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/*
-----------------------------------------------------------
dom.loadScript.js : 0.1.4 : 2014/02/12 : http://mudcu.be
-----------------------------------------------------------
Copyright 2011-2014 Mudcube. All rights reserved.
-----------------------------------------------------------
/// No verification
dom.loadScript.add("../js/jszip/jszip.js");
/// Strict loading order and verification.
dom.loadScript.add({
strictOrder: true,
urls: [
{
url: "../js/jszip/jszip.js",
verify: "JSZip",
onsuccess: function() {
console.log(1)
}
},
{
url: "../inc/downloadify/js/swfobject.js",
verify: "swfobject",
onsuccess: function() {
console.log(2)
}
}
],
onsuccess: function() {
console.log(3)
}
});
/// Just verification.
dom.loadScript.add({
url: "../js/jszip/jszip.js",
verify: "JSZip",
onsuccess: function() {
console.log(1)
}
});
*/
if (typeof(dom) === "undefined") var dom = {};
(function() { "use strict";
dom.loadScript = function() {
this.loaded = {};
this.loading = {};
return this;
};
dom.loadScript.prototype.add = function(config) {
var that = this;
if (typeof(config) === "string") {
config = { url: config };
}
var urls = config.urls;
if (typeof(urls) === "undefined") {
urls = [{
url: config.url,
verify: config.verify
}];
}
/// adding the elements to the head
var doc = document.getElementsByTagName("head")[0];
///
var testElement = function(element, test) {
if (that.loaded[element.url]) return;
if (test && globalExists(test) === false) return;
that.loaded[element.url] = true;
//
if (that.loading[element.url]) that.loading[element.url]();
delete that.loading[element.url];
//
if (element.onsuccess) element.onsuccess();
if (typeof(getNext) !== "undefined") getNext();
};
///
var hasError = false;
var batchTest = [];
var addElement = function(element) {
if (typeof(element) === "string") {
element = {
url: element,
verify: config.verify
};
}
if (/([\w\d.\[\]\'\"])$/.test(element.verify)) { // check whether its a variable reference
var verify = element.test = element.verify;
if (typeof(verify) === "object") {
for (var n = 0; n < verify.length; n ++) {
batchTest.push(verify[n]);
}
} else {
batchTest.push(verify);
}
}
if (that.loaded[element.url]) return;
var script = document.createElement("script");
script.onreadystatechange = function() {
if (this.readyState !== "loaded" && this.readyState !== "complete") return;
testElement(element);
};
script.onload = function() {
testElement(element);
};
script.onerror = function() {
hasError = true;
delete that.loading[element.url];
if (typeof(element.test) === "object") {
for (var key in element.test) {
removeTest(element.test[key]);
}
} else {
removeTest(element.test);
}
};
script.setAttribute("type", "text/javascript");
script.setAttribute("src", element.url);
doc.appendChild(script);
that.loading[element.url] = function() {};
};
/// checking to see whether everything loaded properly
var removeTest = function(test) {
var ret = [];
for (var n = 0; n < batchTest.length; n ++) {
if (batchTest[n] === test) continue;
ret.push(batchTest[n]);
}
batchTest = ret;
};
var onLoad = function(element) {
if (element) {
testElement(element, element.test);
} else {
for (var n = 0; n < urls.length; n ++) {
testElement(urls[n], urls[n].test);
}
}
var istrue = true;
for (var n = 0; n < batchTest.length; n ++) {
if (globalExists(batchTest[n]) === false) {
istrue = false;
}
}
if (!config.strictOrder && istrue) { // finished loading all the requested scripts
if (hasError) {
if (config.error) {
config.error();
}
} else if (config.onsuccess) {
config.onsuccess();
}
} else { // keep calling back the function
setTimeout(function() { //- should get slower over time?
onLoad(element);
}, 10);
}
};
/// loading methods; strict ordering or loose ordering
if (config.strictOrder) {
var ID = -1;
var getNext = function() {
ID ++;
if (!urls[ID]) { // all elements are loaded
if (hasError) {
if (config.error) {
config.error();
}
} else if (config.onsuccess) {
config.onsuccess();
}
} else { // loading new script
var element = urls[ID];
var url = element.url;
if (that.loading[url]) { // already loading from another call (attach to event)
that.loading[url] = function() {
if (element.onsuccess) element.onsuccess();
getNext();
}
} else if (!that.loaded[url]) { // create script element
addElement(element);
onLoad(element);
} else { // it's already been successfully loaded
getNext();
}
}
};
getNext();
} else { // loose ordering
for (var ID = 0; ID < urls.length; ID ++) {
addElement(urls[ID]);
onLoad(urls[ID]);
}
}
};
dom.loadScript = new dom.loadScript();
var globalExists = function(path, root) {
try {
path = path.split('"').join('').split("'").join('').split(']').join('').split('[').join('.');
var parts = path.split(".");
var length = parts.length;
var object = root || window;
for (var n = 0; n < length; n ++) {
var key = parts[n];
if (object[key] == null) {
return false;
} else { //
object = object[key];
}
}
return true;
} catch(e) {
return false;
}
};
})();
/// For NodeJS
if (typeof (module) !== "undefined" && module.exports) {
module.exports = dom.loadScript;
}
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