use.md

// src/services/auth/auth.service.ts

import { Storage } from '@ionic/storage';
import { AuthHttp, JwtHelper, tokenNotExpired } from 'angular2-jwt';
import { Injectable, NgZone } from '@angular/core';
import { Observable } from 'rxjs/Rx';
import { Auth0Vars } from '../../auth0-variables';

// Avoid name not found warnings
declare var Auth0: any;
declare var Auth0Lock: any;

@Injectable()
export class AuthService {

  jwtHelper: JwtHelper = new JwtHelper();
  auth0 = new Auth0({clientID: '<%= account.clientId %>', domain: '<%= account.namespace %>' });
  lock = new Auth0Lock('<%= account.clientId %>', '<%= account.namespace %>', {
    auth: {
      redirect: false,
      params: {
        scope: 'openid offline_access',
      }
    }
  });
  storage: Storage = new Storage();
  refreshSubscription: any;
  user: Object;
  zoneImpl: NgZone;
  idToken: string;
  
  constructor(private authHttp: AuthHttp, zone: NgZone) {
    this.zoneImpl = zone;
    // Check if there is a profile saved in local storage
    this.storage.get('profile').then(profile => {
      this.user = JSON.parse(profile);
    }).catch(error => {
      console.log(error);
    });

    this.storage.get('id_token').then(token => {
      this.idToken = token;
    });

    this.lock.on('authenticated', authResult => {
      this.storage.set('id_token', authResult.idToken);
      this.idToken = authResult.idToken;

      // Fetch profile information
      this.lock.getProfile(authResult.idToken, (error, profile) => {
        if (error) {
          // Handle error
          alert(error);
          return;
        }

        profile.user_metadata = profile.user_metadata || {};
        this.storage.set('profile', JSON.stringify(profile));
        this.user = profile;
      });

      this.lock.hide();

      this.storage.set('refresh_token', authResult.refreshToken);
      this.zoneImpl.run(() => this.user = authResult.profile);
      // Schedule a token refresh
      this.scheduleRefresh();

    });    
  }

  public authenticated() { 
    return tokenNotExpired('id_token', this.idToken);
  }
  
  public login() {
    // Show the Auth0 Lock widget
    this.lock.show();
  }
  
  public logout() {
    this.storage.remove('profile');
    this.storage.remove('id_token');
    this.idToken = null;
    this.storage.remove('refresh_token');
    this.zoneImpl.run(() => this.user = null);
    // Unschedule the token refresh
    this.unscheduleRefresh();
  }