/*global exports: false, require: false */
/*jslint onevar: false */
// Released under the MIT/X11 license
// http://www.opensource.org/licenses/mit-license.php
"use strict";
// ==============================================================
var xhrMod = require("xhr");
var urlMod = require("url");
/**
* Function for the management of the prototypal inheritace
* David Flanagan, Javascript: The Definitve Guide,
* IV. edition, O'Reilly, 2006, p. 168
*
* @param superobject
* @return new object, it needs new prototype.constructor
*
* <pre>
* function Father(x) {
* this.family = x;
* }
*
* function Son(x,w) {
* Father.call(this,x);
* this.wife = w;
* }
* Son.prototype = heir(Father);
* Son.prototype.constructor = Son;
* </pre>
*/
exports.heir = function heir(p) {
function f() {};
f.prototype = p.prototype;
return new f();
};
var getBugNo = exports.getBugNo = function getBugNo(url) {
var re = new RegExp(".*id=([0-9]+).*$");
var bugNo = null;
if (!url) {
throw new Error("Missing URL value!");
}
var reResult = re.exec(url);
if (reResult[1]) {
bugNo = reResult[1];
}
return bugNo;
};
/**
* Load text from URL
*
* @param URL String
* @param cb_function Function to be called when the download happens with
* the downloaded body of the HTTP message as the only parameter
* @param what optional Object argument representing this for this call
* @return none
*/
var loadText = exports.loadText = function loadText(URL, cb_function, what) {
if (what === undefined) { // missing optional argument
what = this;
}
var req = new xhrMod.XMLHttpRequest();
req.open("GET", URL, true);
req.onreadystatechange = function (aEvt) {
if (req.readyState === 4) {
if (req.status === 200) {
cb_function.call(what, req.responseText);
} else {
throw "Getting " + URL + "failed!";
}
}
};
req.send("");
};
/**
* Load JSON from URL
*
* @param URL String
* @param cb_function Function to be called when the download happens with
* the downloaded JSON as the only parameter
* @param what optional Object argument representing this for this call
* @return none
*/
exports.loadJSON = function loadJSON(URL, cb_function, what) {
if (what === undefined) { // missing optional argument
what = this;
}
loadText(URL, function (text) {
var data = JSON.parse(text);
cb_function.call(what, data);
}, what);
};
