/* timeago version: 0.5.1
http://www.opensource.org/licenses/mit-license.php
Copyright (c) 2008, Ryan McGeary */
(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: {
                ago: "ago",
                fromNow: "from now",
                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 suffix = $l.ago;
            if (this.settings.allowFuture) {
                if (distanceMillis < 0) suffix = $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 && sprintf($l.seconds, Math.round(seconds)) ||
        seconds < 90 && $l.minute ||
        minutes < 45 && sprintf($l.minutes, Math.round(minutes)) ||
        minutes < 90 && $l.hour ||
        hours < 24 && sprintf($l.hours, Math.round(hours)) ||
        hours < 48 && $l.day ||
        days < 30 && sprintf($l.days, Math.floor(days)) ||
        days < 60 && $l.month ||
        days < 365 && sprintf($l.months, Math.floor(days / 30)) ||
        years < 2 && $l.year ||
        sprintf($l.years, Math.floor(years));

            return words + " " + suffix;
        },
        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(new Date(s).toLocaleString());
        }
    });

    $.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());
    }

    // lame sprintf implementation
    function sprintf(string, value) {
        return string.replace(/%d/i, value);
    }

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