/*
* JavaScript Pretty Date
* Copyright (c) 2008 John Resig (jquery.com)
* Licensed under the MIT license.
*/

// Takes an ISO time and returns a string representing how
// long ago the date represents.
function prettyDate(time) {
    var date = new Date((time || "").replace(/-/g, "/").replace(/[TZ]/g, " ")),
        diff = (((new Date()).getTime() - date.getTime()) / 1000) + (date.getTimezoneOffset() * 60),
		day_diff = Math.floor(Math.abs(diff) / 86400);

    return pd(diff, day_diff);
}

function prettyDateLocal(time) {
    var date = new Date(time),
        diff = (((new Date()).getTime() - date.getTime()) / 1000),
		day_diff = Math.floor(Math.abs(diff) / 86400);

    return pd(diff, day_diff);
}

function pd(diff, day_diff) {
    if (isNaN(day_diff) || day_diff < 0)
        return;

    return day_diff == 0 && (
            diff < 2 && "1 second ago" ||
			diff < 60 && Math.floor(diff) + " seconds ago" ||
			diff < 120 && "1 minute ago" ||
			diff < 3600 && Math.floor(diff / 60) + " minutes ago" ||
			diff < 7200 && "1 hour ago" ||
			diff < 86400 && Math.floor(diff / 3600) + " hours ago") ||
		day_diff == 1 && "Yesterday" ||
		day_diff < 7 && day_diff + " days ago" ||
        Math.ceil(day_diff / 7) == 1 && "1 week ago" ||
		day_diff < 31 && Math.ceil(day_diff / 7) + " weeks ago" ||
        "months ago";
}

// If jQuery is included in the page, adds a jQuery plugin to handle it as well
if (typeof jQuery != "undefined") {
    jQuery.fn.prettyDate = function () {
        return this.each(function () {
            var date = prettyDate(this.title);
            if (date)
                jQuery(this).text(date);
        });
    };

    jQuery.fn.prettyDateLocal = function () {
        return this.each(function () {
            var date = prettyDateLocal(this.title);
            if (date)
                jQuery(this).text(date);
        });
    };
}