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