Reintroduce FSM update messages with minor changes

lib/tfw/components/fsm_managing_event_handler.py

@@ -1,13 +1,13 @@
 # Copyright (C) 2018 Avatao.com Innovative Learning Kft.
 # All Rights Reserved. See LICENSE file for details.
 
-from tfw import BroadcastingEventHandler
+from tfw import EventHandlerBase
 from tfw.config.logs import logging
 
 LOG = logging.getLogger(__name__)
 
 
-class FSMManagingEventHandler(BroadcastingEventHandler):
+class FSMManagingEventHandler(EventHandlerBase):
     def __init__(self, key, fsm_type):
         super().__init__(key)
         self.fsm = fsm_type()
@@ -22,28 +22,29 @@ class FSMManagingEventHandler(BroadcastingEventHandler):
         try:
             data = message['data']
             message['data'] = self.command_handlers[data['command']](data)
+            self.server_connector.broadcast(self._fsm_updater.generate_fsm_update())
             return message
         except KeyError:
             LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
 
     def handle_trigger(self, data):
         self.fsm.step(data['value'])
-        return self.with_fsm_update(data)
-
-    def with_fsm_update(self, data):
-        return {
-            **data,
-            **self._fsm_updater.get_fsm_state_and_transitions()
-        }
+        return data
 
     def handle_update(self, data):
-        return self.with_fsm_update(data)
+        return data
 
 
 class FSMUpdater:
     def __init__(self, fsm):
         self.fsm = fsm
 
+    def generate_fsm_update(self):
+        return {
+            'key': 'fsm_update',
+            'data': self.get_fsm_state_and_transitions()
+        }
+
     def get_fsm_state_and_transitions(self):
         state = self.fsm.state
         valid_transitions = [