Encapsulate discretization in Event::discretize_timeslots

Encapsulates the code to select the timeslot discretization.

Addresses #15 (closed)

AKModel/models.py

@@ -385,9 +385,9 @@ class Event(models.Model):
     def discretize_timeslots(self, *, slots_in_an_hour: float = 1.0) -> Iterable[TimeslotBlock]:
         if DefaultSlot.objects.filter(event=self).exists():
             # discretize default slots if they exists
-            yield from merge_blocks(self.default_time_slots(slots_in_an_hour=SLOTS_IN_AN_HOUR))
+            yield from merge_blocks(self.default_time_slots(slots_in_an_hour=slots_in_an_hour))
         else:
-            yield from self.uniform_time_slots(slots_in_an_hour=SLOTS_IN_AN_HOUR)
+            yield from self.uniform_time_slots(slots_in_an_hour=slots_in_an_hour)
 
     def schedule_from_json(self, schedule: str) -> None:
         """Load AK schedule from a json string.