/*
* jQuery pretty date plug-in 1.0.0
* 
* http://bassistance.de/jquery-plugins/jquery-plugin-prettydate/
* 
* Based on John Resig's prettyDate http://ejohn.org/blog/javascript-pretty-date
*
* Copyright (c) 2009 Jörn Zaefferer
*
* $Id: jquery.validate.js 6096 2009-01-12 14:12:04Z joern.zaefferer $
*
* Dual licensed under the MIT and GPL licenses:
*   http://www.opensource.org/licenses/mit-license.php
*   http://www.gnu.org/licenses/gpl.html
*/

(function () {

    $.prettyDate = {

        template: function (source, params) {
            if (arguments.length == 1)
                return function () {
                    var args = $.makeArray(arguments);
                    args.unshift(source);
                    return $.prettyDate.template.apply(this, args);
                };
            if (arguments.length > 2 && params.constructor != Array) {
                params = $.makeArray(arguments).slice(1);
            }
            if (params.constructor != Array) {
                params = [params];
            }
            $.each(params, function (i, n) {
                source = source.replace(new RegExp("\\{" + i + "\\}", "g"), n);
            });
            return source;
        },

        now: function () {
            return new Date();
        },

        // Takes an ISO time and returns a string representing how
        // long ago the date represents.
        format: function (time) {

            var date = new Date((time || "").replace(/-/g, "/").replace(/[TZ]/g, " ")),
			diff = ($.prettyDate.now().getTime() - date.getTime()) / 1000,
			day_diff = Math.floor(diff / 86400);
            if (isNaN(day_diff) || day_diff < 0 || day_diff >= 31)
                return;

            var messages = $.prettyDate.messages;
            return day_diff == 0 && (
				diff < 60 && messages.now ||
				diff < 120 && messages.minute ||
				diff < 3600 && messages.minutes(Math.floor(diff / 60)) ||
				diff < 7200 && messages.hour ||
				diff < 86400 && messages.hours(Math.floor(diff / 3600))) ||
			day_diff == 1 && messages.yesterday ||
			day_diff < 7 && messages.days(day_diff) ||
			day_diff < 31 && messages.weeks(Math.ceil(day_diff / 7));
        }

    };

    $.prettyDate.messages = {
        now: "just now",
        minute: "1 minute ago",
        minutes: $.prettyDate.template("{0} minutes ago"),
        hour: "1 hour ago",
        hours: $.prettyDate.template("{0} hours ago"),
        yesterday: "Yesterday",
        days: $.prettyDate.template("{0} days ago"),
        weeks: $.prettyDate.template("{0} weeks ago")
    };

    $.fn.prettyDate = function (options) {
        options = $.extend({
            value: function () {
                return $(this).attr("title");
            },
            interval: 10000
        }, options);
        var elements = this;
        function format() {
            elements.each(function () {
                var date = $.prettyDate.format(options.value.apply(this));
                if (date && $(this).text() != date)
                    $(this).text(date);
            });
        }
        format();
        if (options.interval)
            setInterval(format, options.interval);

        return this;
    };

})();