Implement crude FSMManager – wip

lib/tfw/networking/server/tfw_server.py

@@ -36,6 +36,30 @@ class TFWServer:
         self.application.listen(port)
 
 
+class FSMManager:
+    def __init__(self, fsm_type):
+        self.fsm = fsm_type()
+        self.trigger_handlers = {}
+
+    def trigger(self, trigger):
+        self._prepare_handlerlist(trigger)
+        if all((handler() for handler in self.trigger_handlers[trigger])):
+            try: self.fsm.trigger(trigger, message='')
+            except AttributeError: log.debug('FSM failed to execute nonexistent trigger: "{}"'.format(trigger))
+
+    def subscribe_handler(self, trigger, handler):
+        self._prepare_handlerlist(trigger)
+        self.trigger_handlers[trigger].append(handler)
+
+    def unsubscribe_handler(self, trigger, handler):
+        self._prepare_handlerlist(trigger)
+        self.trigger_handlers[trigger].append(handler)
+
+    def _prepare_handlerlist(self, trigger):
+        try: self.trigger_handlers[trigger]
+        except KeyError: self.trigger_handlers[trigger] = []
+
+
 class FSMUpdater:
     def __init__(self, fsm):
         self.fsm = fsm