added reset functionality

app.py

@@ -14,6 +14,9 @@ def launch_bot():
         response = vq.submit_query(question, cfg.bot_role, cfg.topic, cfg.style)
         return response
 
+    def reset():
+        st.session_state.messages = [{"role": "assistant", "content": "Please make your opening statement.", "avatar": '🦖'}]
+
     if 'cfg' not in st.session_state:
         cfg = OmegaConf.create({
             'customer_id': str(os.environ['VECTARA_CUSTOMER_ID']),
@@ -24,6 +27,10 @@ def launch_bot():
         st.session_state.cfg = cfg
         st.session_state.vq = VectaraQuery(cfg.api_key, cfg.customer_id, cfg.corpus_id, cfg.prompt_name)
 
+        st.session_state.current_human_role = None
+        st.session_state.current_topic = None
+        st.session_state.style = None
+
     cfg = st.session_state.cfg
     vq = st.session_state.vq
     st.set_page_config(page_title="Debate Bot", layout="wide")
@@ -36,14 +43,27 @@ def launch_bot():
         role_options = ['in opposition to', 'in support of']
         cfg.human_role = st.selectbox('Your are:', role_options)
         cfg.bot_role = role_options[1] if cfg.human_role == role_options[0] else role_options[0]
+        if st.session_state.current_human_role != cfg.human_role:
+            st.session_state.current_human_role = cfg.human_role
+            reset()
 
         topic_options = list(topics.keys())
         cfg.topic = st.selectbox('The topic:', topic_options)
         vq.corpus_id = topics[cfg.topic]
+        if st.session_state.current_topic != cfg.topic:
+            st.session_state.current_topic = cfg.topic
+            reset()
 
         st.markdown("\n")
         debate_styles = ['Lincoln-Douglas', 'Spontaneous Argumentation', 'Parliamentary debates']
         cfg.style = st.selectbox('Debate Style:', debate_styles)
+        if st.session_state.style != cfg.style:
+            st.session_state.style = cfg.style
+            reset()
+
+        st.markdown("\n\n")
+        if st.button('Start Over'):
+            reset()
 
         st.markdown("---")
         st.markdown(
@@ -53,8 +73,9 @@ def launch_bot():
         )
         st.markdown("---")
 
+
     if "messages" not in st.session_state.keys():
-        st.session_state.messages = [{"role": "assistant", "content": f"Please make your opening statement.", "avatar": '🦖'}]
+        reset()
 
     # Display chat messages
     for message in st.session_state.messages:
@@ -66,7 +87,7 @@ def launch_bot():
         st.session_state.messages.append({"role": "user", "content": prompt, "avatar": '🧑‍💻'})
         with st.chat_message("user", avatar='🧑‍💻'):
             st.write(prompt)
-    
+
     # Generate a new response if last message is not from assistant
     if st.session_state.messages[-1]["role"] != "assistant":
         with st.chat_message("assistant", avatar='🤖'):