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