refactor(cache/manager.py): extract add method to reduce code duplication

feat(cache/manager.py): add support for custom extensions when adding objects to cache

src/backend/langflow/cache/manager.py

@@ -1,5 +1,5 @@
 from contextlib import contextmanager
-from typing import Any, Awaitable, Callable, List
+from typing import Any, Awaitable, Callable, List, Optional
 from PIL import Image
 import pandas as pd
 
@@ -74,6 +74,30 @@ class CacheManager(Subject):
             self.current_client_id = previous_client_id
             self.current_cache = self.CACHE.get(self.current_client_id, {})
 
+    def add(self, name: str, obj: Any, obj_type: str, extension: Optional[str] = None):
+        """
+        Add an object to the current client's cache.
+
+        Args:
+            name (str): The cache key.
+            obj (Any): The object to cache.
+            obj_type (str): The type of the object.
+        """
+        object_extensions = {
+            "image": "png",
+            "pandas": "csv",
+        }
+        if obj_type in object_extensions:
+            _extension = object_extensions[obj_type]
+        else:
+            _extension = type(obj).__name__.lower()
+        self.current_cache[name] = {
+            "obj": obj,
+            "type": obj_type,
+            "extension": extension or _extension,
+        }
+        self.notify()
+
     def add_pandas(self, name: str, obj: Any):
         """
         Add a pandas DataFrame or Series to the current client's cache.
@@ -83,12 +107,11 @@ class CacheManager(Subject):
             obj (Any): The pandas DataFrame or Series object.
         """
         if isinstance(obj, (pd.DataFrame, pd.Series)):
-            self.current_cache[name] = {"obj": obj, "type": "pandas"}
-            self.notify()
+            self.add(name, obj.to_csv(), "pandas", extension="csv")
         else:
             raise ValueError("Object is not a pandas DataFrame or Series")
 
-    def add_image(self, name: str, obj: Any):
+    def add_image(self, name: str, obj: Any, extension: str = "png"):
         """
         Add a PIL Image to the current client's cache.
 
@@ -97,8 +120,7 @@ class CacheManager(Subject):
             obj (Any): The PIL Image object.
         """
         if isinstance(obj, Image.Image):
-            self.current_cache[name] = {"obj": obj, "type": "image"}
-            self.notify()
+            self.add(name, obj, "image", extension=extension)
         else:
             raise ValueError("Object is not a PIL Image")