window.archive_analytics=function defineArchiveAnalytics(){var Date=window.Date;var ARCHIVE_ANALYTICS_VERSION=2;var DEFAULT_SERVICE="ao_2";var NO_SAMPLING_SERVICE="ao_no_sampling";var startTime=new Date;function isPerformanceTimingApiSupported(){return"performance"in window&&"timing"in window.performance}function getLoadTime(){var start;if(isPerformanceTimingApiSupported())start=window.performance.timing.domLoading;else start=startTime.getTime();return(new Date).getTime()-start}function getNavToDoneTime(){if(!isPerformanceTimingApiSupported())return null;return(new Date).getTime()-window.performance.timing.navigationStart}function computeWithUnit(original,doOperation){var number=parseFloat(original,10);var unit=original.replace(/(\d*\.\d+)|\d+/,"");return doOperation(number)+unit}function getDefaultFontSize(){var fontSizeStr;if(!("getComputedStyle"in window))return null;var style=window.getComputedStyle(document.documentElement);if(!style)return null;fontSizeStr=style.fontSize;if(document.querySelector("#BookReader"))return fontSizeStr;return computeWithUnit(fontSizeStr,function reverseBootstrapFontSize(number){return number*1.6})}function getParams(location){if(!location)location=window.location;var vars;var i;var pair;var params={};var query=location.search;if(!query)return params;vars=query.substring(1).split("&");for(i=0;i<vars.length;i++){pair=vars[i].split("=");params[pair[0]]=decodeURIComponent(pair[1])}return params}function getMetaProp(name){var metaTag=document.querySelector("meta[property="+name+"]");return metaTag?metaTag.getAttribute("content")||null:null}var ArchiveAnalytics={service:getMetaProp("service"),mediaType:getMetaProp("mediatype"),primaryCollection:getMetaProp("primary_collection"),values:{},send_ping:function send_ping(values,onload_callback,augment_for_ao_site){if(typeof window.navigator!=="undefined"&&typeof window.navigator.sendBeacon!=="undefined")this.send_ping_via_beacon(values);else this.send_ping_via_image(values)},send_ping_via_beacon:function send_ping_via_beacon(values){var url=this.generate_tracking_url(values||{});window.navigator.sendBeacon(url)},send_ping_via_image:function send_ping_via_image(values){var url=this.generate_tracking_url(values||{});var loadtime_img=new Image(1,1);loadtime_img.src=url;loadtime_img.alt=""},generate_tracking_url:function generate_tracking_url(params){var baseUrl="//analytics.archive.org/0.gif";var keys;var outputParams=params;var outputParamsArray=[];outputParams.service=outputParams.service||this.service||DEFAULT_SERVICE;keys=Object.keys(outputParams);keys.forEach(function keyIteration(key){outputParamsArray.push(encodeURIComponent(key)+"="+encodeURIComponent(outputParams[key]))});outputParamsArray.push("version="+ARCHIVE_ANALYTICS_VERSION);outputParamsArray.push("count="+(keys.length+2));return baseUrl+"?"+outputParamsArray.join("&")},send_scroll_fetch_event:function send_scroll_fetch_event(page){var additionalValues={ev:page};var loadTime=getLoadTime();var navToDoneTime=getNavToDoneTime();if(loadTime)additionalValues.loadtime=loadTime;if(navToDoneTime)additionalValues.nav_to_done_ms=navToDoneTime;this.send_event("page_action","scroll_fetch",location.pathname,additionalValues)},send_scroll_fetch_base_event:function send_scroll_fetch_base_event(){var additionalValues={};var loadTime=getLoadTime();var navToDoneTime=getNavToDoneTime();if(loadTime)additionalValues.loadtime=loadTime;if(navToDoneTime)additionalValues.nav_to_done_ms=navToDoneTime;this.send_event("page_action","scroll_fetch_base",location.pathname,additionalValues)},send_pageview:function send_pageview(options){var settings=options||{};var defaultFontSize;var loadTime=getLoadTime();var mediaType=settings.mediaType;var primaryCollection=settings.primaryCollection;var page=settings.page;var navToDoneTime=getNavToDoneTime();function get_locale(){if(navigator){if(navigator.language)return navigator.language;else if(navigator.browserLanguage)return navigator.browserLanguage;else if(navigator.systemLanguage)return navigator.systemLanguage;else if(navigator.userLanguage)return navigator.userLanguage}return""}defaultFontSize=getDefaultFontSize();this.values.kind="pageview";this.values.timediff=(new Date).getTimezoneOffset()/60*-1;this.values.locale=get_locale();this.values.referrer=document.referrer==""?"-":document.referrer;if(loadTime)this.values.loadtime=loadTime;if(navToDoneTime)this.values.nav_to_done_ms=navToDoneTime;if(settings.trackingId){this.values.ga_tid=settings.trackingId}if(defaultFontSize)this.values.ga_cd1=defaultFontSize;if("devicePixelRatio"in window)this.values.ga_cd2=window.devicePixelRatio;if(mediaType)this.values.ga_cd3=mediaType;if(settings.mediaLanguage){this.values.ga_cd4=settings.mediaLanguage}if(primaryCollection){this.values.ga_cd5=primaryCollection}if(page)this.values.page=page;this.send_ping(this.values)},send_event:function send_event(category,action,label,additionalEventParams){if(!label)label=window.location.pathname;if(!additionalEventParams)additionalEventParams={};if(additionalEventParams.mediaLanguage){additionalEventParams.ga_cd4=additionalEventParams.mediaLanguage;delete additionalEventParams.mediaLanguage}var eventParams=Object.assign({kind:"event",ec:category,ea:action,el:label,cache_bust:Math.random()},additionalEventParams);this.send_ping(eventParams)},send_event_no_sampling:function send_event_no_sampling(category,action,label,additionalEventParams){var extraParams=additionalEventParams||{};extraParams.service=NO_SAMPLING_SERVICE;this.send_event(category,action,label,extraParams)},send_pageview_on_load:function send_pageview_on_load(options){var self=this;window.addEventListener("load",function send_pageview_with_options(){self.send_pageview(options)})},process_url_events:function process_url_events(location){var eventValues;var actionValue;var eventValue=getParams(location).iax;if(!eventValue)return;eventValues=eventValue.split("|");actionValue=eventValues.length>=1?eventValues[1]:"";this.send_event_no_sampling(eventValues[0],actionValue,window.location.pathname)},set_up_event_tracking:function set_up_event_tracking(){var self=this;var clickTrackingAttributeName="event-click-tracking";var formTrackingAttributeName="event-form-tracking";var trackingOptionsAttributeName="event-tracking-options";function handleAction(event,attributeName){var selector="[data-"+attributeName+"]";var eventTarget=event.target;if(!eventTarget)return;var target=eventTarget.closest(selector);if(!target)return;var categoryAction;var categoryActionParts;var options;categoryAction=target.dataset[toCamelCase(attributeName)];if(!categoryAction)return;categoryActionParts=categoryAction.split("|");options=target.dataset[toCamelCase(trackingOptionsAttributeName)];options=options?JSON.parse(options):{};self.send_event(categoryActionParts[0],categoryActionParts[1],categoryActionParts[2]||window.location.pathname,options.service?{service:options.service}:{})}function toCamelCase(str){return str.replace(/\W+(.)/g,function(match,chr){return chr.toUpperCase()})}document.addEventListener("click",function(e){handleAction(e,clickTrackingAttributeName)});document.addEventListener("submit",function(e){handleAction(e,formTrackingAttributeName)})},get_data_packets:function get_data_packets(){return[this.values]},create_tracking_image:function create_tracking_image(type){this.send_ping_via_image({cache_bust:Math.random(),kind:"track_js",track_js_case:type})}};return ArchiveAnalytics}();