AngularJS - Service - Localisation from TYPO3-XML

localisation-controller.js

'use strict';

angular.module('App')
  .controller('localisationCtrl',
  function ($scope, localisationService) {

  localisationService.settings.language('de');
  localisationService.settings.file('../typo3conf/ext/extKey/Resources/Private/Language/locallang.xml');
  
  });

localisation-service.js

'use strict';

angular.module('BackendApp')
  .factory('localisationService', function ($rootScope, $http) {

    /**
     * Installation:
     * Service require x2js (https://code.google.com/p/x2js)
     *
     * Definitions in controller:
     * localisationService.settings.language('de');
     * localisationService.settings.file('../typo3conf/ext/extKey/Resources/Private/Language/locallang.xml');
     *
     * Translation in view:
     * {{service.localisation.key('keyword')}}
     *
     * Change language in view:
     * <div ng-click="service.localisation.changeLanguage('de')">de</div>
     */

    if($rootScope.service === undefined){
      $rootScope.service = {};
    }
    $rootScope.service.localisation = {};
    
    var settings = {
      file: '',
      language: ''
    };

    // Translation object
    var translation = {};

    // ----------------------------------------------------------------
    // Initialisation (get locallang-file and set translation object)
    // ----------------------------------------------------------------
    function initialize(){
      $http.get(settings.file, {transformResponse: function (data) {
        var x2js = new X2JS();
        var json = x2js.xml_str2json(data);
        return json;
      }}).success(function (data, status) {
          angular.forEach(data.T3locallang.data.languageKey, function (languageObject) {
            translation[languageObject._index] = languageObject;
            angular.forEach(translation[languageObject._index]['label'], function (labelObject) {
              translation[languageObject._index][labelObject._index] = labelObject.__text
            });
          })
        })
    }

    // ----------------------------------------------------------------
    // ROOTSCOPE: key-function
    // ----------------------------------------------------------------
    $rootScope.service.localisation.key = function(translationKey) {
      if(translation[settings.language] !== undefined && translation[settings.language][translationKey] !== undefined){
        return translation[settings.language][translationKey];
      }
      else {
        return 'No Translation for key "' + translationKey + '"';
      }
    }

    // ----------------------------------------------------------------
    // ROOTSCOPE: change-language-function
    // ----------------------------------------------------------------
    $rootScope.service.localisation.changeLanguage = function(language){
      settings.language = language;
    }

    // ----------------------------------------------------------------
    // Settings
    // ----------------------------------------------------------------
    return {
      settings: {
        file: function (file) {
          settings.file = file;
          initialize();
        },
        language: function (language) {
          settings.language = language;
        }
      }
    };

  });