50 lines
1.4 KiB
JavaScript
50 lines
1.4 KiB
JavaScript
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/* $This file is distributed under the terms of the license in /doc/license.txt$ */
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/**
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* Manage async download contents and make sure don't have the same
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* download request in the same time. Provide ability to abort download.
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*/
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var DownloadManager = Class.extend({
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init: function() {
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this.downloadList = {};
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},
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download: function(url, success) {
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if (!this.hasKey(url)) {
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this.downloadList[url] = { success: success, // TODO Try removing this property
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jqxhr: this.startDownload(url, success, this.downloadList)};
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}
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},
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downloadAndWait: function(url, success) {
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if (!this.hasKey(url)) {
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$.ajax({
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url: url,
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async: false,
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dataType: 'json',
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success: function(countData) { success(countData); }
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});
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}
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},
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startDownload: function(url, success, downloadList) {
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return $.getJSON(url, // TODO Not always "latest" //TODO Test on server with big file that consume 3 seconds download time. Then Keep on and off the checkbox while downloading, to verify if the duplicate happens
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function(countData) {
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if (success) {
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success(countData);
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}
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delete(downloadList[url]);
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}
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);
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},
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hasKey: function(url) {
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return (this.downloadList[url]);
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},
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abort: function(url) {
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var options = this.downloadList[url];
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if (options) {
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options.jqxhr.abort();
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delete(this.downloadList[url]);
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}
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},
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isDone: function(url) {
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return !this.hasKey(url);
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}
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});
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