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var currentlyloaded = [];
/**
* Loads the data for the clicked navigation item.
*
* @param {Object} clickednode The jquery object for the clicked node.
*/
function handleClick(clickednode) {
var contextcrumb = '';
var parentnodes = clickednode.parents('li');
for (var i = parentnodes.length; i >= 0; i--) {
var treenodes = window.$(parentnodes[i]);
if (treenodes.hasClass('item')) {
if (contextcrumb == '') {
contextcrumb = treenodes[0].innerText;
} else {
contextcrumb = contextcrumb + ' | ' + treenodes[0].innerText;
}
} else if (treenodes.hasClass('menu-item')) {
if (contextcrumb == '') {
contextcrumb = treenodes[0].firstChild.textContent;
} else {
contextcrumb = contextcrumb + ' | ' + treenodes[0].firstChild.textContent;
}
}
}
var datafile = clickednode.attr('data-var');
loadContent(datafile, function() {
addFileDataToMainArea(window[datafile], contextcrumb);
});
}
/**
* Load content to be displayed.
*
* @param {String} datafile The json data to be displayed.
* @param {Function} callback The function to run after loading the json file.
*/
function loadContent(datafile, callback) {
// Check to see if this file has already been loaded. If so just go straight to the callback.
if (fileIsLoaded(datafile)) {
callback();
return;
}
// This (user_data_index) is defined in data_index.js
var data = window.user_data_index[datafile];
var newscript = document.createElement('script');
if (newscript.readyState) {
newscript.onreadystatechange = function() {
if (this.readyState == 'complete' || this.readyState == 'loaded') {
this.onreadystatechange = null;
callback();
}
};
} else {
newscript.onload = function() {
callback();
};
}
newscript.type = 'text/javascript';
var dataParts = data.split('/');
dataParts.forEach(function(part, index) {
this[index] = encodeURIComponent(part);
}, dataParts);
newscript.src = dataParts.join('/');
newscript.charset = 'utf-8';
document.getElementsByTagName("head")[0].appendChild(newscript);
// Keep track that this file has already been loaded.
currentlyloaded.push(datafile);
}
/**
* Checks to see if the datafile has already been loaded onto the page or not.
*
* @param {String} datafile The file entry we are checking to see if it is already loaded.
* @return {Boolean} True if already loaded otherwise false.
*/
function fileIsLoaded(datafile) {
for (var index in currentlyloaded) {
if (currentlyloaded[index] == datafile) {
return true;
}
}
return false;
}
/**
* Adds the loaded data to the main content area of the page.
*
* @param {Object} data Data to be added to the main content area of the page.
* @param {String} title Title for the content area.
*/
function addFileDataToMainArea(data, title) {
var dataarea = window.$('[data-main-content]');
while (dataarea[0].firstChild) {
dataarea[0].removeChild(dataarea[0].firstChild);
}
var htmldata = makeList(data);
var areatitle = document.createElement('h2');
areatitle.innerHTML = title;
dataarea[0].appendChild(areatitle);
var maincontentlist = document.createElement('div');
maincontentlist.innerHTML = htmldata;
dataarea[0].appendChild(maincontentlist.firstChild);
}
/**
* Creates an unordered list with the json data provided.
*
* @param {Object} jsondata The json data to turn into an unordered list.
* @return {String} The html string of the unordered list.
*/
function makeList(jsondata) {
var html = '<ul>';
for (var key in jsondata) {
html += '<li>';
if (typeof jsondata[key] == 'object') {
html += key;
html += makeList(jsondata[key]);
} else {
html += key + ': ' + jsondata[key];
}
html += '</li>';
}
html += '</ul>';
return html;
}
window.$(document).ready(function() {
window.$('[data-var]').click(function(e) {
e.preventDefault();
e.stopPropagation();
handleClick(window.$(this));
});
});