/*
* timeago: a jQuery plugin, version: 0.7.1 (2009-02-18)
* @requires jQuery v1.2 or later
*
* Timeago is a jQuery plugin that makes it easy to support automatically
* updating fuzzy timestamps (e.g. "4 minutes ago" or "about 1 day ago").
*
* For usage and examples, visit:
* http://timeago.yarp.com/
*
* Licensed under the MIT:
* http://www.opensource.org/licenses/mit-license.php
*
* Copyright (c) 2008-2009, Ryan McGeary (ryanonjavascript -[at]- mcgeary [*dot*] org)
*/
(function($) {
	$.timeago = function(timestamp) {
		if (timestamp instanceof Date) return inWords(timestamp);
		else if (typeof timestamp == "string") return inWords($.timeago.parse(timestamp));
		else return inWords($.timeago.parse($(timestamp).attr("title")));
	};
	var $t = $.timeago;

	$.extend($.timeago, {
		settings: {
			refreshMillis: 60000,
			allowFuture: false,
			strings: {
				prefixAgo: null,
				prefixFromNow: null,
				suffixAgo: "ago",
				suffixFromNow: "from now",
				ago: null, // DEPRECATED, use suffixAgo
				fromNow: null, // DEPRECATED, use suffixFromNow
				seconds: "less than a minute",
				minute: "about a minute",
				minutes: "%d minutes",
				hour: "about an hour",
				hours: "about %d hours",
				day: "a day",
				days: "%d days",
				month: "about a month",
				months: "%d months",
				year: "about a year",
				years: "%d years"
			}
		},
		inWords: function(distanceMillis) {
			var $l = this.settings.strings;
			var prefix = $l.prefixAgo;
			var suffix = $l.suffixAgo || $l.ago;
			if (this.settings.allowFuture) {
				if (distanceMillis < 0) {
					prefix = $l.prefixFromNow;
					suffix = $l.suffixFromNow || $l.fromNow;
				}
				distanceMillis = Math.abs(distanceMillis);
			}

			var seconds = distanceMillis / 1000;
			var minutes = seconds / 60;
			var hours = minutes / 60;
			var days = hours / 24;
			var years = days / 365;

			var words = seconds < 45 && substitute($l.seconds, Math.round(seconds)) ||
        seconds < 90 && substitute($l.minute, 1) ||
        minutes < 45 && substitute($l.minutes, Math.round(minutes)) ||
        minutes < 90 && substitute($l.hour, 1) ||
        hours < 24 && substitute($l.hours, Math.round(hours)) ||
        hours < 48 && substitute($l.day, 1) ||
        days < 30 && substitute($l.days, Math.floor(days)) ||
        days < 60 && substitute($l.month, 1) ||
        days < 365 && substitute($l.months, Math.floor(days / 30)) ||
        years < 2 && substitute($l.year, 1) ||
        substitute($l.years, Math.floor(years));

			return $.trim([prefix, words, suffix].join(" "));
		},
		parse: function(iso8601) {
			var s = $.trim(iso8601);
			s = s.replace(/-/, "/").replace(/-/, "/");
			s = s.replace(/T/, " ").replace(/Z/, " UTC");
			s = s.replace(/([\+-]\d\d)\:?(\d\d)/, " $1$2"); // -04:00 -> -0400
			return new Date(s);
		}
	});

	$.fn.timeago = function() {
		var self = this;
		self.each(refresh);

		var $s = $t.settings;
		if ($s.refreshMillis > 0) {
			setInterval(function() { self.each(refresh); }, $s.refreshMillis);
		}
		return self;
	};

	function refresh() {
		var date = $t.parse(this.title);
		if (!isNaN(date)) {
			$(this).text(inWords(date));
		}
		return this;
	}

	function inWords(date) {
		return $t.inWords(distance(date));
	}

	function distance(date) {
		return (new Date().getTime() - date.getTime());
	}

	function substitute(stringOrFunction, value) {
		var string = $.isFunction(stringOrFunction) ? stringOrFunction(value) : stringOrFunction;
		return string.replace(/%d/i, value);
	}

	// fix for IE6 suckage
	if ($.browser.msie && $.browser.version < 7.0) {
		document.createElement('abbr');
	}
})(jQuery);