Add callback from statemachine to update webinterface status

fetapd.py

@@ -75,6 +75,7 @@ if __name__ == '__main__':
     feap = FeApUserInterface(cfg.pinconfig)
     controller = statemachine.StateMachineController(phone, feap, cfg.dialconfig)
     webinterface = FeTapWeb({}, controller)
+    controller.publish_state = webinterface.publish_status
 
     # TODO: Use real events from daemon
     controller.queue_event('registration_in_progress')

statemachine.py

@@ -307,6 +307,10 @@ class StateMachineController(object):
             oldstate = self.state.__class__
             print('%s -> %s' % (oldstate.__name__, newstate.__name__))
             self.state = newstate(self)
+            self.publish_state()
+
+    def publish_state(self):
+        pass
 
     def queue_event(self, evname, *evargs, **evkwargs):
         if not hasattr(AbstractState, 'on_%s' % (evname)):