Implement Matrix->Telegram presence

mautrix_telegram/matrix.py

@@ -308,7 +308,10 @@ class MatrixHandler:
             await portal.mark_read(user, event_id)
 
     async def handle_presence(self, user: str, presence: str):
-        pass
+        user = await User.get_by_mxid(user).ensure_started()
+        if not await user.is_logged_in():
+            return
+        await user.set_presence(presence == "online")
 
     async def handle_typing(self, room_id: str, now_typing: List[str]):
         portal = Portal.get_by_mxid(room_id)

mautrix_telegram/user.py

@@ -22,6 +22,7 @@ import re
 from telethon.tl.types import *
 from telethon.tl.types.contacts import ContactsNotModified
 from telethon.tl.functions.contacts import GetContactsRequest, SearchRequest
+from telethon.tl.functions.account import UpdateStatusRequest
 from mautrix_appservice import MatrixRequestError
 
 from .db import User as DBUser, Contact as DBContact
@@ -188,6 +189,9 @@ class User(AbstractUser):
     def ensure_started(self, even_if_no_session=False) -> "Awaitable[User]":
         return super().ensure_started(even_if_no_session)
 
+    def set_presence(self, online: bool = True):
+        return self.client(UpdateStatusRequest(offline=not online))
+
     async def update_info(self, info: User = None):
         info = info or await self.client.get_me()
         changed = False