Auth guard

gistfile1.txt

import {map} from 'rxjs/operators';
import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot} from '@angular/router';
import {Injectable} from '@angular/core';
import {Observable} from 'rxjs';
import {AuthenticationService} from './services/authentication.service';
import {CurrentUserService} from './services/current-user.service';

@Injectable()
export class AuthenticationGuard implements CanActivate {
  constructor(private _router: Router,
              private _authService: AuthenticationService,
              private _currentUserService: CurrentUserService) {
  }

  public canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {
    if(!this._authService.isAuthenticated) {
      this._router.navigate(['login']);
      return false;
    } else if(route.data && route.data.requiredRoles) {
      return this._currentUserService
        .getCurrentUser().pipe(
        map(user => {
          return user.hasAnyRole(route.data.requiredRoles);
        }));
    }
    return true;
  }
}