Refactor attribute saving (#14090)

* Refactor attribute saving

* Ensure sub label is not overwritten

* Formatting

* Fix unused

frigate/track/object_attribute.py

@@ -0,0 +1,44 @@
+"""Object attribute."""
+
+from frigate.util.object import area, box_inside
+
+
+class ObjectAttribute:
+    def __init__(self, raw_data: tuple) -> None:
+        self.label = raw_data[0]
+        self.score = raw_data[1]
+        self.box = raw_data[2]
+        self.area = raw_data[3]
+        self.ratio = raw_data[4]
+        self.region = raw_data[5]
+
+    def get_tracking_data(self) -> dict[str, any]:
+        """Return data saved to the object."""
+        return {
+            "label": self.label,
+            "score": self.score,
+            "box": self.box,
+        }
+
+    def find_best_object(self, objects: list[dict[str, any]]) -> str:
+        """Find the best attribute for each object and return its ID."""
+        best_object_area = None
+        best_object_id = None
+
+        for obj in objects:
+            if not box_inside(obj["box"], self.box):
+                continue
+
+            object_area = area(obj["box"])
+
+            # if multiple objects have the same attribute then they
+            # are overlapping, it is most likely that the smaller object
+            # is the one with the attribute
+            if best_object_area is None:
+                best_object_area = object_area
+                best_object_id = obj["id"]
+            elif object_area < best_object_area:
+                best_object_area = object_area
+                best_object_id = obj["id"]
+
+        return best_object_id