diff options
Diffstat (limited to 'bot/exts/moderation/modlog.py')
| -rw-r--r-- | bot/exts/moderation/modlog.py | 830 |
1 files changed, 830 insertions, 0 deletions
diff --git a/bot/exts/moderation/modlog.py b/bot/exts/moderation/modlog.py new file mode 100644 index 000000000..41ed46b69 --- /dev/null +++ b/bot/exts/moderation/modlog.py @@ -0,0 +1,830 @@ +import asyncio +import difflib +import itertools +import logging +import typing as t +from datetime import datetime +from itertools import zip_longest + +import discord +from dateutil.relativedelta import relativedelta +from deepdiff import DeepDiff +from discord import Colour +from discord.abc import GuildChannel +from discord.ext.commands import Cog, Context + +from bot.bot import Bot +from bot.constants import Categories, Channels, Colours, Emojis, Event, Guild as GuildConstant, Icons, URLs +from bot.utils.messages import format_user +from bot.utils.time import humanize_delta + +log = logging.getLogger(__name__) + +GUILD_CHANNEL = t.Union[discord.CategoryChannel, discord.TextChannel, discord.VoiceChannel] + +CHANNEL_CHANGES_UNSUPPORTED = ("permissions",) +CHANNEL_CHANGES_SUPPRESSED = ("_overwrites", "position") +ROLE_CHANGES_UNSUPPORTED = ("colour", "permissions") + +VOICE_STATE_ATTRIBUTES = { + "channel.name": "Channel", + "self_stream": "Streaming", + "self_video": "Broadcasting", +} + + +class ModLog(Cog, name="ModLog"): + """Logging for server events and staff actions.""" + + def __init__(self, bot: Bot): + self.bot = bot + self._ignored = {event: [] for event in Event} + + self._cached_deletes = [] + 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 = [] + + response = await self.bot.api_client.post( + 'bot/deleted-messages', + json={ + 'actor': actor_id, + 'creation': datetime.utcnow().isoformat(), + 'deletedmessage_set': [ + { + 'id': message.id, + 'author': message.author.id, + 'channel_id': message.channel.id, + 'content': message.content, + 'embeds': [embed.to_dict() for embed in message.embeds], + 'attachments': attachment, + } + for message, attachment in zip_longest(messages, attachments, fillvalue=[]) + ] + } + ) + + 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: + if item not in self._ignored[event]: + self._ignored[event].append(item) + + async def send_log_message( + self, + icon_url: t.Optional[str], + colour: t.Union[discord.Colour, int], + title: t.Optional[str], + text: str, + thumbnail: t.Optional[t.Union[str, discord.Asset]] = None, + channel_id: int = Channels.mod_log, + ping_everyone: bool = False, + files: t.Optional[t.List[discord.File]] = None, + content: t.Optional[str] = None, + additional_embeds: t.Optional[t.List[discord.Embed]] = None, + additional_embeds_msg: t.Optional[str] = None, + timestamp_override: t.Optional[datetime] = None, + footer: t.Optional[str] = None, + ) -> Context: + """Generate log embed and send to logging channel.""" + # Truncate string directly here to avoid removing newlines + embed = discord.Embed( + description=text[:2045] + "..." if len(text) > 2048 else text + ) + + if title and icon_url: + embed.set_author(name=title, icon_url=icon_url) + + embed.colour = colour + embed.timestamp = timestamp_override or datetime.utcnow() + + if footer: + embed.set_footer(text=footer) + + if thumbnail: + embed.set_thumbnail(url=thumbnail) + + if ping_everyone: + if content: + content = f"@everyone\n{content}" + else: + content = "@everyone" + + # Truncate content to 2000 characters and append an ellipsis. + if content and len(content) > 2000: + content = content[:2000 - 3] + "..." + + channel = self.bot.get_channel(channel_id) + log_message = await channel.send( + content=content, + embed=embed, + files=files, + allowed_mentions=discord.AllowedMentions(everyone=True) + ) + + if additional_embeds: + if additional_embeds_msg: + await channel.send(additional_embeds_msg) + for additional_embed in additional_embeds: + await channel.send(embed=additional_embed) + + return await self.bot.get_context(log_message) # Optionally return for use with antispam + + @Cog.listener() + async def on_guild_channel_create(self, channel: GUILD_CHANNEL) -> None: + """Log channel create event to mod log.""" + if channel.guild.id != GuildConstant.id: + return + + if isinstance(channel, discord.CategoryChannel): + title = "Category created" + message = f"{channel.name} (`{channel.id}`)" + elif isinstance(channel, discord.VoiceChannel): + title = "Voice channel created" + + if channel.category: + message = f"{channel.category}/{channel.name} (`{channel.id}`)" + else: + message = f"{channel.name} (`{channel.id}`)" + else: + title = "Text channel created" + + if channel.category: + message = f"{channel.category}/{channel.name} (`{channel.id}`)" + else: + message = f"{channel.name} (`{channel.id}`)" + + await self.send_log_message(Icons.hash_green, Colours.soft_green, title, message) + + @Cog.listener() + async def on_guild_channel_delete(self, channel: GUILD_CHANNEL) -> None: + """Log channel delete event to mod log.""" + if channel.guild.id != GuildConstant.id: + return + + if isinstance(channel, discord.CategoryChannel): + title = "Category deleted" + elif isinstance(channel, discord.VoiceChannel): + title = "Voice channel deleted" + else: + title = "Text channel deleted" + + if channel.category and not isinstance(channel, discord.CategoryChannel): + message = f"{channel.category}/{channel.name} (`{channel.id}`)" + else: + message = f"{channel.name} (`{channel.id}`)" + + await self.send_log_message( + Icons.hash_red, Colours.soft_red, + title, message + ) + + @Cog.listener() + async def on_guild_channel_update(self, before: GUILD_CHANNEL, after: GuildChannel) -> None: + """Log channel update event to mod log.""" + if before.guild.id != GuildConstant.id: + return + + if before.id in self._ignored[Event.guild_channel_update]: + self._ignored[Event.guild_channel_update].remove(before.id) + return + + # Two channel updates are sent for a single edit: 1 for topic and 1 for category change. + # TODO: remove once support is added for ignoring multiple occurrences for the same channel. + help_categories = (Categories.help_available, Categories.help_dormant, Categories.help_in_use) + if after.category and after.category.id in help_categories: + return + + diff = DeepDiff(before, after) + changes = [] + done = [] + + diff_values = diff.get("values_changed", {}) + diff_values.update(diff.get("type_changes", {})) + + for key, value in diff_values.items(): + if not key: # Not sure why, but it happens + continue + + key = key[5:] # Remove "root." prefix + + if "[" in key: + key = key.split("[", 1)[0] + + if "." in key: + key = key.split(".", 1)[0] + + if key in done or key in CHANNEL_CHANGES_SUPPRESSED: + continue + + if key in CHANNEL_CHANGES_UNSUPPORTED: + changes.append(f"**{key.title()}** updated") + else: + new = value["new_value"] + old = value["old_value"] + + # Discord does not treat consecutive backticks ("``") as an empty inline code block, so the markdown + # formatting is broken when `new` and/or `old` are empty values. "None" is used for these cases so + # formatting is preserved. + changes.append(f"**{key.title()}:** `{old or 'None'}` **→** `{new or 'None'}`") + + done.append(key) + + if not changes: + return + + message = "" + + for item in sorted(changes): + message += f"{Emojis.bullet} {item}\n" + + if after.category: + message = f"**{after.category}/#{after.name} (`{after.id}`)**\n{message}" + else: + message = f"**#{after.name}** (`{after.id}`)\n{message}" + + await self.send_log_message( + Icons.hash_blurple, Colour.blurple(), + "Channel updated", message + ) + + @Cog.listener() + async def on_guild_role_create(self, role: discord.Role) -> None: + """Log role create event to mod log.""" + if role.guild.id != GuildConstant.id: + return + + await self.send_log_message( + Icons.crown_green, Colours.soft_green, + "Role created", f"`{role.id}`" + ) + + @Cog.listener() + async def on_guild_role_delete(self, role: discord.Role) -> None: + """Log role delete event to mod log.""" + if role.guild.id != GuildConstant.id: + return + + await self.send_log_message( + Icons.crown_red, Colours.soft_red, + "Role removed", f"{role.name} (`{role.id}`)" + ) + + @Cog.listener() + async def on_guild_role_update(self, before: discord.Role, after: discord.Role) -> None: + """Log role update event to mod log.""" + if before.guild.id != GuildConstant.id: + return + + diff = DeepDiff(before, after) + changes = [] + done = [] + + diff_values = diff.get("values_changed", {}) + diff_values.update(diff.get("type_changes", {})) + + for key, value in diff_values.items(): + if not key: # Not sure why, but it happens + continue + + key = key[5:] # Remove "root." prefix + + if "[" in key: + key = key.split("[", 1)[0] + + if "." in key: + key = key.split(".", 1)[0] + + if key in done or key == "color": + continue + + if key in ROLE_CHANGES_UNSUPPORTED: + changes.append(f"**{key.title()}** updated") + else: + new = value["new_value"] + old = value["old_value"] + + changes.append(f"**{key.title()}:** `{old}` **→** `{new}`") + + done.append(key) + + if not changes: + return + + message = "" + + for item in sorted(changes): + message += f"{Emojis.bullet} {item}\n" + + message = f"**{after.name}** (`{after.id}`)\n{message}" + + await self.send_log_message( + Icons.crown_blurple, Colour.blurple(), + "Role updated", message + ) + + @Cog.listener() + async def on_guild_update(self, before: discord.Guild, after: discord.Guild) -> None: + """Log guild update event to mod log.""" + if before.id != GuildConstant.id: + return + + diff = DeepDiff(before, after) + changes = [] + done = [] + + diff_values = diff.get("values_changed", {}) + diff_values.update(diff.get("type_changes", {})) + + for key, value in diff_values.items(): + if not key: # Not sure why, but it happens + continue + + key = key[5:] # Remove "root." prefix + + if "[" in key: + key = key.split("[", 1)[0] + + if "." in key: + key = key.split(".", 1)[0] + + if key in done: + continue + + new = value["new_value"] + old = value["old_value"] + + changes.append(f"**{key.title()}:** `{old}` **→** `{new}`") + + done.append(key) + + if not changes: + return + + message = "" + + for item in sorted(changes): + message += f"{Emojis.bullet} {item}\n" + + message = f"**{after.name}** (`{after.id}`)\n{message}" + + await self.send_log_message( + Icons.guild_update, Colour.blurple(), + "Guild updated", message, + thumbnail=after.icon_url_as(format="png") + ) + + @Cog.listener() + async def on_member_ban(self, guild: discord.Guild, member: discord.Member) -> None: + """Log ban event to user log.""" + if guild.id != GuildConstant.id: + return + + if member.id in self._ignored[Event.member_ban]: + self._ignored[Event.member_ban].remove(member.id) + return + + await self.send_log_message( + Icons.user_ban, Colours.soft_red, + "User banned", format_user(member), + thumbnail=member.avatar_url_as(static_format="png"), + channel_id=Channels.user_log + ) + + @Cog.listener() + async def on_member_join(self, member: discord.Member) -> None: + """Log member join event to user log.""" + if member.guild.id != GuildConstant.id: + return + + now = datetime.utcnow() + difference = abs(relativedelta(now, member.created_at)) + + message = format_user(member) + "\n\n**Account age:** " + humanize_delta(difference) + + if difference.days < 1 and difference.months < 1 and difference.years < 1: # New user account! + message = f"{Emojis.new} {message}" + + await self.send_log_message( + Icons.sign_in, Colours.soft_green, + "User joined", message, + thumbnail=member.avatar_url_as(static_format="png"), + channel_id=Channels.user_log + ) + + @Cog.listener() + async def on_member_remove(self, member: discord.Member) -> None: + """Log member leave event to user log.""" + if member.guild.id != GuildConstant.id: + return + + if member.id in self._ignored[Event.member_remove]: + self._ignored[Event.member_remove].remove(member.id) + return + + await self.send_log_message( + Icons.sign_out, Colours.soft_red, + "User left", format_user(member), + thumbnail=member.avatar_url_as(static_format="png"), + channel_id=Channels.user_log + ) + + @Cog.listener() + async def on_member_unban(self, guild: discord.Guild, member: discord.User) -> None: + """Log member unban event to mod log.""" + if guild.id != GuildConstant.id: + return + + if member.id in self._ignored[Event.member_unban]: + self._ignored[Event.member_unban].remove(member.id) + return + + await self.send_log_message( + Icons.user_unban, Colour.blurple(), + "User unbanned", format_user(member), + thumbnail=member.avatar_url_as(static_format="png"), + channel_id=Channels.mod_log + ) + + @staticmethod + def get_role_diff(before: t.List[discord.Role], after: t.List[discord.Role]) -> t.List[str]: + """Return a list of strings describing the roles added and removed.""" + changes = [] + before_roles = set(before) + after_roles = set(after) + + for role in (before_roles - after_roles): + changes.append(f"**Role removed:** {role.name} (`{role.id}`)") + + for role in (after_roles - before_roles): + changes.append(f"**Role added:** {role.name} (`{role.id}`)") + + return changes + + @Cog.listener() + async def on_member_update(self, before: discord.Member, after: discord.Member) -> None: + """Log member update event to user log.""" + if before.guild.id != GuildConstant.id: + return + + if before.id in self._ignored[Event.member_update]: + self._ignored[Event.member_update].remove(before.id) + return + + changes = self.get_role_diff(before.roles, after.roles) + + # The regex is a simple way to exclude all sequence and mapping types. + diff = DeepDiff(before, after, exclude_regex_paths=r".*\[.*") + + # A type change seems to always take precedent over a value change. Furthermore, it will + # include the value change along with the type change anyway. Therefore, it's OK to + # "overwrite" values_changed; in practice there will never even be anything to overwrite. + diff_values = {**diff.get("values_changed", {}), **diff.get("type_changes", {})} + + for attr, value in diff_values.items(): + if not attr: # Not sure why, but it happens. + continue + + attr = attr[5:] # Remove "root." prefix. + attr = attr.replace("_", " ").replace(".", " ").capitalize() + + new = value.get("new_value") + old = value.get("old_value") + + changes.append(f"**{attr}:** `{old}` **→** `{new}`") + + if not changes: + return + + message = "" + + for item in sorted(changes): + message += f"{Emojis.bullet} {item}\n" + + message = f"{format_user(after)}\n{message}" + + await self.send_log_message( + icon_url=Icons.user_update, + colour=Colour.blurple(), + title="Member updated", + text=message, + thumbnail=after.avatar_url_as(static_format="png"), + channel_id=Channels.user_log + ) + + @Cog.listener() + async def on_message_delete(self, message: discord.Message) -> None: + """Log message delete event to message change log.""" + channel = message.channel + author = message.author + + # Ignore DMs. + if not message.guild: + return + + if message.guild.id != GuildConstant.id or channel.id in GuildConstant.modlog_blacklist: + return + + self._cached_deletes.append(message.id) + + if message.id in self._ignored[Event.message_delete]: + self._ignored[Event.message_delete].remove(message.id) + return + + if author.bot: + return + + if channel.category: + response = ( + f"**Author:** {format_user(author)}\n" + f"**Channel:** {channel.category}/#{channel.name} (`{channel.id}`)\n" + f"**Message ID:** `{message.id}`\n" + "\n" + ) + else: + response = ( + f"**Author:** {format_user(author)}\n" + f"**Channel:** #{channel.name} (`{channel.id}`)\n" + f"**Message ID:** `{message.id}`\n" + "\n" + ) + + if message.attachments: + # Prepend the message metadata with the number of attachments + response = f"**Attachments:** {len(message.attachments)}\n" + response + + # Shorten the message content if necessary + content = message.clean_content + remaining_chars = 2040 - len(response) + + if len(content) > remaining_chars: + botlog_url = await self.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}" + + response += f"{content}" + + await self.send_log_message( + Icons.message_delete, Colours.soft_red, + "Message deleted", + response, + channel_id=Channels.message_log + ) + + @Cog.listener() + async def on_raw_message_delete(self, event: discord.RawMessageDeleteEvent) -> None: + """Log raw message delete event to message change log.""" + if event.guild_id != GuildConstant.id or event.channel_id in GuildConstant.modlog_blacklist: + return + + await asyncio.sleep(1) # Wait here in case the normal event was fired + + if event.message_id in self._cached_deletes: + # It was in the cache and the normal event was fired, so we can just ignore it + self._cached_deletes.remove(event.message_id) + return + + if event.message_id in self._ignored[Event.message_delete]: + self._ignored[Event.message_delete].remove(event.message_id) + return + + channel = self.bot.get_channel(event.channel_id) + + if channel.category: + response = ( + f"**Channel:** {channel.category}/#{channel.name} (`{channel.id}`)\n" + f"**Message ID:** `{event.message_id}`\n" + "\n" + "This message was not cached, so the message content cannot be displayed." + ) + else: + response = ( + f"**Channel:** #{channel.name} (`{channel.id}`)\n" + f"**Message ID:** `{event.message_id}`\n" + "\n" + "This message was not cached, so the message content cannot be displayed." + ) + + await self.send_log_message( + Icons.message_delete, Colours.soft_red, + "Message deleted", + response, + channel_id=Channels.message_log + ) + + @Cog.listener() + async def on_message_edit(self, msg_before: discord.Message, msg_after: discord.Message) -> None: + """Log message edit event to message change log.""" + if ( + not msg_before.guild + or msg_before.guild.id != GuildConstant.id + or msg_before.channel.id in GuildConstant.modlog_blacklist + or msg_before.author.bot + ): + return + + self._cached_edits.append(msg_before.id) + + if msg_before.content == msg_after.content: + return + + channel = msg_before.channel + channel_name = f"{channel.category}/#{channel.name}" if channel.category else f"#{channel.name}" + + # Getting the difference per words and group them by type - add, remove, same + # Note that this is intended grouping without sorting + diff = difflib.ndiff(msg_before.clean_content.split(), msg_after.clean_content.split()) + diff_groups = tuple( + (diff_type, tuple(s[2:] for s in diff_words)) + for diff_type, diff_words in itertools.groupby(diff, key=lambda s: s[0]) + ) + + content_before: t.List[str] = [] + content_after: t.List[str] = [] + + for index, (diff_type, words) in enumerate(diff_groups): + sub = ' '.join(words) + if diff_type == '-': + content_before.append(f"[{sub}](http://o.hi)") + elif diff_type == '+': + content_after.append(f"[{sub}](http://o.hi)") + elif diff_type == ' ': + if len(words) > 2: + sub = ( + f"{words[0] if index > 0 else ''}" + " ... " + f"{words[-1] if index < len(diff_groups) - 1 else ''}" + ) + content_before.append(sub) + content_after.append(sub) + + response = ( + f"**Author:** {format_user(msg_before.author)}\n" + f"**Channel:** {channel_name} (`{channel.id}`)\n" + f"**Message ID:** `{msg_before.id}`\n" + "\n" + f"**Before**:\n{' '.join(content_before)}\n" + f"**After**:\n{' '.join(content_after)}\n" + "\n" + f"[Jump to message]({msg_after.jump_url})" + ) + + if msg_before.edited_at: + # Message was previously edited, to assist with self-bot detection, use the edited_at + # datetime as the baseline and create a human-readable delta between this edit event + # and the last time the message was edited + timestamp = msg_before.edited_at + delta = humanize_delta(relativedelta(msg_after.edited_at, msg_before.edited_at)) + footer = f"Last edited {delta} ago" + else: + # Message was not previously edited, use the created_at datetime as the baseline, no + # delta calculation needed + timestamp = msg_before.created_at + footer = None + + await self.send_log_message( + Icons.message_edit, Colour.blurple(), "Message edited", response, + channel_id=Channels.message_log, timestamp_override=timestamp, footer=footer + ) + + @Cog.listener() + async def on_raw_message_edit(self, event: discord.RawMessageUpdateEvent) -> None: + """Log raw message edit event to message change log.""" + try: + channel = self.bot.get_channel(int(event.data["channel_id"])) + message = await channel.fetch_message(event.message_id) + except discord.NotFound: # Was deleted before we got the event + return + + if ( + not message.guild + or message.guild.id != GuildConstant.id + or message.channel.id in GuildConstant.modlog_blacklist + or message.author.bot + ): + return + + await asyncio.sleep(1) # Wait here in case the normal event was fired + + if event.message_id in self._cached_edits: + # It was in the cache and the normal event was fired, so we can just ignore it + self._cached_edits.remove(event.message_id) + return + + channel = message.channel + channel_name = f"{channel.category}/#{channel.name}" if channel.category else f"#{channel.name}" + + before_response = ( + f"**Author:** {format_user(message.author)}\n" + f"**Channel:** {channel_name} (`{channel.id}`)\n" + f"**Message ID:** `{message.id}`\n" + "\n" + "This message was not cached, so the message content cannot be displayed." + ) + + after_response = ( + f"**Author:** {format_user(message.author)}\n" + f"**Channel:** {channel_name} (`{channel.id}`)\n" + f"**Message ID:** `{message.id}`\n" + "\n" + f"{message.clean_content}" + ) + + await self.send_log_message( + Icons.message_edit, Colour.blurple(), "Message edited (Before)", + before_response, channel_id=Channels.message_log + ) + + await self.send_log_message( + Icons.message_edit, Colour.blurple(), "Message edited (After)", + after_response, channel_id=Channels.message_log + ) + + @Cog.listener() + async def on_voice_state_update( + self, + member: discord.Member, + before: discord.VoiceState, + after: discord.VoiceState + ) -> None: + """Log member voice state changes to the voice log channel.""" + if ( + member.guild.id != GuildConstant.id + or (before.channel and before.channel.id in GuildConstant.modlog_blacklist) + ): + return + + if member.id in self._ignored[Event.voice_state_update]: + self._ignored[Event.voice_state_update].remove(member.id) + return + + # Exclude all channel attributes except the name. + diff = DeepDiff( + before, + after, + exclude_paths=("root.session_id", "root.afk"), + exclude_regex_paths=r"root\.channel\.(?!name)", + ) + + # A type change seems to always take precedent over a value change. Furthermore, it will + # include the value change along with the type change anyway. Therefore, it's OK to + # "overwrite" values_changed; in practice there will never even be anything to overwrite. + diff_values = {**diff.get("values_changed", {}), **diff.get("type_changes", {})} + + icon = Icons.voice_state_blue + colour = Colour.blurple() + changes = [] + + for attr, values in diff_values.items(): + if not attr: # Not sure why, but it happens. + continue + + old = values["old_value"] + new = values["new_value"] + + attr = attr[5:] # Remove "root." prefix. + attr = VOICE_STATE_ATTRIBUTES.get(attr, attr.replace("_", " ").capitalize()) + + changes.append(f"**{attr}:** `{old}` **→** `{new}`") + + # Set the embed icon and colour depending on which attribute changed. + if any(name in attr for name in ("Channel", "deaf", "mute")): + if new is None or new is True: + # Left a channel or was muted/deafened. + icon = Icons.voice_state_red + colour = Colours.soft_red + elif old is None or old is True: + # Joined a channel or was unmuted/undeafened. + icon = Icons.voice_state_green + colour = Colours.soft_green + + if not changes: + return + + message = "\n".join(f"{Emojis.bullet} {item}" for item in sorted(changes)) + message = f"{format_user(member)}\n{message}" + + await self.send_log_message( + icon_url=icon, + colour=colour, + title="Voice state updated", + text=message, + thumbnail=member.avatar_url_as(static_format="png"), + channel_id=Channels.voice_log + ) + + +def setup(bot: Bot) -> None: + """Load the ModLog cog.""" + bot.add_cog(ModLog(bot)) |