/* http://whytheluckystiff.net/ruby/strftime.js */
/* other support functions -- thanks, ecmanaut! */
var strftime_funks = {
  zeropad: function( n ){ return n>9 ? n : '0'+n; },
  a: function(t) { return ['Sun','Mon','Tue','Wed','Thu','Fri','Sat'][t.getDay()] },
  A: function(t) { return ['Sunday','Monday','Tuedsay','Wednesday','Thursday','Friday','Saturday'][t.getDay()] },
  b: function(t) { return ['Jan','Feb','Mar','Apr','May','Jun', 'Jul','Aug','Sep','Oct','Nov','Dec'][t.getMonth()] },
  B: function(t) { return ['January','February','March','April','May','June', 'July','August',
      'September','October','November','December'][t.getMonth()] },
  c: function(t) { return t.toString() },
  d: function(t) { return this.zeropad(t.getDate()) },
  H: function(t) { return this.zeropad(t.getHours()) },
  I: function(t) { return this.zeropad((t.getHours() + 12) % 12) },
  m: function(t) { return this.zeropad(t.getMonth()+1) }, // month-1
  M: function(t) { return this.zeropad(t.getMinutes()) },
  p: function(t) { return this.H(t) < 12 ? 'AM' : 'PM'; },
  S: function(t) { return this.zeropad(t.getSeconds()) },
  w: function(t) { return t.getDay() }, // 0..6 == sun..sat
  y: function(t) { return this.zeropad(this.Y(t) % 100); },
  Y: function(t) { return t.getFullYear() },
  '%': function(t) { return '%' }
};

Date.prototype.strftime = function (fmt) {
    var t = this;
    for (var s in strftime_funks) {
        if (s.length == 1 )
            fmt = fmt.replace('%' + s, strftime_funks[s](t));
    }
    return fmt;
};

/*
 * 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, format){
	var date = new Date((time || "").replace(/-/g,"/").replace(/[TZ]/g," ")),
		diff = (((new Date()).getTime() - date.getTime()) / 1000) + (date.getTimezoneOffset()*60),
		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" ||
		day_diff < 31 && Math.ceil( day_diff / 7 ) + " weeks ago" ||
                (new Date(date.getTime() - date.getTimezoneOffset()*60000)).strftime(format);
}

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