Refactor comments app to use mixins for comment functionality; update admin interfaces and add historical model fixes

location/mixins.py

@@ -0,0 +1,43 @@
+from django.contrib.contenttypes.models import ContentType
+from django.db.models import QuerySet
+from typing import Optional, Tuple
+
+class LocationMixin:
+    """Mixin for models that can have location data attached."""
+
+    def get_location(self) -> Optional['Location']:
+        """Get location for this instance."""
+        from location.models import Location
+        ct = ContentType.objects.get_for_model(self.__class__)
+        return Location.objects.filter(content_type=ct, object_id=self.pk).first()
+
+    def set_location(self, address: str, latitude: float, longitude: float) -> 'Location':
+        """Set or update location for this instance."""
+        from location.models import Location
+        ct = ContentType.objects.get_for_model(self.__class__)
+        location, created = Location.objects.update_or_create(
+            content_type=ct,
+            object_id=self.pk,
+            defaults={
+                'address': address,
+                'latitude': latitude,
+                'longitude': longitude
+            }
+        )
+        return location
+
+    @property
+    def coordinates(self) -> Optional[Tuple[float, float]]:
+        """Get coordinates (latitude, longitude) if available."""
+        location = self.get_location()
+        if location:
+            return location.latitude, location.longitude
+        return None
+
+    @property
+    def formatted_location(self) -> str:
+        """Get formatted address string if available."""
+        location = self.get_location()
+        if location:
+            return location.get_formatted_address()
+        return ""