Add pin_chat_message method

pyrogram/client/methods/chats/__init__.py

@@ -23,6 +23,7 @@ from .get_chat_members import GetChatMembers
 from .join_chat import JoinChat
 from .kick_chat_member import KickChatMember
 from .leave_chat import LeaveChat
+from .pin_chat_message import PinChatMessage
 from .promote_chat_member import PromoteChatMember
 from .restrict_chat_member import RestrictChatMember
 from .set_chat_description import SetChatDescription
@@ -44,6 +45,7 @@ class Chats(
     SetChatPhoto,
     DeleteChatPhoto,
     SetChatTitle,
-    SetChatDescription
+    SetChatDescription,
+    PinChatMessage
 ):
     pass

pyrogram/client/methods/chats/pin_chat_message.py

@@ -0,0 +1,41 @@
+# Pyrogram - Telegram MTProto API Client Library for Python
+# Copyright (C) 2017-2018 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 pyrogram.api import functions, types
+from ...ext import BaseClient
+
+
+class PinChatMessage(BaseClient):
+    def pin_chat_message(self, chat_id: int or str, message_id: int, disable_notification: bool = None):
+        # TODO: Docstrings
+        peer = self.resolve_peer(chat_id)
+
+        if isinstance(peer, types.InputPeerChannel):
+            self.send(
+                functions.channels.UpdatePinnedMessage(
+                    channel=peer,
+                    id=message_id,
+                    silent=disable_notification or None
+                )
+            )
+        elif isinstance(peer, types.InputPeerChat):
+            raise ValueError("The chat_id \"{}\" belongs to a basic group".format(chat_id))
+        else:
+            raise ValueError("The chat_id \"{}\" belongs to a user".format(chat_id))
+
+        return True