Class ProgressBar

src/ProgressBar.ts:31–115

}

export class ProgressBar extends EventEmitter implements ProgressBarState {
  private _current: number = 0
  public get current() { return this._current }
  public set current(value: number) {
    this._current = Math.max(value, 0)
    this.checkCompleteEvent()
  }

  private _total: number = 0
  public get total() { return this._total }
  public set total(value: number) {
    this._total = Math.max(value, 0)
    this.checkCompleteEvent()
  }

  private _completeEventEmitted = false
  private get completeEventEmitted() { return this._completeEventEmitted }
  private set completeEventEmitted(value: boolean) {
    if (this.completeEventEmitted && !value) this.emit(Events.REACTIVATED)
    this._completeEventEmitted = value
  }

  public title: string
  public readonly startTime = Date.now();

  eventNames(): Array<string> {
    return Object.values(Events);
  }

  constructor({ current, total, title }: { current?: number, total?: number, title?: string } = {}) {
    super()
    this.current = current ?? this.current;
    this.total = total ?? this.total
    this.title = title ?? ''
    this.checkCompleteEvent()
  }

  private checkCompleteEvent() {
    if (this.completeEventEmitted && !this.isComplete()) {
      this.completeEventEmitted = false
    }

    if (this.isComplete() && this.current > 0 && !this.completeEventEmitted) {
      this.completeEventEmitted = true
      this.emit(Events.COMPLETED)
    }
  }

  public tick(value: number) {
    const incValue = (this.current + value) > this.total
      ? Math.min(this.total - this.current, value)
      : value

    this.current += incValue
    this.emit(Events.TICK, incValue)
  }

  public rate(): number {