medium, creating an interceptor to device device types

gistfile1.js

app.factory('apInterceptor', ['$q', '$location', '$rootScope', '$routeParams', 'DEVICES',
  function($q, $location, $rootScope, $routeParams, DEVICES) {
    return {

      request: function(config) {

        var setDevice = function() {
          if ($routeParams.uamip !== undefined && $routeParams.uamport !== undefined) {
            $rootScope.deviceId = DEVICES.ct;
          } else if ( $routeParams.switchip !== undefined && $routeParams.cmd !== undefined ) {
            $rootScope.deviceId = DEVICES.aruba;
          } else if ( $routeParams.login_url !== undefined && $routeParams.ap_tags !== undefined) {
            $rootScope.deviceId = DEVICES.meraki;
          }
        };

        $rootScope.$on('$routeChangeSuccess', function () {
          if ($rootScope.deviceId === undefined) {
            setDevice();
          }
        });
        return config;

      }
    };
  }
]);