text: (function() {
      'use strict';
  
      angular
          .module('echarliApp')
          .factory('DateUtils', DateUtils);
  
      DateUtils.$inject = ['$filter'];
  
      function DateUtils ($filter) {
  
          var service = {
              convertDateTimeFromServer : convertDateTimeFromServer,
              convertLocalDateFromServer : convertLocalDateFromServer,
              convertLocalDateToServer : convertLocalDateToServer,
              dateformat : dateformat
          };
  
          return service;
  
          function convertDateTimeFromServer (date) {
              if (date) {
                  return new Date(date);
              } else {
                  return null;
              }
          }
  
          function convertLocalDateFromServer (date) {
              if (date) {
                  var dateString = date.split('-');
                  return new Date(dateString[0], dateString[1] - 1, dateString[2]);
              }
              return null;
          }
  
          function convertLocalDateToServer (date) {
              if (date) {
                  return $filter('date')(date, 'yyyy-MM-dd');
              } else {
                  return null;
              }
          }
  
          function dateformat () {
              return 'yyyy-MM-dd';
          }
      }
  
  })();
  