text: /***************************************************************************************
   * Copyright 2019 Adobe. All rights reserved.
   * This file is licensed to you under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License. You may obtain a copy
   * of the License at http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under
   * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
   * OF ANY KIND, either express or implied. See the License for the specific language
   * governing permissions and limitations under the License.
   ****************************************************************************************/
  
  'use strict';
  var loadScript = require('@adobe/reactor-load-script');
  var Promise = require('@adobe/reactor-promise');
  var findScriptByRegexPattern =
    require('../../helpers/findPageScript').byRegexPattern;
  
  var codeBySourceUrl = {};
  var scriptStore = {};
  
  var loadScriptOnlyOnce = function (url) {
    if (!scriptStore[url]) {
      scriptStore[url] = loadScript(url);
    }
  
    return scriptStore[url];
  };
  
  _satellite.__registerScript = function (scriptGuid, code) {
    var scriptUrl;
    if (document.currentScript) {
      // use getAttribute in case it's a relative url
      scriptUrl = document.currentScript.getAttribute('src');
    } else {
      var pattern = new RegExp('.*' + scriptGuid + '.*');
      // use getAttribute in case it's a relative url
      scriptUrl = findScriptByRegexPattern(pattern).getAttribute('src');
    }
    codeBySourceUrl[scriptUrl] = code;
  };
  
  module.exports = function (sourceUrl) {
    if (codeBySourceUrl[sourceUrl]) {
      return Promise.resolve(codeBySourceUrl[sourceUrl]);
    } else {
      return new Promise(function (resolve) {
        loadScriptOnlyOnce(sourceUrl).then(
          function () {
            resolve(codeBySourceUrl[sourceUrl]);
          },
          function () {
            resolve();
          }
        );
      });
    }
  };
  