Add active field to ScheduleProfile and implement signals for status updates

scheduler/signals.py

@@ -0,0 +1,29 @@
+from django.db import transaction
+from django.db.models.signals import post_save, post_delete
+from django.dispatch import receiver
+
+from .models import ScheduleSlot, ScheduleProfile, PeerScheduling
+
+
+def _recalc_profile_and_reset_peers(profile_id: int | None) -> None:
+    if not profile_id:
+        return
+
+    has_slots = ScheduleSlot.objects.filter(profile_id=profile_id).exists()
+
+    ScheduleProfile.objects.filter(pk=profile_id).update(active=has_slots)
+
+    PeerScheduling.objects.filter(profile_id=profile_id).update(
+        next_scheduled_enable_at=None,
+        next_scheduled_disable_at=None,
+    )
+
+
+@receiver(post_save, sender=ScheduleSlot)
+def scheduleslot_post_save(sender, instance: ScheduleSlot, created: bool, **kwargs):
+    transaction.on_commit(lambda: _recalc_profile_and_reset_peers(instance.profile_id))
+
+
+@receiver(post_delete, sender=ScheduleSlot)
+def scheduleslot_post_delete(sender, instance: ScheduleSlot, **kwargs):
+    transaction.on_commit(lambda: _recalc_profile_and_reset_peers(instance.profile_id))