first commit

backend/app/utils/serialization.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from dataclasses import asdict, is_dataclass
+from datetime import date, datetime
+from typing import Any
+
+
+def to_plain(value: Any) -> Any:
+    if is_dataclass(value):
+        return to_plain(asdict(value))
+    if isinstance(value, datetime):
+        return value.isoformat()
+    if isinstance(value, date):
+        return value.isoformat()
+    if isinstance(value, dict):
+        return {key: to_plain(item) for key, item in value.items()}
+    if isinstance(value, (list, tuple, set)):
+        return [to_plain(item) for item in value]
+    return value