# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2019 Dan Tès <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 .handler import Handler


class UserStatusHandler(Handler):
    """The UserStatus handler class. Used to handle user status updates (user going online or offline).
    It is intended to be used with :meth:`add_handler() <pyrogram.Client.add_handler>`

    For a nicer way to register this handler, have a look at the
    :meth:`on_user_status() <pyrogram.Client.on_user_status>` decorator.

    Args:
        callback (``callable``):
            Pass a function that will be called when a new UserStatus update arrives. It takes *(client, user_status)*
            as positional arguments (look at the section below for a detailed description).

        filters (:obj:`Filters <pyrogram.Filters>`):
            Pass one or more filters to allow only a subset of messages to be passed
            in your callback function.

    Other parameters:
        client (:obj:`Client <pyrogram.Client>`):
            The Client itself, useful when you want to call other API methods inside the user status handler.

        user_status (:obj:`UserStatus <pyrogram.UserStatus>`):
            The received UserStatus update.
    """

    def __init__(self, callback: callable, filters=None):
        super().__init__(callback, filters)

    def check(self, user_status):
        return (
            self.filters(user_status)
            if callable(self.filters)
            else True
        )