Telegram Bot Template

bot_template.py

import os

from dotenv import load_dotenv
from telegram import Update
from telegram.ext import Application, CommandHandler, ContextTypes, MessageHandler, filters


load_dotenv()

TOKEN = os.environ["BOT_TOKEN"]

def start_polling():
    # Create the Application and pass it the token
    application = Application.builder().token(TOKEN).build()

    # on different commands - answer in Telegram
    application.add_handler(CommandHandler("start", start))

    # on text message
    application.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, handle_text_message))

    # on voice message
    application.add_handler(MessageHandler(filters.VOICE, handle_voice_message))

    # run the bot
    application.run_polling()


async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    await update.message.reply_markdown(f'''Welcome!
''')


async def handle_text_message(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    chat_id = str(update.effective_chat.id)
    message = update.message.text
    translation = translate(message, language)
    await update.message.reply_text(translation, reply_to_message_id=update.message.message_id)


async def handle_voice_message(update: Update, context: ContextTypes.DEFAULT_TYPE) -> None:
    chat_id = str(update.effective_chat.id)
    voice = update.message.voice
    voice_file = await voice.get_file()

    if not os.path.exists("voice_messages"):
        os.makedirs("voice_messages")

    # download user's voice message
    voice_file_path = f"voice_messages/{voice_file.file_id}.oga"
    await voice_file.download_to_drive(custom_path=voice_file_path)
    
    # transcribe user's message to English
    transcript = translate_whisper(voice_file_path)
    
    # translate the transcript to the target language
    await update.message.reply_text(transcript, reply_to_message_id=update.message.message_id)
   
    # delete the voice file
    os.remove(voice_file)


def main():
    start_polling()


if __name__ == "__main__":
    main()