app.js

;(function(){
function authInterceptor(API, auth) {
  return {
    // automatically attach Authorization header
    request: function(config) {
      var token=auth.getToken();
      if(config.url.indexOf(API) === 0 && token){
        config.headers.Authorization='Bearer '+token;
      }
      return config;
    },

    // If a token was sent back, save it
    response: function(res) {
      if(res.config.url.indexOf(API) === 0 && res.data.token){
         auth.saveToken(res.data.token);
      }
      return res;
    },
  }
}

function authService($window) {
  var self = this;
  self.parseJwt=function(token){
    var base64Url=token.split('.')[1];
    var base64=base64Url.replace('-','+').replace('_','/');
    return JSON.parse($window.atob(base64));
  }

  self.saveToken = function(token) {
    $window.localStorage['jwtToken'] = token;
  }

  self.getToken = function(token){
     return $window.localStorage['jwtToken'];
  }

  self.isAuthed=function(){
    var token=self.getToken();
    if(token){
      var params=self.parseJwt(token);
      return Math.round(new Date().getTime()/1000) <= params.exp;
    }else{
      return false;
    }
  }

  self.logout = function() {
    $window.localStorage.removeItem('jwtToken');
  }

  // Add JWT methods here
}

function userService($http, API, auth) {
  var self = this;
  self.getQuote = function() {
    return $http.get(API + '/auth/quote')
  }

  self.register = function(username, password) {
    return $http.post(API + '/auth/register', {
        username: username,
        password: password
      })
  }

  self.login = function(username, password) {
    return $http.post(API + '/auth/login', {
        username: username,
        password: password
      })
  };



  // add authentication methods here

}

// We won't touch anything in here
function MainCtrl(user, auth) {
  var self = this;

  function handleRequest(res) {
    var token = res.data ? res.data.token : null;
    if(token) { console.log('JWT:', token); }
    self.message = res.data.message;
  }

  self.login = function() {
    user.login(self.username, self.password)
      .then(handleRequest, handleRequest)
  }
  self.register = function() {
    user.register(self.username, self.password)
      .then(handleRequest, handleRequest)
  }
  self.getQuote = function() {
    user.getQuote()
      .then(handleRequest, handleRequest)
  }
  self.logout = function() {
    auth.logout && auth.logout()
  }
  self.isAuthed = function() {
    return auth.isAuthed ? auth.isAuthed() : false
  }
}

angular.module('app', [])
.factory('authInterceptor', authInterceptor)
.service('user', userService)
.service('auth', authService)
.constant('API', 'http://test-routes.herokuapp.com')
.config(function($httpProvider) {
  $httpProvider.interceptors.push('authInterceptor');
})
.controller('Main', MainCtrl)
})();