Do not set up the owner of the presence service if there

is no nick name in the env. I'm not sure this is the best
approach, we need to figure it out.

First go at the new simulator.

sugar/Makefile.am

@@ -8,6 +8,7 @@ sugar_PYTHON =				\
 	logger.py			\
 	setup.py			\
 	oldsimulator.py			\
+	simulator.py			\
 	TracebackUtils.py		\
 	util.py
 

sugar/env.py

@@ -14,10 +14,16 @@ def setup_user(profile):
 	os.environ['SUGAR_COLOR'] = profile.get_color().to_string()
 
 def get_nick_name():
-	return os.environ['SUGAR_NICK_NAME']
+	if os.environ.has_key('SUGAR_NICK_NAME'):
+		return os.environ['SUGAR_NICK_NAME']
+	else:
+		return None
 
 def get_color():
-	return os.environ['SUGAR_COLOR']
+	if os.environ.has_key('SUGAR_COLOR'):
+		return os.environ['SUGAR_COLOR']
+	else:
+		return None
 
 def setup_python_path():
 	for path in sugar_python_path:

sugar/simulator.py

@@ -0,0 +1,47 @@
+from sugar.presence import PresenceService
+from sugar.graphics.iconcolor import IconColor
+from sugar.p2p import Stream
+from sugar import util
+
+_PRESENCE_SERVICE_TYPE = "_presence_olpc._tcp"
+
+class BotService(object):
+	def __init__(self, bot):
+		self._bot = bot
+
+	def announce(self):
+		props = { 'color':  self._bot.color.to_string() }
+		pservice = PresenceService.get_instance()
+		self._service = pservice.register_service(self._bot.name,
+							_PRESENCE_SERVICE_TYPE, properties=props)
+
+		self._stream = Stream.Stream.new_from_service(self._service)
+		self._stream.register_reader_handler(
+						self._handle_buddy_icon_request, "get_buddy_icon")
+		self._stream.register_reader_handler(
+						self._handle_invite, "invite")
+
+	def _handle_buddy_icon_request(self):
+		if self._bot.icon:
+			fd = open(self._bot.icon, "r")
+			icon_data = fd.read()
+			fd.close()
+			if icon_data:
+				return base64.b64encode(self._icon)
+		return ''
+
+	def _handle_invite(self, issuer, bundle_id, activity_id):
+		return ''
+
+	def set_current_activity(self, activity_id):
+		self._service.set_published_value('curact', dbus.String(activity_id))
+
+class Bot(object):
+	def __init__(self):
+		self.name = util.unique_id()
+		self.color = IconColor()
+		self.icon = None
+
+	def start(self):
+		self._service = BotService(self)
+		self._service.announce()