added event pause/resume functionality

src/utils/event_system.py

@@ -13,7 +13,20 @@ class EventSystem(Singleton):
 
     def __init__(self):
         self.subscribers = defaultdict(list)
+        self._is_paused  = False
 
+        self._subscribe_to_events()
+
+
+    def _subscribe_to_events(self):
+        self.subscribe("pause_event_processing", self._pause_processing_events)
+        self.subscribe("resume_event_processing", self._resume_processing_events)
+
+    def _pause_processing_events(self):
+        self._is_paused = True
+
+    def _resume_processing_events(self):
+        self._is_paused = False
 
     def subscribe(self, event_type, fn):
         self.subscribers[event_type].append(fn)
@@ -25,6 +38,9 @@ class EventSystem(Singleton):
         self.subscribers.pop(event_type, None)
 
     def emit(self, event_type, data = None):
+        if self._is_paused and event_type != "resume_event_processing":
+            return
+
         if event_type in self.subscribers:
             for fn in self.subscribers[event_type]:
                 if data:
@@ -36,6 +52,9 @@ class EventSystem(Singleton):
                     fn()
 
     def emit_and_await(self, event_type, data = None):
+        if self._is_paused and event_type != "resume_event_processing":
+            return
+
         """ NOTE: Should be used when signal has only one listener and vis-a-vis """
         if event_type in self.subscribers:
             response = None