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jQuery(function ($) {
"use strict";
/**
* Reset the message.
*/
function resetMessage () {
$("#result")
.removeClass()
.text("");
}
/**
* show a successful message.
* @param {String} text the text to show.
*/
function showMessage(text) {
resetMessage();
$("#result")
.addClass("alert alert-success")
.text(text);
}
/**
* show an error message.
* @param {String} text the text to show.
*/
function showError(text) {
resetMessage();
$("#result")
.addClass("alert alert-danger")
.text(text);
}
/**
* Fetch the content, add it to the JSZip object
* and use a jQuery deferred to hold the result.
* @param {String} url the url of the content to fetch.
* @param {String} filename the filename to use in the JSZip object.
* @param {JSZip} zip the JSZip instance.
* @return {jQuery.Deferred} the deferred containing the data.
*/
function deferredAddZip(url, filename, zip) {
var deferred = $.Deferred();
JSZipUtils.getBinaryContent(url, function (err, data) {
if(err) {
deferred.reject(err);
} else {
zip.file(filename, data, {binary:true});
deferred.resolve(data);
}
});
return deferred;
}
if(!JSZip.support.blob) {
showError("This demo works only with a recent browser !");
return;
}
var $form = $("#download_form").on("submit", function () {
resetMessage();
var zip = new JSZip();
var deferreds = [];
// find every checked item
$(this).find(":checked").each(function () {
var $this = $(this);
var url = $this.data("url");
var filename = url.replace(/.*\//g, "");
deferreds.push(deferredAddZip(url, filename, zip));
});
// when everything has been downloaded, we can trigger the dl
$.when.apply($, deferreds).done(function () {
var blob = zip.generate({type:"blob"});
// see FileSaver.js
saveAs(blob, "example.zip");
showMessage("done !");
}).fail(function (err) {
showError(err);
});
return false;
});
});
// vim: set shiftwidth=4 softtabstop=4:
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