Update app.py

app.py

@@ -83,29 +83,39 @@ def main():
     st.write("<!-- End Spacer -->", unsafe_allow_html=True)
 
     if pdf is not None:
-        query = st.text_input("Ask questions about your PDF file (in any preferred language):", value=st.session_state['current_input'])
+    query = st.text_input("Ask questions about your PDF file (in any preferred language):")
 
-        if st.button("Ask"):
-            st.session_state['current_input'] = query
-            st.session_state['chat_history'].append(("User", query, "new"))
+    if st.button("Ask") or (query and query != st.session_state.get('last_input', '')):
+        st.session_state['last_input'] = query  # Save the current query as the last input
+        st.session_state['chat_history'].append(("User", query, "new"))
 
-            loading_message = st.empty()
-            loading_message.text('Bot is thinking...')
+        loading_message = st.empty()
+        loading_message.text('Bot is thinking...')
 
-            VectorStore = load_pdf(pdf)
-            chain = load_chatbot()
-            docs = VectorStore.similarity_search(query=query, k=3)
-            with get_openai_callback() as cb:
-                response = chain.run(input_documents=docs, question=query)
+        VectorStore = load_pdf(pdf)
+        chain = load_chatbot()
+        docs = VectorStore.similarity_search(query=query, k=3)
+        with get_openai_callback() as cb:
+            response = chain.run(input_documents=docs, question=query)
 
-            # Display the bot's response immediately using JavaScript
-            st.write(f"<div id='response' style='background-color: #caf; padding: 10px; border-radius: 10px; margin: 10px;'>Bot: {response}</div>", unsafe_allow_html=True)
-            st.write("<script>document.getElementById('response').scrollIntoView();</script>", unsafe_allow_html=True)
+        st.session_state['chat_history'].append(("Bot", response, "new"))
 
-            loading_message.empty()
+        # Display new messages at the bottom
+        new_messages = st.session_state['chat_history'][-2:]
+        for chat in new_messages:
+            background_color = "#FFA07A" if chat[2] == "new" else "#acf" if chat[0] == "User" else "#caf"
+            new_messages_placeholder.markdown(f"<div style='background-color: {background_color}; padding: 10px; border-radius: 10px; margin: 10px;'>{chat[0]}: {chat[1]}</div>", unsafe_allow_html=True)
 
-        # Mark all messages as old after displaying
-        st.session_state['chat_history'] = [(sender, msg, "old") for sender, msg, _ in st.session_state['chat_history']]
+        # Scroll to the latest response using JavaScript
+        st.write("<script>document.getElementById('response').scrollIntoView();</script>", unsafe_allow_html=True)
+
+        loading_message.empty()
+
+        # Clear the input field by setting the query variable to an empty string
+        query = ""
+
+    # Mark all messages as old after displaying
+    st.session_state['chat_history'] = [(sender, msg, "old") for sender, msg, _ in st.session_state['chat_history']]
 
 def display_chat_history(chat_history):
     for chat in chat_history: