter", "compf")) + async def compadd( + self, ctx: Context, list_name: Optional[str], content: str, *, description: Optional[str] = "Phishing" + ) -> None: + """Add a filter to detect a compromised account. Will apply the equivalent of a compban if triggered.""" + result = await self._resolve_list_type_and_name(ctx, ListType.DENY, list_name, exclude="list_type") + if result is None: + return + list_type, filter_list = result + + settings = ( + "remove_context=True " + "dm_pings=Moderators " + "infraction_type=BAN " + "infraction_channel=1 " # Post the ban in #mod-alerts + f"infraction_duration={COMP_BAN_DURATION.total_seconds()} " + f"infraction_reason={COMP_BAN_REASON}" + ) + description_and_settings = f"{description} {settings}" + await self._add_filter(ctx, "noui", list_type, filter_list, content, description_and_settings) + + # endregion + # region: filterlist group + + @commands.group(aliases=("fl",)) + async def filterlist(self, ctx: Context) -> None: + """Group for managing filter lists.""" + if not ctx.invoked_subcommand: + await ctx.send_help(ctx.command) + + @filterlist.command(name="describe", aliases=("explain", "manual", "id")) + async def fl_describe( + self, ctx: Context, list_type: Optional[list_type_converter] = None, list_name: Optional[str] = None + ) -> None: + """Show a description of the specified filter list, or a list of possible values if no values are provided.""" + if not list_type and not list_name: + list_names = [f"» {fl}" for fl in self.filter_lists] + embed = Embed(colour=Colour.blue()) + embed.set_author(name="List of filter lists names") + await LinePaginator.paginate(list_names, ctx, embed, max_lines=10, empty=False) + return + + result = await self._resolve_list_type_and_name(ctx, list_type, list_name) + if result is None: + return + list_type, filter_list = result + + setting_values = {} + for settings_group in filter_list[list_type].defaults: + for _, setting in settings_group.items(): + setting_values.update(to_serializable(setting.dict())) + + embed = Embed(colour=Colour.blue()) + populate_embed_from_dict(embed, setting_values) + # Use the class's docstring, and ignore single newlines. + embed.description = re.sub(r"(?<!\n)\n(?!\n)", " ", filter_list.__doc__) + embed.set_author( + name=f"Description of the {filter_list[list_type].label} filter list" + ) + await ctx.send(embed=embed) + + @filterlist.command(name="add", aliases=("a",)) + @has_any_role(Roles.admins) + async def fl_add(self, ctx: Context, list_type: list_type_converter, list_name: str) -> None: + """Add a new filter list.""" + # Check if there's an implementation. + if list_name.lower() not in filter_list_types: + if list_name.lower()[:-1] not in filter_list_types: # Maybe the name was given with uppercase or in plural? + await ctx.reply(f":x: Cannot add a `{list_name}` filter list, as there is no matching implementation.") + return + else: + list_name = list_name.lower()[:-1] + + # Check it doesn't already exist. + list_description = f"{past_tense(list_type.name.lower())} {list_name.lower()}" + if list_name in self.filter_lists: + filter_list = self.filter_lists[list_name] + if list_type in filter_list: + await ctx.reply(f":x: The {list_description} filter list already exists.") + return + + embed = Embed(colour=Colour.blue()) + embed.set_author(name=f"New Filter List - {list_description.title()}") + settings = {name: starting_value(value[2]) for name, value in self.loaded_settings.items()} + + view = FilterListAddView( + list_name, + list_type, + settings, + self.loaded_settings, + ctx.author, + embed, + self._post_filter_list + ) + await ctx.send(embed=embed, reference=ctx.message, view=view) + + @filterlist.command(name="edit", aliases=("e",)) + @has_any_role(Roles.admins) + async def fl_edit( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + list_type: Optional[list_type_converter] = None, + list_name: Optional[str] = None, + *, + settings: str | None + ) -> None: + """ + Edit the filter list. + + Unless `noui` is specified, a UI will be provided to edit the settings before confirmation. + + The settings can be provided in the command itself, in the format of `setting_name=value` (no spaces around the + equal sign). The value doesn't need to (shouldn't) be surrounded in quotes even if it contains spaces. + """ + result = await self._resolve_list_type_and_name(ctx, list_type, list_name) + if result is None: + return + list_type, filter_list = result + settings = settings_converter(self.loaded_settings, settings) + if noui: + try: + await self._patch_filter_list(ctx.message, filter_list, list_type, settings) + except ResponseCodeError as e: + await ctx.reply(embed=format_response_error(e)) + return + + embed = Embed(colour=Colour.blue()) + embed.set_author(name=f"{filter_list[list_type].label.title()} Filter List") + embed.set_footer(text="Field names with a ~ have values which change the existing value in the filter list.") + + view = FilterListEditView( + filter_list, + list_type, + settings, + self.loaded_settings, + ctx.author, + embed, + self._patch_filter_list + ) + await ctx.send(embed=embed, reference=ctx.message, view=view) + + @filterlist.command(name="delete", aliases=("remove",)) + @has_any_role(Roles.admins) + async def fl_delete( + self, ctx: Context, list_type: Optional[list_type_converter] = None, list_name: Optional[str] = None + ) -> None: + """Remove the filter list and all of its filters from the database.""" + async def delete_list() -> None: + """The actual removal routine.""" + list_data = await bot.instance.api_client.get(f"bot/filter/filter_lists/{list_id}") + file = discord.File(BytesIO(json.dumps(list_data, indent=4).encode("utf-8")), f"{list_description}.json") + message = await ctx.send("⏳ Annihilation in progress, please hold...", file=file) + # Unload the filter list. + filter_list.pop(list_type) + if not filter_list: # There's nothing left, remove from the cog. + self.filter_lists.pop(filter_list.name) + self.unsubscribe(filter_list) + + await bot.instance.api_client.delete(f"bot/filter/filter_lists/{list_id}") + log.info(f"Successfully deleted the {filter_list[list_type].label} filterlist.") + await message.edit(content=f"✅ The {list_description} list has been deleted.") + + result = await self._resolve_list_type_and_name(ctx, list_type, list_name) + if result is None: + return + list_type, filter_list = result + list_id = filter_list[list_type].id + list_description = filter_list[list_type].label + await ctx.reply( + f"Are you sure you want to delete the {list_description} list?", + view=DeleteConfirmationView(ctx.author, delete_list) + ) + + # endregion + # region: utility commands + + @command(name="filter_report") + async def force_send_weekly_report(self, ctx: Context) -> None: + """Respond with a list of auto-infractions added in the last 7 days.""" + await self.send_weekly_auto_infraction_report(ctx.channel) + + # endregion + # region: helper functions + + def _load_raw_filter_list(self, list_data: dict) -> AtomicList | None: + """Load the raw list data to the cog.""" + list_name = list_data["name"] + if list_name not in self.filter_lists: + if list_name not in filter_list_types: + if list_name not in self.already_warned: + log.warning( + f"A filter list named {list_name} was loaded from the database, but no matching class." + ) + self.already_warned.add(list_name) + return None + self.filter_lists[list_name] = filter_list_types[list_name](self) + return self.filter_lists[list_name].add_list(list_data) + + async def _fetch_or_generate_filtering_webhook(self) -> discord.Webhook | None: + """Generate a webhook with the filtering avatar.""" + alerts_channel = self.bot.get_guild(Guild.id).get_channel(Channels.mod_alerts) + # Try to find an existing webhook. + for webhook in await alerts_channel.webhooks(): + if webhook.name == WEBHOOK_NAME and webhook.user == self.bot.user and webhook.is_authenticated(): + log.trace(f"Found existing filters webhook with ID {webhook.id}.") + return webhook + + # Download the filtering avatar from the branding repository. + webhook_icon = None + async with self.bot.http_session.get(WEBHOOK_ICON_URL, params=PARAMS, headers=HEADERS) as response: + if response.status == 200: + log.debug("Successfully fetched filtering webhook icon, reading payload.") + webhook_icon = await response.read() + else: + log.warning(f"Failed to fetch filtering webhook icon due to status: {response.status}") + + # Generate a new webhook. + try: + webhook = await alerts_channel.create_webhook(name=WEBHOOK_NAME, avatar=webhook_icon) + log.trace(f"Generated new filters webhook with ID {webhook.id},") + return webhook + except HTTPException as e: + log.error(f"Failed to create filters webhook: {e}") + return None + + async def _resolve_action( + self, ctx: FilterContext + ) -> tuple[ActionSettings | None, dict[FilterList, list[str]], dict[AtomicList, list[Filter]]]: + """ + Return the actions that should be taken for all filter lists in the given context. + + Additionally, a message is possibly provided from each filter list describing the triggers, + which should be relayed to the moderators. + """ + actions = [] + messages = {} + triggers = {} + for filter_list in self._subscriptions[ctx.event]: + list_actions, list_message, list_triggers = await filter_list.actions_for(ctx) + triggers.update({filter_list[list_type]: filters for list_type, filters in list_triggers.items()}) + if list_actions: + actions.append(list_actions) + if list_message: + messages[filter_list] = list_message + + result_actions = None + if actions: + result_actions = reduce(ActionSettings.union, actions) + + return result_actions, messages, triggers + + async def _send_alert(self, ctx: FilterContext, triggered_filters: dict[FilterList, Iterable[str]]) -> None: + """Build an alert message from the filter context, and send it via the alert webhook.""" + if not self.webhook: + return + + name = f"{ctx.event.name.replace('_', ' ').title()} Filter" + embed = await build_mod_alert(ctx, triggered_filters) + # There shouldn't be more than 10, but if there are it's not very useful to send them all. + await self.webhook.send( + username=name, content=ctx.alert_content, embeds=[embed, *ctx.alert_embeds][:10], view=AlertView(ctx) + ) + + def _increment_stats(self, triggered_filters: dict[AtomicList, list[Filter]]) -> None: + """Increment the stats for every filter triggered.""" + for filters in triggered_filters.values(): + for filter_ in filters: + if isinstance(filter_, UniqueFilter): + self.bot.stats.incr(f"filters.{filter_.name}") + + async def _recently_alerted_name(self, member: discord.Member) -> bool: + """When it hasn't been `HOURS_BETWEEN_NICKNAME_ALERTS` since last alert, return False, otherwise True.""" + if last_alert := await self.name_alerts.get(member.id): + last_alert = arrow.get(last_alert) + if arrow.utcnow() - last_alert < datetime.timedelta(days=HOURS_BETWEEN_NICKNAME_ALERTS): + log.trace(f"Last alert was too recent for {member}'s nickname.") + return True + + return False + + @lock_arg("filtering.check_bad_name", "ctx", attrgetter("author.id")) + async def _check_bad_name(self, ctx: FilterContext) -> None: + """Check filter triggers in the passed context - a member's display name.""" + if await self._recently_alerted_name(ctx.author): + return + + name = ctx.content + normalised_name = unicodedata.normalize("NFKC", name) + cleaned_normalised_name = "".join([c for c in normalised_name if not unicodedata.combining(c)]) + + # Run filters against normalised, cleaned normalised and the original name, + # in case there are filters for one but not another. + names_to_check = (name, normalised_name, cleaned_normalised_name) + + new_ctx = ctx.replace(content=" ".join(names_to_check)) + result_actions, list_messages, triggers = await self._resolve_action(new_ctx) + if result_actions: + await result_actions.action(ctx) + if ctx.send_alert: + await self._send_alert(ctx, list_messages) # `ctx` has the original content. + # Update time when alert sent + await self.name_alerts.set(ctx.author.id, arrow.utcnow().timestamp()) + self._increment_stats(triggers) + + async def _resolve_list_type_and_name( + self, ctx: Context, list_type: ListType | None = None, list_name: str | None = None, *, exclude: str = "" + ) -> tuple[ListType, FilterList] | None: + """Prompt the user to complete the list type or list name if one of them is missing.""" + if list_name is None: + args = [list_type] if exclude != "list_type" else [] + await ctx.send( + "The **list_name** argument is unspecified. Please pick a value from the options below:", + view=ArgumentCompletionView(ctx, args, "list_name", list(self.filter_lists), 1, None) + ) + return None + + filter_list = self._get_list_by_name(list_name) + if list_type is None: + if len(filter_list) > 1: + args = [list_name] if exclude != "list_name" else [] + await ctx.send( + "The **list_type** argument is unspecified. Please pick a value from the options below:", + view=ArgumentCompletionView( + ctx, args, "list_type", [option.name for option in ListType], 0, list_type_converter + ) + ) + return None + list_type = list(filter_list)[0] + return list_type, filter_list + + def _get_list_by_name(self, list_name: str) -> FilterList: + """Get a filter list by its name, or raise an error if there's no such list.""" + log.trace(f"Getting the filter list matching the name {list_name}") + filter_list = self.filter_lists.get(list_name) + if not filter_list: + if list_name.endswith("s"): # The user may have attempted to use the plural form. + filter_list = self.filter_lists.get(list_name[:-1]) + if not filter_list: + raise BadArgument(f"There's no filter list named {list_name!r}.") + log.trace(f"Found list named {filter_list.name}") + return filter_list + + @staticmethod + async def _send_list(ctx: Context, filter_list: FilterList, list_type: ListType) -> None: + """Show the list of filters identified by the list name and type.""" + if list_type not in filter_list: + await ctx.send(f":x: There is no list of {past_tense(list_type.name.lower())} {filter_list.name}s.") + return + + lines = list(map(str, filter_list[list_type].filters.values())) + log.trace(f"Sending a list of {len(lines)} filters.") + + embed = Embed(colour=Colour.blue()) + embed.set_author(name=f"List of {filter_list[list_type].label}s ({len(lines)} total)") + + await LinePaginator.paginate(lines, ctx, embed, max_lines=15, empty=False, reply=True) + + def _get_filter_by_id(self, id_: int) -> Optional[tuple[Filter, FilterList, ListType]]: + """Get the filter object corresponding to the provided ID, along with its containing list and list type.""" + for filter_list in self.filter_lists.values(): + for list_type, sublist in filter_list.items(): + if id_ in sublist.filters: + return sublist.filters[id_], filter_list, list_type + + async def _add_filter( + self, + ctx: Context, + noui: Optional[Literal["noui"]], + list_type: ListType, + filter_list: FilterList, + content: str, + description_and_settings: Optional[str] = None + ) -> None: + """Add a filter to the database.""" + # Validations. + if list_type not in filter_list: + await ctx.reply(f":x: There is no list of {past_tense(list_type.name.lower())} {filter_list.name}s.") + return + filter_type = filter_list.get_filter_type(content) + if not filter_type: + await ctx.reply(f":x: Could not find a filter type appropriate for `{content}`.") + return + # Parse the description and settings. + description, settings, filter_settings = description_and_settings_converter( + filter_list, + list_type, + filter_type, + self.loaded_settings, + self.loaded_filter_settings, + description_and_settings + ) + + if noui: # Add directly with no UI. + try: + await self._post_new_filter( + ctx.message, filter_list, list_type, filter_type, content, description, settings, filter_settings + ) + except ResponseCodeError as e: + await ctx.reply(embed=format_response_error(e)) + except ValueError as e: + raise BadArgument(str(e)) + return + # Bring up the UI. + embed = Embed(colour=Colour.blue()) + embed.description = f"`{content}`" if content else "*No content*" + if description: + embed.description += f" - {description}" + embed.set_author( + name=f"New Filter - {filter_list[list_type].label}".title()) + embed.set_footer(text=( + "Field names with an asterisk have values which override the defaults of the containing filter list. " + f"To view all defaults of the list, " + f"run `{constants.Bot.prefix}filterlist describe {list_type.name} {filter_list.name}`." + )) + + view = filters_ui.FilterEditView( + filter_list, + list_type, + filter_type, + content, + description, + settings, + filter_settings, + self.loaded_settings, + self.loaded_filter_settings, + ctx.author, + embed, + self._post_new_filter + ) + await ctx.send(embed=embed, reference=ctx.message, view=view) + + @staticmethod + def _identical_filters_message(content: str, filter_list: FilterList, list_type: ListType, filter_: Filter) -> str: + """Returns all the filters in the list with content identical to the content supplied.""" + if list_type not in filter_list: + return "" + duplicates = [ + f for f in filter_list[list_type].filters.values() + if f.content == content and f.id != filter_.id + ] + msg = "" + if duplicates: + msg = f"\n:warning: The filter(s) #{', #'.join(str(dup.id) for dup in duplicates)} have the same content. " + msg += "Please make sure this is intentional." + + return msg + + @staticmethod + async def _maybe_alert_auto_infraction( + filter_list: FilterList, list_type: ListType, filter_: Filter, old_filter: Filter | None = None + ) -> None: + """If the filter is new and applies an auto-infraction, or was edited to apply a different one, log it.""" + infraction_type = filter_.overrides[0].get("infraction_type") + if not infraction_type: + infraction_type = filter_list[list_type].default("infraction_type") + if old_filter: + old_infraction_type = old_filter.overrides[0].get("infraction_type") + if not old_infraction_type: + old_infraction_type = filter_list[list_type].default("infraction_type") + if infraction_type == old_infraction_type: + return + + if infraction_type != Infraction.NONE: + filter_log = bot.instance.get_channel(Channels.filter_log) + if filter_log: + await filter_log.send( + f":warning: Heads up! The new {filter_list[list_type].label} filter " + f"({filter_}) will automatically {infraction_type.name.lower()} users." + ) + + async def _post_new_filter( + self, + msg: Message, + filter_list: FilterList, + list_type: ListType, + filter_type: type[Filter], + content: str, + description: str | None, + settings: dict, + filter_settings: dict + ) -> None: + """POST the data of the new filter to the site API.""" + valid, error_msg = filter_type.validate_filter_settings(filter_settings) + if not valid: + raise BadArgument(f"Error while validating filter-specific settings: {error_msg}") + + content, description = await filter_type.process_input(content, description) + + list_id = filter_list[list_type].id + description = description or None + payload = { + "filter_list": list_id, "content": content, "description": description, + "additional_field": json.dumps(filter_settings), **settings + } + response = await bot.instance.api_client.post('bot/filter/filters', json=to_serializable(payload)) + new_filter = filter_list.add_filter(list_type, response) + log.info(f"Added new filter: {new_filter}.") + if new_filter: + await self._maybe_alert_auto_infraction(filter_list, list_type, new_filter) + extra_msg = Filtering._identical_filters_message(content, filter_list, list_type, new_filter) + await msg.reply(f"✅ Added filter: {new_filter}" + extra_msg) + else: + await msg.reply(":x: Could not create the filter. Are you sure it's implemented?") + + async def _patch_filter( + self, + filter_: Filter, + msg: Message, + filter_list: FilterList, + list_type: ListType, + filter_type: type[Filter], + content: str, + description: str | None, + settings: dict, + filter_settings: dict + ) -> None: + """PATCH the new data of the filter to the site API.""" + valid, error_msg = filter_type.validate_filter_settings(filter_settings) + if not valid: + raise BadArgument(f"Error while validating filter-specific settings: {error_msg}") + + if content != filter_.content: + content, description = await filter_type.process_input(content, description) + + # If the setting is not in `settings`, the override was either removed, or there wasn't one in the first place. + for current_settings in (filter_.actions, filter_.validations): + if current_settings: + for setting_entry in current_settings.values(): + settings.update({setting: None for setting in setting_entry.dict() if setting not in settings}) + + # Even though the list ID remains unchanged, it still needs to be provided for correct serializer validation. + list_id = filter_list[list_type].id + description = description or None + payload = { + "filter_list": list_id, "content": content, "description": description, + "additional_field": json.dumps(filter_settings), **settings + } + response = await bot.instance.api_client.patch( + f'bot/filter/filters/{filter_.id}', json=to_serializable(payload) + ) + # Return type can be None, but if it's being edited then it's not supposed to be. + edited_filter = filter_list.add_filter(list_type, response) + log.info(f"Successfully patched filter {edited_filter}.") + await self._maybe_alert_auto_infraction(filter_list, list_type, edited_filter, filter_) + extra_msg = Filtering._identical_filters_message(content, filter_list, list_type, edited_filter) + await msg.reply(f"✅ Edited filter: {edited_filter}" + extra_msg) + + async def _post_filter_list(self, msg: Message, list_name: str, list_type: ListType, settings: dict) -> None: + """POST the new data of the filter list to the site API.""" + payload = {"name": list_name, "list_type": list_type.value, **to_serializable(settings)} + filterlist_name = f"{past_tense(list_type.name.lower())} {list_name}" + response = await bot.instance.api_client.post('bot/filter/filter_lists', json=payload) + log.info(f"Successfully posted the new {filterlist_name} filterlist.") + self._load_raw_filter_list(response) + await msg.reply(f"✅ Added a new filter list: {filterlist_name}") + + @staticmethod + async def _patch_filter_list(msg: Message, filter_list: FilterList, list_type: ListType, settings: dict) -> None: + """PATCH the new data of the filter list to the site API.""" + list_id = filter_list[list_type].id + response = await bot.instance.api_client.patch( + f'bot/filter/filter_lists/{list_id}', json=to_serializable(settings) + ) + log.info(f"Successfully patched the {filter_list[list_type].label} filterlist, reloading...") + filter_list.pop(list_type, None) + filter_list.add_list(response) + await msg.reply(f"✅ Edited filter list: {filter_list[list_type].label}") + + def _filter_match_query( + self, filter_: Filter, settings_query: dict, filter_settings_query: dict, differ_by_default: set[str] + ) -> bool: + """Return whether the given filter matches the query.""" + override_matches = set() + overrides, _ = filter_.overrides + for setting_name, setting_value in settings_query.items(): + if setting_name not in overrides: + continue + if repr_equals(overrides[setting_name], setting_value): + override_matches.add(setting_name) + else: # If an override doesn't match then the filter doesn't match. + return False + if not (differ_by_default <= override_matches): # The overrides didn't cover for the default mismatches. + return False + + filter_settings = filter_.extra_fields.dict() if filter_.extra_fields else {} + # If the dict changes then some fields were not the same. + return (filter_settings | filter_settings_query) == filter_settings + + def _search_filter_list( + self, atomic_list: AtomicList, filter_type: type[Filter] | None, settings: dict, filter_settings: dict + ) -> list[Filter]: + """Find all filters in the filter list which match the settings.""" + # If the default answers are known, only the overrides need to be checked for each filter. + all_defaults = atomic_list.defaults.dict() + match_by_default = set() + differ_by_default = set() + for setting_name, setting_value in settings.items(): + if repr_equals(all_defaults[setting_name], setting_value): + match_by_default.add(setting_name) + else: + differ_by_default.add(setting_name) + + result_filters = [] + for filter_ in atomic_list.filters.values(): + if filter_type and not isinstance(filter_, filter_type): + continue + if self._filter_match_query(filter_, settings, filter_settings, differ_by_default): + result_filters.append(filter_) + + return result_filters + + async def _search_filters( + self, message: Message, filter_type: type[Filter] | None, settings: dict, filter_settings: dict + ) -> None: + """Find all filters which match the settings and display them.""" + lines = [] + result_count = 0 + for filter_list in self.filter_lists.values(): + if filter_type and filter_type not in filter_list.filter_types: + continue + for atomic_list in filter_list.values(): + list_results = self._search_filter_list(atomic_list, filter_type, settings, filter_settings) + if list_results: + lines.append(f"**{atomic_list.label.title()}**") + lines.extend(map(str, list_results)) + lines.append("") + result_count += len(list_results) + + embed = Embed(colour=Colour.blue()) + embed.set_author(name=f"Search Results ({result_count} total)") + ctx = await bot.instance.get_context(message) + await LinePaginator.paginate(lines, ctx, embed, max_lines=15, empty=False, reply=True) + + async def _delete_offensive_msg(self, msg: Mapping[str, int]) -> None: + """Delete an offensive message, and then delete it from the DB.""" + try: + channel = self.bot.get_channel(msg['channel_id']) + if channel: + msg_obj = await channel.fetch_message(msg['id']) + await msg_obj.delete() + except discord.NotFound: + log.info( + f"Tried to delete message {msg['id']}, but the message can't be found " + f"(it has been probably already deleted)." + ) + except HTTPException as e: + log.warning(f"Failed to delete message {msg['id']}: status {e.status}") + + await self.bot.api_client.delete(f'bot/offensive-messages/{msg["id"]}') + log.info(f"Deleted the offensive message with id {msg['id']}.") + + def _schedule_msg_delete(self, msg: dict) -> None: + """Delete an offensive message once its deletion date is reached.""" + delete_at = arrow.get(msg['delete_date']).datetime + self.delete_scheduler.schedule_at(delete_at, msg['id'], self._delete_offensive_msg(msg)) + + async def _maybe_schedule_msg_delete(self, ctx: FilterContext, actions: ActionSettings | None) -> None: + """Post the message to the database and schedule it for deletion if it's not set to be deleted already.""" + msg = ctx.message + if not msg or not actions or actions.get_setting("remove_context", True): + return + + delete_date = (msg.created_at + OFFENSIVE_MSG_DELETE_TIME).isoformat() + data = { + 'id': msg.id, + 'channel_id': msg.channel.id, + 'delete_date': delete_date + } + + try: + await self.bot.api_client.post('bot/offensive-messages', json=data) + except ResponseCodeError as e: + if e.status == 400 and "already exists" in e.response_json.get("id", [""])[0]: + log.debug(f"Offensive message {msg.id} already exists.") + else: + log.error(f"Offensive message {msg.id} failed to post: {e}") + else: + self._schedule_msg_delete(data) + log.trace(f"Offensive message {msg.id} will be deleted on {delete_date}") + + # endregion + # region: tasks + + @tasks.loop(time=datetime.time(hour=18)) + async def weekly_auto_infraction_report_task(self) -> None: + """Trigger an auto-infraction report to be sent if it is the desired day of the week (WEEKLY_REPORT_ISO_DAY).""" + if arrow.utcnow().isoweekday() != WEEKLY_REPORT_ISO_DAY: + return + + await self.send_weekly_auto_infraction_report() + + async def send_weekly_auto_infraction_report(self, channel: discord.TextChannel | discord.Thread = None) -> None: + """ + Send a list of auto-infractions added in the last 7 days to the specified channel. + + If `channel` is not specified, it is sent to #mod-meta. + """ + log.trace("Preparing weekly auto-infraction report.") + seven_days_ago = arrow.utcnow().shift(days=-7) + if not channel: + log.info("Auto-infraction report: the channel to report to is missing.") + channel = self.bot.get_channel(Channels.mod_meta) + elif not is_mod_channel(channel): + # Silently fail if output is going to be a non-mod channel. + log.info(f"Auto-infraction report: the channel {channel} is not a mod channel.") + return + + found_filters = defaultdict(list) + # Extract all auto-infraction filters added in the past 7 days from each filter type + for filter_list in self.filter_lists.values(): + for sublist in filter_list.values(): + default_infraction_type = sublist.default("infraction_type") + for filter_ in sublist.filters.values(): + if max(filter_.created_at, filter_.updated_at) < seven_days_ago: + continue + infraction_type = filter_.overrides[0].get("infraction_type") + if ( + (infraction_type and infraction_type != Infraction.NONE) + or (not infraction_type and default_infraction_type != Infraction.NONE) + ): + found_filters[sublist.label].append((filter_, infraction_type or default_infraction_type)) + + # Nicely format the output so each filter list type is grouped + lines = [f"**Auto-infraction filters added since {seven_days_ago.format('YYYY-MM-DD')}**"] + for list_label, filters in found_filters.items(): + lines.append("\n".join([f"**{list_label.title()}**"]+[f"{filter_} ({infr})" for filter_, infr in filters])) + + if len(lines) == 1: + lines.append("Nothing to show") + + await channel.send("\n\n".join(lines)) + log.info("Successfully sent auto-infraction report.") + + # endregion + + async def cog_unload(self) -> None: + """Cancel the weekly auto-infraction filter report and deletion scheduling on cog unload.""" + self.weekly_auto_infraction_report_task.cancel() + self.delete_scheduler.cancel_all() + + +async def setup(bot: Bot) -> None: + """Load the Filtering cog.""" + await bot.add_cog(Filtering(bot)) diff --git a/bot/exts/filters/antimalware.py b/bot/exts/filters/antimalware.py deleted file mode 100644 index ff39700a6..000000000 --- a/bot/exts/filters/antimalware.py +++ /dev/null @@ -1,106 +0,0 @@ -import typing as t -from os.path import splitext - -from discord import Embed, Message, NotFound -from discord.ext.commands import Cog - -from bot.bot import Bot -from bot.constants import Channels, Filter, URLs -from bot.exts.events.code_jams._channels import CATEGORY_NAME as JAM_CATEGORY_NAME -from bot.log import get_logger - -log = get_logger(__name__) - -PY_EMBED_DESCRIPTION = ( - "It looks like you tried to attach a Python file - " - f"please use a code-pasting service such as {URLs.site_schema}{URLs.site_paste}" -) - -TXT_LIKE_FILES = {".txt", ".csv", ".json"} -TXT_EMBED_DESCRIPTION = ( - "You either uploaded a `{blocked_extension}` file or entered a message that was too long. " - f"Please use our [paste bin]({URLs.site_schema}{URLs.site_paste}) instead." -) - -DISALLOWED_EMBED_DESCRIPTION = ( - "It looks like you tried to attach file type(s) that we do not allow ({blocked_extensions_str}). " - "We currently allow the following file types: **{joined_whitelist}**.\n\n" - "Feel free to ask in {meta_channel_mention} if you think this is a mistake." -) - - -class AntiMalware(Cog): - """Delete messages which contain attachments with non-whitelisted file extensions.""" - - def __init__(self, bot: Bot): - self.bot = bot - - def _get_whitelisted_file_formats(self) -> list: - """Get the file formats currently on the whitelist.""" - return self.bot.filter_list_cache['FILE_FORMAT.True'].keys() - - def _get_disallowed_extensions(self, message: Message) -> t.Iterable[str]: - """Get an iterable containing all the disallowed extensions of attachments.""" - file_extensions = {splitext(attachment.filename.lower())[1] for attachment in message.attachments} - extensions_blocked = file_extensions - set(self._get_whitelisted_file_formats()) - return extensions_blocked - - @Cog.listener() - async def on_message(self, message: Message) -> None: - """Identify messages with prohibited attachments.""" - # Return when message don't have attachment and don't moderate DMs - if not message.attachments or not message.guild: - return - - # Ignore webhook and bot messages - if message.webhook_id or message.author.bot: - return - - # Ignore code jam channels - if getattr(message.channel, "category", None) and message.channel.category.name == JAM_CATEGORY_NAME: - return - - # Check if user is staff, if is, return - # Since we only care that roles exist to iterate over, check for the attr rather than a User/Member instance - if hasattr(message.author, "roles") and any(role.id in Filter.role_whitelist for role in message.author.roles): - return - - embed = Embed() - extensions_blocked = self._get_disallowed_extensions(message) - blocked_extensions_str = ', '.join(extensions_blocked) - if ".py" in extensions_blocked: - # Short-circuit on *.py files to provide a pastebin link - embed.description = PY_EMBED_DESCRIPTION - elif extensions := TXT_LIKE_FILES.intersection(extensions_blocked): - # Work around Discord AutoConversion of messages longer than 2000 chars to .txt - cmd_channel = self.bot.get_channel(Channels.bot_commands) - embed.description = TXT_EMBED_DESCRIPTION.format( - blocked_extension=extensions.pop(), - cmd_channel_mention=cmd_channel.mention - ) - elif extensions_blocked: - meta_channel = self.bot.get_channel(Channels.meta) - embed.description = DISALLOWED_EMBED_DESCRIPTION.format( - joined_whitelist=', '.join(self._get_whitelisted_file_formats()), - blocked_extensions_str=blocked_extensions_str, - meta_channel_mention=meta_channel.mention, - ) - - if embed.description: - log.info( - f"User '{message.author}' ({message.author.id}) uploaded blacklisted file(s): {blocked_extensions_str}", - extra={"attachment_list": [attachment.filename for attachment in message.attachments]} - ) - - await message.channel.send(f"Hey {message.author.mention}!", embed=embed) - - # Delete the offending message: - try: - await message.delete() - except NotFound: - log.info(f"Tried to delete message `{message.id}`, but message could not be found.") - - -async def setup(bot: Bot) -> None: - """Load the AntiMalware cog.""" - await bot.add_cog(AntiMalware(bot)) diff --git a/bot/exts/filters/antispam.py b/bot/exts/filters/antispam.py deleted file mode 100644 index 0d02edabf..000000000 --- a/bot/exts/filters/antispam.py +++ /dev/null @@ -1,326 +0,0 @@ -import asyncio -from collections import defaultdict -from collections.abc import Mapping -from dataclasses import dataclass, field -from datetime import timedelta -from itertools import takewhile -from operator import attrgetter, itemgetter -from typing import Dict, Iterable, List, Set - -import arrow -from discord import Colour, Member, Message, MessageType, NotFound, TextChannel -from discord.ext.commands import Cog -from pydis_core.utils import scheduling - -from bot import rules -from bot.bot import Bot -from bot.constants import ( - AntiSpam as AntiSpamConfig, Channels, Colours, DEBUG_MODE, Event, Filter, Guild as GuildConfig, Icons -) -from bot.converters import Duration -from bot.exts.events.code_jams._channels import CATEGORY_NAME as JAM_CATEGORY_NAME -from bot.exts.moderation.modlog import ModLog -from bot.log import get_logger -from bot.utils import lock -from bot.utils.message_cache import MessageCache -from bot.utils.messages import format_user, send_attachments - -log = get_logger(__name__) - -RULE_FUNCTION_MAPPING = { - 'attachments': rules.apply_attachments, - 'burst': rules.apply_burst, - # burst shared is temporarily disabled due to a bug - # 'burst_shared': rules.apply_burst_shared, - 'chars': rules.apply_chars, - 'discord_emojis': rules.apply_discord_emojis, - 'duplicates': rules.apply_duplicates, - 'links': rules.apply_links, - 'mentions': rules.apply_mentions, - 'newlines': rules.apply_newlines, - 'role_mentions': rules.apply_role_mentions, -} - -ANTI_SPAM_RULES = AntiSpamConfig.rules.dict() - - -@dataclass -class DeletionContext: - """Represents a Deletion Context for a single spam event.""" - - members: frozenset[Member] - triggered_in: TextChannel - channels: set[TextChannel] = field(default_factory=set) - rules: Set[str] = field(default_factory=set) - messages: Dict[int, Message] = field(default_factory=dict) - attachments: List[List[str]] = field(default_factory=list) - - async def add(self, rule_name: str, channels: Iterable[TextChannel], messages: Iterable[Message]) -> None: - """Adds new rule violation events to the deletion context.""" - self.rules.add(rule_name) - - self.channels.update(channels) - - for message in messages: - if message.id not in self.messages: - self.messages[message.id] = message - - # Re-upload attachments - destination = message.guild.get_channel(Channels.attachment_log) - urls = await send_attachments(message, destination, link_large=False) - self.attachments.append(urls) - - async def upload_messages(self, actor_id: int, modlog: ModLog) -> None: - """Method that takes care of uploading the queue and posting modlog alert.""" - triggered_by_users = ", ".join(format_user(m) for m in self.members) - triggered_in_channel = f"**Triggered in:** {self.triggered_in.mention}\n" if len(self.channels) > 1 else "" - channels_description = ", ".join(channel.mention for channel in self.channels) - - mod_alert_message = ( - f"**Triggered by:** {triggered_by_users}\n" - f"{triggered_in_channel}" - f"**Channels:** {channels_description}\n" - f"**Rules:** {', '.join(rule for rule in self.rules)}\n" - ) - - messages_as_list = list(self.messages.values()) - first_message = messages_as_list[0] - # For multiple messages and those with attachments or excessive newlines, use the logs API - if any(( - len(messages_as_list) > 1, - len(first_message.attachments) > 0, - first_message.content.count('\n') > 15 - )): - url = await modlog.upload_log(self.messages.values(), actor_id, self.attachments) - mod_alert_message += f"A complete log of the offending messages can be found [here]({url})" - else: - mod_alert_message += "Message:\n" - content = first_message.clean_content - remaining_chars = 4080 - len(mod_alert_message) - - if len(content) > remaining_chars: - url = await modlog.upload_log([first_message], actor_id, self.attachments) - log_site_msg = f"The full message can be found [here]({url})" - content = content[:remaining_chars - (3 + len(log_site_msg))] + "..." - - mod_alert_message += content - - await modlog.send_log_message( - content=", ".join(str(m.id) for m in self.members), # quality-of-life improvement for mobile moderators - icon_url=Icons.filtering, - colour=Colour(Colours.soft_red), - title="Spam detected!", - text=mod_alert_message, - thumbnail=first_message.author.display_avatar.url, - channel_id=Channels.mod_alerts, - ping_everyone=AntiSpamConfig.ping_everyone - ) - - -class AntiSpam(Cog): - """Cog that controls our anti-spam measures.""" - - def __init__(self, bot: Bot, validation_errors: Dict[str, str]) -> None: - self.bot = bot - self.validation_errors = validation_errors - self.expiration_date_converter = Duration() - - self.message_deletion_queue = dict() - - # Fetch the rule configuration with the highest rule interval. - max_interval_config = max( - ANTI_SPAM_RULES.values(), - key=itemgetter('interval') - ) - self.max_interval = max_interval_config['interval'] - self.cache = MessageCache(AntiSpamConfig.cache_size, newest_first=True) - - @property - def mod_log(self) -> ModLog: - """Allows for easy access of the ModLog cog.""" - return self.bot.get_cog("ModLog") - - async def cog_load(self) -> None: - """Unloads the cog and alerts admins if configuration validation failed.""" - await self.bot.wait_until_guild_available() - if self.validation_errors: - body = "**The following errors were encountered:**\n" - body += "\n".join(f"- {error}" for error in self.validation_errors.values()) - body += "\n\n**The cog has been unloaded.**" - - await self.mod_log.send_log_message( - title="Error: AntiSpam configuration validation failed!", - text=body, - ping_everyone=True, - icon_url=Icons.token_removed, - colour=Colour.red() - ) - - await self.bot.remove_cog(self.__class__.__name__) - return - - @Cog.listener() - async def on_message(self, message: Message) -> None: - """Applies the antispam rules to each received message.""" - if ( - not message.guild - or message.guild.id != GuildConfig.id - or message.author.bot - or (getattr(message.channel, "category", None) and message.channel.category.name == JAM_CATEGORY_NAME) - or (message.channel.id in Filter.channel_whitelist and not DEBUG_MODE) - or (any(role.id in Filter.role_whitelist for role in message.author.roles) and not DEBUG_MODE) - or message.type == MessageType.auto_moderation_action - ): - return - - self.cache.append(message) - - earliest_relevant_at = arrow.utcnow() - timedelta(seconds=self.max_interval) - relevant_messages = list(takewhile(lambda msg: msg.created_at > earliest_relevant_at, self.cache)) - - for rule_name, rule_config in ANTI_SPAM_RULES.items(): - rule_function = RULE_FUNCTION_MAPPING[rule_name] - - # Create a list of messages that were sent in the interval that the rule cares about. - latest_interesting_stamp = arrow.utcnow() - timedelta(seconds=rule_config['interval']) - messages_for_rule = list( - takewhile(lambda msg: msg.created_at > latest_interesting_stamp, relevant_messages) # noqa: B023 - ) - - result = await rule_function(message, messages_for_rule, rule_config) - - # If the rule returns `None`, that means the message didn't violate it. - # If it doesn't, it returns a tuple in the form `(str, Iterable[discord.Member])` - # which contains the reason for why the message violated the rule and - # an iterable of all members that violated the rule. - if result is not None: - self.bot.stats.incr(f"mod_alerts.{rule_name}") - reason, members, relevant_messages = result - full_reason = f"`{rule_name}` rule: {reason}" - - # If there's no spam event going on for this channel, start a new Message Deletion Context - authors_set = frozenset(members) - if authors_set not in self.message_deletion_queue: - log.trace(f"Creating queue for members `{authors_set}`") - self.message_deletion_queue[authors_set] = DeletionContext(authors_set, message.channel) - scheduling.create_task( - self._process_deletion_context(authors_set), - name=f"AntiSpam._process_deletion_context({authors_set})" - ) - - # Add the relevant of this trigger to the Deletion Context - await self.message_deletion_queue[authors_set].add( - rule_name=rule_name, - channels=set(message.channel for message in relevant_messages), - messages=relevant_messages - ) - - for member in members: - scheduling.create_task( - self.punish(message, member, full_reason), - name=f"AntiSpam.punish(message={message.id}, member={member.id}, rule={rule_name})" - ) - - await self.maybe_delete_messages(relevant_messages) - break - - @lock.lock_arg("antispam.punish", "member", attrgetter("id")) - async def punish(self, msg: Message, member: Member, reason: str) -> None: - """Punishes the given member for triggering an antispam rule.""" - if not member.is_timed_out(): - remove_timeout_after = AntiSpamConfig.remove_timeout_after - - # Get context and make sure the bot becomes the actor of infraction by patching the `author` attributes - context = await self.bot.get_context(msg) - command = self.bot.get_command("timeout") - context.author = context.guild.get_member(self.bot.user.id) - context.command = command - - # Since we're going to invoke the timeout command directly, we need to manually call the converter. - dt_remove_role_after = await self.expiration_date_converter.convert(context, f"{remove_timeout_after}S") - await context.invoke( - command, - member, - dt_remove_role_after, - reason=reason - ) - - async def maybe_delete_messages(self, messages: List[Message]) -> None: - """Cleans the messages if cleaning is configured.""" - if AntiSpamConfig.clean_offending: - # If we have more than one message, we can use bulk delete. - if len(messages) > 1: - message_ids = [message.id for message in messages] - self.mod_log.ignore(Event.message_delete, *message_ids) - channel_messages = defaultdict(list) - for message in messages: - channel_messages[message.channel].append(message) - for channel, messages in channel_messages.items(): - try: - await channel.delete_messages(messages) - except NotFound: - # In the rare case where we found messages matching the - # spam filter across multiple channels, it is possible - # that a single channel will only contain a single message - # to delete. If that should be the case, discord.py will - # use the "delete single message" endpoint instead of the - # bulk delete endpoint, and the single message deletion - # endpoint will complain if you give it that does not exist. - # As this means that we have no other message to delete in - # this channel (and message deletes work per-channel), - # we can just log an exception and carry on with business. - log.info(f"Tried to delete message `{messages[0].id}`, but message could not be found.") - - # Otherwise, the bulk delete endpoint will throw up. - # Delete the message directly instead. - else: - self.mod_log.ignore(Event.message_delete, messages[0].id) - try: - await messages[0].delete() - except NotFound: - log.info(f"Tried to delete message `{messages[0].id}`, but message could not be found.") - - async def _process_deletion_context(self, context_id: frozenset) -> None: - """Processes the Deletion Context queue.""" - log.trace("Sleeping before processing message deletion queue.") - await asyncio.sleep(10) - - if context_id not in self.message_deletion_queue: - log.error(f"Started processing deletion queue for context `{context_id}`, but it was not found!") - return - - deletion_context = self.message_deletion_queue.pop(context_id) - await deletion_context.upload_messages(self.bot.user.id, self.mod_log) - - @Cog.listener() - async def on_message_edit(self, before: Message, after: Message) -> None: - """Updates the message in the cache, if it's cached.""" - self.cache.update(after) - - -def validate_config(rules_: Mapping = ANTI_SPAM_RULES) -> Dict[str, str]: - """Validates the antispam configs.""" - validation_errors = {} - for name, config in rules_.items(): - config = config - if name not in RULE_FUNCTION_MAPPING: - log.error( - f"Unrecognized antispam rule `{name}`. " - f"Valid rules are: {', '.join(RULE_FUNCTION_MAPPING)}" - ) - validation_errors[name] = f"`{name}` is not recognized as an antispam rule." - continue - for required_key in ('interval', 'max'): - if required_key not in config: - log.error( - f"`{required_key}` is required but was not " - f"set in rule `{name}`'s configuration." - ) - validation_errors[name] = f"Key `{required_key}` is required but not set for rule `{name}`" - return validation_errors - - -async def setup(bot: Bot) -> None: - """Validate the AntiSpam configs and load the AntiSpam cog.""" - validation_errors = validate_config() - await bot.add_cog(AntiSpam(bot, validation_errors)) diff --git a/bot/exts/filters/filter_lists.py b/bot/exts/filters/filter_lists.py deleted file mode 100644 index 538744204..000000000 --- a/bot/exts/filters/filter_lists.py +++ /dev/null @@ -1,359 +0,0 @@ -import datetime -import re -from collections import defaultdict -from typing import Optional - -import arrow -import discord -from discord.ext import tasks -from discord.ext.commands import BadArgument, Cog, Context, IDConverter, command, group, has_any_role -from pydis_core.site_api import ResponseCodeError - -from bot import constants -from bot.bot import Bot -from bot.constants import Channels, Colours -from bot.converters import ValidDiscordServerInvite, ValidFilterListType -from bot.log import get_logger -from bot.pagination import LinePaginator -from bot.utils.channel import is_mod_channel - -log = get_logger(__name__) -WEEKLY_REPORT_ISO_DAY = 3 # 1=Monday, 7=Sunday - - -class FilterLists(Cog): - """Commands for blacklisting and whitelisting things.""" - - methods_with_filterlist_types = [ - "allow_add", - "allow_delete", - "allow_get", - "deny_add", - "deny_delete", - "deny_get", - ] - - def __init__(self, bot: Bot) -> None: - self.bot = bot - - async def cog_load(self) -> None: - """Add the valid FilterList types to the docstrings, so they'll appear in !help invocations.""" - await self.bot.wait_until_guild_available() - self.weekly_autoban_report_task.start() - - # Add valid filterlist types to the docstrings - valid_types = await ValidFilterListType.get_valid_types(self.bot) - valid_types = [f"`{type_.lower()}`" for type_ in valid_types] - - for method_name in self.methods_with_filterlist_types: - command = getattr(self, method_name) - command.help = ( - f"{command.help}\n\nValid **list_type** values are {', '.join(valid_types)}." - ) - - async def _add_data( - self, - ctx: Context, - allowed: bool, - list_type: ValidFilterListType, - content: str, - comment: Optional[str] = None, - ) -> None: - """Add an item to a filterlist.""" - allow_type = "whitelist" if allowed else "blacklist" - - # If this is a guild invite, we gotta validate it. - if list_type == "GUILD_INVITE": - guild_data = await self._validate_guild_invite(ctx, content) - content = guild_data.get("id") - - # Some guild invites are autoban filters, which require the mod - # to set a comment which includes [autoban]. - # Having the guild name in the comment is still useful when reviewing - # filter list, so prepend it to the set comment in case some mod forgets. - guild_name_part = f'Guild "{guild_data["name"]}"' if "name" in guild_data else None - - comment = " - ".join( - comment_part - for comment_part in (guild_name_part, comment) - if comment_part - ) - - # If it's a file format, let's make sure it has a leading dot. - elif list_type == "FILE_FORMAT" and not content.startswith("."): - content = f".{content}" - - # If it's a filter token, validate the passed regex - elif list_type == "FILTER_TOKEN": - try: - re.compile(content) - except re.error as e: - await ctx.message.add_reaction("❌") - await ctx.send( - f"{ctx.author.mention} that's not a valid regex! " - f"Regex error message: {e.msg}." - ) - return - - # Try to add the item to the database - log.trace(f"Trying to add the {content} item to the {list_type} {allow_type}") - payload = { - "allowed": allowed, - "type": list_type, - "content": content, - "comment": comment, - } - - try: - item = await self.bot.api_client.post( - "bot/filter-lists", - json=payload - ) - except ResponseCodeError as e: - if e.status == 400: - await ctx.message.add_reaction("❌") - log.debug( - f"{ctx.author} tried to add data to a {allow_type}, but the API returned 400, " - "probably because the request violated the UniqueConstraint." - ) - raise BadArgument( - f"Unable to add the item to the {allow_type}. " - "The item probably already exists. Keep in mind that a " - "blacklist and a whitelist for the same item cannot co-exist, " - "and we do not permit any duplicates." - ) - raise - - # If it is an autoban trigger we send a warning in #filter-log - if comment and "[autoban]" in comment: - await self.bot.get_channel(Channels.filter_log).send( - f":warning: Heads-up! The new `{list_type}` filter " - f"`{content}` (`{comment}`) will automatically ban users." - ) - - # Insert the item into the cache - self.bot.insert_item_into_filter_list_cache(item) - await ctx.message.add_reaction("✅") - - async def _delete_data(self, ctx: Context, allowed: bool, list_type: ValidFilterListType, content: str) -> None: - """Remove an item from a filterlist.""" - allow_type = "whitelist" if allowed else "blacklist" - - # If this is a server invite, we need to convert it. - if list_type == "GUILD_INVITE" and not IDConverter()._get_id_match(content): - guild_data = await self._validate_guild_invite(ctx, content) - content = guild_data.get("id") - - # If it's a file format, let's make sure it has a leading dot. - elif list_type == "FILE_FORMAT" and not content.startswith("."): - content = f".{content}" - - # Find the content and delete it. - log.trace(f"Trying to delete the {content} item from the {list_type} {allow_type}") - item = self.bot.filter_list_cache[f"{list_type}.{allowed}"].get(content) - - if item is not None: - try: - await self.bot.api_client.delete( - f"bot/filter-lists/{item['id']}" - ) - del self.bot.filter_list_cache[f"{list_type}.{allowed}"][content] - await ctx.message.add_reaction("✅") - except ResponseCodeError as e: - log.debug( - f"{ctx.author} tried to delete an item with the id {item['id']}, but " - f"the API raised an unexpected error: {e}" - ) - await ctx.message.add_reaction("❌") - else: - await ctx.message.add_reaction("❌") - - async def _list_all_data(self, ctx: Context, allowed: bool, list_type: ValidFilterListType) -> None: - """Paginate and display all items in a filterlist.""" - allow_type = "whitelist" if allowed else "blacklist" - result = self.bot.filter_list_cache[f"{list_type}.{allowed}"] - - # Build a list of lines we want to show in the paginator - lines = [] - for content, metadata in result.items(): - line = f"• `{content}`" - - if comment := metadata.get("comment"): - line += f" - {comment}" - - lines.append(line) - lines = sorted(lines) - - # Build the embed - list_type_plural = list_type.lower().replace("_", " ").title() + "s" - embed = discord.Embed( - title=f"{allow_type.title()}ed {list_type_plural} ({len(result)} total)", - colour=Colours.blue - ) - log.trace(f"Trying to list {len(result)} items from the {list_type.lower()} {allow_type}") - - if result: - await LinePaginator.paginate(lines, ctx, embed, max_lines=15, empty=False) - else: - embed.description = "Hmmm, seems like there's nothing here yet." - await ctx.send(embed=embed) - await ctx.message.add_reaction("❌") - - async def _sync_data(self, ctx: Context) -> None: - """Syncs the filterlists with the API.""" - try: - log.trace("Attempting to sync FilterList cache with data from the API.") - await self.bot.cache_filter_list_data() - await ctx.message.add_reaction("✅") - except ResponseCodeError as e: - log.debug( - f"{ctx.author} tried to sync FilterList cache data but " - f"the API raised an unexpected error: {e}" - ) - await ctx.message.add_reaction("❌") - - @staticmethod - async def _validate_guild_invite(ctx: Context, invite: str) -> dict: - """ - Validates a guild invite, and returns the guild info as a dict. - - Will raise a BadArgument if the guild invite is invalid. - """ - log.trace(f"Attempting to validate whether or not {invite} is a guild invite.") - validator = ValidDiscordServerInvite() - guild_data = await validator.convert(ctx, invite) - - # If we make it this far without raising a BadArgument, the invite is - # valid. Let's return a dict of guild information. - log.trace(f"{invite} validated as server invite. Converting to ID.") - return guild_data - - @group(aliases=("allowlist", "allow", "al", "wl")) - async def whitelist(self, ctx: Context) -> None: - """Group for whitelisting commands.""" - if not ctx.invoked_subcommand: - await ctx.send_help(ctx.command) - - @group(aliases=("denylist", "deny", "bl", "dl")) - async def blacklist(self, ctx: Context) -> None: - """Group for blacklisting commands.""" - if not ctx.invoked_subcommand: - await ctx.send_help(ctx.command) - - @whitelist.command(name="add", aliases=("a", "set")) - async def allow_add( - self, - ctx: Context, - list_type: ValidFilterListType, - content: str, - *, - comment: Optional[str] = None, - ) -> None: - """Add an item to the specified allowlist.""" - await self._add_data(ctx, True, list_type, content, comment) - - @blacklist.command(name="add", aliases=("a", "set")) - async def deny_add( - self, - ctx: Context, - list_type: ValidFilterListType, - content: str, - *, - comment: Optional[str] = None, - ) -> None: - """Add an item to the specified denylist.""" - await self._add_data(ctx, False, list_type, content, comment) - - @whitelist.command(name="remove", aliases=("delete", "rm",)) - async def allow_delete(self, ctx: Context, list_type: ValidFilterListType, content: str) -> None: - """Remove an item from the specified allowlist.""" - await self._delete_data(ctx, True, list_type, content) - - @blacklist.command(name="remove", aliases=("delete", "rm",)) - async def deny_delete(self, ctx: Context, list_type: ValidFilterListType, content: str) -> None: - """Remove an item from the specified denylist.""" - await self._delete_data(ctx, False, list_type, content) - - @whitelist.command(name="get", aliases=("list", "ls", "fetch", "show")) - async def allow_get(self, ctx: Context, list_type: ValidFilterListType) -> None: - """Get the contents of a specified allowlist.""" - await self._list_all_data(ctx, True, list_type) - - @blacklist.command(name="get", aliases=("list", "ls", "fetch", "show")) - async def deny_get(self, ctx: Context, list_type: ValidFilterListType) -> None: - """Get the contents of a specified denylist.""" - await self._list_all_data(ctx, False, list_type) - - @whitelist.command(name="sync", aliases=("s",)) - async def allow_sync(self, ctx: Context) -> None: - """Syncs both allowlists and denylists with the API.""" - await self._sync_data(ctx) - - @blacklist.command(name="sync", aliases=("s",)) - async def deny_sync(self, ctx: Context) -> None: - """Syncs both allowlists and denylists with the API.""" - await self._sync_data(ctx) - - @command(name="filter_report") - async def force_send_weekly_report(self, ctx: Context) -> None: - """Respond with a list of autobans added in the last 7 days.""" - await self.send_weekly_autoban_report(ctx.channel) - - @tasks.loop(time=datetime.time(hour=18)) - async def weekly_autoban_report_task(self) -> None: - """Trigger autoban report to be sent if it is the desired day of the week (WEEKLY_REPORT_ISO_DAY).""" - if arrow.utcnow().isoweekday() != WEEKLY_REPORT_ISO_DAY: - return - - await self.send_weekly_autoban_report() - - async def send_weekly_autoban_report(self, channel: discord.abc.Messageable = None) -> None: - """ - Send a list of autobans added in the last 7 days to the specified channel. - - If chanel is not specified, it is sent to #mod-meta. - """ - seven_days_ago = arrow.utcnow().shift(days=-7) - if not channel: - channel = self.bot.get_channel(Channels.mod_meta) - elif not is_mod_channel(channel): - # Silently fail if output is going to be a non-mod channel. - return - - added_autobans = defaultdict(list) - # Extract all autoban filters added in the past 7 days from each filter type - for filter_list, filters in self.bot.filter_list_cache.items(): - filter_type, allow = filter_list.split(".") - allow_type = "Allow list" if allow.lower() == "true" else "Deny list" - - for filter_content, filter_details in filters.items(): - created_at = arrow.get(filter_details["created_at"]) - updated_at = arrow.get(filter_details["updated_at"]) - # Default to empty string so that the in check below doesn't error on None type - comment = filter_details["comment"] or "" - if max(created_at, updated_at) > seven_days_ago and "[autoban]" in comment: - line = f"`{filter_content}`: {comment}" - added_autobans[f"**{filter_type} {allow_type}**"].append(line) - - # Nicely format the output so each filter list type is grouped - lines = [f"**Autoban filters added since {seven_days_ago.format('YYYY-MM-DD')}**"] - for filter_list, recently_added_autobans in added_autobans.items(): - lines.append("\n".join([filter_list]+recently_added_autobans)) - - if len(lines) == 1: - lines.append("Nothing to show") - - await channel.send("\n\n".join(lines)) - - async def cog_check(self, ctx: Context) -> bool: - """Only allow moderators to invoke the commands in this cog.""" - return await has_any_role(*constants.MODERATION_ROLES).predicate(ctx) - - async def cog_unload(self) -> None: - """Cancel the weekly autoban filter report on cog unload.""" - self.weekly_autoban_report_task.cancel() - - -async def setup(bot: Bot) -> None: - """Load the FilterLists cog.""" - await bot.add_cog(FilterLists(bot)) diff --git a/bot/exts/filters/filtering.py b/bot/exts/filters/filtering.py deleted file mode 100644 index 23a6f2d92..000000000 --- a/bot/exts/filters/filtering.py +++ /dev/null @@ -1,743 +0,0 @@ -import asyncio -import re -import unicodedata -import urllib.parse -from datetime import timedelta -from typing import Any, Dict, List, Mapping, NamedTuple, Optional, Tuple, Union - -import arrow -import dateutil.parser -import regex -import tldextract -from async_rediscache import RedisCache -from dateutil.relativedelta import relativedelta -from discord import ChannelType, Colour, Embed, Forbidden, HTTPException, Member, Message, NotFound, TextChannel -from discord.ext.commands import Cog -from discord.utils import escape_markdown -from pydis_core.site_api import ResponseCodeError -from pydis_core.utils import scheduling -from pydis_core.utils.regex import DISCORD_INVITE - -from bot.bot import Bot -from bot.constants import Bot as BotConfig, Channels, Colours, Filter, Guild, Icons, URLs -from bot.exts.events.code_jams._channels import CATEGORY_NAME as JAM_CATEGORY_NAME -from bot.exts.moderation.modlog import ModLog -from bot.log import get_logger -from bot.utils.helpers import remove_subdomain_from_url -from bot.utils.messages import format_user - -log = get_logger(__name__) - - -# Regular expressions -CODE_BLOCK_RE = re.compile( - r"(?P<delim>``?)[^`]+?(?P=delim)(?!`+)" # Inline codeblock - r"|```(.+?)```", # Multiline codeblock - re.DOTALL | re.MULTILINE -) -EVERYONE_PING_RE = re.compile(rf"@everyone|<@&{Guild.id}>|@here") -SPOILER_RE = re.compile(r"(\|\|.+?\|\|)", re.DOTALL) -URL_RE = re.compile(r"(https?://[^\s]+)", flags=re.IGNORECASE) - -# Exclude variation selectors from zalgo because they're actually invisible. -VARIATION_SELECTORS = r"\uFE00-\uFE0F\U000E0100-\U000E01EF" -INVISIBLE_RE = regex.compile(rf"[{VARIATION_SELECTORS}\p{{UNASSIGNED}}\p{{FORMAT}}\p{{CONTROL}}--\s]", regex.V1) -ZALGO_RE = regex.compile(rf"[\p{{NONSPACING MARK}}\p{{ENCLOSING MARK}}--[{VARIATION_SELECTORS}]]", regex.V1) - -# Other constants. -DAYS_BETWEEN_ALERTS = 3 -OFFENSIVE_MSG_DELETE_TIME = timedelta(days=Filter.offensive_msg_delete_days) - -# Autoban -LINK_PASSWORD = "https://support.discord.com/hc/en-us/articles/218410947-I-forgot-my-Password-Where-can-I-set-a-new-one" -LINK_2FA = "https://support.discord.com/hc/en-us/articles/219576828-Setting-up-Two-Factor-Authentication" -AUTO_BAN_REASON = ( - "Your account has been used to send links to a phishing website. You have been automatically banned. " - "If you are not aware of sending them, that means your account has been compromised.\n\n" - - f"Here is a guide from Discord on [how to change your password]({LINK_PASSWORD}).\n\n" - - f"We also highly recommend that you [enable 2 factor authentication on your account]({LINK_2FA}), " - "for heightened security.\n\n" - - "Once you have changed your password, feel free to follow the instructions at the bottom of " - "this message to appeal your ban." -) -AUTO_BAN_DURATION = timedelta(days=4) - -FilterMatch = Union[re.Match, dict, bool, List[Embed]] - - -class Stats(NamedTuple): - """Additional stats on a triggered filter to append to a mod log.""" - - message_content: str - additional_embeds: Optional[List[Embed]] - - -class Filtering(Cog): - """Filtering out invites, blacklisting domains, and warning us of certain regular expressions.""" - - # Redis cache mapping a user ID to the last timestamp a bad nickname alert was sent - name_alerts = RedisCache() - - def __init__(self, bot: Bot): - self.bot = bot - self.scheduler = scheduling.Scheduler(self.__class__.__name__) - self.name_lock = asyncio.Lock() - - staff_mistake_str = "If you believe this was a mistake, please let staff know!" - self.filters = { - "filter_zalgo": { - "enabled": Filter.filter_zalgo, - "function": self._has_zalgo, - "type": "filter", - "content_only": True, - "user_notification": Filter.notify_user_zalgo, - "notification_msg": ( - "Your post has been removed for abusing Unicode character rendering (aka Zalgo text). " - f"{staff_mistake_str}" - ), - "schedule_deletion": False - }, - "filter_invites": { - "enabled": Filter.filter_invites, - "function": self._has_invites, - "type": "filter", - "content_only": True, - "user_notification": Filter.notify_user_invites, - "notification_msg": ( - f"Per Rule 6, your invite link has been removed. {staff_mistake_str}\n\n" - r"Our server rules can be found here: <https://pythondiscord.com/pages/rules>" - ), - "schedule_deletion": False - }, - "filter_domains": { - "enabled": Filter.filter_domains, - "function": self._has_urls, - "type": "filter", - "content_only": True, - "user_notification": Filter.notify_user_domains, - "notification_msg": ( - f"Your URL has been removed because it matched a blacklisted domain. {staff_mistake_str}" - ), - "schedule_deletion": False - }, - "watch_regex": { - "enabled": Filter.watch_regex, - "function": self._has_watch_regex_match, - "type": "watchlist", - "content_only": True, - "schedule_deletion": True - }, - "watch_rich_embeds": { - "enabled": Filter.watch_rich_embeds, - "function": self._has_rich_embed, - "type": "watchlist", - "content_only": False, - "schedule_deletion": False - }, - "filter_everyone_ping": { - "enabled": Filter.filter_everyone_ping, - "function": self._has_everyone_ping, - "type": "filter", - "content_only": True, - "user_notification": Filter.notify_user_everyone_ping, - "notification_msg": ( - "Please don't try to ping `@everyone` or `@here`. " - f"Your message has been removed. {staff_mistake_str}" - ), - "schedule_deletion": False, - "ping_everyone": False - }, - } - - async def cog_unload(self) -> None: - """Cancel scheduled tasks.""" - self.scheduler.cancel_all() - - def _get_filterlist_items(self, list_type: str, *, allowed: bool) -> list: - """Fetch items from the filter_list_cache.""" - return self.bot.filter_list_cache[f"{list_type.upper()}.{allowed}"].keys() - - def _get_filterlist_value(self, list_type: str, value: Any, *, allowed: bool) -> dict: - """Fetch one specific value from filter_list_cache.""" - return self.bot.filter_list_cache[f"{list_type.upper()}.{allowed}"][value] - - @staticmethod - def _expand_spoilers(text: str) -> str: - """Return a string containing all interpretations of a spoilered message.""" - split_text = SPOILER_RE.split(text) - return ''.join( - split_text[0::2] + split_text[1::2] + split_text - ) - - @property - def mod_log(self) -> ModLog: - """Get currently loaded ModLog cog instance.""" - return self.bot.get_cog("ModLog") - - @Cog.listener() - async def on_message(self, msg: Message) -> None: - """Invoke message filter for new messages.""" - await self._filter_message(msg) - - # Ignore webhook messages. - if msg.webhook_id is None: - await self.check_bad_words_in_name(msg.author) - - @Cog.listener() - async def on_message_edit(self, before: Message, after: Message) -> None: - """ - Invoke message filter for message edits. - - Also calculates the time delta from the previous edit or when message was sent if there's no prior edits. - """ - # We only care about changes to the message contents/attachments and embed additions, not pin status etc. - if all(( - before.content == after.content, # content hasn't changed - before.attachments == after.attachments, # attachments haven't changed - len(before.embeds) >= len(after.embeds) # embeds haven't been added - )): - return - - if not before.edited_at: - delta = relativedelta(after.edited_at, before.created_at).microseconds - else: - delta = relativedelta(after.edited_at, before.edited_at).microseconds - await self._filter_message(after, delta) - - @Cog.listener() - async def on_voice_state_update(self, member: Member, *_) -> None: - """Checks for bad words in usernames when users join, switch or leave a voice channel.""" - await self.check_bad_words_in_name(member) - - def get_name_match(self, name: str) -> Optional[re.Match]: - """Check bad words from passed string (name). Return the first match found.""" - normalised_name = unicodedata.normalize("NFKC", name) - cleaned_normalised_name = "".join([c for c in normalised_name if not unicodedata.combining(c)]) - - # Run filters against normalised, cleaned normalised and the original name, - # in case we have filters for one but not the other. - names_to_check = (name, normalised_name, cleaned_normalised_name) - - watchlist_patterns = self._get_filterlist_items('filter_token', allowed=False) - for pattern in watchlist_patterns: - for name in names_to_check: - if match := re.search(pattern, name, flags=re.IGNORECASE): - return match - return None - - async def check_send_alert(self, member: Member) -> bool: - """When there is less than 3 days after last alert, return `False`, otherwise `True`.""" - if last_alert := await self.name_alerts.get(member.id): - last_alert = arrow.get(last_alert) - if arrow.utcnow() - timedelta(days=DAYS_BETWEEN_ALERTS) < last_alert: - log.trace(f"Last alert was too recent for {member}'s nickname.") - return False - - return True - - async def check_bad_words_in_name(self, member: Member) -> None: - """Send a mod alert every 3 days if a username still matches a watchlist pattern.""" - # Use lock to avoid race conditions - async with self.name_lock: - # Check if we recently alerted about this user first, - # to avoid running all the filter tokens against their name again. - if not await self.check_send_alert(member): - return - - # Check whether the users display name contains any words in our blacklist - match = self.get_name_match(member.display_name) - if not match: - return - - log.info(f"Sending bad nickname alert for '{member.display_name}' ({member.id}).") - - log_string = ( - f"**User:** {format_user(member)}\n" - f"**Display Name:** {escape_markdown(member.display_name)}\n" - f"**Bad Match:** {match.group()}" - ) - - await self.mod_log.send_log_message( - content=str(member.id), # quality-of-life improvement for mobile moderators - icon_url=Icons.token_removed, - colour=Colours.soft_red, - title="Username filtering alert", - text=log_string, - channel_id=Channels.mod_alerts, - thumbnail=member.display_avatar.url, - ping_everyone=True - ) - - # Update time when alert sent - await self.name_alerts.set(member.id, arrow.utcnow().timestamp()) - - async def filter_snekbox_output(self, result: str, msg: Message) -> bool: - """ - Filter the result of a snekbox command to see if it violates any of our rules, and then respond accordingly. - - Also requires the original message, to check whether to filter and for mod logs. - Returns whether a filter was triggered or not. - """ - filter_triggered = False - # Should we filter this message? - if self._check_filter(msg): - for filter_name, _filter in self.filters.items(): - # Is this specific filter enabled in the config? - # We also do not need to worry about filters that take the full message, - # since all we have is an arbitrary string. - if _filter["enabled"] and _filter["content_only"]: - filter_result = await _filter["function"](result) - reason = None - - if isinstance(filter_result, tuple): - match, reason = filter_result - else: - match = filter_result - - if match: - # If this is a filter (not a watchlist), we set the variable so we know - # that it has been triggered - if _filter["type"] == "filter": - filter_triggered = True - - stats = self._add_stats(filter_name, match, result) - await self._send_log(filter_name, _filter, msg, stats, reason, is_eval=True) - - break # We don't want multiple filters to trigger - - return filter_triggered - - async def _filter_message(self, msg: Message, delta: Optional[int] = None) -> None: - """Filter the input message to see if it violates any of our rules, and then respond accordingly.""" - # Should we filter this message? - if self._check_filter(msg): - for filter_name, _filter in self.filters.items(): - # Is this specific filter enabled in the config? - if _filter["enabled"]: - # Double trigger check for the embeds filter - if filter_name == "watch_rich_embeds": - # If the edit delta is less than 0.001 seconds, then we're probably dealing - # with a double filter trigger. - if delta is not None and delta < 100: - continue - - if filter_name in ("filter_invites", "filter_everyone_ping"): - # Disable invites filter in codejam team channels - category = getattr(msg.channel, "category", None) - if category and category.name == JAM_CATEGORY_NAME: - continue - - # Does the filter only need the message content or the full message? - if _filter["content_only"]: - payload = msg.content - else: - payload = msg - - result = await _filter["function"](payload) - reason = None - - if isinstance(result, tuple): - match, reason = result - else: - match = result - - if match: - is_private = msg.channel.type is ChannelType.private - - # If this is a filter (not a watchlist) and not in a DM, delete the message. - if _filter["type"] == "filter" and not is_private: - try: - # Embeds (can?) trigger both the `on_message` and `on_message_edit` - # event handlers, triggering filtering twice for the same message. - # - # If `on_message`-triggered filtering already deleted the message - # then `on_message_edit`-triggered filtering will raise exception - # since the message no longer exists. - # - # In addition, to avoid sending two notifications to the user, the - # logs, and mod_alert, we return if the message no longer exists. - await msg.delete() - except NotFound: - return - - # Notify the user if the filter specifies - if _filter["user_notification"]: - await self.notify_member(msg.author, _filter["notification_msg"], msg.channel) - - # If the message is classed as offensive, we store it in the site db and - # it will be deleted after one week. - if _filter["schedule_deletion"] and not is_private: - delete_date = (msg.created_at + OFFENSIVE_MSG_DELETE_TIME).isoformat() - data = { - 'id': msg.id, - 'channel_id': msg.channel.id, - 'delete_date': delete_date - } - - try: - await self.bot.api_client.post('bot/offensive-messages', json=data) - except ResponseCodeError as e: - if e.status == 400 and "already exists" in e.response_json.get("id", [""])[0]: - log.debug(f"Offensive message {msg.id} already exists.") - else: - log.error(f"Offensive message {msg.id} failed to post: {e}") - else: - self.schedule_msg_delete(data) - log.trace(f"Offensive message {msg.id} will be deleted on {delete_date}") - - stats = self._add_stats(filter_name, match, msg.content) - - # If the filter reason contains `[autoban]`, we want to auto-ban the user. - # Also pass this to _send_log so mods are not pinged filter matches that are auto-actioned - autoban = reason and "[autoban]" in reason.lower() - if not autoban and filter_name == "filter_invites" and isinstance(result, dict): - autoban = any( - "[autoban]" in invite_info["reason"].lower() - for invite_info in result.values() - if invite_info.get("reason") - ) - - await self._send_log(filter_name, _filter, msg, stats, reason, autoban=autoban) - - if autoban: - # Create a new context, with the author as is the bot, and the channel as #mod-alerts. - # This sends the ban confirmation directly under watchlist trigger embed, to inform - # mods that the user was auto-banned for the message. - context = await self.bot.get_context(msg) - context.guild = self.bot.get_guild(Guild.id) - context.author = context.guild.get_member(self.bot.user.id) - context.channel = self.bot.get_channel(Channels.mod_alerts) - context.command = self.bot.get_command("tempban") - - await context.invoke( - context.command, - msg.author, - (arrow.utcnow() + AUTO_BAN_DURATION).datetime, - reason=AUTO_BAN_REASON - ) - - break # We don't want multiple filters to trigger - - async def _send_log( - self, - filter_name: str, - _filter: Dict[str, Any], - msg: Message, - stats: Stats, - reason: Optional[str] = None, - *, - is_eval: bool = False, - autoban: bool = False, - ) -> None: - """Send a mod log for a triggered filter.""" - if msg.channel.type is ChannelType.private: - channel_str = "via DM" - ping_everyone = False - else: - channel_str = f"in {msg.channel.mention}" - # Allow specific filters to override ping_everyone - ping_everyone = Filter.ping_everyone and _filter.get("ping_everyone", True) - - content = str(msg.author.id) # quality-of-life improvement for mobile moderators - - # If we are going to autoban, we don't want to ping and don't need the user ID - if autoban: - ping_everyone = False - content = None - - eval_msg = f"using {BotConfig.prefix}eval " if is_eval else "" - footer = f"Reason: {reason}" if reason else None - message = ( - f"The {filter_name} {_filter['type']} was triggered by {format_user(msg.author)} " - f"{channel_str} {eval_msg}with [the following message]({msg.jump_url}):\n\n" - f"{stats.message_content}" - ) - - log.debug(message) - - # Send pretty mod log embed to mod-alerts - await self.mod_log.send_log_message( - content=content, - icon_url=Icons.filtering, - colour=Colour(Colours.soft_red), - title=f"{_filter['type'].title()} triggered!", - text=message, - thumbnail=msg.author.display_avatar.url, - channel_id=Channels.mod_alerts, - ping_everyone=ping_everyone, - additional_embeds=stats.additional_embeds, - footer=footer, - ) - - def _add_stats(self, name: str, match: FilterMatch, content: str) -> Stats: - """Adds relevant statistical information to the relevant filter and increments the bot's stats.""" - # Word and match stats for watch_regex - if name == "watch_regex": - surroundings = match.string[max(match.start() - 10, 0): match.end() + 10] - message_content = ( - f"**Match:** '{match[0]}'\n" - f"**Location:** '...{escape_markdown(surroundings)}...'\n" - f"\n**Original Message:**\n{escape_markdown(content)}" - ) - else: # Use original content - message_content = content - - additional_embeds = None - - self.bot.stats.incr(f"filters.{name}") - - # The function returns True for invalid invites. - # They have no data so additional embeds can't be created for them. - if name == "filter_invites" and match is not True: - additional_embeds = [] - for _, data in match.items(): - reason = f"Reason: {data['reason']} | " if data.get('reason') else "" - embed = Embed(description=( - f"**Members:**\n{data['members']}\n" - f"**Active:**\n{data['active']}" - )) - embed.set_author(name=data["name"]) - embed.set_thumbnail(url=data["icon"]) - embed.set_footer(text=f"{reason}Guild ID: {data['id']}") - additional_embeds.append(embed) - - elif name == "watch_rich_embeds": - additional_embeds = match - - return Stats(message_content, additional_embeds) - - @staticmethod - def _check_filter(msg: Message) -> bool: - """Check whitelists to see if we should filter this message.""" - role_whitelisted = False - - if type(msg.author) is Member: # Only Member has roles, not User. - for role in msg.author.roles: - if role.id in Filter.role_whitelist: - role_whitelisted = True - - return ( - msg.channel.id not in Filter.channel_whitelist # Channel not in whitelist - and not role_whitelisted # Role not in whitelist - and not msg.author.bot # Author not a bot - ) - - async def _has_watch_regex_match(self, text: str) -> Tuple[Union[bool, re.Match], Optional[str]]: - """ - Return True if `text` matches any regex from `word_watchlist` or `token_watchlist` configs. - - `word_watchlist`'s patterns are placed between word boundaries while `token_watchlist` is - matched as-is. Spoilers are expanded, if any, and URLs are ignored. - Second return value is a reason written to database about blacklist entry (can be None). - """ - if SPOILER_RE.search(text): - text = self._expand_spoilers(text) - - text = self.clean_input(text) - - watchlist_patterns = self._get_filterlist_items('filter_token', allowed=False) - for pattern in watchlist_patterns: - match = re.search(pattern, text, flags=re.IGNORECASE) - if match: - return match, self._get_filterlist_value('filter_token', pattern, allowed=False)['comment'] - - return False, None - - async def _has_urls(self, text: str) -> Tuple[bool, Optional[str]]: - """ - Returns True if the text contains one of the blacklisted URLs from the config file. - - Second return value is a reason of URL blacklisting (can be None). - """ - text = self.clean_input(text) - - domain_blacklist = self._get_filterlist_items("domain_name", allowed=False) - for match in URL_RE.finditer(text): - for url in domain_blacklist: - if url.lower() in match.group(1).lower(): - blacklisted_parsed = tldextract.extract(url.lower()) - url_parsed = tldextract.extract(match.group(1).lower()) - if blacklisted_parsed.registered_domain == url_parsed.registered_domain: - return True, self._get_filterlist_value("domain_name", url, allowed=False)["comment"] - return False, None - - @staticmethod - async def _has_zalgo(text: str) -> bool: - """ - Returns True if the text contains zalgo characters. - - Zalgo range is \u0300 – \u036F and \u0489. - """ - return bool(ZALGO_RE.search(text)) - - async def _has_invites(self, text: str) -> Union[dict, bool]: - """ - Checks if there's any invites in the text content that aren't in the guild whitelist. - - If any are detected, a dictionary of invite data is returned, with a key per invite. - If none are detected, False is returned. - If we are unable to process an invite, True is returned. - - Attempts to catch some of common ways to try to cheat the system. - """ - text = self.clean_input(text) - - # Remove backslashes to prevent escape character fuckaroundery like - # discord\.gg/gdudes-pony-farm - text = text.replace("\\", "") - - invites = [m.group("invite") for m in DISCORD_INVITE.finditer(text)] - invite_data = dict() - for invite in invites: - invite = urllib.parse.quote_plus(invite.rstrip("/")) - if invite in invite_data: - continue - - response = await self.bot.http_session.get( - f"{URLs.discord_invite_api}/{invite}", params={"with_counts": "true"} - ) - response = await response.json() - guild = response.get("guild") - if guild is None: - # Lack of a "guild" key in the JSON response indicates either an group DM invite, an - # expired invite, or an invalid invite. The API does not currently differentiate - # between invalid and expired invites - return True - - guild_id = guild.get("id") - guild_invite_whitelist = self._get_filterlist_items("guild_invite", allowed=True) - guild_invite_blacklist = self._get_filterlist_items("guild_invite", allowed=False) - - # Is this invite allowed? - guild_partnered_or_verified = ( - 'PARTNERED' in guild.get("features", []) - or 'VERIFIED' in guild.get("features", []) - ) - invite_not_allowed = ( - guild_id in guild_invite_blacklist # Blacklisted guilds are never permitted. - or guild_id not in guild_invite_whitelist # Whitelisted guilds are always permitted. - and not guild_partnered_or_verified # Otherwise guilds have to be Verified or Partnered. - ) - - if invite_not_allowed: - reason = None - if guild_id in guild_invite_blacklist: - reason = self._get_filterlist_value("guild_invite", guild_id, allowed=False)["comment"] - - guild_icon_hash = guild["icon"] - guild_icon = ( - "https://cdn.discordapp.com/icons/" - f"{guild_id}/{guild_icon_hash}.png?size=512" - ) - - invite_data[invite] = { - "name": guild["name"], - "id": guild['id'], - "icon": guild_icon, - "members": response["approximate_member_count"], - "active": response["approximate_presence_count"], - "reason": reason - } - - return invite_data if invite_data else False - - @staticmethod - async def _has_rich_embed(msg: Message) -> Union[bool, List[Embed]]: - """Determines if `msg` contains any rich embeds not auto-generated from a URL.""" - if msg.embeds: - for embed in msg.embeds: - if embed.type == "rich": - urls = URL_RE.findall(msg.content) - final_urls = set(urls) - # This is due to way discord renders relative urls in Embdes - # if we send the following url: https://mobile.twitter.com/something - # Discord renders it as https://twitter.com/something - for url in urls: - final_urls.add(remove_subdomain_from_url(url)) - if not embed.url or embed.url not in final_urls: - # If `embed.url` does not exist or if `embed.url` is not part of the content - # of the message, it's unlikely to be an auto-generated embed by Discord. - return msg.embeds - else: - log.trace( - "Found a rich embed sent by a regular user account, " - "but it was likely just an automatic URL embed." - ) - return False - return False - - @staticmethod - async def _has_everyone_ping(text: str) -> bool: - """Determines if `msg` contains an @everyone or @here ping outside of a codeblock.""" - # First pass to avoid running re.sub on every message - if not EVERYONE_PING_RE.search(text): - return False - - content_without_codeblocks = CODE_BLOCK_RE.sub("", text) - return bool(EVERYONE_PING_RE.search(content_without_codeblocks)) - - async def notify_member(self, filtered_member: Member, reason: str, channel: TextChannel) -> None: - """ - Notify filtered_member about a moderation action with the reason str. - - First attempts to DM the user, fall back to in-channel notification if user has DMs disabled - """ - try: - await filtered_member.send(reason) - except Forbidden: - await channel.send(f"{filtered_member.mention} {reason}") - - def schedule_msg_delete(self, msg: dict) -> None: - """Delete an offensive message once its deletion date is reached.""" - delete_at = dateutil.parser.isoparse(msg['delete_date']) - self.scheduler.schedule_at(delete_at, msg['id'], self.delete_offensive_msg(msg)) - - async def cog_load(self) -> None: - """Get all the pending message deletion from the API and reschedule them.""" - await self.bot.wait_until_ready() - response = await self.bot.api_client.get('bot/offensive-messages',) - - now = arrow.utcnow() - - for msg in response: - delete_at = dateutil.parser.isoparse(msg['delete_date']) - - if delete_at < now: - await self.delete_offensive_msg(msg) - else: - self.schedule_msg_delete(msg) - - async def delete_offensive_msg(self, msg: Mapping[str, int]) -> None: - """Delete an offensive message, and then delete it from the db.""" - try: - channel = self.bot.get_channel(msg['channel_id']) - if channel: - msg_obj = await channel.fetch_message(msg['id']) - await msg_obj.delete() - except NotFound: - log.info( - f"Tried to delete message {msg['id']}, but the message can't be found " - f"(it has been probably already deleted)." - ) - except HTTPException as e: - log.warning(f"Failed to delete message {msg['id']}: status {e.status}") - - await self.bot.api_client.delete(f'bot/offensive-messages/{msg["id"]}') - log.info(f"Deleted the offensive message with id {msg['id']}.") - - @staticmethod - def clean_input(string: str) -> str: - """Remove zalgo and invisible characters from `string`.""" - # For future consideration: remove characters in the Mc, Sk, and Lm categories too. - # Can be normalised with form C to merge char + combining char into a single char to avoid - # removing legit diacritics, but this would open up a way to bypass filters. - no_zalgo = ZALGO_RE.sub("", string) - return INVISIBLE_RE.sub("", no_zalgo) - - -async def setup(bot: Bot) -> None: - """Load the Filtering cog.""" - await bot.add_cog(Filtering(bot)) diff --git a/bot/exts/filters/webhook_remover.py b/bot/exts/filters/webhook_remover.py deleted file mode 100644 index b42613804..000000000 --- a/bot/exts/filters/webhook_remover.py +++ /dev/null @@ -1,94 +0,0 @@ -import re - -from discord import Colour, Message, NotFound -from discord.ext.commands import Cog - -from bot.bot import Bot -from bot.constants import Channels, Colours, Event, Icons -from bot.exts.moderation.modlog import ModLog -from bot.log import get_logger -from bot.utils.messages import format_user - -WEBHOOK_URL_RE = re.compile( - r"((?:https?:\/\/)?(?:ptb\.|canary\.)?discord(?:app)?\.com\/api\/webhooks\/\d+\/)\S+\/?", - re.IGNORECASE -) - -ALERT_MESSAGE_TEMPLATE = ( - "{user}, looks like you posted a Discord webhook URL. Therefore, your " - "message has been removed, and your webhook has been deleted. " - "You can re-create it if you wish to. If you believe this was a " - "mistake, please let us know." -) - -log = get_logger(__name__) - - -class WebhookRemover(Cog): - """Scan messages to detect Discord webhooks links.""" - - def __init__(self, bot: Bot): - self.bot = bot - - @property - def mod_log(self) -> ModLog: - """Get current instance of `ModLog`.""" - return self.bot.get_cog("ModLog") - - async def delete_and_respond(self, msg: Message, redacted_url: str, *, webhook_deleted: bool) -> None: - """Delete `msg` and send a warning that it contained the Discord webhook `redacted_url`.""" - # Don't log this, due internal delete, not by user. Will make different entry. - self.mod_log.ignore(Event.message_delete, msg.id) - - try: - await msg.delete() - except NotFound: - log.debug(f"Failed to remove webhook in message {msg.id}: message already deleted.") - return - - await msg.channel.send(ALERT_MESSAGE_TEMPLATE.format(user=msg.author.mention)) - if webhook_deleted: - delete_state = "The webhook was successfully deleted." - else: - delete_state = "There was an error when deleting the webhook, it might have already been removed." - message = ( - f"{format_user(msg.author)} posted a Discord webhook URL to {msg.channel.mention}. {delete_state} " - f"Webhook URL was `{redacted_url}`" - ) - log.debug(message) - - # Send entry to moderation alerts. - await self.mod_log.send_log_message( - icon_url=Icons.token_removed, - colour=Colour(Colours.soft_red), - title="Discord webhook URL removed!", - text=message, - thumbnail=msg.author.display_avatar.url, - channel_id=Channels.mod_alerts - ) - - self.bot.stats.incr("tokens.removed_webhooks") - - @Cog.listener() - async def on_message(self, msg: Message) -> None: - """Check if a Discord webhook URL is in `message`.""" - # Ignore DMs; can't delete messages in there anyway. - if not msg.guild or msg.author.bot: - return - - matches = WEBHOOK_URL_RE.search(msg.content) - if matches: - async with self.bot.http_session.delete(matches[0]) as resp: - # The Discord API Returns a 204 NO CONTENT response on success. - deleted_successfully = resp.status == 204 - await self.delete_and_respond(msg, matches[1] + "xxx", webhook_deleted=deleted_successfully) - - @Cog.listener() - async def on_message_edit(self, before: Message, after: Message) -> None: - """Check if a Discord webhook URL is in the edited message `after`.""" - await self.on_message(after) - - -async def setup(bot: Bot) -> None: - """Load `WebhookRemover` cog.""" - await bot.add_cog(WebhookRemover(bot)) diff --git a/bot/exts/info/codeblock/_cog.py b/bot/exts/info/codeblock/_cog.py index 073a91a53..e72f32887 100644 --- a/bot/exts/info/codeblock/_cog.py +++ b/bot/exts/info/codeblock/_cog.py @@ -8,8 +8,8 @@ from pydis_core.utils import scheduling from bot import constants from bot.bot import Bot -from bot.exts.filters.token_remover import TokenRemover -from bot.exts.filters.webhook_remover import WEBHOOK_URL_RE +from bot.exts.filtering._filters.unique.discord_token import DiscordTokenFilter +from bot.exts.filtering._filters.unique.webhook import WEBHOOK_URL_RE from bot.exts.help_channels._channel import is_help_forum_post from bot.exts.info.codeblock._instructions import get_instructions from bot.log import get_logger @@ -135,7 +135,7 @@ class CodeBlockCog(Cog, name="Code Block"): not message.author.bot and self.is_valid_channel(message.channel) and has_lines(message.content, constants.CodeBlock.minimum_lines) - and not TokenRemover.find_token_in_message(message) + and not DiscordTokenFilter.find_token_in_message(message.content) and not WEBHOOK_URL_RE.search(message.content) ) diff --git a/bot/exts/moderation/clean.py b/bot/exts/moderation/clean.py index fd9404b1a..aee751345 100644 --- a/bot/exts/moderation/clean.py +++ b/bot/exts/moderation/clean.py @@ -19,6 +19,7 @@ from bot.converters import Age, ISODateTime from bot.exts.moderation.modlog import ModLog from bot.log import get_logger from bot.utils.channel import is_mod_channel +from bot.utils.messages import upload_log log = get_logger(__name__) @@ -351,7 +352,7 @@ class Clean(Cog): # Reverse the list to have reverse chronological order log_messages = reversed(messages) - log_url = await self.mod_log.upload_log(log_messages, ctx.author.id) + log_url = await upload_log(log_messages, ctx.author.id) # Build the embed and send it if channels == "*": diff --git a/bot/exts/moderation/infraction/infractions.py b/bot/exts/moderation/infraction/infractions.py index d61a3fa5c..e785216c9 100644 --- a/bot/exts/moderation/infraction/infractions.py +++ b/bot/exts/moderation/infraction/infractions.py @@ -14,7 +14,6 @@ from bot.bot import Bot from bot.constants import Channels, Event from bot.converters import Age, Duration, DurationOrExpiry, MemberOrUser, UnambiguousMemberOrUser from bot.decorators import ensure_future_timestamp, respect_role_hierarchy -from bot.exts.filters.filtering import AUTO_BAN_DURATION, AUTO_BAN_REASON from bot.exts.moderation.infraction import _utils from bot.exts.moderation.infraction._scheduler import InfractionScheduler from bot.log import get_logger @@ -30,6 +29,23 @@ if t.TYPE_CHECKING: from bot.exts.moderation.watchchannels.bigbrother import BigBrother +# Comp ban +LINK_PASSWORD = "https://support.discord.com/hc/en-us/articles/218410947-I-forgot-my-Password-Where-can-I-set-a-new-one" +LINK_2FA = "https://support.discord.com/hc/en-us/articles/219576828-Setting-up-Two-Factor-Authentication" +COMP_BAN_REASON = ( + "Your account has been used to send links to a phishing website. You have been automatically banned. " + "If you are not aware of sending them, that means your account has been compromised.\n\n" + + f"Here is a guide from Discord on [how to change your password]({LINK_PASSWORD}).\n\n" + + f"We also highly recommend that you [enable 2 factor authentication on your account]({LINK_2FA}), " + "for heightened security.\n\n" + + "Once you have changed your password, feel free to follow the instructions at the bottom of " + "this message to appeal your ban." +) +COMP_BAN_DURATION = timedelta(days=4) +# Timeout MAXIMUM_TIMEOUT_DAYS = timedelta(days=28) TIMEOUT_CAP_MESSAGE = ( f"The timeout for {{0}} can't be longer than {MAXIMUM_TIMEOUT_DAYS.days} days." @@ -51,7 +67,7 @@ class Infractions(InfractionScheduler, commands.Cog): # region: Permanent infractions - @command() + @command(aliases=("warning",)) async def warn(self, ctx: Context, user: UnambiguousMemberOrUser, *, reason: t.Optional[str] = None) -> None: """Warn a user for the given reason.""" if not isinstance(user, Member): @@ -147,7 +163,7 @@ class Infractions(InfractionScheduler, commands.Cog): @command() async def compban(self, ctx: Context, user: UnambiguousMemberOrUser) -> None: """Same as cleanban, but specifically with the ban reason and duration used for compromised accounts.""" - await self.cleanban(ctx, user, duration=(arrow.utcnow() + AUTO_BAN_DURATION).datetime, reason=AUTO_BAN_REASON) + await self.cleanban(ctx, user, duration=(arrow.utcnow() + COMP_BAN_DURATION).datetime, reason=COMP_BAN_REASON) @command(aliases=("vban",)) async def voiceban(self, ctx: Context) -> None: diff --git a/bot/exts/moderation/modlog.py b/bot/exts/moderation/modlog.py index 2c94d1af8..47a21753c 100644 --- a/bot/exts/moderation/modlog.py +++ b/bot/exts/moderation/modlog.py @@ -3,7 +3,6 @@ import difflib import itertools import typing as t from datetime import datetime, timezone -from itertools import zip_longest import discord from dateutil.relativedelta import relativedelta @@ -12,14 +11,12 @@ from discord import Colour, Message, Thread from discord.abc import GuildChannel from discord.ext.commands import Cog, Context from discord.utils import escape_markdown, format_dt, snowflake_time -from pydis_core.site_api import ResponseCodeError -from sentry_sdk import add_breadcrumb from bot.bot import Bot -from bot.constants import Channels, Colours, Emojis, Event, Guild as GuildConstant, Icons, Roles, URLs +from bot.constants import Channels, Colours, Emojis, Event, Guild as GuildConstant, Icons, Roles from bot.log import get_logger from bot.utils import time -from bot.utils.messages import format_user +from bot.utils.messages import format_user, upload_log log = get_logger(__name__) @@ -45,48 +42,6 @@ class ModLog(Cog, name="ModLog"): self._cached_edits = [] - async def upload_log( - self, - messages: t.Iterable[discord.Message], - actor_id: int, - attachments: t.Iterable[t.List[str]] = None - ) -> str: - """Upload message logs to the database and return a URL to a page for viewing the logs.""" - if attachments is None: - attachments = [] - - deletedmessage_set = [ - { - "id": message.id, - "author": message.author.id, - "channel_id": message.channel.id, - "content": message.content.replace("\0", ""), # Null chars cause 400. - "embeds": [embed.to_dict() for embed in message.embeds], - "attachments": attachment, - } - for message, attachment in zip_longest(messages, attachments, fillvalue=[]) - ] - - try: - response = await self.bot.api_client.post( - "bot/deleted-messages", - json={ - "actor": actor_id, - "creation": datetime.now(timezone.utc).isoformat(), - "deletedmessage_set": deletedmessage_set, - } - ) - except ResponseCodeError as e: - add_breadcrumb( - category="api_error", - message=str(e), - level="error", - data=deletedmessage_set, - ) - raise - - return f"{URLs.site_logs_view}/{response['id']}" - def ignore(self, event: Event, *items: int) -> None: """Add event to ignored events to suppress log emission.""" for item in items: @@ -604,7 +559,7 @@ class ModLog(Cog, name="ModLog"): remaining_chars = 4090 - len(response) if len(content) > remaining_chars: - botlog_url = await self.upload_log(messages=[message], actor_id=message.author.id) + botlog_url = await upload_log(messages=[message], actor_id=message.author.id) ending = f"\n\nMessage truncated, [full message here]({botlog_url})." truncation_point = remaining_chars - len(ending) content = f"{content[:truncation_point]}...{ending}" diff --git a/bot/exts/moderation/watchchannels/_watchchannel.py b/bot/exts/moderation/watchchannels/_watchchannel.py index bc70a8c1d..7566021c5 100644 --- a/bot/exts/moderation/watchchannels/_watchchannel.py +++ b/bot/exts/moderation/watchchannels/_watchchannel.py @@ -14,8 +14,8 @@ from pydis_core.utils import scheduling from bot.bot import Bot from bot.constants import BigBrother as BigBrotherConfig, Guild as GuildConfig, Icons -from bot.exts.filters.token_remover import TokenRemover -from bot.exts.filters.webhook_remover import WEBHOOK_URL_RE +from bot.exts.filtering._filters.unique.discord_token import DiscordTokenFilter +from bot.exts.filtering._filters.unique.webhook import WEBHOOK_URL_RE from bot.exts.moderation.modlog import ModLog from bot.log import CustomLogger, get_logger from bot.pagination import LinePaginator @@ -235,7 +235,7 @@ class WatchChannel(metaclass=CogABCMeta): await self.send_header(msg) - if TokenRemover.find_token_in_message(msg) or WEBHOOK_URL_RE.search(msg.content): + if DiscordTokenFilter.find_token_in_message(msg.content) or WEBHOOK_URL_RE.search(msg.content): cleaned_content = "Content is censored because it contains a bot or webhook token." elif cleaned_content := msg.clean_content: # Put all non-media URLs in a code block to prevent embeds diff --git a/bot/exts/utils/snekbox/_cog.py b/bot/exts/utils/snekbox/_cog.py index b48fcf592..567fe6c24 100644 --- a/bot/exts/utils/snekbox/_cog.py +++ b/bot/exts/utils/snekbox/_cog.py @@ -14,10 +14,10 @@ from pydis_core.utils import interactions from pydis_core.utils.regex import FORMATTED_CODE_REGEX, RAW_CODE_REGEX from bot.bot import Bot -from bot.constants import Channels, Emojis, Filter, MODERATION_ROLES, Roles, URLs +from bot.constants import Channels, Emojis, MODERATION_ROLES, Roles, STAFF_PARTNERS_COMMUNITY_ROLES, URLs from bot.decorators import redirect_output from bot.exts.events.code_jams._channels import CATEGORY_NAME as JAM_CATEGORY_NAME -from bot.exts.filters.antimalware import TXT_LIKE_FILES +from bot.exts.filtering._filter_lists.extension import TXT_LIKE_FILES from bot.exts.help_channels._channel import is_help_forum_post from bot.exts.utils.snekbox._eval import EvalJob, EvalResult from bot.exts.utils.snekbox._io import FileAttachment @@ -27,7 +27,7 @@ from bot.utils.lock import LockedResourceError, lock_arg from bot.utils.services import PasteTooLongError, PasteUploadError if TYPE_CHECKING: - from bot.exts.filters.filtering import Filtering + from bot.exts.filtering.filtering import Filtering log = get_logger(__name__) @@ -296,7 +296,7 @@ class Snekbox(Cog): """Filter to restrict files to allowed extensions. Return a named tuple of allowed and blocked files lists.""" # Check if user is staff, if is, return # Since we only care that roles exist to iterate over, check for the attr rather than a User/Member instance - if hasattr(ctx.author, "roles") and any(role.id in Filter.role_whitelist for role in ctx.author.roles): + if hasattr(ctx.author, "roles") and any(role.id in STAFF_PARTNERS_COMMUNITY_ROLES for role in ctx.author.roles): return FilteredFiles(files, []) # Ignore code jam channels if getattr(ctx.channel, "category", None) and ctx.channel.category.name == JAM_CATEGORY_NAME: diff --git a/bot/pagination.py b/bot/pagination.py index c39ce211b..679108933 100644 --- a/bot/pagination.py +++ b/bot/pagination.py @@ -204,6 +204,7 @@ class LinePaginator(Paginator): footer_text: str = None, url: str = None, exception_on_empty_embed: bool = False, + reply: bool = False, ) -> t.Optional[discord.Message]: """ Use a paginator and set of reactions to provide pagination over a set of lines. @@ -254,6 +255,8 @@ class LinePaginator(Paginator): embed.description = paginator.pages[current_page] + reference = ctx.message if reply else None + if len(paginator.pages) <= 1: if footer_text: embed.set_footer(text=footer_text) @@ -264,9 +267,10 @@ class LinePaginator(Paginator): log.trace(f"Setting embed url to '{url}'") log.debug("There's less than two pages, so we won't paginate - sending single page on its own") + if isinstance(ctx, discord.Interaction): return await ctx.response.send_message(embed=embed) - return await ctx.send(embed=embed) + return await ctx.send(embed=embed, reference=reference) else: if footer_text: embed.set_footer(text=f"{footer_text} (Page {current_page + 1}/{len(paginator.pages)})") @@ -279,11 +283,12 @@ class LinePaginator(Paginator): log.trace(f"Setting embed url to '{url}'") log.debug("Sending first page to channel...") + if isinstance(ctx, discord.Interaction): await ctx.response.send_message(embed=embed) message = await ctx.original_response() else: - message = await ctx.send(embed=embed) + message = await ctx.send(embed=embed, reference=reference) log.debug("Adding emoji reactions to message...") diff --git a/bot/rules/__init__.py b/bot/rules/__init__.py deleted file mode 100644 index a01ceae73..000000000 --- a/bot/rules/__init__.py +++ /dev/null @@ -1,12 +0,0 @@ -# flake8: noqa - -from .attachments import apply as apply_attachments -from .burst import apply as apply_burst -from .burst_shared import apply as apply_burst_shared -from .chars import apply as apply_chars -from .discord_emojis import apply as apply_discord_emojis -from .duplicates import apply as apply_duplicates -from .links import apply as apply_links -from .mentions import apply as apply_mentions -from .newlines import apply as apply_newlines -from .role_mentions import apply as apply_role_mentions diff --git a/bot/rules/attachments.py b/bot/rules/attachments.py deleted file mode 100644 index 8903c385c..000000000 --- a/bot/rules/attachments.py +++ /dev/null @@ -1,26 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total attachments exceeding the limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if ( - msg.author == last_message.author - and len(msg.attachments) > 0 - ) - ) - total_recent_attachments = sum(len(msg.attachments) for msg in relevant_messages) - - if total_recent_attachments > config['max']: - return ( - f"sent {total_recent_attachments} attachments in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/burst.py b/bot/rules/burst.py deleted file mode 100644 index 25c5a2f33..000000000 --- a/bot/rules/burst.py +++ /dev/null @@ -1,23 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects repeated messages sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - total_relevant = len(relevant_messages) - - if total_relevant > config['max']: - return ( - f"sent {total_relevant} messages in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/burst_shared.py b/bot/rules/burst_shared.py deleted file mode 100644 index bbe9271b3..000000000 --- a/bot/rules/burst_shared.py +++ /dev/null @@ -1,18 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects repeated messages sent by multiple users.""" - total_recent = len(recent_messages) - - if total_recent > config['max']: - return ( - f"sent {total_recent} messages in {config['interval']}s", - set(msg.author for msg in recent_messages), - recent_messages - ) - return None diff --git a/bot/rules/chars.py b/bot/rules/chars.py deleted file mode 100644 index 1f587422c..000000000 --- a/bot/rules/chars.py +++ /dev/null @@ -1,24 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total message char count exceeding the limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - - total_recent_chars = sum(len(msg.content) for msg in relevant_messages) - - if total_recent_chars > config['max']: - return ( - f"sent {total_recent_chars} characters in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/discord_emojis.py b/bot/rules/discord_emojis.py deleted file mode 100644 index d979ac5e7..000000000 --- a/bot/rules/discord_emojis.py +++ /dev/null @@ -1,34 +0,0 @@ -import re -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message -from emoji import demojize - -DISCORD_EMOJI_RE = re.compile(r"<:\w+:\d+>|:\w+:") -CODE_BLOCK_RE = re.compile(r"```.*?```", flags=re.DOTALL) - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total Discord emojis exceeding the limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - - # Get rid of code blocks in the message before searching for emojis. - # Convert Unicode emojis to :emoji: format to get their count. - total_emojis = sum( - len(DISCORD_EMOJI_RE.findall(demojize(CODE_BLOCK_RE.sub("", msg.content)))) - for msg in relevant_messages - ) - - if total_emojis > config['max']: - return ( - f"sent {total_emojis} emojis in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/duplicates.py b/bot/rules/duplicates.py deleted file mode 100644 index 8e4fbc12d..000000000 --- a/bot/rules/duplicates.py +++ /dev/null @@ -1,28 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects duplicated messages sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if ( - msg.author == last_message.author - and msg.content == last_message.content - and msg.content - ) - ) - - total_duplicated = len(relevant_messages) - - if total_duplicated > config['max']: - return ( - f"sent {total_duplicated} duplicated messages in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/links.py b/bot/rules/links.py deleted file mode 100644 index c46b783c5..000000000 --- a/bot/rules/links.py +++ /dev/null @@ -1,36 +0,0 @@ -import re -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - -LINK_RE = re.compile(r"(https?://[^\s]+)") - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total links exceeding the limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - total_links = 0 - messages_with_links = 0 - - for msg in relevant_messages: - total_matches = len(LINK_RE.findall(msg.content)) - if total_matches: - messages_with_links += 1 - total_links += total_matches - - # Only apply the filter if we found more than one message with - # links to prevent wrongfully firing the rule on users posting - # e.g. an installation log of pip packages from GitHub. - if total_links > config['max'] and messages_with_links > 1: - return ( - f"sent {total_links} links in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/rules/newlines.py b/bot/rules/newlines.py deleted file mode 100644 index 4e66e1359..000000000 --- a/bot/rules/newlines.py +++ /dev/null @@ -1,45 +0,0 @@ -import re -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total newlines exceeding the set limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - - # Identify groups of newline characters and get group & total counts - exp = r"(\n+)" - newline_counts = [] - for msg in relevant_messages: - newline_counts += [len(group) for group in re.findall(exp, msg.content)] - total_recent_newlines = sum(newline_counts) - - # Get maximum newline group size - if newline_counts: - max_newline_group = max(newline_counts) - else: - # If no newlines are found, newline_counts will be an empty list, which will error out max() - max_newline_group = 0 - - # Check first for total newlines, if this passes then check for large groupings - if total_recent_newlines > config['max']: - return ( - f"sent {total_recent_newlines} newlines in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - elif max_newline_group > config['max_consecutive']: - return ( - f"sent {max_newline_group} consecutive newlines in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - - return None diff --git a/bot/rules/role_mentions.py b/bot/rules/role_mentions.py deleted file mode 100644 index 0649540b6..000000000 --- a/bot/rules/role_mentions.py +++ /dev/null @@ -1,24 +0,0 @@ -from typing import Dict, Iterable, List, Optional, Tuple - -from discord import Member, Message - - -async def apply( - last_message: Message, recent_messages: List[Message], config: Dict[str, int] -) -> Optional[Tuple[str, Iterable[Member], Iterable[Message]]]: - """Detects total role mentions exceeding the limit sent by a single user.""" - relevant_messages = tuple( - msg - for msg in recent_messages - if msg.author == last_message.author - ) - - total_recent_mentions = sum(len(msg.role_mentions) for msg in relevant_messages) - - if total_recent_mentions > config['max']: - return ( - f"sent {total_recent_mentions} role mentions in {config['interval']}s", - (last_message.author,), - relevant_messages - ) - return None diff --git a/bot/utils/message_cache.py b/bot/utils/message_cache.py index f68d280c9..5deb2376b 100644 --- a/bot/utils/message_cache.py +++ b/bot/utils/message_cache.py @@ -31,20 +31,23 @@ class MessageCache: self._start = 0 self._end = 0 - self._messages: list[t.Optional[Message]] = [None] * self.maxlen + self._messages: list[Message | None] = [None] * self.maxlen self._message_id_mapping = {} + self._message_metadata = {} - def append(self, message: Message) -> None: + def append(self, message: Message, *, metadata: dict | None = None) -> None: """Add the received message to the cache, depending on the order of messages defined by `newest_first`.""" if self.newest_first: self._appendleft(message) else: self._appendright(message) + self._message_metadata[message.id] = metadata def _appendright(self, message: Message) -> None: """Add the received message to the end of the cache.""" if self._is_full(): del self._message_id_mapping[self._messages[self._start].id] + del self._message_metadata[self._messages[self._start].id] self._start = (self._start + 1) % self.maxlen self._messages[self._end] = message @@ -56,6 +59,7 @@ class MessageCache: if self._is_full(): self._end = (self._end - 1) % self.maxlen del self._message_id_mapping[self._messages[self._end].id] + del self._message_metadata[self._messages[self._end].id] self._start = (self._start - 1) % self.maxlen self._messages[self._start] = message @@ -69,6 +73,7 @@ class MessageCache: self._end = (self._end - 1) % self.maxlen message = self._messages[self._end] del self._message_id_mapping[message.id] + del self._message_metadata[message.id] self._messages[self._end] = None return message @@ -80,6 +85,7 @@ class MessageCache: message = self._messages[self._start] del self._message_id_mapping[message.id] + del self._message_metadata[message.id] self._messages[self._start] = None self._start = (self._start + 1) % self.maxlen @@ -89,16 +95,21 @@ class MessageCache: """Remove all messages from the cache.""" self._messages = [None] * self.maxlen self._message_id_mapping = {} + self._message_metadata = {} self._start = 0 self._end = 0 - def get_message(self, message_id: int) -> t.Optional[Message]: + def get_message(self, message_id: int) -> Message | None: """Return the message that has the given message ID, if it is cached.""" index = self._message_id_mapping.get(message_id, None) return self._messages[index] if index is not None else None - def update(self, message: Message) -> bool: + def get_message_metadata(self, message_id: int) -> dict | None: + """Return the metadata of the message that has the given message ID, if it is cached.""" + return self._message_metadata.get(message_id, None) + + def update(self, message: Message, *, metadata: dict | None = None) -> bool: """ Update a cached message with new contents. @@ -108,13 +119,15 @@ class MessageCache: if index is None: return False self._messages[index] = message + if metadata is not None: + self._message_metadata[message.id] = metadata return True def __contains__(self, message_id: int) -> bool: """Return True if the cache contains a message with the given ID .""" return message_id in self._message_id_mapping - def __getitem__(self, item: t.Union[int, slice]) -> t.Union[Message, list[Message]]: + def __getitem__(self, item: int | slice) -> Message | list[Message]: """ Return the message(s) in the index or slice provided. diff --git a/bot/utils/messages.py b/bot/utils/messages.py index f6bdceaef..8d765ebfc 100644 --- a/bot/utils/messages.py +++ b/bot/utils/messages.py @@ -1,16 +1,21 @@ import asyncio import random import re +from collections.abc import Iterable +from datetime import datetime, timezone from functools import partial from io import BytesIO from typing import Callable, List, Optional, Sequence, Union import discord +from discord import Message from discord.ext.commands import Context +from pydis_core.site_api import ResponseCodeError from pydis_core.utils import scheduling +from sentry_sdk import add_breadcrumb import bot -from bot.constants import Emojis, MODERATION_ROLES, NEGATIVE_REPLIES +from bot.constants import Emojis, MODERATION_ROLES, NEGATIVE_REPLIES, URLs from bot.log import get_logger log = get_logger(__name__) @@ -241,6 +246,55 @@ async def send_denial(ctx: Context, reason: str) -> discord.Message: return await ctx.send(embed=embed) -def format_user(user: discord.abc.User) -> str: +def format_user(user: discord.User | discord.Member) -> str: """Return a string for `user` which has their mention and ID.""" return f"{user.mention} (`{user.id}`)" + + +def format_channel(channel: discord.abc.Messageable) -> str: + """Return a string for `channel` with its mention, ID, and the parent channel if it is a thread.""" + formatted = f"{channel.mention} ({channel.category}/#{channel}" + if hasattr(channel, "parent"): + formatted += f"/{channel.parent}" + formatted += ")" + return formatted + + +async def upload_log(messages: Iterable[Message], actor_id: int, attachments: dict[int, list[str]] = None) -> str: + """Upload message logs to the database and return a URL to a page for viewing the logs.""" + if attachments is None: + attachments = [] + else: + attachments = [attachments.get(message.id, []) for message in messages] + + deletedmessage_set = [ + { + "id": message.id, + "author": message.author.id, + "channel_id": message.channel.id, + "content": message.content.replace("\0", ""), # Null chars cause 400. + "embeds": [embed.to_dict() for embed in message.embeds], + "attachments": attachment, + } + for message, attachment in zip(messages, attachments) + ] + + try: + response = await bot.instance.api_client.post( + "bot/deleted-messages", + json={ + "actor": actor_id, + "creation": datetime.now(timezone.utc).isoformat(), + "deletedmessage_set": deletedmessage_set, + } + ) + except ResponseCodeError as e: + add_breadcrumb( + category="api_error", + message=str(e), + level="error", + data=deletedmessage_set, + ) + raise + + return f"{URLs.site_logs_view}/{response['id']}" diff --git a/tests/bot/exts/filtering/__init__.py b/tests/bot/exts/filtering/__init__.py new file mode 100644 index 000000000..e69de29bb --- /dev/null +++ b/tests/bot/exts/filtering/__init__.py diff --git a/tests/bot/exts/filtering/test_discord_token_filter.py b/tests/bot/exts/filtering/test_discord_token_filter.py new file mode 100644 index 000000000..ef124e6ff --- /dev/null +++ b/tests/bot/exts/filtering/test_discord_token_filter.py @@ -0,0 +1,276 @@ +import unittest +from re import Match +from unittest import mock +from unittest.mock import MagicMock, patch + +import arrow + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.unique import discord_token +from bot.exts.filtering._filters.unique.discord_token import DiscordTokenFilter, Token +from tests.helpers import MockBot, MockMember, MockMessage, MockTextChannel, autospec + + +class DiscordTokenFilterTests(unittest.IsolatedAsyncioTestCase): + """Tests the DiscordTokenFilter class.""" + + def setUp(self): + """Adds the filter, a bot, and a message to the instance for usage in tests.""" + now = arrow.utcnow().timestamp() + self.filter = DiscordTokenFilter({ + "id": 1, + "content": "discord_token", + "description": None, + "settings": {}, + "additional_field": "{}", # noqa: P103 + "created_at": now, + "updated_at": now + }) + + self.msg = MockMessage(id=555, content="hello world") + self.msg.author.__str__ = MagicMock(return_value=self.msg.author.name) + + member = MockMember(id=123) + channel = MockTextChannel(id=345) + self.ctx = FilterContext(Event.MESSAGE, member, channel, "", self.msg) + + def test_extract_user_id_valid(self): + """Should consider user IDs valid if they decode into an integer ID.""" + id_pairs = ( + ("NDcyMjY1OTQzMDYyNDEzMzMy", 472265943062413332), + ("NDc1MDczNjI5Mzk5NTQ3OTA0", 475073629399547904), + ("NDY3MjIzMjMwNjUwNzc3NjQx", 467223230650777641), + ) + + for token_id, user_id in id_pairs: + with self.subTest(token_id=token_id): + result = DiscordTokenFilter.extract_user_id(token_id) + self.assertEqual(result, user_id) + + def test_extract_user_id_invalid(self): + """Should consider non-digit and non-ASCII IDs invalid.""" + ids = ( + ("SGVsbG8gd29ybGQ", "non-digit ASCII"), + ("0J_RgNC40LLQtdGCINC80LjRgA", "cyrillic text"), + ("4pO14p6L4p6C4pG34p264pGl8J-EiOKSj-KCieKBsA", "Unicode digits"), + ("4oaA4oaB4oWh4oWi4Lyz4Lyq4Lyr4LG9", "Unicode numerals"), + ("8J2fjvCdn5nwnZ-k8J2fr_Cdn7rgravvvJngr6c", "Unicode decimals"), + ("{hello}[world]&(bye!)", "ASCII invalid Base64"), + ("Þíß-ï§-ňøẗ-våłìÐ", "Unicode invalid Base64"), + ) + + for user_id, msg in ids: + with self.subTest(msg=msg): + result = DiscordTokenFilter.extract_user_id(user_id) + self.assertIsNone(result) + + def test_is_valid_timestamp_valid(self): + """Should consider timestamps valid if they're greater than the Discord epoch.""" + timestamps = ( + "XsyRkw", + "Xrim9Q", + "XsyR-w", + "XsySD_", + "Dn9r_A", + ) + + for timestamp in timestamps: + with self.subTest(timestamp=timestamp): + result = DiscordTokenFilter.is_valid_timestamp(timestamp) + self.assertTrue(result) + + def test_is_valid_timestamp_invalid(self): + """Should consider timestamps invalid if they're before Discord epoch or can't be parsed.""" + timestamps = ( + ("B4Yffw", "DISCORD_EPOCH - TOKEN_EPOCH - 1"), + ("ew", "123"), + ("AoIKgA", "42076800"), + ("{hello}[world]&(bye!)", "ASCII invalid Base64"), + ("Þíß-ï§-ňøẗ-våłìÐ", "Unicode invalid Base64"), + ) + + for timestamp, msg in timestamps: + with self.subTest(msg=msg): + result = DiscordTokenFilter.is_valid_timestamp(timestamp) + self.assertFalse(result) + + def test_is_valid_hmac_valid(self): + """Should consider an HMAC valid if it has at least 3 unique characters.""" + valid_hmacs = ( + "VXmErH7j511turNpfURmb0rVNm8", + "Ysnu2wacjaKs7qnoo46S8Dm2us8", + "sJf6omBPORBPju3WJEIAcwW9Zds", + "s45jqDV_Iisn-symw0yDRrk_jf4", + ) + + for hmac in valid_hmacs: + with self.subTest(msg=hmac): + result = DiscordTokenFilter.is_maybe_valid_hmac(hmac) + self.assertTrue(result) + + def test_is_invalid_hmac_invalid(self): + """Should consider an HMAC invalid if has fewer than 3 unique characters.""" + invalid_hmacs = ( + ("xxxxxxxxxxxxxxxxxx", "Single character"), + ("XxXxXxXxXxXxXxXxXx", "Single character alternating case"), + ("ASFasfASFasfASFASsf", "Three characters alternating-case"), + ("asdasdasdasdasdasdasd", "Three characters one case"), + ) + + for hmac, msg in invalid_hmacs: + with self.subTest(msg=msg): + result = DiscordTokenFilter.is_maybe_valid_hmac(hmac) + self.assertFalse(result) + + async def test_no_trigger_when_no_token(self): + """False should be returned if the message doesn't contain a Discord token.""" + return_value = await self.filter.triggered_on(self.ctx) + + self.assertFalse(return_value) + + @autospec(DiscordTokenFilter, "extract_user_id", "is_valid_timestamp", "is_maybe_valid_hmac") + @autospec("bot.exts.filtering._filters.unique.discord_token", "Token") + @autospec("bot.exts.filtering._filters.unique.discord_token", "TOKEN_RE") + def test_find_token_valid_match( + self, + token_re, + token_cls, + extract_user_id, + is_valid_timestamp, + is_maybe_valid_hmac, + ): + """The first match with a valid user ID, timestamp, and HMAC should be returned as a `Token`.""" + matches = [ + mock.create_autospec(Match, spec_set=True, instance=True), + mock.create_autospec(Match, spec_set=True, instance=True), + ] + tokens = [ + mock.create_autospec(Token, spec_set=True, instance=True), + mock.create_autospec(Token, spec_set=True, instance=True), + ] + + token_re.finditer.return_value = matches + token_cls.side_effect = tokens + extract_user_id.side_effect = (None, True) # The 1st match will be invalid, 2nd one valid. + is_valid_timestamp.return_value = True + is_maybe_valid_hmac.return_value = True + + return_value = DiscordTokenFilter.find_token_in_message(self.msg) + + self.assertEqual(tokens[1], return_value) + + @autospec(DiscordTokenFilter, "extract_user_id", "is_valid_timestamp", "is_maybe_valid_hmac") + @autospec("bot.exts.filtering._filters.unique.discord_token", "Token") + @autospec("bot.exts.filtering._filters.unique.discord_token", "TOKEN_RE") + def test_find_token_invalid_matches( + self, + token_re, + token_cls, + extract_user_id, + is_valid_timestamp, + is_maybe_valid_hmac, + ): + """None should be returned if no matches have valid user IDs, HMACs, and timestamps.""" + token_re.finditer.return_value = [mock.create_autospec(Match, spec_set=True, instance=True)] + token_cls.return_value = mock.create_autospec(Token, spec_set=True, instance=True) + extract_user_id.return_value = None + is_valid_timestamp.return_value = False + is_maybe_valid_hmac.return_value = False + + return_value = DiscordTokenFilter.find_token_in_message(self.msg) + + self.assertIsNone(return_value) + + def test_regex_invalid_tokens(self): + """Messages without anything looking like a token are not matched.""" + tokens = ( + "", + "lemon wins", + "..", + "x.y", + "x.y.", + ".y.z", + ".y.", + "..z", + "x..z", + " . . ", + "\n.\n.\n", + "hellö.world.bye", + "base64.nötbåse64.morebase64", + "19jd3J.dfkm3d.€víł§tüff", + ) + + for token in tokens: + with self.subTest(token=token): + results = discord_token.TOKEN_RE.findall(token) + self.assertEqual(len(results), 0) + + def test_regex_valid_tokens(self): + """Messages that look like tokens should be matched.""" + # Don't worry, these tokens have been invalidated. + tokens = ( + "NDcyMjY1OTQzMDYy_DEzMz-y.XsyRkw.VXmErH7j511turNpfURmb0rVNm8", + "NDcyMjY1OTQzMDYyNDEzMzMy.Xrim9Q.Ysnu2wacjaKs7qnoo46S8Dm2us8", + "NDc1MDczNjI5Mzk5NTQ3OTA0.XsyR-w.sJf6omBPORBPju3WJEIAcwW9Zds", + "NDY3MjIzMjMwNjUwNzc3NjQx.XsySD_.s45jqDV_Iisn-symw0yDRrk_jf4", + ) + + for token in tokens: + with self.subTest(token=token): + results = discord_token.TOKEN_RE.fullmatch(token) + self.assertIsNotNone(results, f"{token} was not matched by the regex") + + def test_regex_matches_multiple_valid(self): + """Should support multiple matches in the middle of a string.""" + token_1 = "NDY3MjIzMjMwNjUwNzc3NjQx.XsyWGg.uFNEQPCc4ePwGh7egG8UicQssz8" + token_2 = "NDcyMjY1OTQzMDYyNDEzMzMy.XsyWMw.l8XPnDqb0lp-EiQ2g_0xVFT1pyc" + message = f"garbage {token_1} hello {token_2} world" + + results = discord_token.TOKEN_RE.finditer(message) + results = [match[0] for match in results] + self.assertCountEqual((token_1, token_2), results) + + @autospec("bot.exts.filtering._filters.unique.discord_token", "LOG_MESSAGE") + def test_format_log_message(self, log_message): + """Should correctly format the log message with info from the message and token.""" + token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") + log_message.format.return_value = "Howdy" + + return_value = DiscordTokenFilter.format_log_message(self.msg.author, self.msg.channel, token) + + self.assertEqual(return_value, log_message.format.return_value) + + @patch("bot.instance", MockBot()) + @autospec("bot.exts.filtering._filters.unique.discord_token", "UNKNOWN_USER_LOG_MESSAGE") + @autospec("bot.exts.filtering._filters.unique.discord_token", "get_or_fetch_member") + async def test_format_userid_log_message_unknown(self, get_or_fetch_member, unknown_user_log_message): + """Should correctly format the user ID portion when the actual user it belongs to is unknown.""" + token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") + unknown_user_log_message.format.return_value = " Partner" + get_or_fetch_member.return_value = None + + return_value = await DiscordTokenFilter.format_userid_log_message(token) + + self.assertEqual(return_value, (unknown_user_log_message.format.return_value, False)) + + @patch("bot.instance", MockBot()) + @autospec("bot.exts.filtering._filters.unique.discord_token", "KNOWN_USER_LOG_MESSAGE") + async def test_format_userid_log_message_bot(self, known_user_log_message): + """Should correctly format the user ID portion when the ID belongs to a known bot.""" + token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") + known_user_log_message.format.return_value = " Partner" + + return_value = await DiscordTokenFilter.format_userid_log_message(token) + + self.assertEqual(return_value, (known_user_log_message.format.return_value, True)) + + @patch("bot.instance", MockBot()) + @autospec("bot.exts.filtering._filters.unique.discord_token", "KNOWN_USER_LOG_MESSAGE") + async def test_format_log_message_user_token_user(self, user_token_message): + """Should correctly format the user ID portion when the ID belongs to a known user.""" + token = Token("NDY3MjIzMjMwNjUwNzc3NjQx", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") + user_token_message.format.return_value = "Partner" + + return_value = await DiscordTokenFilter.format_userid_log_message(token) + + self.assertEqual(return_value, (user_token_message.format.return_value, True)) diff --git a/tests/bot/exts/filtering/test_extension_filter.py b/tests/bot/exts/filtering/test_extension_filter.py new file mode 100644 index 000000000..0ad41116d --- /dev/null +++ b/tests/bot/exts/filtering/test_extension_filter.py @@ -0,0 +1,139 @@ +import unittest +from unittest.mock import MagicMock, patch + +import arrow + +from bot.constants import Channels +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filter_lists import extension +from bot.exts.filtering._filter_lists.extension import ExtensionsList +from bot.exts.filtering._filter_lists.filter_list import ListType +from tests.helpers import MockAttachment, MockBot, MockMember, MockMessage, MockTextChannel + +BOT = MockBot() + + +class ExtensionsListTests(unittest.IsolatedAsyncioTestCase): + """Test the ExtensionsList class.""" + + def setUp(self): + """Sets up fresh objects for each test.""" + self.filter_list = ExtensionsList(MagicMock()) + now = arrow.utcnow().timestamp() + filters = [] + self.whitelist = [".first", ".second", ".third"] + for i, filter_content in enumerate(self.whitelist, start=1): + filters.append({ + "id": i, "content": filter_content, "description": None, "settings": {}, + "additional_field": "{}", "created_at": now, "updated_at": now # noqa: P103 + }) + self.filter_list.add_list({ + "id": 1, + "list_type": 1, + "created_at": now, + "updated_at": now, + "settings": {}, + "filters": filters + }) + + self.message = MockMessage() + member = MockMember(id=123) + channel = MockTextChannel(id=345) + self.ctx = FilterContext(Event.MESSAGE, member, channel, "", self.message) + + @patch("bot.instance", BOT) + async def test_message_with_allowed_attachment(self): + """Messages with allowed extensions should trigger the whitelist and result in no actions or messages.""" + attachment = MockAttachment(filename="python.first") + self.message.attachments = [attachment] + + result = await self.filter_list.actions_for(self.ctx) + + self.assertEqual(result, (None, [], {ListType.ALLOW: [self.filter_list[ListType.ALLOW].filters[1]]})) + + @patch("bot.instance", BOT) + async def test_message_without_attachment(self): + """Messages without attachments should return no triggers, messages, or actions.""" + result = await self.filter_list.actions_for(self.ctx) + + self.assertEqual(result, (None, [], {})) + + @patch("bot.instance", BOT) + async def test_message_with_illegal_extension(self): + """A message with an illegal extension shouldn't trigger the whitelist, and return some action and message.""" + attachment = MockAttachment(filename="python.disallowed") + self.message.attachments = [attachment] + + result = await self.filter_list.actions_for(self.ctx) + + self.assertEqual(result, ({}, ["`.disallowed`"], {ListType.ALLOW: []})) + + @patch("bot.instance", BOT) + async def test_python_file_redirect_embed_description(self): + """A message containing a .py file should result in an embed redirecting the user to our paste site.""" + attachment = MockAttachment(filename="python.py") + self.message.attachments = [attachment] + + await self.filter_list.actions_for(self.ctx) + + self.assertEqual(self.ctx.dm_embed, extension.PY_EMBED_DESCRIPTION) + + @patch("bot.instance", BOT) + async def test_txt_file_redirect_embed_description(self): + """A message containing a .txt/.json/.csv file should result in the correct embed.""" + test_values = ( + ("text", ".txt"), + ("json", ".json"), + ("csv", ".csv"), + ) + + for file_name, disallowed_extension in test_values: + with self.subTest(file_name=file_name, disallowed_extension=disallowed_extension): + + attachment = MockAttachment(filename=f"{file_name}{disallowed_extension}") + self.message.attachments = [attachment] + + await self.filter_list.actions_for(self.ctx) + + self.assertEqual( + self.ctx.dm_embed, + extension.TXT_EMBED_DESCRIPTION.format( + blocked_extension=disallowed_extension, + ) + ) + + @patch("bot.instance", BOT) + async def test_other_disallowed_extension_embed_description(self): + """Test the description for a non .py/.txt/.json/.csv disallowed extension.""" + attachment = MockAttachment(filename="python.disallowed") + self.message.attachments = [attachment] + + await self.filter_list.actions_for(self.ctx) + meta_channel = BOT.get_channel(Channels.meta) + + self.assertEqual( + self.ctx.dm_embed, + extension.DISALLOWED_EMBED_DESCRIPTION.format( + joined_whitelist=", ".join(self.whitelist), + blocked_extensions_str=".disallowed", + meta_channel_mention=meta_channel.mention + ) + ) + + @patch("bot.instance", BOT) + async def test_get_disallowed_extensions(self): + """The return value should include all non-whitelisted extensions.""" + test_values = ( + ([], []), + (self.whitelist, []), + ([".first"], []), + ([".first", ".disallowed"], ["`.disallowed`"]), + ([".disallowed"], ["`.disallowed`"]), + ([".disallowed", ".illegal"], ["`.disallowed`", "`.illegal`"]), + ) + + for extensions, expected_disallowed_extensions in test_values: + with self.subTest(extensions=extensions, expected_disallowed_extensions=expected_disallowed_extensions): + self.message.attachments = [MockAttachment(filename=f"filename{ext}") for ext in extensions] + result = await self.filter_list.actions_for(self.ctx) + self.assertCountEqual(result[1], expected_disallowed_extensions) diff --git a/tests/bot/exts/filtering/test_settings.py b/tests/bot/exts/filtering/test_settings.py new file mode 100644 index 000000000..5a289c1cf --- /dev/null +++ b/tests/bot/exts/filtering/test_settings.py @@ -0,0 +1,20 @@ +import unittest + +import bot.exts.filtering._settings +from bot.exts.filtering._settings import create_settings + + +class FilterTests(unittest.TestCase): + """Test functionality of the Settings class and its subclasses.""" + + def test_create_settings_returns_none_for_empty_data(self): + """`create_settings` should return a tuple of two Nones when passed an empty dict.""" + result = create_settings({}) + + self.assertEqual(result, (None, None)) + + def test_unrecognized_entry_makes_a_warning(self): + """When an unrecognized entry name is passed to `create_settings`, it should be added to `_already_warned`.""" + create_settings({"abcd": {}}) + + self.assertIn("abcd", bot.exts.filtering._settings._already_warned) diff --git a/tests/bot/exts/filtering/test_settings_entries.py b/tests/bot/exts/filtering/test_settings_entries.py new file mode 100644 index 000000000..5a1eb6fe6 --- /dev/null +++ b/tests/bot/exts/filtering/test_settings_entries.py @@ -0,0 +1,216 @@ +import unittest + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._settings_types.actions.infraction_and_notification import Infraction, InfractionAndNotification +from bot.exts.filtering._settings_types.validations.bypass_roles import RoleBypass +from bot.exts.filtering._settings_types.validations.channel_scope import ChannelScope +from bot.exts.filtering._settings_types.validations.filter_dm import FilterDM +from tests.helpers import MockCategoryChannel, MockDMChannel, MockMember, MockMessage, MockRole, MockTextChannel + + +class FilterTests(unittest.TestCase): + """Test functionality of the Settings class and its subclasses.""" + + def setUp(self) -> None: + member = MockMember(id=123) + channel = MockTextChannel(id=345) + message = MockMessage(author=member, channel=channel) + self.ctx = FilterContext(Event.MESSAGE, member, channel, "", message) + + def test_role_bypass_is_off_for_user_without_roles(self): + """The role bypass should trigger when a user has no roles.""" + member = MockMember() + self.ctx.author = member + bypass_entry = RoleBypass(bypass_roles=["123"]) + + result = bypass_entry.triggers_on(self.ctx) + + self.assertTrue(result) + + def test_role_bypass_is_on_for_a_user_with_the_right_role(self): + """The role bypass should not trigger when the user has one of its roles.""" + cases = ( + ([123], ["123"]), + ([123, 234], ["123"]), + ([123], ["123", "234"]), + ([123, 234], ["123", "234"]) + ) + + for user_role_ids, bypasses in cases: + with self.subTest(user_role_ids=user_role_ids, bypasses=bypasses): + user_roles = [MockRole(id=role_id) for role_id in user_role_ids] + member = MockMember(roles=user_roles) + self.ctx.author = member + bypass_entry = RoleBypass(bypass_roles=bypasses) + + result = bypass_entry.triggers_on(self.ctx) + + self.assertFalse(result) + + def test_context_doesnt_trigger_for_empty_channel_scope(self): + """A filter is enabled for all channels by default.""" + channel = MockTextChannel() + scope = ChannelScope( + disabled_channels=None, disabled_categories=None, enabled_channels=None, enabled_categories=None + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertTrue(result) + + def test_context_doesnt_trigger_for_disabled_channel(self): + """A filter shouldn't trigger if it's been disabled in the channel.""" + channel = MockTextChannel(id=123) + scope = ChannelScope( + disabled_channels=["123"], disabled_categories=None, enabled_channels=None, enabled_categories=None + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertFalse(result) + + def test_context_doesnt_trigger_in_disabled_category(self): + """A filter shouldn't trigger if it's been disabled in the category.""" + channel = MockTextChannel(category=MockCategoryChannel(id=456)) + scope = ChannelScope( + disabled_channels=None, disabled_categories=["456"], enabled_channels=None, enabled_categories=None + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertFalse(result) + + def test_context_triggers_in_enabled_channel_in_disabled_category(self): + """A filter should trigger in an enabled channel even if it's been disabled in the category.""" + channel = MockTextChannel(id=123, category=MockCategoryChannel(id=234)) + scope = ChannelScope( + disabled_channels=None, disabled_categories=["234"], enabled_channels=["123"], enabled_categories=None + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertTrue(result) + + def test_context_triggers_inside_enabled_category(self): + """A filter shouldn't trigger outside enabled categories, if there are any.""" + channel = MockTextChannel(id=123, category=MockCategoryChannel(id=234)) + scope = ChannelScope( + disabled_channels=None, disabled_categories=None, enabled_channels=None, enabled_categories=["234"] + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertTrue(result) + + def test_context_doesnt_trigger_outside_enabled_category(self): + """A filter shouldn't trigger outside enabled categories, if there are any.""" + channel = MockTextChannel(id=123, category=MockCategoryChannel(id=234)) + scope = ChannelScope( + disabled_channels=None, disabled_categories=None, enabled_channels=None, enabled_categories=["789"] + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertFalse(result) + + def test_context_doesnt_trigger_inside_disabled_channel_in_enabled_category(self): + """A filter shouldn't trigger outside enabled categories, if there are any.""" + channel = MockTextChannel(id=123, category=MockCategoryChannel(id=234)) + scope = ChannelScope( + disabled_channels=["123"], disabled_categories=None, enabled_channels=None, enabled_categories=["234"] + ) + self.ctx.channel = channel + + result = scope.triggers_on(self.ctx) + + self.assertFalse(result) + + def test_filtering_dms_when_necessary(self): + """A filter correctly ignores or triggers in a channel depending on the value of FilterDM.""" + cases = ( + (True, MockDMChannel(), True), + (False, MockDMChannel(), False), + (True, MockTextChannel(), True), + (False, MockTextChannel(), True) + ) + + for apply_in_dms, channel, expected in cases: + with self.subTest(apply_in_dms=apply_in_dms, channel=channel): + filter_dms = FilterDM(filter_dm=apply_in_dms) + self.ctx.channel = channel + + result = filter_dms.triggers_on(self.ctx) + + self.assertEqual(expected, result) + + def test_infraction_merge_of_same_infraction_type(self): + """When both infractions are of the same type, the one with the longer duration wins.""" + infraction1 = InfractionAndNotification( + infraction_type="MUTE", + infraction_reason="hi", + infraction_duration=10, + dm_content="how", + dm_embed="what is", + infraction_channel=0 + ) + infraction2 = InfractionAndNotification( + infraction_type="MUTE", + infraction_reason="there", + infraction_duration=20, + dm_content="are you", + dm_embed="your name", + infraction_channel=0 + ) + + result = infraction1 | infraction2 + + self.assertDictEqual( + result.dict(), + { + "infraction_type": Infraction.MUTE, + "infraction_reason": "there", + "infraction_duration": 20.0, + "dm_content": "are you", + "dm_embed": "your name", + "infraction_channel": 0 + } + ) + + def test_infraction_merge_of_different_infraction_types(self): + """If there are two different infraction types, the one higher up the hierarchy should be picked.""" + infraction1 = InfractionAndNotification( + infraction_type="MUTE", + infraction_reason="hi", + infraction_duration=20, + dm_content="", + dm_embed="", + infraction_channel=0 + ) + infraction2 = InfractionAndNotification( + infraction_type="BAN", + infraction_reason="", + infraction_duration=10, + dm_content="there", + dm_embed="", + infraction_channel=0 + ) + + result = infraction1 | infraction2 + + self.assertDictEqual( + result.dict(), + { + "infraction_type": Infraction.BAN, + "infraction_reason": "", + "infraction_duration": 10.0, + "dm_content": "there", + "dm_embed": "", + "infraction_channel": 0 + } + ) diff --git a/tests/bot/exts/filtering/test_token_filter.py b/tests/bot/exts/filtering/test_token_filter.py new file mode 100644 index 000000000..0dfc8ae9f --- /dev/null +++ b/tests/bot/exts/filtering/test_token_filter.py @@ -0,0 +1,49 @@ +import unittest + +import arrow + +from bot.exts.filtering._filter_context import Event, FilterContext +from bot.exts.filtering._filters.token import TokenFilter +from tests.helpers import MockMember, MockMessage, MockTextChannel + + +class TokenFilterTests(unittest.IsolatedAsyncioTestCase): + """Test functionality of the token filter.""" + + def setUp(self) -> None: + member = MockMember(id=123) + channel = MockTextChannel(id=345) + message = MockMessage(author=member, channel=channel) + self.ctx = FilterContext(Event.MESSAGE, member, channel, "", message) + + async def test_token_filter_triggers(self): + """The filter should evaluate to True only if its token is found in the context content.""" + test_cases = ( + (r"hi", "oh hi there", True), + (r"hi", "goodbye", False), + (r"bla\d{2,4}", "bla18", True), + (r"bla\d{2,4}", "bla1", False), + # See advisory https://github.com/python-discord/bot/security/advisories/GHSA-j8c3-8x46-8pp6 + (r"TOKEN", "https://google.com TOKEN", True), + (r"TOKEN", "https://google.com something else", False) + ) + now = arrow.utcnow().timestamp() + + for pattern, content, expected in test_cases: + with self.subTest( + pattern=pattern, + content=content, + expected=expected, + ): + filter_ = TokenFilter({ + "id": 1, + "content": pattern, + "description": None, + "settings": {}, + "additional_field": "{}", # noqa: P103 + "created_at": now, + "updated_at": now + }) + self.ctx.content = content + result = await filter_.triggered_on(self.ctx) + self.assertEqual(result, expected) diff --git a/tests/bot/exts/filters/test_antimalware.py b/tests/bot/exts/filters/test_antimalware.py deleted file mode 100644 index 7282334e2..000000000 --- a/tests/bot/exts/filters/test_antimalware.py +++ /dev/null @@ -1,202 +0,0 @@ -import unittest -from unittest.mock import AsyncMock, Mock - -from discord import NotFound - -from bot.constants import Channels, STAFF_ROLES -from bot.exts.filters import antimalware -from tests.helpers import MockAttachment, MockBot, MockMessage, MockRole - - -class AntiMalwareCogTests(unittest.IsolatedAsyncioTestCase): - """Test the AntiMalware cog.""" - - def setUp(self): - """Sets up fresh objects for each test.""" - self.bot = MockBot() - self.bot.filter_list_cache = { - "FILE_FORMAT.True": { - ".first": {}, - ".second": {}, - ".third": {}, - } - } - self.cog = antimalware.AntiMalware(self.bot) - self.message = MockMessage() - self.message.webhook_id = None - self.message.author.bot = None - self.whitelist = [".first", ".second", ".third"] - - async def test_message_with_allowed_attachment(self): - """Messages with allowed extensions should not be deleted""" - attachment = MockAttachment(filename="python.first") - self.message.attachments = [attachment] - - await self.cog.on_message(self.message) - self.message.delete.assert_not_called() - - async def test_message_without_attachment(self): - """Messages without attachments should result in no action.""" - await self.cog.on_message(self.message) - self.message.delete.assert_not_called() - - async def test_direct_message_with_attachment(self): - """Direct messages should have no action taken.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - self.message.guild = None - - await self.cog.on_message(self.message) - - self.message.delete.assert_not_called() - - async def test_webhook_message_with_illegal_extension(self): - """A webhook message containing an illegal extension should be ignored.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.webhook_id = 697140105563078727 - self.message.attachments = [attachment] - - await self.cog.on_message(self.message) - - self.message.delete.assert_not_called() - - async def test_bot_message_with_illegal_extension(self): - """A bot message containing an illegal extension should be ignored.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.author.bot = 409107086526644234 - self.message.attachments = [attachment] - - await self.cog.on_message(self.message) - - self.message.delete.assert_not_called() - - async def test_message_with_illegal_extension_gets_deleted(self): - """A message containing an illegal extension should send an embed.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - - await self.cog.on_message(self.message) - - self.message.delete.assert_called_once() - - async def test_message_send_by_staff(self): - """A message send by a member of staff should be ignored.""" - staff_role = MockRole(id=STAFF_ROLES[0]) - self.message.author.roles.append(staff_role) - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - - await self.cog.on_message(self.message) - - self.message.delete.assert_not_called() - - async def test_python_file_redirect_embed_description(self): - """A message containing a .py file should result in an embed redirecting the user to our paste site""" - attachment = MockAttachment(filename="python.py") - self.message.attachments = [attachment] - self.message.channel.send = AsyncMock() - - await self.cog.on_message(self.message) - self.message.channel.send.assert_called_once() - args, kwargs = self.message.channel.send.call_args - embed = kwargs.pop("embed") - - self.assertEqual(embed.description, antimalware.PY_EMBED_DESCRIPTION) - - async def test_txt_file_redirect_embed_description(self): - """A message containing a .txt/.json/.csv file should result in the correct embed.""" - test_values = ( - ("text", ".txt"), - ("json", ".json"), - ("csv", ".csv"), - ) - - for file_name, disallowed_extension in test_values: - with self.subTest(file_name=file_name, disallowed_extension=disallowed_extension): - - attachment = MockAttachment(filename=f"{file_name}{disallowed_extension}") - self.message.attachments = [attachment] - self.message.channel.send = AsyncMock() - antimalware.TXT_EMBED_DESCRIPTION = Mock() - antimalware.TXT_EMBED_DESCRIPTION.format.return_value = "test" - - await self.cog.on_message(self.message) - self.message.channel.send.assert_called_once() - args, kwargs = self.message.channel.send.call_args - embed = kwargs.pop("embed") - cmd_channel = self.bot.get_channel(Channels.bot_commands) - - self.assertEqual( - embed.description, - antimalware.TXT_EMBED_DESCRIPTION.format.return_value - ) - antimalware.TXT_EMBED_DESCRIPTION.format.assert_called_with( - blocked_extension=disallowed_extension, - cmd_channel_mention=cmd_channel.mention - ) - - async def test_other_disallowed_extension_embed_description(self): - """Test the description for a non .py/.txt/.json/.csv disallowed extension.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - self.message.channel.send = AsyncMock() - antimalware.DISALLOWED_EMBED_DESCRIPTION = Mock() - antimalware.DISALLOWED_EMBED_DESCRIPTION.format.return_value = "test" - - await self.cog.on_message(self.message) - self.message.channel.send.assert_called_once() - args, kwargs = self.message.channel.send.call_args - embed = kwargs.pop("embed") - meta_channel = self.bot.get_channel(Channels.meta) - - self.assertEqual(embed.description, antimalware.DISALLOWED_EMBED_DESCRIPTION.format.return_value) - antimalware.DISALLOWED_EMBED_DESCRIPTION.format.assert_called_with( - joined_whitelist=", ".join(self.whitelist), - blocked_extensions_str=".disallowed", - meta_channel_mention=meta_channel.mention - ) - - async def test_removing_deleted_message_logs(self): - """Removing an already deleted message logs the correct message""" - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - self.message.delete = AsyncMock(side_effect=NotFound(response=Mock(status=""), message="")) - - with self.assertLogs(logger=antimalware.log, level="INFO"): - await self.cog.on_message(self.message) - self.message.delete.assert_called_once() - - async def test_message_with_illegal_attachment_logs(self): - """Deleting a message with an illegal attachment should result in a log.""" - attachment = MockAttachment(filename="python.disallowed") - self.message.attachments = [attachment] - - with self.assertLogs(logger=antimalware.log, level="INFO"): - await self.cog.on_message(self.message) - - async def test_get_disallowed_extensions(self): - """The return value should include all non-whitelisted extensions.""" - test_values = ( - ([], []), - (self.whitelist, []), - ([".first"], []), - ([".first", ".disallowed"], [".disallowed"]), - ([".disallowed"], [".disallowed"]), - ([".disallowed", ".illegal"], [".disallowed", ".illegal"]), - ) - - for extensions, expected_disallowed_extensions in test_values: - with self.subTest(extensions=extensions, expected_disallowed_extensions=expected_disallowed_extensions): - self.message.attachments = [MockAttachment(filename=f"filename{extension}") for extension in extensions] - disallowed_extensions = self.cog._get_disallowed_extensions(self.message) - self.assertCountEqual(disallowed_extensions, expected_disallowed_extensions) - - -class AntiMalwareSetupTests(unittest.IsolatedAsyncioTestCase): - """Tests setup of the `AntiMalware` cog.""" - - async def test_setup(self): - """Setup of the extension should call add_cog.""" - bot = MockBot() - await antimalware.setup(bot) - bot.add_cog.assert_awaited_once() diff --git a/tests/bot/exts/filters/test_antispam.py b/tests/bot/exts/filters/test_antispam.py deleted file mode 100644 index 6a0e4fded..000000000 --- a/tests/bot/exts/filters/test_antispam.py +++ /dev/null @@ -1,35 +0,0 @@ -import unittest - -from bot.exts.filters import antispam - - -class AntispamConfigurationValidationTests(unittest.TestCase): - """Tests validation of the antispam cog configuration.""" - - def test_default_antispam_config_is_valid(self): - """The default antispam configuration is valid.""" - validation_errors = antispam.validate_config() - self.assertEqual(validation_errors, {}) - - def test_unknown_rule_returns_error(self): - """Configuring an unknown rule returns an error.""" - self.assertEqual( - antispam.validate_config({'invalid-rule': {}}), - {'invalid-rule': "`invalid-rule` is not recognized as an antispam rule."} - ) - - def test_missing_keys_returns_error(self): - """Not configuring required keys returns an error.""" - keys = (('interval', 'max'), ('max', 'interval')) - for configured_key, unconfigured_key in keys: - with self.subTest( - configured_key=configured_key, - unconfigured_key=unconfigured_key - ): - config = {'burst': {configured_key: 10}} - error = f"Key `{unconfigured_key}` is required but not set for rule `burst`" - - self.assertEqual( - antispam.validate_config(config), - {'burst': error} - ) diff --git a/tests/bot/exts/filters/test_filtering.py b/tests/bot/exts/filters/test_filtering.py deleted file mode 100644 index e47cf627b..000000000 --- a/tests/bot/exts/filters/test_filtering.py +++ /dev/null @@ -1,40 +0,0 @@ -import unittest -from unittest.mock import patch - -from bot.exts.filters import filtering -from tests.helpers import MockBot, autospec - - -class FilteringCogTests(unittest.IsolatedAsyncioTestCase): - """Tests the `Filtering` cog.""" - - def setUp(self): - """Instantiate the bot and cog.""" - self.bot = MockBot() - with patch("pydis_core.utils.scheduling.create_task", new=lambda task, **_: task.close()): - self.cog = filtering.Filtering(self.bot) - - @autospec(filtering.Filtering, "_get_filterlist_items", pass_mocks=False, return_value=["TOKEN"]) - async def test_token_filter(self): - """Ensure that a filter token is correctly detected in a message.""" - messages = { - "": False, - "no matches": False, - "TOKEN": True, - - # See advisory https://github.com/python-discord/bot/security/advisories/GHSA-j8c3-8x46-8pp6 - "https://google.com TOKEN": True, - "https://google.com something else": False, - } - - for message, match in messages.items(): - with self.subTest(input=message, match=match): - result, _ = await self.cog._has_watch_regex_match(message) - - self.assertEqual( - match, - bool(result), - msg=f"Hit was {'expected' if match else 'not expected'} for this input." - ) - if result: - self.assertEqual("TOKEN", result.group()) diff --git a/tests/bot/exts/filters/test_token_remover.py b/tests/bot/exts/filters/test_token_remover.py deleted file mode 100644 index c1f3762ac..000000000 --- a/tests/bot/exts/filters/test_token_remover.py +++ /dev/null @@ -1,409 +0,0 @@ -import unittest -from re import Match -from unittest import mock -from unittest.mock import MagicMock - -from discord import Colour, NotFound - -from bot import constants -from bot.exts.filters import token_remover -from bot.exts.filters.token_remover import Token, TokenRemover -from bot.exts.moderation.modlog import ModLog -from bot.utils.messages import format_user -from tests.helpers import MockBot, MockMessage, autospec - - -class TokenRemoverTests(unittest.IsolatedAsyncioTestCase): - """Tests the `TokenRemover` cog.""" - - def setUp(self): - """Adds the cog, a bot, and a message to the instance for usage in tests.""" - self.bot = MockBot() - self.cog = TokenRemover(bot=self.bot) - - self.msg = MockMessage(id=555, content="hello world") - self.msg.channel.mention = "#lemonade-stand" - self.msg.guild.get_member.return_value.bot = False - self.msg.guild.get_member.return_value.__str__.return_value = "Woody" - self.msg.author.__str__ = MagicMock(return_value=self.msg.author.name) - self.msg.author.display_avatar.url = "picture-lemon.png" - - def test_extract_user_id_valid(self): - """Should consider user IDs valid if they decode into an integer ID.""" - id_pairs = ( - ("NDcyMjY1OTQzMDYyNDEzMzMy", 472265943062413332), - ("NDc1MDczNjI5Mzk5NTQ3OTA0", 475073629399547904), - ("NDY3MjIzMjMwNjUwNzc3NjQx", 467223230650777641), - ) - - for token_id, user_id in id_pairs: - with self.subTest(token_id=token_id): - result = TokenRemover.extract_user_id(token_id) - self.assertEqual(result, user_id) - - def test_extract_user_id_invalid(self): - """Should consider non-digit and non-ASCII IDs invalid.""" - ids = ( - ("SGVsbG8gd29ybGQ", "non-digit ASCII"), - ("0J_RgNC40LLQtdGCINC80LjRgA", "cyrillic text"), - ("4pO14p6L4p6C4pG34p264pGl8J-EiOKSj-KCieKBsA", "Unicode digits"), - ("4oaA4oaB4oWh4oWi4Lyz4Lyq4Lyr4LG9", "Unicode numerals"), - ("8J2fjvCdn5nwnZ-k8J2fr_Cdn7rgravvvJngr6c", "Unicode decimals"), - ("{hello}[world]&(bye!)", "ASCII invalid Base64"), - ("Þíß-ï§-ňøẗ-våłìÐ", "Unicode invalid Base64"), - ) - - for user_id, msg in ids: - with self.subTest(msg=msg): - result = TokenRemover.extract_user_id(user_id) - self.assertIsNone(result) - - def test_is_valid_timestamp_valid(self): - """Should consider timestamps valid if they're greater than the Discord epoch.""" - timestamps = ( - "XsyRkw", - "Xrim9Q", - "XsyR-w", - "XsySD_", - "Dn9r_A", - ) - - for timestamp in timestamps: - with self.subTest(timestamp=timestamp): - result = TokenRemover.is_valid_timestamp(timestamp) - self.assertTrue(result) - - def test_is_valid_timestamp_invalid(self): - """Should consider timestamps invalid if they're before Discord epoch or can't be parsed.""" - timestamps = ( - ("B4Yffw", "DISCORD_EPOCH - TOKEN_EPOCH - 1"), - ("ew", "123"), - ("AoIKgA", "42076800"), - ("{hello}[world]&(bye!)", "ASCII invalid Base64"), - ("Þíß-ï§-ňøẗ-våłìÐ", "Unicode invalid Base64"), - ) - - for timestamp, msg in timestamps: - with self.subTest(msg=msg): - result = TokenRemover.is_valid_timestamp(timestamp) - self.assertFalse(result) - - def test_is_valid_hmac_valid(self): - """Should consider an HMAC valid if it has at least 3 unique characters.""" - valid_hmacs = ( - "VXmErH7j511turNpfURmb0rVNm8", - "Ysnu2wacjaKs7qnoo46S8Dm2us8", - "sJf6omBPORBPju3WJEIAcwW9Zds", - "s45jqDV_Iisn-symw0yDRrk_jf4", - ) - - for hmac in valid_hmacs: - with self.subTest(msg=hmac): - result = TokenRemover.is_maybe_valid_hmac(hmac) - self.assertTrue(result) - - def test_is_invalid_hmac_invalid(self): - """Should consider an HMAC invalid if has fewer than 3 unique characters.""" - invalid_hmacs = ( - ("xxxxxxxxxxxxxxxxxx", "Single character"), - ("XxXxXxXxXxXxXxXxXx", "Single character alternating case"), - ("ASFasfASFasfASFASsf", "Three characters alternating-case"), - ("asdasdasdasdasdasdasd", "Three characters one case"), - ) - - for hmac, msg in invalid_hmacs: - with self.subTest(msg=msg): - result = TokenRemover.is_maybe_valid_hmac(hmac) - self.assertFalse(result) - - def test_mod_log_property(self): - """The `mod_log` property should ask the bot to return the `ModLog` cog.""" - self.bot.get_cog.return_value = 'lemon' - self.assertEqual(self.cog.mod_log, self.bot.get_cog.return_value) - self.bot.get_cog.assert_called_once_with('ModLog') - - async def test_on_message_edit_uses_on_message(self): - """The edit listener should delegate handling of the message to the normal listener.""" - self.cog.on_message = mock.create_autospec(self.cog.on_message, spec_set=True) - - await self.cog.on_message_edit(MockMessage(), self.msg) - self.cog.on_message.assert_awaited_once_with(self.msg) - - @autospec(TokenRemover, "find_token_in_message", "take_action") - async def test_on_message_takes_action(self, find_token_in_message, take_action): - """Should take action if a valid token is found when a message is sent.""" - cog = TokenRemover(self.bot) - found_token = "foobar" - find_token_in_message.return_value = found_token - - await cog.on_message(self.msg) - - find_token_in_message.assert_called_once_with(self.msg) - take_action.assert_awaited_once_with(cog, self.msg, found_token) - - @autospec(TokenRemover, "find_token_in_message", "take_action") - async def test_on_message_skips_missing_token(self, find_token_in_message, take_action): - """Shouldn't take action if a valid token isn't found when a message is sent.""" - cog = TokenRemover(self.bot) - find_token_in_message.return_value = False - - await cog.on_message(self.msg) - - find_token_in_message.assert_called_once_with(self.msg) - take_action.assert_not_awaited() - - @autospec(TokenRemover, "find_token_in_message") - async def test_on_message_ignores_dms_bots(self, find_token_in_message): - """Shouldn't parse a message if it is a DM or authored by a bot.""" - cog = TokenRemover(self.bot) - dm_msg = MockMessage(guild=None) - bot_msg = MockMessage(author=MagicMock(bot=True)) - - for msg in (dm_msg, bot_msg): - await cog.on_message(msg) - find_token_in_message.assert_not_called() - - @autospec("bot.exts.filters.token_remover", "TOKEN_RE") - def test_find_token_no_matches(self, token_re): - """None should be returned if the regex matches no tokens in a message.""" - token_re.finditer.return_value = () - - return_value = TokenRemover.find_token_in_message(self.msg) - - self.assertIsNone(return_value) - token_re.finditer.assert_called_once_with(self.msg.content) - - @autospec(TokenRemover, "extract_user_id", "is_valid_timestamp", "is_maybe_valid_hmac") - @autospec("bot.exts.filters.token_remover", "Token") - @autospec("bot.exts.filters.token_remover", "TOKEN_RE") - def test_find_token_valid_match( - self, - token_re, - token_cls, - extract_user_id, - is_valid_timestamp, - is_maybe_valid_hmac, - ): - """The first match with a valid user ID, timestamp, and HMAC should be returned as a `Token`.""" - matches = [ - mock.create_autospec(Match, spec_set=True, instance=True), - mock.create_autospec(Match, spec_set=True, instance=True), - ] - tokens = [ - mock.create_autospec(Token, spec_set=True, instance=True), - mock.create_autospec(Token, spec_set=True, instance=True), - ] - - token_re.finditer.return_value = matches - token_cls.side_effect = tokens - extract_user_id.side_effect = (None, True) # The 1st match will be invalid, 2nd one valid. - is_valid_timestamp.return_value = True - is_maybe_valid_hmac.return_value = True - - return_value = TokenRemover.find_token_in_message(self.msg) - - self.assertEqual(tokens[1], return_value) - token_re.finditer.assert_called_once_with(self.msg.content) - - @autospec(TokenRemover, "extract_user_id", "is_valid_timestamp", "is_maybe_valid_hmac") - @autospec("bot.exts.filters.token_remover", "Token") - @autospec("bot.exts.filters.token_remover", "TOKEN_RE") - def test_find_token_invalid_matches( - self, - token_re, - token_cls, - extract_user_id, - is_valid_timestamp, - is_maybe_valid_hmac, - ): - """None should be returned if no matches have valid user IDs, HMACs, and timestamps.""" - token_re.finditer.return_value = [mock.create_autospec(Match, spec_set=True, instance=True)] - token_cls.return_value = mock.create_autospec(Token, spec_set=True, instance=True) - extract_user_id.return_value = None - is_valid_timestamp.return_value = False - is_maybe_valid_hmac.return_value = False - - return_value = TokenRemover.find_token_in_message(self.msg) - - self.assertIsNone(return_value) - token_re.finditer.assert_called_once_with(self.msg.content) - - def test_regex_invalid_tokens(self): - """Messages without anything looking like a token are not matched.""" - tokens = ( - "", - "lemon wins", - "..", - "x.y", - "x.y.", - ".y.z", - ".y.", - "..z", - "x..z", - " . . ", - "\n.\n.\n", - "hellö.world.bye", - "base64.nötbåse64.morebase64", - "19jd3J.dfkm3d.€víł§tüff", - ) - - for token in tokens: - with self.subTest(token=token): - results = token_remover.TOKEN_RE.findall(token) - self.assertEqual(len(results), 0) - - def test_regex_valid_tokens(self): - """Messages that look like tokens should be matched.""" - # Don't worry, these tokens have been invalidated. - tokens = ( - "NDcyMjY1OTQzMDYy_DEzMz-y.XsyRkw.VXmErH7j511turNpfURmb0rVNm8", - "NDcyMjY1OTQzMDYyNDEzMzMy.Xrim9Q.Ysnu2wacjaKs7qnoo46S8Dm2us8", - "NDc1MDczNjI5Mzk5NTQ3OTA0.XsyR-w.sJf6omBPORBPju3WJEIAcwW9Zds", - "NDY3MjIzMjMwNjUwNzc3NjQx.XsySD_.s45jqDV_Iisn-symw0yDRrk_jf4", - ) - - for token in tokens: - with self.subTest(token=token): - results = token_remover.TOKEN_RE.fullmatch(token) - self.assertIsNotNone(results, f"{token} was not matched by the regex") - - def test_regex_matches_multiple_valid(self): - """Should support multiple matches in the middle of a string.""" - token_1 = "NDY3MjIzMjMwNjUwNzc3NjQx.XsyWGg.uFNEQPCc4ePwGh7egG8UicQssz8" - token_2 = "NDcyMjY1OTQzMDYyNDEzMzMy.XsyWMw.l8XPnDqb0lp-EiQ2g_0xVFT1pyc" - message = f"garbage {token_1} hello {token_2} world" - - results = token_remover.TOKEN_RE.finditer(message) - results = [match[0] for match in results] - self.assertCountEqual((token_1, token_2), results) - - @autospec("bot.exts.filters.token_remover", "LOG_MESSAGE") - def test_format_log_message(self, log_message): - """Should correctly format the log message with info from the message and token.""" - token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") - log_message.format.return_value = "Howdy" - - return_value = TokenRemover.format_log_message(self.msg, token) - - self.assertEqual(return_value, log_message.format.return_value) - log_message.format.assert_called_once_with( - author=format_user(self.msg.author), - channel=self.msg.channel.mention, - user_id=token.user_id, - timestamp=token.timestamp, - hmac="xxxxxxxxxxxxxxxxxxxxxxxxjf4", - ) - - @autospec("bot.exts.filters.token_remover", "UNKNOWN_USER_LOG_MESSAGE") - async def test_format_userid_log_message_unknown(self, unknown_user_log_message,): - """Should correctly format the user ID portion when the actual user it belongs to is unknown.""" - token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") - unknown_user_log_message.format.return_value = " Partner" - msg = MockMessage(id=555, content="hello world") - msg.guild.get_member.return_value = None - msg.guild.fetch_member.side_effect = NotFound(mock.Mock(status=404), "Not found") - - return_value = await TokenRemover.format_userid_log_message(msg, token) - - self.assertEqual(return_value, (unknown_user_log_message.format.return_value, False)) - unknown_user_log_message.format.assert_called_once_with(user_id=472265943062413332) - - @autospec("bot.exts.filters.token_remover", "KNOWN_USER_LOG_MESSAGE") - async def test_format_userid_log_message_bot(self, known_user_log_message): - """Should correctly format the user ID portion when the ID belongs to a known bot.""" - token = Token("NDcyMjY1OTQzMDYyNDEzMzMy", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") - known_user_log_message.format.return_value = " Partner" - msg = MockMessage(id=555, content="hello world") - msg.guild.get_member.return_value.__str__.return_value = "Sam" - msg.guild.get_member.return_value.bot = True - - return_value = await TokenRemover.format_userid_log_message(msg, token) - - self.assertEqual(return_value, (known_user_log_message.format.return_value, True)) - - known_user_log_message.format.assert_called_once_with( - user_id=472265943062413332, - user_name="Sam", - kind="BOT", - ) - - @autospec("bot.exts.filters.token_remover", "KNOWN_USER_LOG_MESSAGE") - async def test_format_log_message_user_token_user(self, user_token_message): - """Should correctly format the user ID portion when the ID belongs to a known user.""" - token = Token("NDY3MjIzMjMwNjUwNzc3NjQx", "XsySD_", "s45jqDV_Iisn-symw0yDRrk_jf4") - user_token_message.format.return_value = "Partner" - - return_value = await TokenRemover.format_userid_log_message(self.msg, token) - - self.assertEqual(return_value, (user_token_message.format.return_value, True)) - user_token_message.format.assert_called_once_with( - user_id=467223230650777641, - user_name="Woody", - kind="USER", - ) - - @mock.patch.object(TokenRemover, "mod_log", new_callable=mock.PropertyMock) - @autospec("bot.exts.filters.token_remover", "log") - @autospec(TokenRemover, "format_log_message", "format_userid_log_message") - async def test_take_action(self, format_log_message, format_userid_log_message, logger, mod_log_property): - """Should delete the message and send a mod log.""" - cog = TokenRemover(self.bot) - mod_log = mock.create_autospec(ModLog, spec_set=True, instance=True) - token = mock.create_autospec(Token, spec_set=True, instance=True) - token.user_id = "no-id" - log_msg = "testing123" - userid_log_message = "userid-log-message" - - mod_log_property.return_value = mod_log - format_log_message.return_value = log_msg - format_userid_log_message.return_value = (userid_log_message, True) - - await cog.take_action(self.msg, token) - - self.msg.delete.assert_called_once_with() - self.msg.channel.send.assert_called_once_with( - token_remover.DELETION_MESSAGE_TEMPLATE.format(mention=self.msg.author.mention) - ) - - format_log_message.assert_called_once_with(self.msg, token) - format_userid_log_message.assert_called_once_with(self.msg, token) - logger.debug.assert_called_with(log_msg) - self.bot.stats.incr.assert_called_once_with("tokens.removed_tokens") - - mod_log.ignore.assert_called_once_with(constants.Event.message_delete, self.msg.id) - mod_log.send_log_message.assert_called_once_with( - icon_url=constants.Icons.token_removed, - colour=Colour(constants.Colours.soft_red), - title="Token removed!", - text=log_msg + "\n" + userid_log_message, - thumbnail=self.msg.author.display_avatar.url, - channel_id=constants.Channels.mod_alerts, - ping_everyone=True, - ) - - @mock.patch.object(TokenRemover, "mod_log", new_callable=mock.PropertyMock) - async def test_take_action_delete_failure(self, mod_log_property): - """Shouldn't send any messages if the token message can't be deleted.""" - cog = TokenRemover(self.bot) - mod_log_property.return_value = mock.create_autospec(ModLog, spec_set=True, instance=True) - self.msg.delete.side_effect = NotFound(MagicMock(), MagicMock()) - - token = mock.create_autospec(Token, spec_set=True, instance=True) - await cog.take_action(self.msg, token) - - self.msg.delete.assert_called_once_with() - self.msg.channel.send.assert_not_awaited() - - -class TokenRemoverExtensionTests(unittest.IsolatedAsyncioTestCase): - """Tests for the token_remover extension.""" - - @autospec("bot.exts.filters.token_remover", "TokenRemover") - async def test_extension_setup(self, cog): - """The TokenRemover cog should be added.""" - bot = MockBot() - await token_remover.setup(bot) - - cog.assert_called_once_with(bot) - bot.add_cog.assert_awaited_once() - self.assertTrue(isinstance(bot.add_cog.call_args.args[0], TokenRemover)) diff --git a/tests/bot/rules/__init__.py b/tests/bot/rules/__init__.py deleted file mode 100644 index 0d570f5a3..000000000 --- a/tests/bot/rules/__init__.py +++ /dev/null @@ -1,76 +0,0 @@ -import unittest -from abc import ABCMeta, abstractmethod -from typing import Callable, Dict, Iterable, List, NamedTuple, Tuple - -from tests.helpers import MockMessage - - -class DisallowedCase(NamedTuple): - """Encapsulation for test cases expected to fail.""" - recent_messages: List[MockMessage] - culprits: Iterable[str] - n_violations: int - - -class RuleTest(unittest.IsolatedAsyncioTestCase, metaclass=ABCMeta): - """ - Abstract class for antispam rule test cases. - - Tests for specific rules should inherit from `RuleTest` and implement - `relevant_messages` and `get_report`. Each instance should also set the - `apply` and `config` attributes as necessary. - - The execution of test cases can then be delegated to the `run_allowed` - and `run_disallowed` methods. - """ - - apply: Callable # The tested rule's apply function - config: Dict[str, int] - - async def run_allowed(self, cases: Tuple[List[MockMessage], ...]) -> None: - """Run all `cases` against `self.apply` expecting them to pass.""" - for recent_messages in cases: - last_message = recent_messages[0] - - with self.subTest( - last_message=last_message, - recent_messages=recent_messages, - config=self.config, - ): - self.assertIsNone( - await self.apply(last_message, recent_messages, self.config) - ) - - async def run_disallowed(self, cases: Tuple[DisallowedCase, ...]) -> None: - """Run all `cases` against `self.apply` expecting them to fail.""" - for case in cases: - recent_messages, culprits, n_violations = case - last_message = recent_messages[0] - relevant_messages = self.relevant_messages(case) - desired_output = ( - self.get_report(case), - culprits, - relevant_messages, - ) - - with self.subTest( - last_message=last_message, - recent_messages=recent_messages, - relevant_messages=relevant_messages, - n_violations=n_violations, - config=self.config, - ): - self.assertTupleEqual( - await self.apply(last_message, recent_messages, self.config), - desired_output, - ) - - @abstractmethod - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - """Give expected relevant messages for `case`.""" - raise NotImplementedError # pragma: no cover - - @abstractmethod - def get_report(self, case: DisallowedCase) -> str: - """Give expected error report for `case`.""" - raise NotImplementedError # pragma: no cover diff --git a/tests/bot/rules/test_attachments.py b/tests/bot/rules/test_attachments.py deleted file mode 100644 index d7e779221..000000000 --- a/tests/bot/rules/test_attachments.py +++ /dev/null @@ -1,69 +0,0 @@ -from typing import Iterable - -from bot.rules import attachments -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, total_attachments: int) -> MockMessage: - """Builds a message with `total_attachments` attachments.""" - return MockMessage(author=author, attachments=list(range(total_attachments))) - - -class AttachmentRuleTests(RuleTest): - """Tests applying the `attachments` antispam rule.""" - - def setUp(self): - self.apply = attachments.apply - self.config = {"max": 5, "interval": 10} - - async def test_allows_messages_without_too_many_attachments(self): - """Messages without too many attachments are allowed as-is.""" - cases = ( - [make_msg("bob", 0), make_msg("bob", 0), make_msg("bob", 0)], - [make_msg("bob", 2), make_msg("bob", 2)], - [make_msg("bob", 2), make_msg("alice", 2), make_msg("bob", 2)], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_with_too_many_attachments(self): - """Messages with too many attachments trigger the rule.""" - cases = ( - DisallowedCase( - [make_msg("bob", 4), make_msg("bob", 0), make_msg("bob", 6)], - ("bob",), - 10, - ), - DisallowedCase( - [make_msg("bob", 4), make_msg("alice", 6), make_msg("bob", 2)], - ("bob",), - 6, - ), - DisallowedCase( - [make_msg("alice", 6)], - ("alice",), - 6, - ), - DisallowedCase( - [make_msg("alice", 1) for _ in range(6)], - ("alice",), - 6, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if ( - msg.author == last_message.author - and len(msg.attachments) > 0 - ) - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} attachments in {self.config['interval']}s" diff --git a/tests/bot/rules/test_burst.py b/tests/bot/rules/test_burst.py deleted file mode 100644 index 03682966b..000000000 --- a/tests/bot/rules/test_burst.py +++ /dev/null @@ -1,54 +0,0 @@ -from typing import Iterable - -from bot.rules import burst -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str) -> MockMessage: - """ - Init a MockMessage instance with author set to `author`. - - This serves as a shorthand / alias to keep the test cases visually clean. - """ - return MockMessage(author=author) - - -class BurstRuleTests(RuleTest): - """Tests the `burst` antispam rule.""" - - def setUp(self): - self.apply = burst.apply - self.config = {"max": 2, "interval": 10} - - async def test_allows_messages_within_limit(self): - """Cases which do not violate the rule.""" - cases = ( - [make_msg("bob"), make_msg("bob")], - [make_msg("bob"), make_msg("alice"), make_msg("bob")], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases where the amount of messages exceeds the limit, triggering the rule.""" - cases = ( - DisallowedCase( - [make_msg("bob"), make_msg("bob"), make_msg("bob")], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("bob"), make_msg("bob"), make_msg("alice"), make_msg("bob")], - ("bob",), - 3, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - return tuple(msg for msg in case.recent_messages if msg.author in case.culprits) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} messages in {self.config['interval']}s" diff --git a/tests/bot/rules/test_burst_shared.py b/tests/bot/rules/test_burst_shared.py deleted file mode 100644 index 3275143d5..000000000 --- a/tests/bot/rules/test_burst_shared.py +++ /dev/null @@ -1,57 +0,0 @@ -from typing import Iterable - -from bot.rules import burst_shared -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str) -> MockMessage: - """ - Init a MockMessage instance with the passed arg. - - This serves as a shorthand / alias to keep the test cases visually clean. - """ - return MockMessage(author=author) - - -class BurstSharedRuleTests(RuleTest): - """Tests the `burst_shared` antispam rule.""" - - def setUp(self): - self.apply = burst_shared.apply - self.config = {"max": 2, "interval": 10} - - async def test_allows_messages_within_limit(self): - """ - Cases that do not violate the rule. - - There really isn't more to test here than a single case. - """ - cases = ( - [make_msg("spongebob"), make_msg("patrick")], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases where the amount of messages exceeds the limit, triggering the rule.""" - cases = ( - DisallowedCase( - [make_msg("bob"), make_msg("bob"), make_msg("bob")], - {"bob"}, - 3, - ), - DisallowedCase( - [make_msg("bob"), make_msg("bob"), make_msg("alice"), make_msg("bob")], - {"bob", "alice"}, - 4, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - return case.recent_messages - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} messages in {self.config['interval']}s" diff --git a/tests/bot/rules/test_chars.py b/tests/bot/rules/test_chars.py deleted file mode 100644 index f1e3c76a7..000000000 --- a/tests/bot/rules/test_chars.py +++ /dev/null @@ -1,64 +0,0 @@ -from typing import Iterable - -from bot.rules import chars -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, n_chars: int) -> MockMessage: - """Build a message with arbitrary content of `n_chars` length.""" - return MockMessage(author=author, content="A" * n_chars) - - -class CharsRuleTests(RuleTest): - """Tests the `chars` antispam rule.""" - - def setUp(self): - self.apply = chars.apply - self.config = { - "max": 20, # Max allowed sum of chars per user - "interval": 10, - } - - async def test_allows_messages_within_limit(self): - """Cases with a total amount of chars within limit.""" - cases = ( - [make_msg("bob", 0)], - [make_msg("bob", 20)], - [make_msg("bob", 15), make_msg("alice", 15)], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases where the total amount of chars exceeds the limit, triggering the rule.""" - cases = ( - DisallowedCase( - [make_msg("bob", 21)], - ("bob",), - 21, - ), - DisallowedCase( - [make_msg("bob", 15), make_msg("bob", 15)], - ("bob",), - 30, - ), - DisallowedCase( - [make_msg("alice", 15), make_msg("bob", 20), make_msg("alice", 15)], - ("alice",), - 30, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if msg.author == last_message.author - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} characters in {self.config['interval']}s" diff --git a/tests/bot/rules/test_discord_emojis.py b/tests/bot/rules/test_discord_emojis.py deleted file mode 100644 index 66c2d9f92..000000000 --- a/tests/bot/rules/test_discord_emojis.py +++ /dev/null @@ -1,73 +0,0 @@ -from typing import Iterable - -from bot.rules import discord_emojis -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - -discord_emoji = "<:abcd:1234>" # Discord emojis follow the format <:name:id> -unicode_emoji = "🧪" - - -def make_msg(author: str, n_emojis: int, emoji: str = discord_emoji) -> MockMessage: - """Build a MockMessage instance with content containing `n_emojis` arbitrary emojis.""" - return MockMessage(author=author, content=emoji * n_emojis) - - -class DiscordEmojisRuleTests(RuleTest): - """Tests for the `discord_emojis` antispam rule.""" - - def setUp(self): - self.apply = discord_emojis.apply - self.config = {"max": 2, "interval": 10} - - async def test_allows_messages_within_limit(self): - """Cases with a total amount of discord and unicode emojis within limit.""" - cases = ( - [make_msg("bob", 2)], - [make_msg("alice", 1), make_msg("bob", 2), make_msg("alice", 1)], - [make_msg("bob", 2, unicode_emoji)], - [ - make_msg("alice", 1, unicode_emoji), - make_msg("bob", 2, unicode_emoji), - make_msg("alice", 1, unicode_emoji) - ], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases with more than the allowed amount of discord and unicode emojis.""" - cases = ( - DisallowedCase( - [make_msg("bob", 3)], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("alice", 2), make_msg("bob", 2), make_msg("alice", 2)], - ("alice",), - 4, - ), - DisallowedCase( - [make_msg("bob", 3, unicode_emoji)], - ("bob",), - 3, - ), - DisallowedCase( - [ - make_msg("alice", 2, unicode_emoji), - make_msg("bob", 2, unicode_emoji), - make_msg("alice", 2, unicode_emoji) - ], - ("alice",), - 4 - ) - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - return tuple(msg for msg in case.recent_messages if msg.author in case.culprits) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} emojis in {self.config['interval']}s" diff --git a/tests/bot/rules/test_duplicates.py b/tests/bot/rules/test_duplicates.py deleted file mode 100644 index 9bd886a77..000000000 --- a/tests/bot/rules/test_duplicates.py +++ /dev/null @@ -1,64 +0,0 @@ -from typing import Iterable - -from bot.rules import duplicates -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, content: str) -> MockMessage: - """Give a MockMessage instance with `author` and `content` attrs.""" - return MockMessage(author=author, content=content) - - -class DuplicatesRuleTests(RuleTest): - """Tests the `duplicates` antispam rule.""" - - def setUp(self): - self.apply = duplicates.apply - self.config = {"max": 2, "interval": 10} - - async def test_allows_messages_within_limit(self): - """Cases which do not violate the rule.""" - cases = ( - [make_msg("alice", "A"), make_msg("alice", "A")], - [make_msg("alice", "A"), make_msg("alice", "B"), make_msg("alice", "C")], # Non-duplicate - [make_msg("alice", "A"), make_msg("bob", "A"), make_msg("alice", "A")], # Different author - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases with too many duplicate messages from the same author.""" - cases = ( - DisallowedCase( - [make_msg("alice", "A"), make_msg("alice", "A"), make_msg("alice", "A")], - ("alice",), - 3, - ), - DisallowedCase( - [make_msg("bob", "A"), make_msg("alice", "A"), make_msg("bob", "A"), make_msg("bob", "A")], - ("bob",), - 3, # 4 duplicate messages, but only 3 from bob - ), - DisallowedCase( - [make_msg("bob", "A"), make_msg("bob", "B"), make_msg("bob", "A"), make_msg("bob", "A")], - ("bob",), - 3, # 4 message from bob, but only 3 duplicates - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if ( - msg.author == last_message.author - and msg.content == last_message.content - ) - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} duplicated messages in {self.config['interval']}s" diff --git a/tests/bot/rules/test_links.py b/tests/bot/rules/test_links.py deleted file mode 100644 index b091bd9d7..000000000 --- a/tests/bot/rules/test_links.py +++ /dev/null @@ -1,67 +0,0 @@ -from typing import Iterable - -from bot.rules import links -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, total_links: int) -> MockMessage: - """Makes a message with `total_links` links.""" - content = " ".join(["https://pydis.com"] * total_links) - return MockMessage(author=author, content=content) - - -class LinksTests(RuleTest): - """Tests applying the `links` rule.""" - - def setUp(self): - self.apply = links.apply - self.config = { - "max": 2, - "interval": 10 - } - - async def test_links_within_limit(self): - """Messages with an allowed amount of links.""" - cases = ( - [make_msg("bob", 0)], - [make_msg("bob", 2)], - [make_msg("bob", 3)], # Filter only applies if len(messages_with_links) > 1 - [make_msg("bob", 1), make_msg("bob", 1)], - [make_msg("bob", 2), make_msg("alice", 2)] # Only messages from latest author count - ) - - await self.run_allowed(cases) - - async def test_links_exceeding_limit(self): - """Messages with a a higher than allowed amount of links.""" - cases = ( - DisallowedCase( - [make_msg("bob", 1), make_msg("bob", 2)], - ("bob",), - 3 - ), - DisallowedCase( - [make_msg("alice", 1), make_msg("alice", 1), make_msg("alice", 1)], - ("alice",), - 3 - ), - DisallowedCase( - [make_msg("alice", 2), make_msg("bob", 3), make_msg("alice", 1)], - ("alice",), - 3 - ) - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if msg.author == last_message.author - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} links in {self.config['interval']}s" diff --git a/tests/bot/rules/test_mentions.py b/tests/bot/rules/test_mentions.py deleted file mode 100644 index e1f904917..000000000 --- a/tests/bot/rules/test_mentions.py +++ /dev/null @@ -1,131 +0,0 @@ -from typing import Iterable, Optional - -import discord - -from bot.rules import mentions -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMember, MockMessage, MockMessageReference - - -def make_msg( - author: str, - total_user_mentions: int, - total_bot_mentions: int = 0, - *, - reference: Optional[MockMessageReference] = None -) -> MockMessage: - """Makes a message from `author` with `total_user_mentions` user mentions and `total_bot_mentions` bot mentions.""" - user_mentions = [MockMember() for _ in range(total_user_mentions)] - bot_mentions = [MockMember(bot=True) for _ in range(total_bot_mentions)] - - mentions = user_mentions + bot_mentions - if reference is not None: - # For the sake of these tests we assume that all references are mentions. - mentions.append(reference.resolved.author) - msg_type = discord.MessageType.reply - else: - msg_type = discord.MessageType.default - - return MockMessage(author=author, mentions=mentions, reference=reference, type=msg_type) - - -class TestMentions(RuleTest): - """Tests applying the `mentions` antispam rule.""" - - def setUp(self): - self.apply = mentions.apply - self.config = { - "max": 2, - "interval": 10, - } - - async def test_mentions_within_limit(self): - """Messages with an allowed amount of mentions.""" - cases = ( - [make_msg("bob", 0)], - [make_msg("bob", 2)], - [make_msg("bob", 1), make_msg("bob", 1)], - [make_msg("bob", 1), make_msg("alice", 2)], - ) - - await self.run_allowed(cases) - - async def test_mentions_exceeding_limit(self): - """Messages with a higher than allowed amount of mentions.""" - cases = ( - DisallowedCase( - [make_msg("bob", 3)], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("alice", 2), make_msg("alice", 0), make_msg("alice", 1)], - ("alice",), - 3, - ), - DisallowedCase( - [make_msg("bob", 2), make_msg("alice", 3), make_msg("bob", 2)], - ("bob",), - 4, - ), - DisallowedCase( - [make_msg("bob", 3, 1)], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("bob", 3, reference=MockMessageReference())], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("bob", 3, reference=MockMessageReference(reference_author_is_bot=True))], - ("bob",), - 3 - ) - ) - - await self.run_disallowed(cases) - - async def test_ignore_bot_mentions(self): - """Messages with an allowed amount of mentions, also containing bot mentions.""" - cases = ( - [make_msg("bob", 0, 3)], - [make_msg("bob", 2, 1)], - [make_msg("bob", 1, 2), make_msg("bob", 1, 2)], - [make_msg("bob", 1, 5), make_msg("alice", 2, 5)] - ) - - await self.run_allowed(cases) - - async def test_ignore_reply_mentions(self): - """Messages with an allowed amount of mentions in the content, also containing reply mentions.""" - cases = ( - [ - make_msg("bob", 2, reference=MockMessageReference()) - ], - [ - make_msg("bob", 2, reference=MockMessageReference(reference_author_is_bot=True)) - ], - [ - make_msg("bob", 2, reference=MockMessageReference()), - make_msg("bob", 0, reference=MockMessageReference()) - ], - [ - make_msg("bob", 2, reference=MockMessageReference(reference_author_is_bot=True)), - make_msg("bob", 0, reference=MockMessageReference(reference_author_is_bot=True)) - ] - ) - - await self.run_allowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if msg.author == last_message.author - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} mentions in {self.config['interval']}s" diff --git a/tests/bot/rules/test_newlines.py b/tests/bot/rules/test_newlines.py deleted file mode 100644 index e35377773..000000000 --- a/tests/bot/rules/test_newlines.py +++ /dev/null @@ -1,102 +0,0 @@ -from typing import Iterable, List - -from bot.rules import newlines -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, newline_groups: List[int]) -> MockMessage: - """Init a MockMessage instance with `author` and content configured by `newline_groups". - - Configure content by passing a list of ints, where each int `n` will generate - a separate group of `n` newlines. - - Example: - newline_groups=[3, 1, 2] -> content="\n\n\n \n \n\n" - """ - content = " ".join("\n" * n for n in newline_groups) - return MockMessage(author=author, content=content) - - -class TotalNewlinesRuleTests(RuleTest): - """Tests the `newlines` antispam rule against allowed cases and total newline count violations.""" - - def setUp(self): - self.apply = newlines.apply - self.config = { - "max": 5, # Max sum of newlines in relevant messages - "max_consecutive": 3, # Max newlines in one group, in one message - "interval": 10, - } - - async def test_allows_messages_within_limit(self): - """Cases which do not violate the rule.""" - cases = ( - [make_msg("alice", [])], # Single message with no newlines - [make_msg("alice", [1, 2]), make_msg("alice", [1, 1])], # 5 newlines in 2 messages - [make_msg("alice", [2, 2, 1]), make_msg("bob", [2, 3])], # 5 newlines from each author - [make_msg("bob", [1]), make_msg("alice", [5])], # Alice breaks the rule, but only bob is relevant - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_total(self): - """Cases which violate the rule by having too many newlines in total.""" - cases = ( - DisallowedCase( # Alice sends a total of 6 newlines (disallowed) - [make_msg("alice", [2, 2]), make_msg("alice", [2])], - ("alice",), - 6, - ), - DisallowedCase( # Here we test that only alice's newlines count in the sum - [make_msg("alice", [2, 2]), make_msg("bob", [3]), make_msg("alice", [3])], - ("alice",), - 7, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_author = case.recent_messages[0].author - return tuple(msg for msg in case.recent_messages if msg.author == last_author) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} newlines in {self.config['interval']}s" - - -class GroupNewlinesRuleTests(RuleTest): - """ - Tests the `newlines` antispam rule against max consecutive newline violations. - - As these violations yield a different error report, they require a different - `get_report` implementation. - """ - - def setUp(self): - self.apply = newlines.apply - self.config = {"max": 5, "max_consecutive": 3, "interval": 10} - - async def test_disallows_messages_consecutive(self): - """Cases which violate the rule due to having too many consecutive newlines.""" - cases = ( - DisallowedCase( # Bob sends a group of newlines too large - [make_msg("bob", [4])], - ("bob",), - 4, - ), - DisallowedCase( # Alice sends 5 in total (allowed), but 4 in one group (disallowed) - [make_msg("alice", [1]), make_msg("alice", [4])], - ("alice",), - 4, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_author = case.recent_messages[0].author - return tuple(msg for msg in case.recent_messages if msg.author == last_author) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} consecutive newlines in {self.config['interval']}s" diff --git a/tests/bot/rules/test_role_mentions.py b/tests/bot/rules/test_role_mentions.py deleted file mode 100644 index 26c05d527..000000000 --- a/tests/bot/rules/test_role_mentions.py +++ /dev/null @@ -1,55 +0,0 @@ -from typing import Iterable - -from bot.rules import role_mentions -from tests.bot.rules import DisallowedCase, RuleTest -from tests.helpers import MockMessage - - -def make_msg(author: str, n_mentions: int) -> MockMessage: - """Build a MockMessage instance with `n_mentions` role mentions.""" - return MockMessage(author=author, role_mentions=[None] * n_mentions) - - -class RoleMentionsRuleTests(RuleTest): - """Tests for the `role_mentions` antispam rule.""" - - def setUp(self): - self.apply = role_mentions.apply - self.config = {"max": 2, "interval": 10} - - async def test_allows_messages_within_limit(self): - """Cases with a total amount of role mentions within limit.""" - cases = ( - [make_msg("bob", 2)], - [make_msg("bob", 1), make_msg("alice", 1), make_msg("bob", 1)], - ) - - await self.run_allowed(cases) - - async def test_disallows_messages_beyond_limit(self): - """Cases with more than the allowed amount of role mentions.""" - cases = ( - DisallowedCase( - [make_msg("bob", 3)], - ("bob",), - 3, - ), - DisallowedCase( - [make_msg("alice", 2), make_msg("bob", 2), make_msg("alice", 2)], - ("alice",), - 4, - ), - ) - - await self.run_disallowed(cases) - - def relevant_messages(self, case: DisallowedCase) -> Iterable[MockMessage]: - last_message = case.recent_messages[0] - return tuple( - msg - for msg in case.recent_messages - if msg.author == last_message.author - ) - - def get_report(self, case: DisallowedCase) -> str: - return f"sent {case.n_violations} role mentions in {self.config['interval']}s" diff --git a/tests/helpers.py b/tests/helpers.py index 1a71f210a..020f1aee5 100644 --- a/tests/helpers.py +++ b/tests/helpers.py @@ -393,15 +393,15 @@ dm_channel_instance = discord.DMChannel(me=me, state=state, data=dm_channel_data class MockDMChannel(CustomMockMixin, unittest.mock.Mock, HashableMixin): """ - A MagicMock subclass to mock TextChannel objects. + A MagicMock subclass to mock DMChannel objects. - Instances of this class will follow the specifications of `discord.TextChannel` instances. For + Instances of this class will follow the specifications of `discord.DMChannel` instances. For more information, see the `MockGuild` docstring. """ spec_set = dm_channel_instance def __init__(self, **kwargs) -> None: - default_kwargs = {'id': next(self.discord_id), 'recipient': MockUser(), "me": MockUser()} + default_kwargs = {'id': next(self.discord_id), 'recipient': MockUser(), "me": MockUser(), 'guild': None} super().__init__(**collections.ChainMap(kwargs, default_kwargs)) @@ -423,7 +423,7 @@ category_channel_instance = discord.CategoryChannel( class MockCategoryChannel(CustomMockMixin, unittest.mock.Mock, HashableMixin): def __init__(self, **kwargs) -> None: default_kwargs = {'id': next(self.discord_id)} - super().__init__(**collections.ChainMap(default_kwargs, kwargs)) + super().__init__(**collections.ChainMap(kwargs, default_kwargs)) # Create a Message instance to get a realistic MagicMock of `discord.Message` |