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  1. /**
  2.  * Timeago is a jQuery plugin that makes it easy to support automatically
  3.  * updating fuzzy timestamps (e.g. "4 minutes ago" or "about 1 day ago").
  4.  *
  5.  * @name timeago
  6.  * @version 0.11.4
  7.  * @requires jQuery v1.2.3+
  8.  * @author Ryan McGeary
  9.  * @license MIT License - http://www.opensource.org/licenses/mit-license.php
  10.  *
  11.  * For usage and examples, visit:
  12.  * http://timeago.yarp.com/
  13.  *
  14.  * Copyright (c) 2008-2012, Ryan McGeary (ryan -[at]- mcgeary [*dot*] org)
  15.  */
  16. (function($) {
  17.   $.timeago = function(timestamp) {
  18.     if (timestamp instanceof Date) {
  19.       return inWords(timestamp);
  20.     } else if (typeof timestamp === "string") {
  21.       return inWords($.timeago.parse(timestamp));
  22.     } else if (typeof timestamp === "number") {
  23.       return inWords(new Date(timestamp));
  24.     } else {
  25.       return inWords($.timeago.datetime(timestamp));
  26.     }
  27.   };
  28.   var $t = $.timeago;
  29.  
  30.   $.extend($.timeago, {
  31.     settings: {
  32.       refreshMillis: 60000,
  33.       allowFuture: false,
  34.       strings: {
  35.         prefixAgo: null,
  36.         prefixFromNow: null,
  37.         suffixAgo: "ago",
  38.         suffixFromNow: "from now",
  39.         seconds: "less than a minute",
  40.         minute: "about a minute",
  41.         minutes: "%d minutes",
  42.         hour: "about an hour",
  43.         hours: "about %d hours",
  44.         day: "a day",
  45.         days: "%d days",
  46.         month: "about a month",
  47.         months: "%d months",
  48.         year: "about a year",
  49.         years: "%d years",
  50.         wordSeparator: " ",
  51.         numbers: []
  52.       }
  53.     },
  54.     inWords: function(distanceMillis) {
  55.       var $l = this.settings.strings;
  56.       var prefix = $l.prefixAgo;
  57.       var suffix = $l.suffixAgo;
  58.       if (this.settings.allowFuture) {
  59.         if (distanceMillis < 0) {
  60.           prefix = $l.prefixFromNow;
  61.           suffix = $l.suffixFromNow;
  62.         }
  63.       }
  64.  
  65.       var seconds = Math.abs(distanceMillis) / 1000;
  66.       var minutes = seconds / 60;
  67.       var hours = minutes / 60;
  68.       var days = hours / 24;
  69.       var years = days / 365;
  70.  
  71.       function substitute(stringOrFunction, number) {
  72.         var string = $.isFunction(stringOrFunction) ? stringOrFunction(number, distanceMillis) : stringOrFunction;
  73.         var value = ($l.numbers && $l.numbers[number]) || number;
  74.         return string.replace(/%d/i, value);
  75.       }
  76.  
  77.       var words = seconds < 45 && substitute($l.seconds, Math.round(seconds)) ||
  78.         seconds < 90 && substitute($l.minute, 1) ||
  79.         minutes < 45 && substitute($l.minutes, Math.round(minutes)) ||
  80.         minutes < 90 && substitute($l.hour, 1) ||
  81.         hours < 24 && substitute($l.hours, Math.round(hours)) ||
  82.         hours < 42 && substitute($l.day, 1) ||
  83.         days < 30 && substitute($l.days, Math.round(days)) ||
  84.         days < 45 && substitute($l.month, 1) ||
  85.         days < 365 && substitute($l.months, Math.round(days / 30)) ||
  86.         years < 1.5 && substitute($l.year, 1) ||
  87.         substitute($l.years, Math.round(years));
  88.  
  89.       var separator = $l.wordSeparator === undefined ?  " " : $l.wordSeparator;
  90.       return $.trim([prefix, words, suffix].join(separator));
  91.     },
  92.     parse: function(iso8601) {
  93.       var s = $.trim(iso8601);
  94.       s = s.replace(/\.\d+/,""); // remove milliseconds
  95.       s = s.replace(/-/,"/").replace(/-/,"/");
  96.       s = s.replace(/T/," ").replace(/Z/," UTC");
  97.       s = s.replace(/([\+\-]\d\d)\:?(\d\d)/," $1$2"); // -04:00 -> -0400
  98.       return new Date(s);
  99.     },
  100.     datetime: function(elem) {
  101.       var iso8601 = $t.isTime(elem) ? $(elem).attr("datetime") : $(elem).attr("title");
  102.       return $t.parse(iso8601);
  103.     },
  104.     isTime: function(elem) {
  105.       // jQuery's `is()` doesn't play well with HTML5 in IE
  106.       return $(elem).get(0).tagName.toLowerCase() === "time"; // $(elem).is("time");
  107.     }
  108.   });
  109.  
  110.   $.fn.timeago = function() {
  111.     var self = this;
  112.     self.each(refresh);
  113.  
  114.     var $s = $t.settings;
  115.     if ($s.refreshMillis > 0) {
  116.       setInterval(function() { self.each(refresh); }, $s.refreshMillis);
  117.     }
  118.     return self;
  119.   };
  120.  
  121.   function refresh() {
  122.     var data = prepareData(this);
  123.     if (!isNaN(data.datetime)) {
  124.       $(this).text(inWords(data.datetime));
  125.     }
  126.     return this;
  127.   }
  128.  
  129.   function prepareData(element) {
  130.     element = $(element);
  131.     if (!element.data("timeago")) {
  132.       element.data("timeago", { datetime: $t.datetime(element) });
  133.       var text = $.trim(element.text());
  134.       if (text.length > 0 && !($t.isTime(element) && element.attr("title"))) {
  135.         element.attr("title", text);
  136.       }
  137.     }
  138.     return element.data("timeago");
  139.   }
  140.  
  141.   function inWords(date) {
  142.     return $t.inWords(distance(date));
  143.   }
  144.  
  145.   function distance(date) {
  146.     return (new Date().getTime() - date.getTime());
  147.   }
  148.  
  149.   // fix for IE6 suckage
  150.   document.createElement("abbr");
  151.   document.createElement("time");
  152. }(jQuery));
  153.