import { Injectable } from '@angular/core';
import { CanActivate, Router, RouterStateSnapshot, ActivatedRouteSnapshot } from '@angular/router';
import { AuthService } from './auth.service';

@Injectable()
export class AuthGuardService implements CanActivate {

  constructor(private authService: AuthService,
              private router: Router) { }

  canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
    return this.checkLogin(state.url);
  }

  checkLogin(url?: string) {
    if (this.authService.isLoggedIn) { return true; }

    // Store the attempted URL for redirecting
    this.authService.redirectUrl = url;

    // Navigate to the login page with extras
    this.router.navigate(['/login']);
    return false;
  }
}