Add build_full_path method to LocalStorageService and stub method to StorageService

src/backend/langflow/services/storage/local.py

@@ -15,6 +15,10 @@ class LocalStorageService(StorageService):
         self.data_dir = Path(settings_service.settings.CONFIG_DIR)
         self.set_ready()
 
+    def build_full_path(self, flow_id: str, file_name: str) -> str:
+        """Build the full path of a file in the local storage."""
+        return str(self.data_dir / flow_id / file_name)
+
     async def save_file(self, flow_id: str, file_name: str, data: bytes):
         """
         Save a file in the local storage.

src/backend/langflow/services/storage/service.py

@@ -16,6 +16,9 @@ class StorageService(Service):
         self.session_service = session_service
         self.set_ready()
 
+    def build_full_path(self, flow_id: str, file_name: str) -> str:
+        pass
+
     def set_ready(self):
         self.ready = True