wongjiahau/ttap-web

export class TimeSpan {
  public readonly TotalSeconds: number;

  public constructor(hours: number, minutes: number, seconds: number) {
    if (hours < 0 || minutes < 0 || seconds < 0) {
      throw RangeError;
    }
    this.TotalSeconds = seconds + (hours * 60 + minutes) * 60;
  }

  public Hours(): number {
    const numberOfSecondsPerHour = 3600;
    return Math.floor(this.TotalSeconds / numberOfSecondsPerHour);
  }

  public Minutes(): number {
    const numberOfSecondsPerHour = 3600;
    const numberOfSecondsPerMinute = 60;
    return Math.floor(
      (this.TotalSeconds % numberOfSecondsPerHour) / numberOfSecondsPerMinute
    );
  }

  public Seconds(): number {
    const numberOfSecondsPerMinute = 60;
    return this.TotalSeconds % numberOfSecondsPerMinute;
  }

  public TotalMinutes(): number {
    return this.TotalSeconds / 60;
  }

  public TotalHours(): number {
    return this.TotalMinutes() / 60;
  }

  public Equal(other: TimeSpan): boolean {
    if (this.TotalSeconds !== other.TotalSeconds) {
      return false;
    }
    return true;
  }
}