adding saving chat

app.py

@@ -270,6 +270,19 @@ def chatbot(query):
 #demo.launch(share=False)
 # Initialize chat history with a welcome message
 
+def ask(user_message, chat_history):
+    if not user_message:
+        return chat_history, chat_history, ""
+
+    response = chatbot(user_message)
+    chat_history.append((user_message, response))
+
+    # Save chat history to file
+    with open(HISTORY_FILE, "w", encoding="utf-8") as f:
+        json.dump(chat_history, f, ensure_ascii=False, indent=2)
+
+    return chat_history, chat_history, ""
+
 initial_message = (None, "Hello, how can I help you with Moodle?")
 
 with gr.Blocks(theme=gr.themes.Soft()) as demo:
@@ -285,3 +298,4 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
     save_button.click(save_chat_to_file, [chat_history], None)  # to save the chat 
 
 
+