import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class UpdateService {

  constructor() { }

  private async_actions: Array<() => Promise<void>> = [];
  private actions: Array<() => void> = [];

  addAsync(action: () => Promise<void>): void {
    this.async_actions.push(action);
  }

  add(action: () => void): void {
    this.actions.push(action);
  }

  removeAll(): void {
    this.async_actions = [];
  }

  async executeAll(): Promise<void> {
    await Promise.all(this.async_actions.map(action => action()));
    this.actions.forEach(action => action());
    this.removeAll();
  }
}