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EmoteManager/utils/misc.py

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2020-05-12 23:55:08 +00:00
# © 20182020 io mintz <io@mintz.cc>
#
# Emote Manager is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# Emote Manager is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Emote Manager. If not, see <https://www.gnu.org/licenses/>.
"""various utilities for use within the bot"""
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import asyncio
import discord
def format_user(bot, id, *, mention=False):
"""Format a user ID for human readable display."""
user = bot.get_user(id)
if user is None:
return f'Unknown user with ID {id}'
# not mention: @null byte#8191 (140516693242937345)
# mention: <@140516693242937345> (null byte#8191)
# this allows people to still see the username and discrim
# if they don't share a server with that user
if mention:
return f'{user.mention} (@{user})'
else:
return f'@{user} ({user.id})'
def format_http_exception(exception: discord.HTTPException):
"""Formats a discord.HTTPException for relaying to the user.
Sample return value:
BAD REQUEST (status code: 400):
Invalid Form Body
In image: File cannot be larger than 256 kb.
"""
return (
f'{exception.response.reason} (status code: {exception.response.status}):'
f'\n{exception.text}')
def strip_angle_brackets(string):
"""Strip leading < and trailing > from a string.
Useful if a user sends you a url like <this> to avoid embeds, or to convert emotes to reactions."""
if string.startswith('<') and string.endswith('>'):
return string[1:-1]
return string
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async def gather_or_cancel(*awaitables, loop=None):
"""run the awaitables in the sequence concurrently. If any of them raise an exception,
propagate the first exception raised and cancel all other awaitables.
"""
gather_task = asyncio.gather(*awaitables, loop=loop)
try:
return await gather_task
except asyncio.CancelledError:
raise
except:
gather_task.cancel()
raise