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import avahi
import presence
from Buddy import *
from Service import *
SERVICE_ADDED = "service_added"
SERVICE_REMOVED = "service_removed"
BUDDY_JOIN = "buddy_join"
BUDDY_LEAVE = "buddy_leave"
class Group:
def __init__(self):
self._service_listeners = []
self._presence_listeners = []
def join(self, buddy):
pass
def add_service_listener(self, listener):
self._service_listeners.append(listener)
def add_presence_listener(self, listener):
self._presence_listeners.append(listener)
def _notify_service_added(self, service):
for listener in self._service_listeners:
listener(SERVICE_ADDED, buddy)
def _notify_service_removed(self, service):
for listener in self._service_listeners:
listener(SERVICE_REMOVED,buddy)
def _notify_buddy_join(self, buddy):
for listener in self._presence_listeners:
listener(BUDDY_JOIN, buddy)
def _notify_buddy_leave(self, buddy):
for listener in self._presence_listeners:
listener(BUDDY_LEAVE, buddy)
class LocalGroup(Group):
def __init__(self):
Group.__init__(self)
self._services = {}
self._buddies = {}
self._pdiscovery = presence.PresenceDiscovery()
self._pdiscovery.add_service_listener(self._on_service_change)
self._pdiscovery.start()
def get_owner(self):
return self._owner
def add_service(self, service):
sid = (service.get_name(), service.get_type())
self._services[sid] = service
self._notify_service_added(service)
def remove_service(self, sid):
self._notify_service_removed(service)
del self._services[sid]
def join(self):
self._owner = Owner(self)
self._owner.register()
def get_service(self, name, stype):
return self._services[(name, stype)]
def get_buddy(self, name):
return self._buddies[name]
def _add_buddy(self, buddy):
bid = buddy.get_nick_name()
if not self._buddies.has_key(bid):
self._buddies[bid] = buddy
self._notify_buddy_join(buddy)
def _remove_buddy(self, buddy):
self._notify_buddy_leave(buddy)
del self._buddies[buddy.get_nick_name()]
def _on_service_change(self, action, interface, protocol, name, stype, domain, flags):
if action == presence.ACTION_SERVICE_NEW:
self._pdiscovery.resolve_service(interface, protocol, name, stype, domain,
self._on_service_resolved)
elif action == presence.ACTION_SERVICE_REMOVED:
if stype == PRESENCE_SERVICE_TYPE:
self._remove_buddy(name)
elif stype.startswith("_olpc"):
self.remove_service((name, stype))
def _on_service_resolved(self, interface, protocol, name, stype, domain,
host, aprotocol, address, port, txt, flags):
service = Service(name, stype, address, port)
if stype == PRESENCE_SERVICE_TYPE:
self._add_buddy(Buddy(service, name))
elif stype.startswith("_olpc"):
self.add_service(service)
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