/**
*	@author Trey Shugart
*	@date 2007-03-06
*	@license GNU LGPL
*	jQuery plugin/utility function semi-equivalent to PHP's date() function.
*/
(function($) {
	$.phpDate = function(stringFormat, timestamp) {
		var date, dateString = '';
		
		// defaults
		if (typeof(stringFormat) === 'undefined')
			stringFormat = 'Y-m-d h:i:s';
		if (typeof(timestamp) === 'undefined' || isNaN(timestamp))
			timestamp = Math.round(new Date().getTime() / 1000.0);
		
		// date object, the timestamp should be in seconds not milliseconds
		date = new Date(timestamp * 1000);
		
		// store the different dates
		var dates = new Object;
		
		// day
		dates.d = _zeroPad(date.getDate()); // day number, with leading zeros, 01-31
		dates.D = _abbr(_dayName(date)); // day abbreviated, Sun to Sat
		dates.j = date.getDate(); // day number, no leading zeros, 1-31
		dates.l = _dayName(date); // day name, Sunday to Saturday
		dates.N = date.getDay() + 1 // day number, 1-7
		dates.S = _suffix(date); // day number suffix, st, nd, rd, th
		dates.w = date.getDay(); // day number as index, 0-6
		dates.z = (date.getMonth() + 1) * date.getDate(); // day number of the year, 0 - 365
		// week
			// to add later
		// month
		dates.F = _monthName(date); // month full textual representation, January to February
		dates.m = _zeroPad(date.getMonth() + 1); // month number, with leading zeroes, 01-12
		dates.M = _abbr(_monthName(date)); // month abbreviated, Jan to Feb
		dates.n = date.getMonth() + 1; // month number, no leading zeros,  1-12
		dates.t = _daysPerMonth(date); // days per month, 28 to 31
		// year
		dates.Y = date.getFullYear(); // full year representation, i.e. 2008
		// time
		dates.h = (date.getHours() > 12) ? (date.getHours() - 12) : date.getHours();
		dates.H = date.getHours();
		dates.i = _zeroPad(date.getMinutes());
		dates.s = _zeroPad(date.getSeconds());
		dates.a = (date.getHours () < 12) ? 'am' : 'pm';
		dates.A = (date.getHours () < 12) ? 'AM' : 'PM';
		// timezone
			// to add later
		// full date/time
			// to add later
		
		// format the date time string
		for (var i = 0; i < stringFormat.length; i++) {
			var curChar = stringFormat.charAt(i);
			if (dates[curChar] !== undefined)
				dateString += dates[curChar];
			else
				dateString += curChar;
		};
		
		// return it
		return dateString;
		
		
		
		
		/* ---- UTILITY FUNCTIONS ---- */
		
		
		function _zeroPad(str, len) {
			var pad;
			var s = str.toString();
			if (len === undefined)
				len = 2;
			for (var i = s.length; i < len; i++)
				s = '0'+s;
			return s;
		};
		
		function _dayName(date) {
			var d = date.getDay();
			var days = new Array(
				'Sunday',
				'Monday',
				'Tuesday',
				'Wednesday',
				'Thursday',
				'Friday',
				'Saturday',
				'Sunday'
			);
			return days[d];
		};
		
		function _monthName(date) {
			var m = date.getMonth();
			var months = new Array(
				'January',
				'February',
				'March',
				'April',
				'May',
				'June',
				'July',
				'August',
				'September',
				'October',
				'November',
				'December'
			);
			return months[m];
		};
		
		function _abbr(str) {
			if (typeof(str) === 'undefined')
				return false;
			var s = str.toString();
			return s.substring(0, 2);
		};
		
		function _suffix(date) {
			var d = date.getDate();
			var st = new Array(1, 21, 31);
			var nd = new Array(2, 22);
			var rd = new Array(3, 23);
			if ($.inArray(d, st))
				return 'st';
			if ($.inArray(d, nd))
				return 'nd';
			if ($.inArray(d, rd))
				return 'rd';
			return 'th';
		};
		
		function _daysPerMonth(date) {
			var d = date.getMonth();
			var dpm = new Array(
				31, // jan
				((_isLeapYear(date)) ? 29 : 28), // feb
				31, // mar
				30, // apr
				31, // may
				30, // jun
				31, // jul
				31, // aug
				30, // sep
				31, // oct
				30, // nov
				31 // dec
			);
			return dpm[d];
		};
		
		function _isLeapYear(date) {
			var y = date.getYear();
			if (y % 100 === 0) {
				if (y % 400 === 0)
					return true;
				return false;
			}
			if (y % 4 === 0)
				return true;
			return false;
		};
	};
})(jQuery);