Initial add

app.py

@@ -0,0 +1,64 @@
+import os
+import streamlit as st
+import requests
+import uuid
+
+API_URL = os.environ.get("AWS_INVOKE_URL")
+st.title('Hi, This is AppliBot')
+
+intro_message = """Need help navigating the maze of college applications? 
+    Deadlines, recommendation letters, essays—I’ve got you covered. 
+    Let’s tackle it together, one question at a time!"""
+
+example_message = """For example: 
+When is the deadline for MIT undergraduate application? 
+How many recommendation letters are required?"""
+
+# Init session_id
+if 'session_id' not in st.session_state:
+    st.session_state.session_id = str(uuid.uuid4())
+
+# Init chat_history and display
+if 'chat_history' not in st.session_state:
+    st.session_state.chat_history = [
+        {'role': 'assistant', 'text': intro_message}, 
+        {'role': 'assistant', 'text': example_message}]
+for message in st.session_state.chat_history:
+    with st.chat_message(message['role']):
+        st.markdown(message['text'])
+
+def clean_message(message):
+    # Remove quote ""
+    message = message[1:-1]
+
+    # Take care of \n\n
+    message = message.replace("\\n", "\n") # \n(\\n) -> actual newline
+    message = message.replace("\n\n", "\n") 
+
+    return message.strip()
+
+# Input user message
+input_text = st.chat_input('Chat here')
+if input_text:
+    with st.chat_message('user'):
+        st.markdown(input_text)
+    st.session_state.chat_history.append({
+        'role': 'user', 'text': input_text})
+    try:
+        response_raw = requests.post(API_URL,
+            params={'session_id': st.session_state.session_id, 
+                'user_input': input_text}
+        )
+        response_data = response_raw.json()
+        if response_data.get("statusCode") == 200:
+            chat_response = response_data.get('body')
+            chat_response = clean_message(chat_response)
+        else:
+            chat_response = "Sorry, some errors. Can you ask again?"
+
+        with st.chat_message('assistant'):
+            st.markdown(chat_response)
+        st.session_state.chat_history.append(
+            {'role': 'assistant', 'text': chat_response})
+    except requests.exceptions.RequestException as e:
+        st.error(f"Error communicating with the backend: {e}")