utils.py

import urllib.request
import re

from threading import Timer

class RepeatedTimer(object):
    def __init__(self, interval, function, *args, **kwargs):
        self._timer     = None
        self.interval   = interval
        self.function   = function
        self.args       = args
        self.kwargs     = kwargs
        self.is_running = False
        self.start()

    def _run(self):
        self.is_running = False
        self.start()
        self.function(*self.args, **self.kwargs)

    def start(self):
        if not self.is_running:
            self._timer = Timer(self.interval, self._run)
            self._timer.start()
            self.is_running = True

    def stop(self):
        self._timer.cancel()
        self.is_running = False

def is_live(channel_id):
    url = f"https://www.youtube.com/channel/{channel_id}/live"

    with urllib.request.urlopen(url) as response:
        html = response.read().decode()

        try:
            og_url = re.search(r'<meta property="og:url" content="(.+?)">', html).group(1)
        except AttributeError:
            og_url = re.search(r'<link rel="canonical" href="(.+?)">', html).group(1)

        if "watch?v=" in og_url:
            return og_url
        elif "/channel/" in og_url or "/user/" in og_url:
            return False
        else:
            raise RuntimeError(f"Something weird happened on checking Live for {channel_id}...")

def log(msg):
    print(f"[INFO]{msg}")

def warn(msg):
    print(f"[WARN]{msg}")