add utility function to know if an event is now

tabellio/agenda/event.py

@@ -88,7 +88,13 @@ class BaseEvent(Item):
         except IndexError:
             return '#'
 
-
+    def is_now(self):
+        now = datetime.datetime.now()
+        if now < self.start:
+            return False
+        if self.end and now > self.end:
+            return False
+        return True
 
 class Event(BaseEvent):
     implements(IEvent)