Encapsulate discretization in Event::discretize_timeslots

Encapsulates the code to select the timeslot discretization.

Addresses #15 (closed)

AKModel/views/ak.py

@@ -114,11 +114,7 @@ class AKJSONExportView(AdminViewMixin, FilterByEventSlugMixin, ListView):
             if (values := AKSlot.objects.select_related().filter(ak__pk=ak_id, fixed=True)).exists()
         }
 
-        if DefaultSlot.objects.filter(event=self.event).exists():
-            # discretize default slots if they exists
-            blocks = merge_blocks(self.event.default_time_slots(slots_in_an_hour=SLOTS_IN_AN_HOUR))
-        else:
-            blocks = self.event.uniform_time_slots(slots_in_an_hour=SLOTS_IN_AN_HOUR)
+        blocks = self.event.discretize_timeslots(slots_in_an_hour=SLOTS_IN_AN_HOUR)
 
         for block in blocks:
             current_block = []