app.py

import base64
import json
import os

import modal
import requests
import streamlit as st
from loguru import logger
from pydub import AudioSegment

PASSWORDS = os.environ["PASSWORD"].split(",")
ROOT_PASSWORDS = os.environ["ROOT_PASSWORD"].split(",")

run_transcription = modal.Function.lookup(
    "ffpub-transcription", "run_transcription", environment_name="main"
)

st.set_page_config(page_title="Speech to Text Transcription App")


@st.cache(show_spinner=False)
def transcribe(url, audio_b64, cutoff):
    payload = {"url": url, "audio_b64": audio_b64, "cutoff": cutoff or 60_000}
    response = requests.post(
        "https://aseifert--ffpub-transcription-fastapi-app.modal.run/transcribe", json=payload
    )
    return response.json()


def password_is_correct(password):
    return password in PASSWORDS or password in ROOT_PASSWORDS


def input_is_ready(password, audio_file, url):
    return password_is_correct(password) and (audio_file or url)


def run():
    st.markdown(
        "<style>section.main > div:first-child { padding-top: 0; padding-bottom: 0; }</style>",
        unsafe_allow_html=True,
    )

    running = False
    submit_button = False
    if "is_expanded" not in st.session_state:
        st.session_state["is_expanded"] = True

    # expander = st.expander("Einstellungen", expanded=st.session_state["is_expanded"])
    # with expander:
    password = st.text_input("Zugriffscode (siehe oben)")
    url = audio_file = None

    col1, col2 = st.columns([1, 3])
    type = col1.radio(
        "Input",
        ["Beispiel (Kabarett)", "URL (YouTube, …)", "Datei-Upload"],
    )
    if type == "Beispiel (Kabarett)":
        url = col2.text_input(
            "URL (e.g. YouTube video, Dropbox file, etc.)",
            value="https://www.youtube.com/watch?v=6UONiGMmbS4",
            disabled=True,
        )
    elif type == "URL (YouTube, …)":
        url = col2.text_input(
            "URL (e.g. YouTube video, Dropbox file, etc.)",
            value="",
        )
        if "youtu" in url:
            url = url.replace("youtu.be/", "youtube.com/watch?v=")
        elif "dropbox" in url:
            url = url.replace("dl=0", "raw=1")
    else:
        audio_file = col2.file_uploader(
            "Datei auswählen", type=[".wav", ".mp3", ".flac", ".m4a", ".ogg"]
        )

    submit_button = col2.button(
        label="⚡ Transkribieren"
        + (" (Zugriffscode inkorrekt)" if not password_is_correct(password) else ""),
        disabled=(not password_is_correct(password) or (not audio_file and not url) or running),
    )

    cutoff = audio_b64 = None
    cutoff = None if password in ROOT_PASSWORDS else 60
    if audio_file or url:
        # with st.expander(("Audio" if audio_file else "Video") + " abspielen"):
        if audio_file:
            st.audio(audio_file)
            audio_file = AudioSegment.from_file(audio_file)[: cutoff * 1000 if cutoff else None]
            audio_b64 = base64.b64encode(audio_file.export().read()).decode("ascii")
        if url:
            if url == "https://www.youtube.com/watch?v=6UONiGMmbS4":
                cutoff = None
            st.video(url)

    if input_is_ready(password, audio_file, url) and submit_button:
        # my_bar = st.progress(0)
        # for percent_complete in range(100):
        #     time.sleep(1)
        #     my_bar.progress(percent_complete + 1)

        running = True
        with st.spinner("Transkription läuft..."):
            transcription = transcribe(url, audio_b64, cutoff)
            running = False

        st.text_area("Transkript", transcription["text"], height=300)

        with st.expander("⬇️ Transkript herunterladen"):
            st.download_button(
                label="⬇️ Txt-Datei herunterladen",
                data=transcription["text"],
                file_name="transkript.txt",
                mime="text/plain",
            )

            st.download_button(
                label="⬇️ OTR-Datei herunterladen",
                data=json.dumps(transcription["otr"], indent=2, ensure_ascii=False),
                file_name="transkript.otr",
                mime="application/json",
            )


try:
    run()
except Exception as e:
    logger.error(e)
    st.error(
        "Leider ist ein unerwarter Fehler aufgetreten. Ich kann mir das Problem sofort ansehen, Sie erreichen mich unter alexander@ff.pub"
    )