File "burst.js"

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// TimeMe.js should be loaded and running to track time as soon as it is loaded.
let burst_track_hit_running = false;
let burst_initial_track_hit = false;
let burst_cookieless_option = burst.options.enable_cookieless_tracking; // User cookieless option
// add option to window so a consent plugin can change this value
window.burst_enable_cookieless_tracking = burst.options.enable_cookieless_tracking; // Consent plugin cookieless option
let burst_page_url = window.location.href;
let burst_completed_goals = [];
let burst_goals_script_url = burst.goals_script_url ? burst.goals_script_url : './burst-goals.js';

/**
 * Setup Goals if they exist for current page
 * @returns {Promise<void>}
 */
const burst_import_goals = async() => {
	const goals = await import( burst_goals_script_url );
	goals.default();
};

// If has goals and a goal has this page_url, import
if ( 0 < burst.goals.length ) {
	for ( let i = 0; i < burst.goals.length; i++ ) {
		if ( '' !== burst.goals[i].page_url || burst.goals[i].page_url === burst_page_url ) {
			burst_import_goals();
			break;
		}
	}
}

/**
 * Get a cookie by name
 * @param name
 * @returns {Promise}
 */
let burst_get_cookie = ( name ) => {
	return new Promise( ( resolve, reject ) => {
		name = name + '='; //Create the cookie name variable with cookie name concatenate with = sign
		let cArr = window.document.cookie.split( ';' ); //Create cookie array by split the cookie by ';'

		//Loop through the cookies and return the cookie value if we find the cookie name
		for ( let i = 0; i < cArr.length; i++ ) {
			let c = cArr[i].trim();

			//If the name is the cookie string at position 0, we found the cookie and return the cookie value
			if ( 0 === c.indexOf( name ) ) {
resolve( c.substring( name.length, c.length ) );
}
		}
		reject( false );
	});
};

/**
 * Set a cookie
 * @param name
 * @param value
 */
let burst_set_cookie = ( name, value ) => {
		let cookiePath = '/';
		let domain = '';
		let secure = ';secure';
		let date = new Date();
		let days = burst.cookie_retention_days;
		date.setTime( date.getTime() + ( days * 24 * 60 * 60 * 1000 ) );
		let expires = ';expires=' + date.toGMTString();

		if ( 'https:' !== window.location.protocol ) {
secure = '';
}

		//if we want to dynamically be able to change the domain, we can use this.
		if ( 0 < domain.length ) {
			domain = ';domain=' + domain;
		}
		document.cookie = name + '=' + value + ';SameSite=Strict' + secure + expires + domain + ';path=' + cookiePath;
};

/**
 * Should we use cookies for tracking
 * @returns {boolean}
 */
let burst_use_cookies = () => {
	if ( ! navigator.cookieEnabled ) {
return false;
} // cookies blocked by browser
	if ( burst_cookieless_option && window.burst_enable_cookieless_tracking ) {
return false;
} // cookieless is enabled by user or consent plugin
	return true; // cookies are enabled
};

/**
 * Enable or disable cookies
 * @returns {boolean}
 */
function burst_enable_cookies() {
	window.burst_enable_cookieless_tracking = 0;
	if ( burst_use_cookies() ) {
		burst_uid().then( obj => {
			burst_set_cookie( 'burst_uid', obj.uid ); // set uid cookie
		});
	}
}

/**
 * Get or set the user identifier
 * @returns {Promise}
 */
const burst_uid = () => {
	return new Promise( ( resolve ) => {
		burst_get_cookie( 'burst_uid' ).then( cookie_uid => {
			resolve( cookie_uid );
		}).catch( () => {

			// if no cookie, generate a uid and set it
			let uid  = burst_generate_uid();
			burst_set_cookie( 'burst_uid', uid );
			resolve( uid );
		});
	});
};

/**
 * Generate a random string
 * @returns {string}
 */
let burst_generate_uid = () => {
	let uid = '';
	for ( let i = 0; 32 > i; i++ ) {
		uid += Math.floor( Math.random() * 16 ).toString( 16 );
	}
	return uid;
};

/**
 * Generate a fingerprint
 * @returns {Promise}
 */
const burst_fingerprint = () => {
	return new Promise( ( resolve, reject ) => {
		let browserTests = [
			'availableScreenResolution',
			'canvas',
			'colorDepth',
			'cookies',
			'cpuClass',
			'deviceDpi',
			'doNotTrack',
			'indexedDb',
			'language',
			'localStorage',
			'pixelRatio',
			'platform',
			'plugins',
			'processorCores',
			'screenResolution',
			'sessionStorage',
			'timezoneOffset',
			'touchSupport',
			'userAgent',
			'webGl'
		];

		imprint.test( browserTests ).then( function( fingerprint ) {
			resolve( fingerprint );
		}).catch( ( error ) => {
			reject( error );
		});

	});
};

let burst_get_time_on_page = () => {
  return new Promise( ( resolve ) => {

    // wait for timeMe.js to be loaded
    if ( 'undefined' === typeof TimeMe ) {
      resolve( 0 ); // return 0 if timeMe.js is not (yet) loaded
    }

    let current_time_on_page = TimeMe.getTimeOnCurrentPageInMilliseconds();

    // reset time on page
    TimeMe.resetAllRecordedPageTimes();
    TimeMe.initialize({
      idleTimeoutInSeconds: 30 // seconds
    });
    resolve( current_time_on_page );

  });
};

/**
 * Check if this is a user agent
 * @returns {boolean}
 */
let burst_is_user_agent = () => {
	const botPattern = '(googlebot\/|bot|Googlebot-Mobile|Googlebot-Image|Google favicon|Mediapartners-Google|bingbot|slurp|java|wget|curl|Commons-HttpClient|Python-urllib|libwww|httpunit|nutch|phpcrawl|msnbot|jyxobot|FAST-WebCrawler|FAST Enterprise Crawler|biglotron|teoma|convera|seekbot|gigablast|exabot|ngbot|ia_archiver|GingerCrawler|webmon |httrack|webcrawler|grub.org|UsineNouvelleCrawler|antibot|netresearchserver|speedy|fluffy|bibnum.bnf|findlink|msrbot|panscient|yacybot|AISearchBot|IOI|ips-agent|tagoobot|MJ12bot|dotbot|woriobot|yanga|buzzbot|mlbot|yandexbot|purebot|Linguee Bot|Voyager|CyberPatrol|voilabot|baiduspider|citeseerxbot|spbot|twengabot|postrank|turnitinbot|scribdbot|page2rss|sitebot|linkdex|Adidxbot|blekkobot|ezooms|dotbot|Mail.RU_Bot|discobot|heritrix|findthatfile|europarchive.org|NerdByNature.Bot|sistrix crawler|ahrefsbot|Aboundex|domaincrawler|wbsearchbot|summify|ccbot|edisterbot|seznambot|ec2linkfinder|gslfbot|aihitbot|intelium_bot|facebookexternalhit|yeti|RetrevoPageAnalyzer|lb-spider|sogou|lssbot|careerbot|wotbox|wocbot|ichiro|DuckDuckBot|lssrocketcrawler|drupact|webcompanycrawler|acoonbot|openindexspider|gnam gnam spider|web-archive-net.com.bot|backlinkcrawler|coccoc|integromedb|content crawler spider|toplistbot|seokicks-robot|it2media-domain-crawler|ip-web-crawler.com|siteexplorer.info|elisabot|proximic|changedetection|blexbot|arabot|WeSEE:Search|niki-bot|CrystalSemanticsBot|rogerbot|360Spider|psbot|InterfaxScanBot|Lipperhey SEO Service|CC Metadata Scaper|g00g1e.net|GrapeshotCrawler|urlappendbot|brainobot|fr-crawler|binlar|SimpleCrawler|Livelapbot|Twitterbot|cXensebot|smtbot|bnf.fr_bot|A6-Indexer|ADmantX|Facebot|Twitterbot|OrangeBot|memorybot|AdvBot|MegaIndex|SemanticScholarBot|ltx71|nerdybot|xovibot|BUbiNG|Qwantify|archive.org_bot|Applebot|TweetmemeBot|crawler4j|findxbot|SemrushBot|yoozBot|lipperhey|y!j-asr|Domain Re-Animator Bot|AddThis)';
	let re = new RegExp( botPattern, 'i' );
	let userAgent = navigator.userAgent;

	return re.test( userAgent );
};

let burst_is_do_not_track = () => {
	if ( burst.options.do_not_track ) {

		// check for doNotTrack and globalPrivacyControl headers
		return '1' === navigator.doNotTrack || 'yes' === navigator.doNotTrack ||
				'1' === navigator.msDoNotTrack || '1' === window.doNotTrack || 1 === navigator.globalPrivacyControl;
	}
	return false;
};

/**
 * Make a XMLHttpRequest and return a promise
 * @param obj
 * @returns {Promise<unknown>}
 */
let burst_api_request = obj => {

	// generate a new token every request
	return new Promise( ( resolve, reject ) => {

		// if browser supports sendBeacon use it
		if ( burst.options.beacon_enabled ) {

			// send the request using sendBeacon
			window.navigator.sendBeacon( burst.beacon_url, JSON.stringify( obj.data ) );
			resolve( 'ok' );
		} else {
			let burst_token = 'token=' + Math.random().toString( 36 ).replace( /[^a-z]+/g, '' ).substring( 0, 7 );

			// if browser supports fetch keepalive, it will use it. Otherwise, it will use a normal XMLHttpRequest
			wp.apiFetch({
				path: '/burst/v1/track/?' + burst_token,
				keepalive: true,
				method: 'POST',
				data: obj.data
			}).then(
					( res ) => {
						if ( 202 === res.status ) {
							res.json().then(
									( data ) => console.warn( data )
							);
						}
					},
					( error ) => console.log( error )
			);
		}
	});
};

/**
 * Update the tracked hit
 * Mostly used for updating time spent on a page
 * Also used for updating the UID (from fingerprint to a cookie)
 */

async function burst_update_hit( update_uid = false ) {
	if ( burst_is_user_agent() ) {
return;
}
	if ( burst_is_do_not_track() ) {
return;
}
	if ( ! burst_initial_track_hit ) {
return;
}

	let event = new CustomEvent( 'burst_before_update_hit', {detail: burst});
	document.dispatchEvent( event );

	let data = {
		'fingerprint': false,
		'uid': false,
		'url': location.href,
		'time_on_page': await burst_get_time_on_page(),
		'completed_goals': burst_completed_goals
	};

	if ( update_uid ) {

		// add both the uid and the fingerprint to the data
		// this way we can update the fingerprint with the uid
		// this is useful for consent plugins
		data.uid = await burst_uid();
		data.fingerprint = await burst_fingerprint();
	} else if (	burst_use_cookies() ) {
		data.uid = await burst_uid();
	} else {
		data.fingerprint = await burst_fingerprint();
	}
	if ( 0 < data.time_on_page || false !== data.uid ) {
		await burst_api_request({
			data: JSON.stringify( data )
		}).catch( error => {

		}); // @todo handle error and send notice to the user. If multiple errors send to backend
	}
}

/**
 * Track a hit
 *
 */
async function burst_track_hit() {
	if ( burst_initial_track_hit ) { // if the initial track hit has already been fired, we just update the hit
		burst_update_hit();
		return;
	}
	burst_initial_track_hit = true;

	if ( burst_is_user_agent() ) {
return;
}
	if ( burst_is_do_not_track() ) {
return;
}
	if ( burst_track_hit_running ) {
return;
}


	burst_track_hit_running = true;
	let event = new CustomEvent( 'burst_before_track_hit', {detail: burst});
	document.dispatchEvent( event );

	// add browser data to the hit
	let data = {
		'uid': false,
		'fingerprint': false,
		'url': location.href,
		'page_id': burst.page_id,
		'referrer_url': document.referrer,
		'user_agent': navigator.userAgent || 'unknown',
		'device_resolution': window.screen.width * window.devicePixelRatio + 'x' + window.screen.height * window.devicePixelRatio,
		'time_on_page': await burst_get_time_on_page(),
		'completed_goals': burst_completed_goals
	};

	if ( burst_use_cookies() ) {
		data.uid = await burst_uid();
	} else {
		data.fingerprint = await burst_fingerprint();
	}

	event = new CustomEvent( 'burst_track_hit', {detail: data});
	document.dispatchEvent( event );

	let request_params = {
		method: 'POST',
		data: JSON.stringify( data )
	};
	burst_api_request( request_params ).catch( error => {
			burst_track_hit_running	= false;
		});

	burst_track_hit_running	= false;
}


/**
 * Initialize events
 * @returns {Promise<void>}
 *
 * More information on why we just use visibilitychange instead of beforeunload
 * to update the hits:
 * https://www.igvita.com/2015/11/20/dont-lose-user-and-app-state-use-page-visibility/
 *     https://developer.mozilla.org/en-US/docs/Web/API/Document/visibilitychange_event
 *     https://xgwang.me/posts/you-may-not-know-beacon/#the-confusion
 *
 */
function burst_init_events() {

	// Initial track hit
	let turbo_mode = burst.options.enable_turbo_mode;
	if ( turbo_mode ) { // if turbo mode is enabled, we track the hit after the whole page has loaded
		if ( 'loading' !== document.readyState ) {
burst_track_hit();
} else {
document.addEventListener( 'load', burst_track_hit );
}
	} else { // if default, we track the hit immediately
		burst_track_hit();
	}

	// Update hit on visibility change (Navigating away from the page)
	// Supported by most browsers
	document.addEventListener( 'visibilitychange', function() {
		if (
				'hidden' === document.visibilityState ||
				'unloaded' === document.visibilityState

		) {
			burst_update_hit();
		}
	});

	// This is a fallback for Safari
	document.addEventListener( 'pagehide', burst_update_hit );

	// Add event so other plugins can add their own events
	document.addEventListener( 'burst_fire_hit', function() {
		burst_track_hit();
	});

	// add event so other plugins can add their own events
	document.addEventListener( 'burst_enable_cookies', function() {
		burst_enable_cookies();
		burst_update_hit( true );
	});
}
burst_init_events();