Update app.py

app.py

@@ -270,20 +270,20 @@ def chatbot(query):
 #demo.queue()
 #demo.launch(share=False)
 # Initialize chat history with a welcome message
-import io
 
 def save_chat_to_file(chat_history):
     timestamp = time.strftime("%Y%m%d-%H%M%S")
     filename = f"chat_history_{timestamp}.json"
 
-    # Prepare the file content
-    file_content = json.dumps(chat_history, ensure_ascii=False, indent=2)
-    
-    # Create an in-memory file (using io.BytesIO or io.StringIO)
-    file_obj = io.StringIO(file_content)
-    
-    # Return the file object and filename so Gradio can process it
-    return (filename, file_obj)
+    # Create a temporary file
+    temp_dir = tempfile.gettempdir()
+    file_path = os.path.join(temp_dir, filename)
+
+    # Write the chat history into the file
+    with open(file_path, "w", encoding="utf-8") as f:
+        json.dump(chat_history, f, ensure_ascii=False, indent=2)
+
+    return file_path  # THIS should be only the path, not a tuple!
 
 def ask(user_message, chat_history):
     if not user_message:
@@ -302,14 +302,12 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
     chatbot_ui = gr.Chatbot(value=[initial_message])
     question = gr.Textbox(placeholder="Ask me anything about Moodle...", show_label=False)
     clear_button = gr.Button("Clear")
-    save_button = gr.Button("Save Chat")  # to save the chat 
+    save_button = gr.Button("Save Chat")  
 
     question.submit(ask, [question, chat_history], [chatbot_ui, chat_history, question])
     clear_button.click(lambda: ([initial_message], [initial_message], ""), None, [chatbot_ui, chat_history, question], queue=False)
     
-    # Clicking the save button will trigger file download
-    save_button.click(save_chat_to_file, [chat_history], gr.File())  
+    save_button.click(save_chat_to_file, [chat_history], gr.File(label="Download your chat history"))
 
 demo.queue()
 demo.launch(share=False)
-