# Pyrogram - Telegram MTProto API Client Library for Python

# Copyright (C) 2017-2020 Dan <https://github.com/delivrance>

#

# This file is part of Pyrogram.

#

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# Pyrogram 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 Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

from typing import Union

from pyrogram import raw

from pyrogram.scaffold import Scaffold

class DeleteUserHistory(Scaffold):

async def delete_user_history(

self,

chat_id: Union[int, str],

user_id: Union[int, str],

) -> bool:

"""Delete all messages sent by a certain user in a supergroup.

Parameters:

chat_id (``int`` | ``str``):

Unique identifier (int) or username (str) of the target chat.

user_id (``int`` | ``str``):

Unique identifier (int) or username (str) of the user whose messages will be deleted.

Returns:

``bool``: True on success, False otherwise.

"""

r = await self.send(

raw.functions.channels.DeleteUserHistory(

channel=await self.resolve_peer(chat_id),

user_id=await self.resolve_peer(user_id)

)

)

# Deleting messages you don't have right onto won't raise any error.

# Check for pts_count, which is 0 in case deletes fail.

return bool(r.pts_count)