https://languagemagazine.com/wp-content/plugins/adrotate-pro/library/jquery.groups.js

1/*
2Dynamic advert rotation for AdRotate
3Version: 1.0.2
4Original code: Arnan de Gans
5With help from: Mathias Joergensen, Fraser Munro
6Copyright: See notice in adrotate-pro.php
7
8== Settings ==
9groupid : PHP Group ID [integer, defaults to 0]
10speed : Time each slide is shown [integer: milliseconds, defaults to 3000]
11repeat_impressions : Stop counting impressions? [switch, defaults to Y]
12*/
13
14(function($) {
15	$.fn.gslider = function(settings) {
16		var config = {groupid:0,speed:3000,repeat_impressions:'Y'};
17		if(settings) $.extend(true, config, settings)
18
19		this.each(function(i) {
20			var $cont = $(this);
21			var gallery = $(this).children();
22			var length = gallery.length;
23			var timer = 0;
24			var counter = 1;
25			var repeat = 1;
26
27			if(length == 1) {
28				// Impression tracker (Single ad)
29	            var tracker = $cont.find(".c-1 a").attr("data-track");
30				if(typeof tracker !== 'undefined') {
31					impressiontracker(tracker);
32				}
33			}
34			
35			if(length > 1) {
36				$cont.find(".c-1").show();
37				for(n = 2; n <= length; n++) {
38					$cont.find(".c-" + n).hide();
39				}
40				
41				timer = setInterval(function(){ play(); }, config.speed);
42			}
43
44			function transitionTo(gallery, index) {
45				if((counter >= length) || (index >= length)) { 
46					counter = 1;
47					repeat = 2;
48				} else { 
49					counter++;
50				}
51				$cont.find(".c-" + counter).show();
52
53				// Impression tracker (Multiple ads)
54	            var tracker = $cont.find(".c-" + counter + ' a').attr("data-track");
55				if(typeof tracker !== 'undefined') {
56					if((repeat == 1 && config.repeat_impressions == 'N') || config.repeat_impressions == 'Y') {
57						impressiontracker(tracker);
58					}
59				}
60				$cont.find(".c-" + index).hide();
61			}
62			
63			function play() {
64				transitionTo(gallery, counter);
65			}
66
67			function impressiontracker(tracker) {
68	            admeta = atob(tracker).split(',');
69				var name = escape('adrotate-'+admeta[0]);
70				var now = Math.round(Date.now()/1000);
71				var expired = now - admeta[2];
72				var session = sessionStorage.getItem(name); // Get session data
73
74				if(session == null) { // New session, no previous data
75					session = 0;
76				}
77
78				if(session <= expired) { // Count new impression?
79					$.post(impression_object.ajax_url, {'action': 'adrotate_impression','track': tracker});
80				    sessionStorage.setItem(name, now);
81					delete tracker;
82				}
83			}
84		});
85		return this;
86	};
87}(jQuery));