Helper method for countdown

countdown.helper.ts

/**
 * This class has a static a method `run` which needs to pass a callback method in order to get back the values 
 * for minutes and seconds 
 * If you need to show number values with zeros on pad start you have an example at the end of this code:
 * Countdown 
 * run {method}
 * @author Eledi Dyrkaj <edyrkaj@gmail.com>
 */
export class Countdown {
  /**
  * @param callback(response) callback function passed as parameter to return values to parent object
  * @countdownMinutues| optional minutes to wait for this countdown
  */
  static run(calllback: (_timer) => void, countdownMinutes: number = 30) {
    const second = 1000,
    minute = second * 60,
    hour = minute * 60;

    const nowDate = new Date(),
      countDown = new Date(new Date().setMinutes(nowDate.getMinutes() + countdownMinutes)).getTime(),
      x = setInterval(() => {
        const now = new Date().getTime(),
            distance = countDown - now;

        calllback({
          minutes: Math.floor((distance % (hour)) / (minute)),
          seconds: Math.floor((distance % (minute)) / (second))
        });

        // close countdown
        if (distance <= 1) { clearInterval(x); }
    }, second);
  }
}
                         
/*
const timer = { minutes: '30', seconds: '00' };                          
Countdown.run((timer) => {
  this.timer.minutes = String(timer.minutes).padStart(2, '0');
  this.timer.seconds = String(timer.seconds).padStart(2, '0');
  console.log(timer); // 29:59 ... 29:09
}, 30);
*/