Handler for "m.room.member" event

matrix_client/client.py

@@ -443,6 +443,13 @@ def _process_state_event(self, state_event, current_room):
             current_room.topic = state_event["content"].get("topic", None)
         elif etype == "m.room.aliases":
             current_room.aliases = state_event["content"].get("aliases", None)
+        elif etype == "m.room.member":
+            if state_event["content"]["membership"] == "join":
+                current_room._mkmembers(
+                    User(self.api,
+                         state_event["state_key"],
+                         state_event["content"].get("displayname", None))
+                )
 
         for listener in current_room.state_listeners:
             if (

matrix_client/room.py

@@ -515,7 +515,8 @@ def get_joined_members(self):
         return self._members
 
     def _mkmembers(self, member):
-        self._members.append(member)
+        if member.user_id not in [x.user_id for x in self._members]:
+            self._members.append(member)
 
     def backfill_previous_messages(self, reverse=False, limit=10):
         """Backfill handling of previous messages.

test/client_test.py

@@ -97,6 +97,14 @@ def test_state_event():
     client._process_state_event(ev, room)
     assert room.aliases is aliases
 
+    # test member event
+    ev["type"] = "m.room.member"
+    ev["content"] = {'membership': 'join', 'displayname': 'stereo'}
+    ev["state_key"] = "@stereo:xxx.org"
+    client._process_state_event(ev, room)
+    assert len(room._members) == 1
+    assert room._members[0].user_id == "@stereo:xxx.org"
+
 
 def test_get_user():
     client = MatrixClient("http://example.com")