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# Pyrogram - Telegram MTProto API Client Library for Python

# Copyright (C) 2017-present 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 Callable

import pyrogram

from pyrogram.filters import Filter

class OnMessage:

def on_message(

self=None,

filters=None,

group: int = 0

) -> Callable:

"""Decorator for handling new messages.

This does the same thing as :meth:`~pyrogram.Client.add_handler` using the

:obj:`~pyrogram.handlers.MessageHandler`.

Parameters:

filters (:obj:`~pyrogram.filters`, *optional*):

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

in your function.

group (``int``, *optional*):

The group identifier, defaults to 0.

"""

def decorator(func: Callable) -> Callable:

if isinstance(self, pyrogram.Client):

self.add_handler(pyrogram.handlers.MessageHandler(func, filters), group)

elif isinstance(self, Filter) or self is None:

if not hasattr(func, "handlers"):

func.handlers = []

func.handlers.append(

(

pyrogram.handlers.MessageHandler(func, self),

group if filters is None else filters

)

)

return func

return decorator