AI Video Generation Implementation

backend/api/story_writer/utils/auth.py

@@ -0,0 +1,23 @@
+from typing import Any, Dict
+
+from fastapi import HTTPException, status
+
+
+def require_authenticated_user(current_user: Dict[str, Any] | None) -> str:
+    """
+    Validates the current user dictionary provided by Clerk middleware and
+    returns the normalized user_id. Raises HTTP 401 if authentication fails.
+    """
+    if not current_user:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Authentication required")
+
+    user_id = str(current_user.get("id", "")).strip()
+    if not user_id:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Invalid user ID in authentication token",
+        )
+
+    return user_id
+
+