Refactor the buddy list handling somewhat

chat/BuddyList.py

@@ -0,0 +1,84 @@
+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)
+

chat/chat.glade

@@ -83,7 +83,7 @@
 	  <property name="spacing">0</property>
 
 	  <child>
-	    <widget class="GtkTreeView" id="buddyList">
+	    <widget class="GtkTreeView" id="buddyListView">
 	      <property name="border_width">2</property>
 	      <property name="width_request">167</property>
 	      <property name="visible">True</property>

chat/main.py

@@ -8,14 +8,16 @@ from SimpleGladeApp import SimpleGladeApp
 import presence
 import network
 import avahi
+import BuddyList
 
 glade_dir = os.getcwd()
 
 class ChatApp(SimpleGladeApp):
 	def __init__(self, glade_file="chat.glade", root="mainWindow", domain=None, **kwargs):
 
-		self._pdiscovery = presence.PresenceDiscovery()
 		self._pannounce = presence.PresenceAnnounce()
+		self._buddy_list = BuddyList.BuddyList()
+		self._buddy_list.add_buddy_listener(self._on_buddy_presence_event)
 
 		(self._nick, self._realname) = self._get_name()
 
@@ -33,22 +35,26 @@ class ChatApp(SimpleGladeApp):
 			realname = "Some Clueless User"
 		return (nick, realname)
 
-	def new_service(self, action, interface, protocol, name, stype, domain, flags):
-		if action != 'added' or stype != presence.OLPC_CHAT_SERVICE:
-			return
-		self._pdiscovery.resolve_service(interface, protocol, name, stype, domain, self.service_resolved)
-
-	def on_buddyList_buddy_selected(self, widget, *args):
+	def _on_buddyList_buddy_selected(self, widget, *args):
 		(model, aniter) = widget.get_selection().get_selected()
 		name = self.treemodel.get(aniter,0)
 		print "Selected %s" % name
 
-	def on_buddyList_buddy_double_clicked(self, widget, *args):
+	def _on_buddyList_buddy_double_clicked(self, widget, *args):
 		(model, aniter) = widget.get_selection().get_selected()
 		name = self.treemodel.get(aniter,0)
 		print "Double-clicked %s" % name
 
-	def on_main_window_delete(self, widget, *args):
+	def _on_buddy_presence_event(self, action, buddy):
+		if action == BuddyList.ACTION_BUDDY_ADDED:
+			aniter = self.treemodel.insert_after(None,None)
+			self.treemodel.set(aniter, 0, buddy.nick())
+		elif action == BuddyList.ACCTION_BUDDY_REMOVED:
+			aniter = self.treemodel.get_iter(buddy.nick())
+			if aniter:
+				self.treemodel.remove(iter)
+
+	def _on_main_window_delete(self, widget, *args):
 		self.quit()
 
 	def _recv_group_message(self, msg):
@@ -62,31 +68,15 @@ class ChatApp(SimpleGladeApp):
 			self._gc_controller.send_msg(text)
 		widget.set_text("")	
 
-	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 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))
-		if len(data) > 0 and 'name' in data.keys():
-			aniter = self.treemodel.insert_after(None,None)
-			self.treemodel.set(aniter, 0, data['name'])
-
 	def new(self):
 		self._group_chat_buffer = gtk.TextBuffer()
 		self.chatView.set_buffer(self._group_chat_buffer)
 
 		self.treemodel = gtk.TreeStore(gobject.TYPE_STRING)
-		self.buddyList.set_model(self.treemodel)
-		self.buddyList.connect("cursor-changed", self.on_buddyList_buddy_selected)
-		self.buddyList.connect("row-activated", self.on_buddyList_buddy_double_clicked)
-		self.mainWindow.connect("delete-event", self.on_main_window_delete)
+		self.buddyListView.set_model(self.treemodel)
+		self.buddyListView.connect("cursor-changed", self._on_buddyList_buddy_selected)
+		self.buddyListView.connect("row-activated", self._on_buddyList_buddy_double_clicked)
+		self.mainWindow.connect("delete-event", self._on_main_window_delete)
 		self.entry.connect("activate", self._send_group_message)
 
 		renderer = gtk.CellRendererText()
@@ -94,11 +84,10 @@ class ChatApp(SimpleGladeApp):
 		column.set_resizable(True)
 		column.set_sizing("GTK_TREE_VIEW_COLUMN_GROW_ONLY");
 		column.set_expand(True);
-		self.buddyList.append_column(column)
+		self.buddyListView.append_column(column)
 
-		self._pannounce.register_service(self._realname, 6666, presence.OLPC_CHAT_SERVICE, name=self._nick)
-		self._pdiscovery.add_service_listener(self.new_service)
-		self._pdiscovery.start()
+		self._pannounce.register_service(self._realname, 6666, presence.OLPC_CHAT_SERVICE,
+				name = self._nick, realname = self._realname)
 
 		self._gc_controller = network.GroupChatController('224.0.0.221', 6666, self._recv_group_message)
 		self._gc_controller.start()

chat/presence.py

@@ -1,10 +1,9 @@
-#!/usr/bin/python -t
-
-
 import avahi, dbus, dbus.glib
 
 OLPC_CHAT_SERVICE = "_olpc_chat._udp"
 
+ACTION_SERVICE_NEW = 'new'
+ACTION_SERVICE_REMOVED = 'removed'
 
 class PresenceDiscovery(object):
 	def __init__(self):
@@ -33,15 +32,13 @@ class PresenceDiscovery(object):
 
 	def new_service(self, interface, protocol, name, stype, domain, flags):
 #		print "Found service '%s' (%d) of type '%s' in domain '%s' on %i.%i." % (name, flags, stype, domain, interface, protocol)
-
 		for listener in self._service_listeners:
-			listener('added', interface, protocol, name, stype, domain, flags)
+			listener(ACTION_SERVICE_NEW, interface, protocol, name, stype, domain, flags)
 
 	def remove_service(self, interface, protocol, name, stype, domain, flags):
 #		print "Service '%s' of type '%s' in domain '%s' on %i.%i disappeared." % (name, stype, domain, interface, protocol)
-
 		for listener in self._service_listeners:
-			listener('removed', interface, protocol, name, stype, domain, flags)
+			listener(ACTION_SERVICE_REMOVED, interface, protocol, name, stype, domain, flags)
  
 	def new_service_type(self, interface, protocol, stype, domain, flags):
 		# Are we already browsing this domain for this type?