Filter out events that have concluded

Sometimes, icalevents will return entries that have already ended. Filter them out.

buba/animations/icalevents.py

@@ -18,8 +18,17 @@ class IcalEvents(BubaAnimation):
         return f"<{type(self).__name__}, {self.url}>"
 
     def update(self):
+        """
+        Fetch all events from now to the end of the range.
+        Filter out events that have ended. Apparently, the icalecvents list can contain entries
+        that are slightly in the past (by an hours or two). Only use entries that have not reached
+        their end date/time yet.
+        :return:
+        """
         tz = timezone(os.getenv("TZ", "Europe/Berlin"))
-        events = icalevents.icalevents.events(self.url, tzinfo=tz, sort=True, end=datetime.now(tz) + self.range)
+        now = datetime.now(tz)
+        events = icalevents.icalevents.events(self.url, tzinfo=tz, sort=True, end=now + self.range)
         for event in events:
             event.start = event.start.astimezone(tz)
+        events = filter(lambda e: e.end > now, events)
         self.rows = [[e.summary, self.countdown(e.start)] for e in events]