app.py

import gradio as gr
from main import index, run
from gtts import gTTS
import os, time

from transformers import pipeline

p = pipeline("automatic-speech-recognition")

"""Use text to call chat method from main.py"""

models = ["GPT-3.5", "Flan UL2", "Flan T5"]

def add_text(history, text, model):
    print("Question asked: " + text)
    response = run_model(text, model)
    history = history + [(text, response)]
    print(history)
    return history, ""


def run_model(text, model):
    start_time = time.time()
    print("start time:" + str(start_time))
    response = run(text, model)
    end_time = time.time()
    # If response contains string `SOURCES:`, then add a \n before `SOURCES`
    if "SOURCES:" in response:
        response = response.replace("SOURCES:", "\nSOURCES:")
        # response = response + "\n\n" + "Time taken: " + str(end_time - start_time)
    print(response)
    print("Time taken: " + str(end_time - start_time))
    return response



def get_output(history, audio, model):

    txt = p(audio)["text"]
    # history.append(( (audio, ) , txt))
    audio_path = 'response.wav'
    response = run_model(txt, model)
    # Remove all text from SOURCES: to the end of the string
    trimmed_response = response.split("SOURCES:")[0]
    myobj = gTTS(text=trimmed_response, lang='en', slow=False)
    myobj.save(audio_path)
    # split audio by / and keep the last element
    # audio = audio.split("/")[-1]
    # audio = audio + ".wav"
    history.append(( (audio, ) , (audio_path, )))
    print(history)
    return history

def set_model(history, model):
    print("Model selected: " + model)
    history = get_first_message(history)
    index(model)
    return history


def get_first_message(history):
    history = [(None,
                'Learn about <a href="https://www.coursera.org/learn/3d-printing-revolution/home">3D printing Revolution</a> course with referred sources. Try out the new voice to voice Q&A on the course! ')]
    return history


def bot(history):
    return history

with gr.Blocks() as demo:
    # Title on top in middle of the page

    gr.HTML("<h1 style='text-align: center;color: blue'>Course Assistant - 3D Printing Revolution</h1>")

    chatbot = gr.Chatbot(get_first_message([]), elem_id="chatbot").style(height=500)

    with gr.Row():
        # Create radio button to select model
        radio = gr.Radio(models, label="Choose a model", value="GPT-3.5", type="value", visible=False)
    with gr.Row():
        # with gr.Column(scale=0.75):
            txt = gr.Textbox(
                label="Coursera Voice Q&A Bot",
                placeholder="Enter text and press enter, or upload an image", lines=1
            )

        # with gr.Column(scale=0.25):
            audio = gr.Audio(source="microphone", type="filepath", visible=False)

    with gr.Row():
        gr.Examples(
            examples=['What is 3D printing?', 'Who are the instructors of the course?', 'What is the course about?',
                      'Which software can be used to create a design file for 3D printing?', 'What are the key takeaways from the course?'], inputs=[txt],
            label="Examples")

    txt.submit(add_text, [chatbot, txt, radio], [chatbot, txt], postprocess=False).then(
        bot, chatbot, chatbot
    )

    audio.change(fn=get_output, inputs=[chatbot, audio, radio], outputs=[chatbot]).then(
        bot, chatbot, chatbot
    )

    radio.change(fn=set_model, inputs=[chatbot, radio], outputs=[chatbot]).then(bot, chatbot, chatbot)

    audio.change(lambda:None, None, audio)

    set_model(chatbot, radio.value)

if __name__ == "__main__":
    demo.queue()
    demo.queue(concurrency_count=5)
    demo.launch(debug=True)