https://rynko.it/analytics/count.js

1// GoatCounter: https://www.goatcounter.com
2// This file is released under the ISC license: https://opensource.org/licenses/ISC
3;(function() {
4	'use strict';
5
6	window.goatcounter = window.goatcounter || {}
7
8	// Load settings from data-goatcounter-settings.
9	var s = document.querySelector('script[data-goatcounter]')
10	if (s && s.dataset.goatcounterSettings) {
11		try         { var set = JSON.parse(s.dataset.goatcounterSettings) }
12		catch (err) { console.error('invalid JSON in data-goatcounter-settings: ' + err) }
13		for (var k in set)
14			if (['no_onload', 'no_events', 'allow_local', 'allow_frame', 'path', 'title', 'referrer', 'event'].indexOf(k) > -1)
15				window.goatcounter[k] = set[k]
16	}
17
18	var enc = encodeURIComponent
19
20	// Get all data we're going to send off to the counter endpoint.
21	window.goatcounter.get_data = function(vars) {
22		vars = vars || {}
23		var data = {
24			p: (vars.path     === undefined ? goatcounter.path     : vars.path),
25			r: (vars.referrer === undefined ? goatcounter.referrer : vars.referrer),
26			t: (vars.title    === undefined ? goatcounter.title    : vars.title),
27			e: !!(vars.event || goatcounter.event),
28			s: window.screen.width,
29			b: is_bot(),
30			q: location.search,
31		}
32
33		var rcb, pcb, tcb  // Save callbacks to apply later.
34		if (typeof(data.r) === 'function') rcb = data.r
35		if (typeof(data.t) === 'function') tcb = data.t
36		if (typeof(data.p) === 'function') pcb = data.p
37
38		if (is_empty(data.r)) data.r = document.referrer
39		if (is_empty(data.t)) data.t = document.title
40		if (is_empty(data.p)) data.p = get_path()
41

42		if (rcb) data.r = rcb(data.r)
43		if (tcb) data.t = tcb(data.t)
44		if (pcb) data.p = pcb(data.p)
45		return data
46	}
47
48	// Check if a value is "empty" for the purpose of get_data().
49	var is_empty = function(v) { return v === null || v === undefined || typeof(v) === 'function' }
50
51	// See if this looks like a bot; there is some additional filtering on the
52	// backend, but these properties can't be fetched from there.
53	var is_bot = function() {
54		// Headless browsers are probably a bot.
55		var w = window, d = document
56		if (w.callPhantom || w._phantom || w.phantom)
57			return 150
58		if (w.__nightmare)
59			return 151
60		if (d.__selenium_unwrapped || d.__webdriver_evaluate || d.__driver_evaluate)
61			return 152
62		if (navigator.webdriver)
63			return 153
64		return 0
65	}
66
67	// Object to urlencoded string, starting with a ?.
68	var urlencode = function(obj) {
69		var p = []
70		for (var k in obj)
71			if (obj[k] !== '' && obj[k] !== null && obj[k] !== undefined && obj[k] !== false)
72				p.push(enc(k) + '=' + enc(obj[k]))
73		return '?' + p.join('&')
74	}
75
76	// Show a warning in the console.
77	var warn = function(msg) {
78		if (console && 'warn' in console)
79			console.warn('goatcounter: ' + msg)
80	}
81
82	// Get the endpoint to send requests to.
83	var get_endpoint = function() {
84		var s = document.querySelector('script[data-goatcounter]')
85		return (s && s.dataset.goatcounter) ? s.dataset.goatcounter : goatcounter.endpoint
86	}
87
88	// Get current path.
89	var get_path = function() {
90		var loc = location,
91			c = document.querySelector('link[rel="canonical"][href]')
92		if (c) {  // May be relative or point to different domain.
93			var a = document.createElement('a')
94			a.href = c.href
95			if (a.hostname.replace(/^www\./, '') === location.hostname.replace(/^www\./, ''))
96				loc = a
97		}
98		return (loc.pathname + loc.search) || '/'
99	}
100
101	// Run function after DOM is loaded.
102	var on_load = function(f) {
103		if (document.body === null)
104			document.addEventListener('DOMContentLoaded', function() { f() }, false)
105		else
106			f()
107	}
108
109	// Filter some requests that we (probably) don't want to count.
110	window.goatcounter.filter = function() {
111		if ('visibilityState' in document && document.visibilityState === 'prerender')
112			return 'visibilityState'
113		if (!goatcounter.allow_frame && location !== parent.location)
114			return 'frame'
115		if (!goatcounter.allow_local && location.hostname.match(/(localhost$|^127\.|^10\.|^172\.(1[6-9]|2[0-9]|3[0-1])\.|^192\.168\.|^0\.0\.0\.0$)/))
116			return 'localhost'
117		if (!goatcounter.allow_local && location.protocol === 'file:')
118			return 'localfile'
119		if (localStorage && localStorage.getItem('skipgc') === 't')
120			return 'disabled with #toggle-goatcounter'
121		return false
122	}
123
124	// Get URL to send to GoatCounter.
125	window.goatcounter.url = function(vars) {
126		var data = window.goatcounter.get_data(vars || {})
127		if (data.p === null)  // null from user callback.
128			return
129		data.rnd = Math.random().toString(36).substr(2, 5)  // Browsers don't always listen to Cache-Control.
130
131		var endpoint = get_endpoint()
132		if (!endpoint)
133			return warn('no endpoint found')
134
135		return endpoint + urlencode(data)
136	}
137
138	// Count a hit.
139	window.goatcounter.count = function(vars) {
140		var f = goatcounter.filter()
141		if (f)
142			return warn('not counting because of: ' + f)
143		var url = goatcounter.url(vars)
144		if (!url)
145			return warn('not counting because path callback returned null')
146
147		if (!navigator.sendBeacon(url)) {
148			// This mostly fails due to being blocked by CSP; try again with an
149			// image-based fallback.
150			var img = document.createElement('img')
151			img.src = url
152			img.style.position = 'absolute'  // Affect layout less.
153			img.style.bottom = '0px'
154			img.style.width = '1px'
155			img.style.height = '1px'
156			img.loading = 'eager'
157			img.setAttribute('alt', '')
158			img.setAttribute('aria-hidden', 'true')
159
160			var rm = function() { if (img && img.parentNode) img.parentNode.removeChild(img) }
161			img.addEventListener('load', rm, false)
162			document.body.appendChild(img)
163		}
164	}
165
166	// Get a query parameter.
167	window.goatcounter.get_query = function(name) {
168		var s = location.search.substr(1).split('&')
169		for (var i = 0; i < s.length; i++)
170			if (s[i].toLowerCase().indexOf(name.toLowerCase() + '=') === 0)
171				return s[i].substr(name.length + 1)
172	}
173
174	// Track click events.
175	window.goatcounter.bind_events = function() {
176		if (!document.querySelectorAll)  // Just in case someone uses an ancient browser.
177			return
178
179		var send = function(elem) {
180			return function() {
181				goatcounter.count({
182					event:    true,
183					path:     (elem.dataset.goatcounterClick || elem.name || elem.id || ''),
184					title:    (elem.dataset.goatcounterTitle || elem.title || (elem.innerHTML || '').substr(0, 200) || ''),
185					referrer: (elem.dataset.goatcounterReferrer || elem.dataset.goatcounterReferral || ''),
186				})
187			}
188		}
189
190		Array.prototype.slice.call(document.querySelectorAll("*[data-goatcounter-click]")).forEac

190h(function(elem) {
191			if (elem.dataset.goatcounterBound)
192				return
193			var f = send(elem)
194			elem.addEventListener('click', f, false)
195			elem.addEventListener('auxclick', f, false)  // Middle click.
196			elem.dataset.goatcounterBound = 'true'
197		})
198	}
199
200	// Add a "visitor counter" frame or image.
201	window.goatcounter.visit_count = function(opt) {
202		on_load(function() {
203			opt        = opt        || {}
204			opt.type   = opt.type   || 'html'
205			opt.append = opt.append || 'body'
206			opt.path   = opt.path   || get_path()
207			opt.attr   = opt.attr   || {width: '200', height: (opt.no_branding ? '60' : '80')}
208
209			opt.attr['src'] = get_endpoint() + 'er/' + enc(opt.path) + '.' + enc(opt.type) + '?'
210			if (opt.no_branding) opt.attr['src'] += '&no_branding=1'
211			if (opt.style)       opt.attr['src'] += '&style=' + enc(opt.style)
212			if (opt.start)       opt.attr['src'] += '&start=' + enc(opt.start)
213			if (opt.end)         opt.attr['src'] += '&end='   + enc(opt.end)
214
215			var tag = {png: 'img', svg: 'img', html: 'iframe'}[opt.type]
216			if (!tag)
217				return warn('visit_count: unknown type: ' + opt.type)
218
219			if (opt.type === 'html') {
220				opt.attr['frameborder'] = '0'
221				opt.attr['scrolling']   = 'no'
222			}
223
224			var d = document.createElement(tag)
225			for (var k in opt.attr)
226				d.setAttribute(k, opt.attr[k])
227
228			var p = document.querySelector(opt.append)
229			if (!p)
230				return warn('visit_count: element to append to not found: ' + opt.append)
231			p.appendChild(d)
232		})
233	}
234
235	// Make it easy to skip your own views.
236	if (location.hash === '#toggle-goatcounter') {
237		if (localStorage.getItem('skipgc') === 't') {
238			localStorage.removeItem('skipgc', 't')
239			alert('GoatCounter tracking is now ENABLED in this browser.')
240		}
241		else {
242			localStorage.setItem('skipgc', 't')
243			alert('GoatCounter tracking is now DISABLED in this browser until ' + location + ' is loaded again.')
244		}
245	}
246
247	if (!goatcounter.no_onload)
248		on_load(function() {
249			// 1. Page is visible, count request.
250			// 2. Page is not yet visible; wait until it switches to 'visible' and count.
251			// See #487
252			if (!('visibilityState' in document) || document.visibilityState === 'visible')
253				goatcounter.count()
254			else {
255				var f = function(e) {
256					if (document.visibilityState !== 'visible')
257						return
258					document.removeEventListener('visibilitychange', f)
259					goatcounter.count()
260				}
261				document.addEventListener('visibilitychange', f)
262			}
263
264			if (!goatcounter.no_events)
265				goatcounter.bind_events()
266		})
267})();