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import asyncio
import enum
import logging
import socket
from typing import Optional, Union
import async_timeout
import discord
from aiohttp import AsyncResolver, ClientSession, TCPConnector
from discord import DiscordException, Embed, Guild, User
from discord.ext import commands
from bot.constants import Channels, Client
from bot.utils.decorators import mock_in_debug
log = logging.getLogger(__name__)
__all__ = ("AssetType", "SeasonalBot", "bot")
class AssetType(enum.Enum):
"""
Discord media assets.
The values match exactly the kwarg keys that can be passed to `Guild.edit` or `User.edit`.
"""
banner = "banner"
avatar = "avatar"
server_icon = "icon"
class SeasonalBot(commands.Bot):
"""
Base bot instance.
While in debug mode, the asset upload methods (avatar, banner, ...) will not
perform the upload, and will instead only log the passed download urls and pretend
that the upload was successful. See the `mock_in_debug` decorator for further details.
"""
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.http_session = ClientSession(
connector=TCPConnector(resolver=AsyncResolver(), family=socket.AF_INET)
)
def add_cog(self, cog: commands.Cog) -> None:
"""
Delegate to super to register `cog`.
This only serves to make the info log, so that extensions don't have to.
"""
super().add_cog(cog)
log.info(f"Cog loaded: {cog.qualified_name}")
async def send_log(self, title: str, details: str = None, *, icon: str = None) -> None:
"""Send an embed message to the devlog channel."""
devlog = self.get_channel(Channels.devlog)
if not devlog:
log.warning("Log failed to send. Devlog channel not found.")
return
if not icon:
icon = self.user.avatar_url_as(format="png")
embed = Embed(description=details)
embed.set_author(name=title, icon_url=icon)
await devlog.send(embed=embed)
async def on_command_error(self, context: commands.Context, exception: DiscordException) -> None:
"""Check command errors for UserInputError and reset the cooldown if thrown."""
if isinstance(exception, commands.UserInputError):
context.command.reset_cooldown(context)
else:
await super().on_command_error(context, exception)
@property
def member(self) -> Optional[discord.Member]:
"""Retrieves the guild member object for the bot."""
guild = bot.get_guild(Client.guild)
if not guild:
return None
return guild.me
async def _apply_asset(self, target: Union[Guild, User], asset: AssetType, url: str) -> bool:
"""
Internal method for applying media assets to the guild or the bot.
This shouldn't be called directly. The purpose of this method is mainly generic
error handling to reduce needless code repetition.
Return True if upload was successful, False otherwise.
"""
log.info(f"Attempting to set {asset.name}: {url}")
kwargs = {asset.value: await self._fetch_image(url)}
try:
async with async_timeout.timeout(5):
await target.edit(**kwargs)
except asyncio.TimeoutError:
log.info("Asset upload timed out")
return False
except discord.HTTPException as discord_error:
log.exception("Asset upload failed", exc_info=discord_error)
return False
else:
log.info(f"Asset successfully applied")
return True
@mock_in_debug(return_value=True)
async def set_avatar(self, url: str) -> bool:
"""Sets the bot's avatar based on a URL."""
# Track old avatar hash for later comparison
old_avatar = bot.user.avatar
image = await self._fetch_image(url)
with contextlib.suppress(discord.HTTPException, asyncio.TimeoutError):
async with async_timeout.timeout(5):
await bot.user.edit(avatar=image)
if bot.user.avatar != old_avatar:
log.debug(f"Avatar changed to {url}")
return True
log.warning(f"Changing avatar failed: {url}")
return False
@mock_in_debug(return_value=True)
async def set_banner(self, url: str) -> bool:
"""Sets the guild's banner based on the provided `url`."""
guild = bot.get_guild(Client.guild)
old_banner = guild.banner
image = await self._fetch_image(url)
with contextlib.suppress(discord.HTTPException, asyncio.TimeoutError):
async with async_timeout.timeout(5):
await guild.edit(banner=image)
new_banner = bot.get_guild(Client.guild).banner
if new_banner != old_banner:
log.debug(f"Banner changed to {url}")
return True
log.warning(f"Changing banner failed: {url}")
return False
@mock_in_debug(return_value=True)
async def set_icon(self, url: str) -> bool:
"""Sets the guild's icon based on a URL."""
guild = bot.get_guild(Client.guild)
# Track old icon hash for later comparison
old_icon = guild.icon
image = await self._fetch_image(url)
with contextlib.suppress(discord.HTTPException, asyncio.TimeoutError):
async with async_timeout.timeout(5):
await guild.edit(icon=image)
new_icon = bot.get_guild(Client.guild).icon
if new_icon != old_icon:
log.debug(f"Icon changed to {url}")
return True
log.warning(f"Changing icon failed: {url}")
return False
async def _fetch_image(self, url: str) -> bytes:
"""Retrieve an image based on a URL."""
log.debug(f"Getting image from: {url}")
async with self.http_session.get(url) as resp:
return await resp.read()
@mock_in_debug(return_value=True)
async def set_nickname(self, new_name: str = None) -> bool:
"""Set the bot nickname in the main guild."""
old_display_name = self.member.display_name
if old_display_name == new_name:
return False
log.debug(f"Changing nickname to {new_name}")
with contextlib.suppress(discord.HTTPException):
await self.member.edit(nick=new_name)
return not old_display_name == self.member.display_name
bot = SeasonalBot(command_prefix=Client.prefix)
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