getCountdownFromSeconds.ts

export default class TimeUtility {
  public static SECONDS_IN = {
    WEEK: 604800,
    DAY: 86400,
    HOUR: 3600,
    MINUTE: 60,
  };

  public static getCountdownFromSeconds(seconds: number): string {
    if (seconds < 60) {
      return `${seconds}s`;
    }

    let time;
    let mod;
    if (seconds >= this.SECONDS_IN.WEEK) {
      time = `${Math.floor(seconds / this.SECONDS_IN.WEEK)}w`;
      mod = seconds % this.SECONDS_IN.WEEK;
    } else if (seconds >= this.SECONDS_IN.DAY) {
      time = `${Math.floor(seconds / this.SECONDS_IN.DAY)}d`;
      mod = seconds % this.SECONDS_IN.DAY;
    } else if (seconds >= this.SECONDS_IN.HOUR) {
      time = `${Math.floor(seconds / this.SECONDS_IN.HOUR)}h`;
      mod = seconds % this.SECONDS_IN.HOUR;
    } else if (seconds >= this.SECONDS_IN.MINUTE) {
      time = `${Math.floor(seconds / this.SECONDS_IN.MINUTE)}m`;
      mod = seconds % this.SECONDS_IN.MINUTE;
    }

    if (mod > 0) {
      return `${time} ${this.getCountdownFromSeconds(mod)}`;
    } else {
      return time;
    }
  }
}