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

@Injectable({
  providedIn: 'root'
})
export class InProgressLoaderService {
  private loader = new Subject<boolean>();
  private counter = 0;

  showLoader() {
    return this.loader.asObservable();
  }

  resetCounter() {
    this.counter = 0;
  }

  getCounter() {
    return this.counter;
  }

  startLoader() {
    this.counter++;
    this.loader.next(true);
  }

  stopLoader() {
    this.counter > 0 ? this.counter-- : '';

    if (this.counter === 0) {
      this.loader.next(false);
    }
  }
}