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# Pyrogram - Telegram MTProto API Client Library for Python

# 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 List, Callable

import pyrogram

from pyrogram.filters import Filter

from pyrogram.types import Message

from .handler import Handler

class DeletedMessagesHandler(Handler):

"""The deleted messages handler class. Used to handle deleted messages coming from any chat

(private, group, channel). It is intended to be used with :meth:`~pyrogram.Client.add_handler`

For a nicer way to register this handler, have a look at the

:meth:`~pyrogram.Client.on_deleted_messages` decorator.

Parameters:

callback (``Callable``):

Pass a function that will be called when one or more messages have been deleted.

It takes *(client, messages)* as positional arguments (look at the section below for a detailed description).

filters (:obj:`Filters`):

Pass one or more filters to allow only a subset of messages to be passed

in your callback function.

Other parameters:

client (:obj:`~pyrogram.Client`):

The Client itself, useful when you want to call other API methods inside the message handler.

messages (List of :obj:`~pyrogram.types.Message`):

The deleted messages, as list.

"""

def __init__(self, callback: Callable, filters: Filter = None):

super().__init__(callback, filters)

async def check(self, client: "pyrogram.Client", messages: List[Message]):

# Every message should be checked, if at least one matches the filter True is returned

# otherwise, or if the list is empty, False is returned

for message in messages:

if await super().check(client, message):

return True

else:

return False

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