1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
import avahi
from Buddy import Buddy
from Buddy import Owner
from Buddy import PRESENCE_SERVICE_TYPE
from Service import Service
from sugar.p2p.model.Store import Store
import presence
class Group:
SERVICE_ADDED = "service_added"
SERVICE_REMOVED = "service_removed"
BUDDY_JOIN = "buddy_join"
BUDDY_LEAVE = "buddy_leave"
def __init__(self):
self._service_listeners = []
self._presence_listeners = []
self._store = Store(self)
def get_store(self):
return self._store
def join(self):
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(Group.SERVICE_ADDED, service)
def _notify_service_removed(self, service_id):
for listener in self._service_listeners:
listener(Group.SERVICE_REMOVED, service_id)
def _notify_buddy_join(self, buddy):
for listener in self._presence_listeners:
listener(Group.BUDDY_JOIN, buddy)
def _notify_buddy_leave(self, buddy):
for listener in self._presence_listeners:
listener(Group.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()
self._owner = Owner(self)
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, service_id):
self._notify_service_removed(service_id)
del self._services[service_id]
def join(self):
self._owner.register()
def get_service(self, name, stype):
if self._services.has_key((name, stype)):
return self._services[(name, stype)]
else:
return None
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, port)
service.set_address(address)
for prop in avahi.txt_array_to_string_array(txt):
(key, value) = prop.split('=')
if key == 'group_address':
service.set_group_address(value)
if stype == PRESENCE_SERVICE_TYPE:
self._add_buddy(Buddy(service, name))
elif stype.startswith("_olpc"):
self.add_service(service)
|
