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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:
services = ps_activity.get_services_of_type(ActivityChat.SERVICE_TYPE)
if len(services) > 0:
self._service_appeared_cb(self._pservice, services[0])
def _service_appeared_cb(self, pservice, 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, address=addr, port=port)
self._setup_stream(self._chat_service)
def share(self):
"""Only called when we share 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)
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