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

/*
* Include service and subscrube to isOnlineEmitter
*/

@Injectable({
  providedIn: 'root'
})
export class NetConnectionCheckService {
  private readonly timer: number = 5000;
  private isOnline: boolean = true;
  public isOnlineEmitter: EventEmitter<boolean> = new EventEmitter()

  constructor() {
    this.setTimer();
  }

  private setTimer(): void {
    setInterval(_ => {
      if(this.isOnline !== navigator.onLine) {
        this.isOnline = navigator.onLine;
        this.isOnlineEmitter.emit(navigator.onLine);
      }
    }, this.timer)
  }
}