interceptor.es6.js

class HttpAuthService {
  constructor($q, $injector) {
    super($q);
    angular.extend(this, {$q, $injector});
  }

  request(config) {
    //console.log(config);
    return config;
  }

  requestError(rejection) {
    //console.log(rejection);
    return this.$q.reject(rejection);
  }

  response(config) {
    var UserService = this.$injector.get('UserService');
    if (this.isApiRequest(config.url)) {
      if (this.UserService.isAuthorized()) {
        // This is just a prototype UserService is a fiction of my imagination
      }
    }

    return config;
  }

  responseError(rejection) {
    //console.log(rejection);
    return this.$q.reject(rejection);
  }

  isApiRequest(url) {
    return url.search('/external/api') > -1;
  }

  static httpAuthFactory($q, $injector) {
    return new HttpAuthService($q, $injector);
  }
}

HttpAuthService.httpAuthFactory.$inject = ['$q', '$injector'];

angular.module('mailApp').config(($provide, $httpProvider) => {
  $provide.factory('authorizeInterceptor', HttpAuthService.httpAuthFactory);
  $httpProvider.interceptors.push('authorizeInterceptor');
});