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add_handler.py
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# 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 typing import TYPE_CHECKING
from hydrogram.handlers import DisconnectHandler
if TYPE_CHECKING:
import hydrogram
from hydrogram.handlers.handler import Handler
class AddHandler:
def add_handler(self: "hydrogram.Client", handler: "Handler", group: int = 0):
"""Register an update handler.
You can register multiple handlers, but at most one handler within a group will be used for a single update.
To handle the same update more than once, register your handler using a different group id (lower group id
== higher priority). This mechanism is explained in greater details at
:doc:`More on Updates <../../topics/more-on-updates>`.
Parameters:
handler (``Handler``):
The handler to be registered.
group (``int``, *optional*):
The group identifier, defaults to 0.
Returns:
``tuple``: A tuple consisting of *(handler, group)*.
Example:
.. code-block:: python
from hydrogram import Client
from hydrogram.handlers import MessageHandler
async def hello(client, message):
print(message)
app = Client("my_account")
app.add_handler(MessageHandler(hello))
app.run()
"""
if isinstance(handler, DisconnectHandler):
self.disconnect_handler = handler.callback
else:
self.dispatcher.add_handler(handler, group)
return handler, group