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import presence
import avahi
ACTION_BUDDY_ADDED = "added"
ACTION_BUDDY_REMOVED = "removed"
class Buddy(object):
def __init__(self, nick, realname, servicename, key=None):
self._nick = nick
self._realname = realname
self._servicename = servicename
self._key = key
def nick(self):
return self._nick
def realname(self):
return self._realname
def servicename(self):
return self._servicename
def key(self):
return self._key
class BuddyList(object):
""" Manage a list of buddies """
def __init__(self):
self._listeners = []
self._buddies = {}
self._pdiscovery = presence.PresenceDiscovery()
self._pdiscovery.add_service_listener(self._on_service_change)
self._pdiscovery.start()
def add_buddy_listener(self, listener):
self._listeners.append(listener)
def _add_buddy(self, host, address, servicename, data):
if len(data) > 0 and 'name' in data.keys():
buddy = Buddy(data['name'], data['realname'], servicename)
self._buddies[data['name']] = buddy
self._notify_listeners(ACTION_BUDDY_ADDED, buddy)
def _remove_buddy(self, buddy):
nick = buddy.nick()
self._notify_listeners(ACTION_BUDDY_REMOVED, buddy)
del self._buddies[nick]
def _find_buddy_by_service_name(self, servicename):
for buddy in self._buddies.keys():
if buddy.servicename() == servicename:
return buddy
return None
def _notify_listeners(self, action, buddy):
for listener in self._listeners:
listener(action, buddy)
def _on_service_change(self, action, interface, protocol, name, stype, domain, flags):
if stype != presence.OLPC_CHAT_SERVICE:
return
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:
buddy = self._find_buddy_by_service_name(name)
if buddy:
self._remove_buddy(buddy)
def _pair_to_dict(self, l):
res = {}
for el in l:
tmp = el.split('=', 1)
if len(tmp) > 1:
res[tmp[0]] = tmp[1]
else:
res[tmp[0]] = ''
return res
def _on_service_resolved(self, interface, protocol, name, stype, domain, host, aprotocol, address, port, txt, flags):
data = self._pair_to_dict(avahi.txt_array_to_string_array(txt))
self._add_buddy(host, address, name, data)
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