Add mark_chat_unread() method (#322)

* Add mark_chat_unread() method

* Add bound method for mark_chat_unread

* Update mark_chat_unread.py

* Update chat.py

Apply Dans suggested changes

* Update mark_chat_unread.py

* Update chat.py

* Update compiler.py

Co-authored-by: Dan <14043624+delivrance@users.noreply.github.com>

compiler/docs/compiler.py

@@ -216,6 +216,7 @@ def pyrogram_api():
             delete_channel
             delete_supergroup
             set_slow_mode
+            mark_chat_unread
         """,
         users="""
         Users
@@ -459,6 +460,7 @@ def pyrogram_api():
             Chat.add_members
             Chat.join
             Chat.leave
+            Chat.mark_unread
         """,
         user="""
         User

pyrogram/client/methods/chats/__init__.py

@@ -50,6 +50,7 @@ from .unarchive_chats import UnarchiveChats
 from .unban_chat_member import UnbanChatMember
 from .unpin_chat_message import UnpinChatMessage
 from .update_chat_username import UpdateChatUsername
+from .mark_chat_unread import MarkChatUnread
 
 
 class Chats(
@@ -86,6 +87,7 @@ class Chats(
     DeleteSupergroup,
     GetNearbyChats,
     SetAdministratorTitle,
-    SetSlowMode
+    SetSlowMode,
+    MarkChatUnread
 ):
     pass

pyrogram/client/methods/chats/mark_chat_unread.py

@@ -0,0 +1,45 @@
+#  Pyrogram - Telegram MTProto API Client Library for Python
+#  Copyright (C) 2017-2020 Dan <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
+
+from pyrogram.raw import functions
+from pyrogram.scaffold import Scaffold
+
+
+class MarkChatUnread(Scaffold):
+    async def mark_chat_unread(
+        self,
+        chat_id: Union[int, str],
+    ) -> bool:
+        """Mark a chat as unread.
+
+        Parameters:
+            chat_id (``int`` | ``str``):
+                Unique identifier (int) or username (str) of the target chat.
+
+        Returns:
+            ``bool``: On success, True is returned.
+        """
+
+        return await self.send(
+            functions.messages.MarkDialogUnread(
+                peer=await self.resolve_peer(chat_id),
+                unread=True
+            )
+        )