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import os | |
import tempfile | |
import streamlit as st | |
from streamlit_chat import message | |
from rag import ChatPDF | |
st.set_page_config(page_title="ChatPDF") | |
def display_messages(): | |
st.subheader("Chat") | |
for i, (msg, is_user) in enumerate(st.session_state["messages"]): | |
message(msg, is_user=is_user, key=str(i)) | |
st.session_state["thinking_spinner"] = st.empty() | |
def process_input(): | |
if st.session_state["user_input"] and len(st.session_state["user_input"].strip()) > 0: | |
user_text = st.session_state["user_input"].strip() | |
with st.session_state["thinking_spinner"], st.spinner(f"Thinking"): | |
agent_text = st.session_state["assistant"].ask(user_text) | |
st.session_state["messages"].append((user_text, True)) | |
st.session_state["messages"].append((agent_text, False)) | |
def read_and_save_file(): | |
st.session_state["assistant"].clear() | |
st.session_state["messages"] = [] | |
st.session_state["user_input"] = "" | |
for file in st.session_state["file_uploader"]: | |
with tempfile.NamedTemporaryFile(delete=False) as tf: | |
tf.write(file.getbuffer()) | |
file_path = tf.name | |
with st.session_state["ingestion_spinner"], st.spinner(f"Ingesting {file.name}"): | |
st.session_state["assistant"].ingest(file_path) | |
os.remove(file_path) | |
def page(): | |
if len(st.session_state) == 0: | |
st.session_state["messages"] = [] | |
st.session_state["assistant"] = ChatPDF() | |
st.header("ChatPDF") | |
st.subheader("Upload a document") | |
st.file_uploader( | |
"Upload document", | |
type=["pdf"], | |
key="file_uploader", | |
on_change=read_and_save_file, | |
label_visibility="collapsed", | |
accept_multiple_files=True, | |
) | |
st.session_state["ingestion_spinner"] = st.empty() | |
display_messages() | |
st.text_input("Message", key="user_input", on_change=process_input) | |
if __name__ == "__main__": | |
page() |
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