import logging from sugar.chat.GroupChat import GroupChat class ActivityChat(GroupChat): SERVICE_TYPE = "_olpc_activity_chat._udp" def __init__(self, activity): GroupChat.__init__(self) self._chat_service = None self._activity = activity self._pservice.register_service_type(ActivityChat.SERVICE_TYPE) self._pservice.connect('service-appeared', self._service_appeared_cb) # Find an existing activity chat to latch onto ps_activity = self._pservice.get_activity(activity.get_id()) if ps_activity is not None: service = ps_activity.get_service_of_type(ActivityChat.SERVICE_TYPE) if service is not None: self._service_appeared_cb(self._pservice, None, service) def _service_appeared_cb(self, pservice, buddy, service): if service.get_activity_id() != self._activity.get_id(): return if service.get_type() != ActivityChat.SERVICE_TYPE: return if self._chat_service: return logging.debug('Activity chat service appeared, setup the stream.') # Ok, there's an existing chat service that we copy # parameters and such from addr = service.get_address() port = service.get_port() self._chat_service = self._pservice.share_activity(self._activity, stype=ActivityChat.SERVICE_TYPE, properties=None, address=addr, port=port) self._setup_stream(self._chat_service) def publish(self): """Only called when we publish the activity this chat is tied to.""" self._chat_service = self._pservice.share_activity(self._activity, stype=ActivityChat.SERVICE_TYPE) self._setup_stream(self._chat_service)