First implementation of streamlit chat app in gui folder

gui/streamlit_chat_app.py

@@ -0,0 +1,97 @@
+import os
+import sys
+
+sys.path.append(os.path.join(os.path.dirname(__file__), os.path.pardir))
+
+import streamlit as st
+from streamlit_chat import message
+from query_methods import query, avail_query_methods
+import pickle
+
+
+conversations_file = "conversations.pkl"
+
+def load_conversations():
+    try:
+        with open(conversations_file, "rb") as f:
+            return pickle.load(f)
+    except FileNotFoundError:
+        return []
+
+def save_conversations(conversations, current_conversation):
+    updated = False
+    for i, conversation in enumerate(conversations):
+        if conversation == current_conversation:
+            conversations[i] = current_conversation
+            updated = True
+            break
+    if not updated:
+        conversations.append(current_conversation)
+    with open(conversations_file, "wb") as f:
+        pickle.dump(conversations, f)
+
+st.header("Chat Placeholder")
+
+if 'conversations' not in st.session_state:
+    st.session_state['conversations'] = load_conversations()
+
+if 'input_text' not in st.session_state:
+    st.session_state['input_text'] = ''
+
+if 'selected_conversation' not in st.session_state:
+    st.session_state['selected_conversation'] = None
+
+if 'input_field_key' not in st.session_state:
+    st.session_state['input_field_key'] = 0
+    
+if 'query_method' not in st.session_state:
+    st.session_state['query_method'] = query
+
+# Initialize new conversation
+if 'current_conversation' not in st.session_state or st.session_state['current_conversation'] is None:
+    st.session_state['current_conversation'] = {'user_inputs': [], 'generated_responses': []}
+
+
+input_placeholder = st.empty()
+user_input = input_placeholder.text_input('You:', key=f'input_text_{len(st.session_state["current_conversation"]["user_inputs"])}')
+submit_button = st.button("Submit")
+
+if user_input or submit_button:
+    output = query(user_input, st.session_state['query_method'])
+    
+    st.session_state.current_conversation['user_inputs'].append(user_input)
+    st.session_state.current_conversation['generated_responses'].append(output)
+    save_conversations(st.session_state.conversations, st.session_state.current_conversation)
+    user_input = input_placeholder.text_input('You:', value='', key=f'input_text_{len(st.session_state["current_conversation"]["user_inputs"])}')  # Clear the input field
+
+
+# Add a button to create a new conversation
+if st.sidebar.button("New Conversation"):
+    st.session_state['selected_conversation'] = None
+    st.session_state['current_conversation'] = {'user_inputs': [], 'generated_responses': []}
+    st.session_state['input_field_key'] += 1
+
+
+st.session_state['query_method'] = st.sidebar.selectbox(
+    "Select API:",
+    options=avail_query_methods.keys(),
+    index=0
+)
+
+# Sidebar
+st.sidebar.header("Conversation History")
+
+for i, conversation in enumerate(st.session_state.conversations):
+    if st.sidebar.button(f"Conversation {i + 1}: {conversation['user_inputs'][0]}", key=f"sidebar_btn_{i}"):
+        st.session_state['selected_conversation'] = i
+        st.session_state['current_conversation'] = st.session_state.conversations[i]
+
+if st.session_state['selected_conversation'] is not None:
+    conversation_to_display = st.session_state.conversations[st.session_state['selected_conversation']]
+else:
+    conversation_to_display = st.session_state.current_conversation
+
+if conversation_to_display['generated_responses']:
+    for i in range(len(conversation_to_display['generated_responses']) - 1, -1, -1):
+        message(conversation_to_display["generated_responses"][i], key=f"display_generated_{i}")
+        message(conversation_to_display['user_inputs'][i], is_user=True, key=f"display_user_{i}")