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# 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/>.
import pyrogram
from pyrogram.api import functions, types
from ...ext import BaseClient
class JoinChat(BaseClient):
def join_chat(self, chat_id: str):
"""Use this method to join a group chat or channel.
Args:
chat_id (``str``):
Unique identifier for the target chat in form of a *t.me/joinchat/* link or username of the target
channel/supergroup (in the format @username).
Returns:
On success, a :obj:`Chat <pyrogram.Chat>` object is returned.
Raises:
:class:`Error <pyrogram.Error>` in case of a Telegram RPC error.
"""
match = self.INVITE_LINK_RE.match(chat_id)
if match:
chat = self.send(functions.messages.ImportChatInvite(hash=match.group(1)))
if isinstance(chat.chats[0], types.Chat):
return pyrogram.Chat._parse_chat_chat(self, chat.chats[0])
elif isinstance(chat.chats[0], types.Channel):
return pyrogram.Chat._parse_channel_chat(self, chat.chats[0])
else:
resolved_peer = self.send(functions.contacts.ResolveUsername(username=chat_id.lower().strip("@")))
channel = types.InputPeerChannel(
channel_id=resolved_peer.chats[0].id, access_hash=resolved_peer.chats[0].access_hash
)
chat = self.send(functions.channels.JoinChannel(channel=channel))
return pyrogram.Chat._parse_channel_chat(self, chat.chats[0])