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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/>.
from typing import Union
import pyrogram
from pyrogram.api import functions, types
from ...ext import BaseClient
class GetChat(BaseClient):
def get_chat(
self,
chat_id: Union[int, str]
) -> "pyrogram.Chat":
"""Use this method to get up to date information about the chat.
Information include current name of the user for one-on-one conversations, current username of a user, group or
channel, etc.
Parameters:
chat_id (``int`` | ``str``):
Unique identifier (int) or username (str) of the target chat.
Unique identifier for the target chat in form of a *t.me/joinchat/* link, identifier (int) or username
of the target channel/supergroup (in the format @username).
Returns:
:obj:`Chat`: On success, a chat object is returned.
Raises:
RPCError: In case of a Telegram RPC error.
ValueError: In case the chat invite link points to a chat you haven't joined yet.
"""
match = self.INVITE_LINK_RE.match(str(chat_id))
if match:
h = match.group(1)
r = self.send(
functions.messages.CheckChatInvite(
hash=h
)
)
if isinstance(r, types.ChatInvite):
raise ValueError("You haven't joined \"t.me/joinchat/{}\" yet".format(h))
self.fetch_peers([r.chat])
if isinstance(r.chat, types.Chat):
chat_id = -r.chat.id
if isinstance(r.chat, types.Channel):
chat_id = int("-100" + str(r.chat.id))
peer = self.resolve_peer(chat_id)
if isinstance(peer, types.InputPeerChannel):
r = self.send(functions.channels.GetFullChannel(channel=peer))
elif isinstance(peer, (types.InputPeerUser, types.InputPeerSelf)):
r = self.send(functions.users.GetFullUser(id=peer))
else:
r = self.send(functions.messages.GetFullChat(chat_id=peer.chat_id))
return pyrogram.Chat._parse_full(self, r)