def METHOD_NAME(data, only_newcomer=False):
    room, room_id = _get_room_from_data(data)
    rooms_data[room_id] = _update_room_playing_status(data, room)
    event_data = {"only_newcomer": only_newcomer, **rooms_data[room_id]}
    emit("preview-room:room-updated", event_data, room=room_id)