src/app.py

import csv
import gradio as gr
from interface import create_demo
from pdfchatbot import PDFChatBot

demo, chat_history, show_img, txt, submit_button, uploaded_pdf, download_chat_history, slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k = create_demo()

pdf_chatbot = PDFChatBot()

def download_chat_history(chat_history):
    with open("chat_history.csv", "w", newline="") as csvfile:
        writer = csv.writer(csvfile)
        writer.writerow(["User", "Bot"])  # header row
        for user_text, bot_text in chat_history:
            writer.writerow([user_text, bot_text])
    return "chat_history.csv"

with demo:
    uploaded_pdf.upload(pdf_chatbot.render_file, inputs=[uploaded_pdf,slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k], outputs=[show_img])

    submit_button.click(pdf_chatbot.add_text, inputs=[chat_history, txt], outputs=[chat_history], queue=False).\
        success(pdf_chatbot.generate_response, inputs=[chat_history, txt, uploaded_pdf,slider_chunk_size,slider_overlap_percentage,slider_temp,slider_k], outputs=[chat_history,txt]).\
        success(pdf_chatbot.render_file, inputs=[uploaded_pdf], outputs=[show_img])
    
    download_button = gr.Button("Download Chat History")
    download_output = gr.outputs.File("chat_history.csv")
    download_button.click(fn=download_chat_history, inputs=[chat_history], outputs=download_output)

if __name__ == "__main__":
    demo.launch()