https://www.bedfordgames.net/js/jquery.countdown.js

1/*
2 * jQuery The Final Countdown plugin v1.0.0 beta
3 * http://github.com/hilios/jquery.countdown
4 *
5 * Copyright (c) 2011 Edson Hilios
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sublicense, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be
16 * included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26(function($) {
27  
28  $.fn.countdown = function(toDate, callback) {
29    var handlers = ['seconds', 'minutes', 'hours', 'days', 'weeks', 'daysLeft'];
30    
31    function delegate(scope, method) {
32      return function() { return method.call(scope) }
33    }
34    
35    return this.each(function() {
36      // Convert
37      if(!(toDate instanceof Date)) {
38        if(String(toDate).match(/^[0-9]*$/)) {
39          toDate = new Date(toDate);
40        } else if( toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]{2})/) ||
41            toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]{2})/)
42            ) {
43          toDate = new Date(toDate);
44        } else if(toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})/) || 
45                  toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})/)
46                  ) {
47          toDate = new Date(toDate)
48        } else {
49          throw new Error("Doesn't seen to be a valid date object or string")
50        }
51      }
52      
53      var $this = $(this),
54          values = {},
55          lasting = {},
56          interval = $this.data('countdownInterval'),
57          currentDate = new Date(),
58          secondsLeft = Math.floor((toDate.valueOf() - currentDate.valueOf()) / 1000);
59      
60      function triggerEvents() {
61        // Evaluate if this node is included in the html
62        if($this.closest('html').length === 0) {
63          stop(); // Release the memory
64          dispatchEvent('removed');
65          return;
66        }
67        // Calculate the time offset
68        secondsLeft--;
69        if(secondsLeft < 0) {
70          secondsLeft = 0;
71        }
72        lasting = {
73          seconds : secondsLeft % 60,
74          minutes : Math.floor(secondsLeft / 60) % 60,
75          hours   : Math.floor(secondsLeft / 60 / 60) % 24,
76          days    : Math.floor(secondsLeft / 60 / 60 / 24),
77          weeks   : Math.floor(secondsLeft / 60 / 60 / 24 / 7),
78          daysLeft: Math.floor(secondsLeft / 60 / 60 / 24) % 7
79        }
80        for(var i=0; i<handlers.length; i++) {
81          var eventName = handlers[i];
82          if(values[eventName] != lasting[eventName]) {
83            values[eventName] = lasting[eventName];
84            dispatchEvent(eventName);
85          }
86        }
87        if(secondsLeft == 0) { 
88          stop();
89          dispatchEvent('finished');
90        }
91      }
92      triggerEvents();
93      
94      function dispatchEvent(eventName) {
95        var event     = $.Event(eventName);
96        event.date    = new Date(new Date().valueOf() + secondsLeft);
97        event.value   = values[eventName] || "0";
98        event.toDate  = toDate;
99        event.lasting = lasting;
100        switch(eventName) {
101          case "seconds":
102          case "minutes":
103          case "hours":
104            event.value = event.value < 10 ? '0'+event.value.toString() : event.value.toString();
105            break;
106          default:
107            if(event.value) {
108              event.value = event.value.toString();
109            }
110            break;
111        }
112        callback.call($this, event);
113      }
114      
115      function stop() {
116        clearInterval(interval);
117      }
118
119      function start() {
120        $this.data('countdownInterval', setInterval(delegate($this, triggerEvents), 1000));
121        interval = $this.data('countdownInterval');
122      }
123      
124      if(interval) stop();
125      start();
126    });
127  }
128})(jQuery);