https://analytics.xonotic.org/count.js

1// GoatCounter: https://www.goatcounter.com
2// This file (and *only* this file) is released under the ISC license:
3// https://opensource.org/licenses/ISC
4;(function() {
5	'use strict';
6
7	if (window.goatcounter && window.goatcounter.vars)  // Compatibility with very old version; do not use.
8		window.goatcounter = window.goatcounter.vars
9	else
10		window.goatcounter = window.goatcounter || {}
11
12	// Load settings from data-goatcounter-settings.
13	var s = document.querySelector('script[data-goatcounter]')
14	if (s && s.dataset.goatcounterSettings) {
15		try         { var set = JSON.parse(s.dataset.goatcounterSettings) }
16		catch (err) { console.error('invalid JSON in data-goatcounter-settings: ' + err) }
17		for (var k in set)
18			if (['no_onload', 'no_events', 'allow_local', 'allow_frame', 'path', 'title', 'referrer', 'event'].indexOf(k) > -1)
19				window.goatcounter[k] = set[k]
20	}
21
22	var enc = encodeURIComponent
23
24	// Get all data we're going to send off to the counter endpoint.
25	var get_data = function(vars) {
26		var data = {
27			p: (vars.path     === undefined ? goatcounter.path     : vars.path),
28			r: (vars.referrer === undefined ? goatcounter.referrer : vars.referrer),
29			t: (vars.title    === undefined ? goatcounter.title    : vars.title),
30			e: !!(vars.event || goatcounter.event),
31			s: [window.screen.width, window.screen.height, (window.devicePixelRatio || 1)],
32			b: is_bot(),
33			q: location.search,
34		}
35
36		var rcb, pcb, tcb  // Save callbacks to apply later.
37		if (typeof(data.r) === 'function') rcb = data.r
38		if (typeof(data.t) === 'function') tcb = data.t
39		if (typeof(data.p) === 'function') pcb = data.p
40
41		if (is_empty(data.r)) data.r = document.referrer
42		if (is_empty(data.t)) data.t = document.title
43		if (is_empty(data.p)) data.p = get_path()
44

45		if (rcb) data.r = rcb(data.r)
46		if (tcb) data.t = tcb(data.t)
47		if (pcb) data.p = pcb(data.p)
48		return data
49	}
50
51	// Check if a value is "empty" for the purpose of get_data().
52	var is_empty = function(v) { return v === null || v === undefined || typeof(v) === 'function' }
53
54	// See if this looks like a bot; there is some additional filtering on the
55	// backend, but these properties can't be fetched from there.
56	var is_bot = function() {
57		// Headless browsers are probably a bot.
58		var w = window, d = document
59		if (w.callPhantom || w._phantom || w.phantom)
60			return 150
61		if (w.__nightmare)
62			return 151
63		if (d.__selenium_unwrapped || d.__webdriver_evaluate || d.__driver_evaluate)
64			return 152
65		if (navigator.webdriver)
66			return 153
67		return 0
68	}
69
70	// Object to urlencoded string, starting with a ?.
71	var urlencode = function(obj) {
72		var p = []
73		for (var k in obj)
74			if (obj[k] !== '' && obj[k] !== null && obj[k] !== undefined && obj[k] !== false)
75				p.push(enc(k) + '=' + enc(obj[k]))
76		return '?' + p.join('&')
77	}
78
79	// Show a warning in the console.
80	var warn = function(msg) {
81		if (console && 'warn' in console)
82			console.warn('goatcounter: ' + msg)
83	}
84
85	// Get the endpoint to send requests to.
86	var get_endpoint = function() {
87		var s = document.querySelector('script[data-goatcounter]')
88		if (s && s.dataset.goatcounter)
89			return s.dataset.goatcounter
90		return (goatcounter.endpoint || window.counter)  // counter is for compat; don't use.
91	}
92
93	// Get current path.
94	var get_path = function() {
95		var loc = location,
96			c = document.querySelector('link[rel="canonical"][href]')
97		if (c) {  // May be relative or point to different domain.
98			var a = document.createElement('a')
99			a.href = c.href
100			if (a.hostname.replace(/^www\./, '') === location.hostname.replace(/^www\./, ''))
101				loc = a
102		}
103		return (loc.pathname + loc.search) || '/'
104	}
105
106	// Run function after DOM is loaded.
107	var on_load = function(f) {
108		if (document.body === null)
109			document.addEventListener('DOMContentLoaded', function() { f() }, false)
110		else
111			f()
112	}
113
114	// Filter some requests that we (probably) don't want to count.
115	goatcounter.filter = function() {
116		if ('visibilityState' in document && document.visibilityState === 'prerender')
117			return 'visibilityState'
118		if (!goatcounter.allow_frame && location !== parent.location)
119			return 'frame'
120		if (!goatcounter.allow_local && location.hostname.match(/(localhost$|^127\.|^10\.|^172\.(1[6-9]|2[0-9]|3[0-1])\.|^192\.168\.|^0\.0\.0\.0$)/))
121			return 'localhost'
122		if (!goatcounter.allow_local && location.protocol === 'file:')
123			return 'localfile'
124		if (localStorage && localStorage.getItem('skipgc') === 't')
125			return 'disabled with #toggle-goatcounter'
126		return false
127	}
128
129	// Get URL to send to GoatCounter.
130	window.goatcounter.url = function(vars) {
131		var data = get_data(vars || {})
132		if (data.p === null)  // null from user callback.
133			return
134		data.rnd = Math.random().toString(36).substr(2, 5)  // Browsers don't always listen to Cache-Control.
135
136		var endpoint = get_endpoint()
137		if (!endpoint)
138			return warn('no endpoint found')
139
140		return endpoint + urlencode(data)
141	}
142
143	// Count a hit.
144	window.goatcounter.count = function(vars) {
145		var f = goatcounter.filter()
146		if (f)
147			return warn('not counting because of: ' + f)
148
149		var url = goatcounter.url(vars)
150		if (!url)
151			return warn('not counting because path callback returned null')
152
153		var img = document.createElement('img')
154		img.src = url
155		img.style.position = 'absolute'  // Affect layout less.
156		img.style.bottom = '0px'
157		img.style.width = '1px'
158		img.style.height = '1px'
159		img.loading = 'eager'
160		img.setAttribute('alt', '')
161		img.setAttribute('aria-hidden', 'true')
162
163		var rm = function() { if (img && img.parentNode) img.parentNode.removeChild(img) }
164		img.addEventListener('load', rm, false)
165		document.body.appendChild(img)
166	}
167
168	// Get a query parameter.
169	window.goatcounter.get_query = function(name) {
170		var s = location.search.substr(1).split('&')
171		for (var i = 0; i < s.length; i++)
172			if (s[i].toLowerCase().indexOf(name.toLowerCase() + '=') === 0)
173				return s[i].substr(name.length + 1)
174	}
175
176	// Track click events.
177	window.goatcounter.bind_events = function() {
178		if (!document.querySelectorAll)  // Just in case someone uses an ancient browser.
179			return
180
181		var send = function(elem) {
182			return function() {
183				goatcounter.count({
184					event:    true,
185					path:     (elem.dataset.goatcounterClick || elem.name || elem.id || ''),
186					title:    (elem.dataset.goatcounterTitle || elem.title || (elem.innerHTML || '').substr(0, 200) || ''),
187					referrer: (elem.dataset.goatcounterReferrer || elem.dataset.goatcounterReferral || ''),
188				})
189			}
190		}
191
192		Array.prototype.slice.call(document.querySelectorAll("*[data-goatcounter-click]")).forEac

192h(function(elem) {
193			if (elem.dataset.goatcounterBound)
194				return
195			var f = send(elem)
196			elem.addEventListener('click', f, false)
197			elem.addEventListener('auxclick', f, false)  // Middle click.
198			elem.dataset.goatcounterBound = 'true'
199		})
200	}
201
202	// Add a "visitor counter" frame or image.
203	window.goatcounter.visit_count = function(opt) {
204		on_load(function() {
205			opt        = opt        || {}
206			opt.type   = opt.type   || 'html'
207			opt.append = opt.append || 'body'
208			opt.path   = opt.path   || get_path()
209			opt.attr   = opt.attr   || {width: '200', height: (opt.no_branding ? '60' : '80')}
210
211			opt.attr['src'] = get_endpoint() + 'er/' + enc(opt.path) + '.' + enc(opt.type) + '?'
212			if (opt.no_branding) opt.attr['src'] += '&no_branding=1'
213			if (opt.style)       opt.attr['src'] += '&style=' + enc(opt.style)
214			if (opt.start)       opt.attr['src'] += '&start=' + enc(opt.start)
215			if (opt.end)         opt.attr['src'] += '&end='   + enc(opt.end)
216
217			var tag = {png: 'img', svg: 'img', html: 'iframe'}[opt.type]
218			if (!tag)
219				return warn('visit_count: unknown type: ' + opt.type)
220
221			if (opt.type === 'html') {
222				opt.attr['frameborder'] = '0'
223				opt.attr['scrolling']   = 'no'
224			}
225
226			var d = document.createElement(tag)
227			for (var k in opt.attr)
228				d.setAttribute(k, opt.attr[k])
229
230			var p = document.querySelector(opt.append)
231			if (!p)
232				return warn('visit_count: append not found: ' + opt.append)
233			p.appendChild(d)
234		})
235	}
236
237	// Make it easy to skip your own views.
238	if (location.hash === '#toggle-goatcounter') {
239		if (localStorage.getItem('skipgc') === 't') {
240			localStorage.removeItem('skipgc', 't')
241			alert('GoatCounter tracking is now ENABLED in this browser.')
242		}
243		else {
244			localStorage.setItem('skipgc', 't')
245			alert('GoatCounter tracking is now DISABLED in this browser until ' + location + ' is loaded again.')
246		}
247	}
248
249	if (!goatcounter.no_onload)
250		on_load(function() {
251			// 1. Page is visible, count request.
252			// 2. Page is not yet visible; wait until it switches to 'visible' and count.
253			// See #487
254			if (!('visibilityState' in document) || document.visibilityState === 'visible')
255				goatcounter.count()
256			else {
257				var f = function(e) {
258					if (document.visibilityState !== 'visible')
259						return
260					document.removeEventListener('visibilitychange', f)
261					goatcounter.count()
262				}
263				document.addEventListener('visibilitychange', f)
264			}
265
266			if (!goatcounter.no_events)
267				goatcounter.bind_events()
268		})
269})();