Move update/create follow up logic in own method

aleksis/apps/chronos/models.py

@@ -482,13 +482,7 @@ class LessonEvent(CalendarEvent):
             else:
                 alarms = LessonEventAlarm.objects.filter(event=self, status="c")
                 for alarm in alarms:
-                    if alarm.has_sent_notifications:
-                        follow_up_alarm = LessonEventAlarm(
-                            event=self, send_notifications=True, status="e"
-                        )
-                        follow_up_alarm.save()
-                    else:
-                        alarm.update_or_create_notifications()
+                    alarm.update_or_create_follow_up()
 
     class Meta:
         verbose_name = _("Lesson Event")
@@ -509,13 +503,7 @@ def create_alarm_on_teachers_m2m_changed(
 
     alarms = LessonEventAlarm.objects.filter(event=instance, status="c")
     for alarm in alarms:
-        if alarm.has_sent_notifications:
-            follow_up_alarm = LessonEventAlarm(
-                event=self, send_notifications=True, status="e"
-            )
-            follow_up_alarm.save()
-        else:
-            alarm.update_or_create_notifications()
+        alarm.update_or_create_follow_up()
 
 
 class LessonEventAlarm(CalendarAlarm):
@@ -571,6 +559,15 @@ class LessonEventAlarm(CalendarAlarm):
     def has_sent_notifications(self) -> bool:
         return self.notifications.filter(sent=True).exists()
 
+    def update_or_create_follow_up(self):
+        if self.has_sent_notifications:
+            follow_up_alarm = LessonEventAlarm(
+                event=self.event, send_notifications=True, status="e"
+            )
+            follow_up_alarm.save()
+        else:
+            self.update_or_create_notifications()
+
     class Meta:
         verbose_name = _("Lesson event alarm")
         verbose_name_plural = _("Lesson event alarms")