/*
* 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),
		day_diff = Math.floor(diff / 86400);

	if (isNaN(day_diff) || day_diff < 0)
		return;

	return day_diff == 0 && (
			diff < 60 && "just now" ||
			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) + " week" + ((day_diff > 7) ? 's' : '') + " ago";
}