gasl.js

// ------------------------------------------------------------

/* 
Google Analytics for Storyline (GASL)
Copyright 2015, Mark Hicken
Dual licensed under the MIT or GPL Version 2 licenses.

Version: 1.0.32
Date: 8/24/2015

Usage and other information at https://github.com/nekcih/GASL
*/

// ------------------------------------------------------------

if(!gaConfig) {
	// UPDATE THIS CONFIG
	var gaConfig = {
		prodUrls: ['www.mydomain1.com', 'www.mydomain2.com'], // list of URLs that will use gaPropertyId_prod
		gaPropertyId_dev: 'UA-XXXXXXXX-X', // development GA property id
		gaPropertyId_prod: 'UA-XXXXXXXX-X', // production GA property id (used on port 80)
		basePath: '/', // root path in GA - should be the same for all courses
		courseUniqueId: '', // should be a unique identifier for the course (course-activity-code from the LMS)
		trackOutsideLMS: false, // send tracking to GA if SCORM API is not present
		debug: false // controls logging. Allowed values: true, false, 'verbose'
	};

	// ----------------------------------------------------------------------------

	// Load Google Analytics Script
	(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
	(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
	m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
	})(window,document,'script','//www.google-analytics.com/analytics.js','ga');

	// ----------------------------------------------------------------------------

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	// ----------------------------------------------------------------------------

	gasl = {
		bLMS_presentOnInit: false,

		currentSlideInfo: null,
		aSceneInfo: [],
		aSlideInfo: [],

		init: function() {
			var _self = this;

			// validate config before continuing
			if(!_self.validateConfig()) { return false; }

			// Initialize GA (depends on polyfills in IE)
			var environment = (new RegExp(gaConfig.prodUrls.join('|'), 'gi').test(location.href)) ? 'prod': 'dev';
			var gaId = (environment=='prod') ? gaConfig.gaPropertyId_prod : gaConfig.gaPropertyId_dev;
			if(gaConfig.debug == 'verbose') { console.log('gasl: Initializing Google Analytics using ' + environment + ' id: ' + gaId); }
			ga('create', gaId, 'auto');

			// redirect to LMS version if necessary
			// this causes storyline to use the SCORM functions
			var sHref = window.location.href;
			if(gaConfig.trackOutsideLMS && sHref.indexOf('story_html5.html')!=-1) {
				window.location.replace('index_lms_html5.html?standalone=true');
			}

			// load slide data and then hook into SCORM and storyline for automatic pageView tracking
			_self.getSlideInfoFromXml(function(){ 
				if(gaConfig.trackOutsideLMS || _self.bLMS_presentOnInit) {
					_self.overrideStoryline();
				}
				else {
					if(gaConfig.debug){ console.log('No LMS API found and trackOutsideLMS is not set to true - no tracking will occur'); }
				}
			});
		},

		validateConfig: function(){
			var bValid = true;

			// convert string to array if necessary
			if(typeof(gaConfig.prodUrls)=='string') { gaConfig.prodUrls = [gaConfig.prodUrls]; }
			// filter invalid values from urls
			gaConfig.prodUrls = gaConfig.prodUrls.filter(function(item){ return (typeof(item)=='string' && item.length); });
			if(!gaConfig.prodUrls.length) { 
				if(gaConfig.debug) { console.log('gaConfig.prodUrls is invalid'); }
				bValid = false; 
			}
			if(!gaConfig.gaPropertyId_dev.length || !/(UA|YT|MO)-\d+-\d+/i.test(gaConfig.gaPropertyId_dev)) { 
				if(gaConfig.debug) { console.log('gaConfig.gaPropertyId_dev is invalid'); }
				bValid = false;
			}
			if(gaConfig.gaPropertyId_prod.length) {
				if(!/(UA|YT|MO)-\d+-\d+/i.test(gaConfig.gaPropertyId_prod)) { 
					if(gaConfig.debug) { console.log('gaConfig.gaPropertyId_prod is invalid'); }
					bValid = false;
				}
			}
			if(!typeof(gaConfig.courseUniqueId)=='string' || !gaConfig.courseUniqueId.length) { 
				if(gaConfig.debug) { console.log('gaConfig.courseUniqueId is invalid'); }
				bValid = false; 
			}

			return bValid;
		},

		// loads slide data from nav in frame.xml and builds scene/slide arrays
		getSlideInfoFromXml: function(fSuccess){
			var _self = this;
			// load slide info
			var jqxhr = $.get('story_content/frame.xml')
			.done(function(data) {
				if(data) {
					// reset data
					_self.aSceneInfo = [];
					_self.aSlideInfo = [];

					// build scenes and slides for GA tracking
					var $scenes = $('nav_data > outline > links > slidelink', data);
					$scenes.each(function(iScene, scene){
						// EX: <slidelink slideid="_player.[Scene ID]" displaytext="[Scene Title]" />
						var sSceneId = $(scene).attr('slideid').replace('_player.', '');
						var sSceneTitle = $(scene).attr('displaytext');
						var oScene = { id:sSceneId, title:sSceneTitle, index:iScene+1, slides:[] };

						var $slides = $(scene).find('links > slidelink');
						$slides.each(function(iSlide, slide){
							// EX: <slidelink slideid="_player.[Scene ID].[Slide ID]" displaytext="[Slide Title]" />
							var sId = $(slide).attr('slideid').replace('_player.', '');
							var sTitle = $(slide).attr('displaytext');
							var sPath = gaConfig.basePath + gaConfig.courseUniqueId + '/' + _self.sanitizePath(sTitle) + '/';
							var oSlide = { id:sId, title:sTitle, path:sPath, index:iSlide+1, scene:oScene };
							oScene.slides.push(oSlide);
							_self.aSlideInfo.push(oSlide);
						});

						_self.aSceneInfo.push(oScene);
					});

					if(typeof fSuccess == 'function') { fSuccess.apply(_self); } // run callback in the original context
				}
			})
			.fail(function(error) {
				if(gaConfig.debug) {
					console.log('gasl: Error loading Storyline slide data: ' + error.statusText);
					console.log('      No data will be sent to Google Analytics.'); 
					console.log('      Ensure you have enabled navigation before publishing.');
				}
			});
		},

		// sPath: required
		// sTitle: optional
		trackPageview: function(sPath, sTitle) {
			var _self = this;
			if(gaConfig.trackOutsideLMS || _self.bLMS_presentOnInit) {
				var oPage = _self.currentSlideInfo;
				if(!sTitle && oPage && oPage.title) { var sTitle = oPage.title; }
				if(!sPath && oPage && oPage.path) { var sPath = oPage.path; }

				if(gaConfig.debug) { console.log('gasl: trackPageview', sPath, sTitle); }
				if(sTitle && sTitle.length && sPath && sPath.length) {
					ga('send', 'pageview', { page: sPath, title: sTitle });
				}
				else if(sPath && sPath.length) {
					ga('send', 'pageview', sPath);
				}
			}
		},
		// category: question/event type
		// action: name of action taken
		// label: where the action was taken
		trackEvent: function(sCategory, sAction, sLabel, eventData) {
			var _self = this;
			if(gaConfig.trackOutsideLMS || _self.bLMS_presentOnInit) {
				var sLabel = sLabel || '';
				var eventData = eventData || 1;
				var oPage = _self.currentSlideInfo;

				if(gaConfig.debug) { console.log('gasl: trackEvent', sCategory, sAction, sLabel, eventData, oPage); }
				if(sCategory && sAction && sLabel && eventData) {
					if(oPage) { ga('send', 'event', sCategory, sAction, sLabel, eventData, { page: oPage.path }); }
					else { ga('send', 'event', sCategory, sAction, sLabel, eventData); }
				}
			}
		},

		overrideStoryline: function() {
			var _self = this;
			if(gaConfig.debug == 'verbose') { console.log('gasl: Overriding Storyline Functions'); }

			// force enable LMS on the SWF file by reloading it with the LMS param turned on
			var $player = $('object#player');
			if($player.length) {
				var sHtml = $player.parent().html();
				_self.bLMS_presentOnInit = (sHtml.indexOf('vLMSPresent=false')==-1);
				if(gaConfig.trackOutsideLMS && !_self.bLMS_presentOnInit) {
					sHtml = sHtml.replace(/vLMSPresent=false/g, 'vLMSPresent=true');
					$player.parent().html(sHtml);
				}       
			}

			// LMS commands
			// Storyline doesn't send the expected SCORM commands. Instead it, saves everything in a compressed
			// cmi.suspend_data string which is only uncompressible using the run-time environment. This makes it
			// difficult to track much other than the page views automatically.
			if(typeof window.lms_DoFSCommand != 'undefined') {
				var lms_DoFSCommand_original = window.lms_DoFSCommand;
				window.lms_DoFSCommand = function lms_DoFSCommand_GA(command, args) {
					if(gaConfig.debug == 'verbose') { console.log('gasl: lms_DoFSCommand', command, args); }

					// handle initial pageView
					if(command=='BW_RestoreFocus') { command = 'BW_SetResumeData'; }

					// handle automatic pageview tracking
					if(command=='BW_SetResumeData'){
						var slideInfo = _self.getSlideInfoFromResumeData(args);
						if(slideInfo) {
							if(!_self.currentSlideInfo || (slideInfo != _self.currentSlideInfo)) {
								_self.currentSlideInfo = slideInfo; // prevents multiple page views when page hasn't changed
								_self.trackPageview(slideInfo.path, slideInfo.title);
							}
						}
						else { _self.currentSlideInfo = null; } // prevents events from tracking on the wrong page
					}

					// TODO: handle course completion status change
					if(command == 'BW_UpdateViewStatus'){
						// var g_strLDelim = "|~|";
						// var g_strLInteractionDelim = "|#|";
						// pass|~|view
					}

					return lms_DoFSCommand_original(command, args); // execute original code
				}
			}
		},

		getSlideInfoFromResumeData: function(sResumeData) {
			var _self = this;
			var found = null;
			_self.aSlideInfo.forEach(function(item, i){
				if(sResumeData.indexOf(item.id)!=-1) { found = item; }
			});
			// if it wasn't found and the resume data is short we are probably on slide 1
			if(!found && sResumeData.indexOf('.')==-1) { found = _self.aSlideInfo[0]; }
			return found;
		},

		sanitizePath: function(sPath) {
			return sPath.replace(/[^a-z0-9\.\-\?\#\,]/gi, '_');
		}
	};

	// init
	$(function(){ gasl.init(); });

	// polyfills for IE
	Array.prototype.forEach||(Array.prototype.forEach=function(r,t){var o,n;if(null==this)throw new TypeError(" this is null or not defined");var e=Object(this),i=e.length>>>0;if("function"!=typeof r)throw new TypeError(r+" is not a function");for(arguments.length>1&&(o=t),n=0;i>n;){var a;n in e&&(a=e[n],r.call(o,a,n,e)),n++}});
	Array.prototype.filter||(Array.prototype.filter=function(r){"use strict";if(void 0===this||null===this)throw new TypeError;var t=Object(this),e=t.length>>>0;if("function"!=typeof r)throw new TypeError;for(var i=[],o=arguments.length>=2?arguments[1]:void 0,n=0;e>n;n++)if(n in t){var f=t[n];r.call(o,f,n,t)&&i.push(f)}return i});
}