add more guard rails to remove double chat

examples/chat/app.py

@@ -27,7 +27,7 @@
  "style": {"bottom": "calc(50% - 4.25rem", "right": "0.4rem"},
 }
 # set artifacts remote_path to WORKSPACE
-artifacts = va.tools.Artifacts(WORKSPACE / "artifacts.pkl")
+artifacts = va.tools.meta_tools.Artifacts(WORKSPACE / "artifacts.pkl")
 if Path("artifacts.pkl").exists():
  artifacts.load("artifacts.pkl")
 else:
@@ -109,16 +109,22 @@ def main():
  len(st.session_state.messages) == 0
  or prompt != st.session_state.messages[-1]["content"]
  ):
- st.session_state.messages.append(
- {"role": "user", "content": prompt}
- )
- messages.chat_message("user").write(prompt)
- message_thread = threading.Thread(
- target=update_messages,
- args=(st.session_state.messages, message_lock),
- )
- message_thread.daemon = True
- message_thread.start()
+ # occassionally resends the last user message twice 
+ user_messages = [msg for msg in st.session_state.messages if msg["role"] == "user"]
+ last_user_message = None
+ if len(user_messages) > 0:
+ last_user_message = user_messages[-1]["content"]
+ if last_user_message is None or last_user_message != prompt:
+ st.session_state.messages.append(
+ {"role": "user", "content": prompt}
+ )
+ messages.chat_message("user").write(prompt)
+ message_thread = threading.Thread(
+ target=update_messages,
+ args=(st.session_state.messages, message_lock),
+ )
+ message_thread.daemon = True
+ message_thread.start()
  st.session_state.input_text = ""
 
  with tabs[1]: