src/app/core/services/authentication.service.ts

/********************************************************************************
 * Copyright © 2018 Mettenmeier GmbH.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 ********************************************************************************/
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { UtilService } from '@core/services/util.service';
import { JwtHelperService } from '@auth0/angular-jwt';

@Injectable({
  providedIn: 'root'
})
export class AuthenticationService {
  basePath: string = this.utilService.readConfig('basePath');
  constructor(
    private http: HttpClient,
    private utilService: UtilService
  ) { }

  login(token: string) {
    localStorage.setItem('ACCESS_TOKEN', token);
    const jwtHelper = new JwtHelperService();
    const decodedToken = jwtHelper.decodeToken(token);
    localStorage.setItem('USER_NAME', decodedToken.name);
    localStorage.setItem('ROLES', decodedToken.realm_access.roles);
    return this.http.get(`${this.basePath}/auth/login`);
  }

  logout() {
    return this.http.get(`${this.basePath}/auth/logout`);
  }

  isLoggedIn() {
    if (localStorage.getItem('ACCESS_TOKEN')) {
      return true;
    }
    return false;
  }

  getUsername() {
    return localStorage.getItem('USER_NAME') || 'noUsername';
  }

  getUserRoles() {
    const roles = localStorage.getItem('ROLES');
    if (roles) {
      return roles.split(',');
    }
    return [];
  }

  /**
   * Checks if user has the expected roles.
   * @param expectedRoles The roles to check.
   */
  userHasRoles(expectedRoles: string[]) {
    return expectedRoles.some(v => this.getUserRoles().indexOf(v) > -1);
  }

}