/*
* Copyright 2003-2006, 2009, 2017, 2020 United States Government, as represented
* by the Administrator of the National Aeronautics and Space Administration.
* All rights reserved.
*
* The NASAWorldWind/WebWorldWind platform is licensed 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
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* NASAWorldWind/WebWorldWind also contains the following 3rd party Open Source
* software:
*
* ES6-Promise – under MIT License
* libtess.js – SGI Free Software License B
* Proj4 – under MIT License
* JSZip – under MIT License
*
* A complete listing of 3rd Party software notices and licenses included in
* WebWorldWind can be found in the WebWorldWind 3rd-party notices and licenses
* PDF found in code directory.
*/
define([
'../../../util/Promise',
'../../../util/WWUtil'
], function (Promise,
WWUtil) {
/**
* It can handle the format in which is the URL present in the file and transform it to the URL available
* for the relevant other concepts.
* @param url {String} Representation of the url of the resource.
* @param fileCache {KmlFileCache} Cache representing potential links loaded by current KML file.
* @constructor
* @alias KmlHrefResolver
*/
var KmlHrefResolver = function (url, fileCache) {
/**
* The url to be resolved. The result will be an URL again. It is possible to load any binary data into
* readable URL.
*/
this._url = url;
/**
* File cache used to retrieve the links URL.
*/
this._fileCache = fileCache;
};
/**
* It returns relevant string. Either the url directly or retrieved from cache. It means that the cache needs
* to resolve the URLs upfront.
* @private
* @return {String} Either external URL or internal URL representing the information.
*/
KmlHrefResolver.prototype.url = function () {
if (WWUtil.startsWith(this._url, 'http://') || WWUtil.startsWith(this._url, 'https://')) {
return this._url;
} else {
var retrieved = this._fileCache.retrieve('kmz;' + this._url);
if(!retrieved) {
retrieved = this._fileCache.retrieve('href;' + this._url);
// Probably relative path.
if(!retrieved) {
return this._url;
} else {
return retrieved;
}
} else {
return retrieved;
}
}
};
return KmlHrefResolver;
});