unicef/magicbox-maps

import history from '../history';
import auth0 from 'auth0-js';
import {AUTH_CONFIG} from './auth0-variables';

/**
 * Class to deal with login and authentication
 */
export default class Auth {
  /**
   * Auth class constructor
   */
  constructor() {
    this.login = this.login.bind(this);
    this.logout = this.logout.bind(this);
    this.handleAuthentication = this.handleAuthentication.bind(this);
    this.isAuthenticated = this.isAuthenticated.bind(this);
    this.auth0 = new auth0.WebAuth({
      domain: AUTH_CONFIG.domain,
      clientID: AUTH_CONFIG.clientId,
      redirectUri: AUTH_CONFIG.callbackUrl,
      audience: `https://${AUTH_CONFIG.domain}/userinfo`,
      responseType: 'token id_token',
      scope: 'openid'
    });
  }

  /**
   * Login method
   */
  login() {
    this.auth0.authorize();
  }

  /**
   * Handle authentication
   */
  handleAuthentication() {
    this.auth0.parseHash((err, authResult) => {
      if (authResult && authResult.accessToken && authResult.idToken) {
        this.setSession(authResult);
        history.replace('/home');
      } else if (err) {
        history.replace('/home');
        console.log(err);
        alert(`Error: ${err.error}. Check the console for further details.`);
      }
    });
  }

  /**
   * Set session
   *
   * @param {object} authResult Authorization result
   */
  setSession(authResult) {
    console.log(authResult, '!!!!')
    // Set the time that the access token will expire at
    let expiresAt = JSON.stringify((authResult.expiresIn * 1000) +
      new Date().getTime());
    localStorage.setItem('access_token', authResult.accessToken);
    localStorage.setItem('id_token', authResult.idToken);
    localStorage.setItem('expires_at', expiresAt);
    // navigate to the home route
    history.replace('/home');
  }

  /**
   * Deauthenticate user
   */
  logout() {
    // Clear access token and ID token from local storage
    localStorage.removeItem('access_token');
    localStorage.removeItem('id_token');
    localStorage.removeItem('expires_at');
    // navigate to the home route
    history.replace('/home');
  }

  /**
   * Check if user is authenticated
   *
   * @return {boolean}
   */
  isAuthenticated() {
    // Check whether the current time is past the
    // access token's expiry time
    let expiresAt = JSON.parse(localStorage.getItem('expires_at'));
    return new Date().getTime() < expiresAt;
  }
}