import asyncio
from datetime import timedelta
from typing import List, Iterable, Union, TYPE_CHECKING, Dict, Optional
import discord
if TYPE_CHECKING:
from ..bot import Red
from ..commands import Context
__all__ = (
"mass_purge",
"slow_deletion",
"get_audit_reason",
"is_mod_or_superior",
"strfdelta",
"is_admin_or_superior",
"check_permissions",
)
[docs]async def mass_purge(
messages: List[discord.Message],
channel: Union[
discord.TextChannel, discord.VoiceChannel, discord.StageChannel, discord.Thread
],
*,
reason: Optional[str] = None,
):
"""Bulk delete messages from a channel.
If more than 100 messages are supplied, the bot will delete 100 messages at
a time, sleeping between each action.
Note
----
Messages must not be older than 14 days, and the bot must not be a user
account.
Parameters
----------
messages : `list` of `discord.Message`
The messages to bulk delete.
channel : `discord.TextChannel`, `discord.VoiceChannel`, `discord.StageChannel`, or `discord.Thread`
The channel to delete messages from.
reason : `str`, optional
The reason for bulk deletion, which will appear in the audit log.
Raises
------
discord.Forbidden
You do not have proper permissions to delete the messages or you’re not
using a bot account.
discord.HTTPException
Deleting the messages failed.
"""
while messages:
# discord.NotFound can be raised when `len(messages) == 1` and the message does not exist.
# As a result of this obscure behavior, this error needs to be caught just in case.
try:
await channel.delete_messages(messages[:100], reason=reason)
except discord.errors.HTTPException:
pass
messages = messages[100:]
await asyncio.sleep(1.5)
[docs]async def slow_deletion(messages: Iterable[discord.Message]):
"""Delete a list of messages one at a time.
Any exceptions raised when trying to delete the message will be silenced.
Parameters
----------
messages : `iterable` of `discord.Message`
The messages to delete.
"""
for message in messages:
try:
await message.delete()
except discord.HTTPException:
pass
[docs]def get_audit_reason(author: discord.Member, reason: str = None, *, shorten: bool = False):
"""Construct a reason to appear in the audit log.
Parameters
----------
author : discord.Member
The author behind the audit log action.
reason : str
The reason behind the audit log action.
shorten : bool
When set to ``True``, the returned audit reason string will be
shortened to fit the max length allowed by Discord audit logs.
Returns
-------
str
The formatted audit log reason.
"""
audit_reason = (
"Action requested by {} (ID {}). Reason: {}".format(author, author.id, reason)
if reason
else "Action requested by {} (ID {}).".format(author, author.id)
)
if shorten and len(audit_reason) > 512:
audit_reason = f"{audit_reason[:509]}..."
return audit_reason
[docs]async def is_mod_or_superior(
bot: "Red", obj: Union[discord.Message, discord.Member, discord.Role]
):
"""Check if an object has mod or superior permissions.
If a message is passed, its author's permissions are checked. If a role is
passed, it simply checks if it is one of either the admin or mod roles.
Parameters
----------
bot : redbot.core.bot.Red
The bot object.
obj : `discord.Message` or `discord.Member` or `discord.Role`
The object to check permissions for.
Returns
-------
bool
:code:`True` if the object has mod permissions.
Raises
------
TypeError
If the wrong type of ``obj`` was passed.
"""
if isinstance(obj, discord.Message):
user = obj.author
elif isinstance(obj, discord.Member):
user = obj
elif isinstance(obj, discord.Role):
gid = obj.guild.id
if obj in await bot.get_admin_role_ids(gid):
return True
if obj in await bot.get_mod_role_ids(gid):
return True
return False
else:
raise TypeError("Only messages, members or roles may be passed")
if await bot.is_owner(user):
return True
if await bot.is_mod(user):
return True
return False
[docs]def strfdelta(delta: timedelta):
"""Format a timedelta object to a message with time units.
Parameters
----------
delta : datetime.timedelta
The duration to parse.
Returns
-------
str
A message representing the timedelta with units.
"""
s = []
if delta.days:
ds = "%i day" % delta.days
if delta.days > 1:
ds += "s"
s.append(ds)
hrs, rem = divmod(delta.seconds, 60 * 60)
if hrs:
hs = "%i hr" % hrs
if hrs > 1:
hs += "s"
s.append(hs)
mins, secs = divmod(rem, 60)
if mins:
s.append("%i min" % mins)
if secs:
s.append("%i sec" % secs)
return " ".join(s)
[docs]async def is_admin_or_superior(
bot: "Red", obj: Union[discord.Message, discord.Member, discord.Role]
):
"""Same as `is_mod_or_superior` except for admin permissions.
If a message is passed, its author's permissions are checked. If a role is
passed, it simply checks if it is the admin role.
Parameters
----------
bot : redbot.core.bot.Red
The bot object.
obj : `discord.Message` or `discord.Member` or `discord.Role`
The object to check permissions for.
Returns
-------
bool
:code:`True` if the object has admin permissions.
Raises
------
TypeError
If the wrong type of ``obj`` was passed.
"""
if isinstance(obj, discord.Message):
user = obj.author
elif isinstance(obj, discord.Member):
user = obj
elif isinstance(obj, discord.Role):
return obj.id in await bot.get_admin_role_ids(obj.guild.id)
else:
raise TypeError("Only messages, members or roles may be passed")
if await bot.is_owner(user):
return True
if await bot.is_admin(user):
return True
return False
[docs]async def check_permissions(ctx: "Context", perms: Dict[str, bool]) -> bool:
"""Check if the author has required permissions.
This will always return ``True`` if the author is a bot owner, or
has the ``administrator`` permission. If ``perms`` is empty, this
will only check if the user is a bot owner.
Parameters
----------
ctx : Context
The command invocation context to check.
perms : Dict[str, bool]
A dictionary mapping permissions to their required states.
Valid permission names are those listed as properties of
the `discord.Permissions` class.
Returns
-------
bool
``True`` if the author has the required permissions.
"""
if await ctx.bot.is_owner(ctx.author):
return True
elif not perms:
return False
resolved = ctx.permissions
return resolved.administrator or all(
getattr(resolved, name, None) == value for name, value in perms.items()
)
