/*
 * 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.

var K = function () {
    var a = navigator.userAgent;
    return {
        ie: a.match(/MSIE\s([^;]*)/)
    }
}();

function prettyDate(time, lang){
	if (K.ie) {
    var user_date = new Date();
		system_date = Date.parse(time.replace(/( \+)/, ' UTC$1'));
    var diff = Math.floor((user_date - system_date) / 1000);
	}
	else {
		var date = new Date((time || "").replace(/-/g,"/").replace(/[TZ]/g," "));
		var	diff = (((new Date()).getTime() - date.getTime()) / 1000);
	}
	day_diff = Math.floor(diff / 86400);
			
	if ( isNaN(day_diff) || day_diff < 0 || day_diff >= 310 )
		return;
	
	if (lang=="de"){
		return day_diff == 0 && (
				diff < 60 && "Jetzt" ||
				diff < 120 && "Vor 1 Minute" ||
				diff < 3600 && "Vor " + Math.floor( diff / 60 ) + " Minuten" ||
				diff < 7200 && "Vor 1 Stunde" ||
				diff < 86400 && "Vor " + Math.floor( diff / 3600 ) + " Stunden") ||
			day_diff == 1 && "Gestern" ||
			day_diff < 7 && "Vor " + day_diff + " Tagen" ||
			day_diff == 7 && "Vor 1 Woche" ||
			day_diff < 310 && "Vor " + Math.ceil( day_diff / 7 ) + " Wochen";
	}
	else{
		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" ||
			day_diff < 310 && Math.ceil( day_diff / 7 ) + " weeks 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 );
		});
	};