Implement FSM status updates to frontend

src/app/handlers/zmq_websocket_handler.py

@@ -1,5 +1,5 @@
 import logging
-
+import json
 from tornado.websocket import WebSocketHandler
 from util import parse_anchor_from_message
 
@@ -24,6 +24,11 @@ class ZMQWebSocketHandler(WebSocketHandler):
     def on_message(self, message):
         logging.debug('Received on WebSocket: {}'.format(message))
         fsm.trigger(parse_anchor_from_message(message), message=message)
+        anchor = 'FSMUpdate'
+        response = { 'anchor': anchor,
+                     'data': { 'current_state': fsm.state,
+                               'valid_transitions': [{'trigger': trigger} for trigger in fsm.machine.get_triggers()]}}
+        self.send_message(json.dumps(response), anchor)
 
     def send_message(self, message: str, anchor: str = None):
         event_handler_connector.send_message(message, anchor)