fix for textbox parsing

app.py

@@ -14,6 +14,14 @@ except Exception as e:
 # ---------------------------------------------------------------------
 # MCP - returns raw dictionary format
 # ---------------------------------------------------------------------
+def create_metadata_dict(sources_input, sources_value):
+    """
+    This helper function creates the filter dictionary based on user input.
+    """
+    if sources_input and sources_value:
+        return {sources_input: sources_value}
+    return None
+
 
 def retrieve(
     query:str, 
@@ -77,11 +85,8 @@ with gr.Blocks() as ui:
                 placeholder="Ecuador, Guatemala",
                 info="Filter by document subtype (leave empty for all)"
             )
-            if sources_input & sources_value:
-                filter_metadata = {sources_input:sources_value}
-            else: 
-                filter_metadata = None
-            
+
+            filter_metadata_state = gr.State(None)            
             submit_btn = gr.Button("Submit", variant="primary")
         
         # Output needs to be in json format to be added as tool in HuggingChat
@@ -93,11 +98,23 @@ with gr.Blocks() as ui:
             )
     
     # UI event handler
+    # submit_btn.click(
+    #     fn=retrieve,
+    #     inputs=[query_input,collection_name, filter_metadata],
+    #     outputs=output,
+    #     api_name="retrieve"
+    # )
     submit_btn.click(
+        fn=create_metadata_dict,
+        inputs=[sources_input, sources_value],
+        outputs=filter_metadata_state,
+        queue=False
+    ).then(
+        # 3. Use the updated state as an input to the retrieve function.
         fn=retrieve,
-        inputs=[query_input,collection_name, filter_metadata],
+        inputs=[query_input, collection_name, filter_metadata_state],
         outputs=output,
-        api_name="retrieve"
+        queue=False
     )