# Hydrogram - Telegram MTProto API Client Library for Python

# Copyright (C) 2017-2023 Dan <https://github.com/delivrance>

# Copyright (C) 2023-present Hydrogram <https://hydrogram.org>

#

# This file is part of Hydrogram.

#

# Hydrogram 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.

#

# Hydrogram 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 Hydrogram. If not, see <http://www.gnu.org/licenses/>.

from __future__ import annotations

from typing import TYPE_CHECKING, Callable

import hydrogram

from .handler import Handler

if TYPE_CHECKING:

import hydrogram

from hydrogram.filters import Filter

from hydrogram.types import Message

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:`~hydrogram.Client.add_handler`

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

:meth:`~hydrogram.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:`~hydrogram.Client`):

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

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

The deleted messages, as list.

"""

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

super().__init__(callback, filters)

async def check(self, client: hydrogram.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

return False