Filter out transparent events (Fixes #661) (#663)

backend/src/appointment/controller/apis/google_client.py

@@ -109,6 +109,7 @@ def list_events(self, calendar_id, time_min, time_max, token):
  'items/attendees',
  'items/start',
  'items/end',
+ 'items/transparency',
  # Top level stuff
  'nextPageToken',
  )

backend/src/appointment/controller/calendar.py

@@ -177,10 +177,12 @@ def list_events(self, start, end):
 
  events = []
  for event in remote_events:
+ # If the event doesn't have transparency assume its opaque (and thus blocks time) by default.
+ transparency = event.get('transparency', 'opaque').lower()
  status = event.get('status').lower()
 
- # Ignore cancelled events
- if status == 'cancelled':
+ # Ignore cancelled events or non-time blocking events
+ if status == 'cancelled' or transparency == 'transparent':
  continue
 
  # Mark tentative events
@@ -333,10 +335,11 @@ def list_events(self, start, end):
  expand=True,
  )
  for e in result:
+ transparency = e.icalendar_component['transp'].lower() if 'transp' in e.icalendar_component else 'opaque'
  status = e.icalendar_component['status'].lower() if 'status' in e.icalendar_component else ''
 
  # Ignore cancelled events
- if status == 'cancelled':
+ if status == 'cancelled' or transparency == 'transparent':
  continue
 
  # Mark tentative events