fix: pass through correct disconnect reason

Author: davidzhao

examples/publish_hue.py

@@ -27,6 +27,13 @@ async def main(room: rtc.Room):
         )
         .to_jwt()
     )
+
+    @room.on("participant_disconnected")
+    def on_participant_disconnected(participant: rtc.Participant):
+        logging.info(
+            f"participant {participant.identity} disconnected, reason: {rtc.DisconnectReason.Name(participant.disconnect_reason)}"
+        )
+
     url = os.getenv("LIVEKIT_URL")
     logging.info("connecting to %s", url)
     try:

livekit-rtc/livekit/rtc/room.py

@@ -511,6 +511,9 @@ def _on_room_event(self, event: proto_room.RoomEvent):
         elif which == "participant_disconnected":
             identity = event.participant_disconnected.participant_identity
             rparticipant = self._remote_participants.pop(identity)
+            rparticipant._info.disconnect_reason = (
+                event.participant_disconnected.disconnect_reason
+            )
             self.emit("participant_disconnected", rparticipant)
         elif which == "local_track_published":
             sid = event.local_track_published.track_sid