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import asyncio
import contextlib
import logging
import socket
from traceback import format_exc
from typing import List, Optional
import async_timeout
import discord
from aiohttp import AsyncResolver, ClientSession, TCPConnector
from discord import DiscordException, Embed
from discord.ext import commands
from bot.constants import Channels, Client
log = logging.getLogger(__name__)
__all__ = ('SeasonalBot', 'bot')
class SeasonalBot(commands.Bot):
"""Base bot instance."""
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.http_session = ClientSession(
connector=TCPConnector(resolver=AsyncResolver(), family=socket.AF_INET)
)
def load_extensions(self, exts: List[str]) -> None:
"""Unload all current extensions, then load the given extensions."""
# Unload all cogs
extensions = list(self.extensions.keys())
for extension in extensions:
if extension != "bot.seasons": # We shouldn't unload the manager.
self.unload_extension(extension)
# Load in the list of cogs that was passed in here
for extension in exts:
cog = extension.split(".")[-1]
try:
self.load_extension(extension)
log.info(f'Successfully loaded extension: {cog}')
except Exception as e:
log.error(f'Failed to load extension {cog}: {repr(e)} {format_exc()}')
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 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
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
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()
async def set_username(self, new_name: str, nick_only: bool = False) -> Optional[bool]:
"""
Set the bot username and/or nickname to given new name.
Returns True/False based on success, or None if nickname fallback also failed.
"""
old_username = self.user.name
if nick_only:
return await self.set_nickname(new_name)
if old_username == new_name:
# since the username is correct, make sure nickname is removed
return await self.set_nickname()
log.debug(f"Changing username to {new_name}")
with contextlib.suppress(discord.HTTPException):
await bot.user.edit(username=new_name, nick=None)
if not new_name == self.member.display_name:
# name didn't change, try to changing nickname as fallback
if await self.set_nickname(new_name):
log.warning(f"Changing username failed, changed nickname instead.")
return False
log.warning(f"Changing username and nickname failed.")
return None
return 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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