background.py

import os
import time

import requests

import checker

NICKNAMES = os.environ.get("NICKNAMES")
TELEGRAM_BOT_TOKEN = os.environ.get("TELEGRAM_BOT_TOKEN")
TELEGRAM_CHAT_ID = os.environ.get("TELEGRAM_CHAT_ID")

if not all({NICKNAMES, TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID}):
    raise RuntimeError(
        "You need to set NICKNAMES, "
        "TELEGRAM_BOT_TOKEN and TELEGRAM_CHAT_ID "
        "environment variables"
    )


def main():
    while True:
        for nickname in NICKNAMES.split(","):
            if checker.check(nickname):
                url = f"https://api.telegram.org/bot{TELEGRAM_BOT_TOKEN}/sendMessage"
                data = {
                    "chat_id": TELEGRAM_CHAT_ID,
                    "text": f"<code>{nickname}</code> is available now!",
                    "parse_mode": "HTML",
                }
                requests.post(url, json=data)

        time.sleep(60)


if __name__ == "__main__":
    main()