Add ExportedCategory model

backend/data_export/models.py

@@ -0,0 +1,18 @@
+import abc
+from typing import Any, Dict, Protocol
+
+from labels.models import Category
+
+
+class ExportedLabel(Protocol):
+    @abc.abstractmethod
+    def dict(self) -> Dict[str, Any]:
+        raise NotImplementedError("Please implement this method in the subclass.")
+
+
+class ExportedCategory(Category):
+    def dict(self) -> Dict[str, Any]:
+        return {"category": self.label.text}
+
+    class Meta:
+        proxy = True