/*
 * $.date(): jQuery Date Format Object
 *
 * Based off the code from the php2JS project (Additional Comments Below)
 *
 * Version 1.0.0
 * -------------
 * - Accepts Strings For Format in style of PHP
 * - Accepts Numeric or String Timestamp
 *
 *
 */
(function(){
    var dateFormat = function(element, format, timestamp){
        // http://kevin.vanzonneveld.net
        // +   original by: Carlos R. L. Rodrigues (http://www.jsfromhell.com)
        // +      parts by: Peter-Paul Koch (http://www.quirksmode.org/js/beat.html)
        // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // +   improved by: MeEtc (http://yass.meetcweb.com)
        // +   improved by: Brad Touesnard
        // +   improved by: Tim Wiel
        // +   improved by: Bryan Elliott
        // +   improved by: Brett Zamir (http://brett-zamir.me)
        // +   improved by: David Randall
        // +      input by: Brett Zamir (http://brett-zamir.me)
        // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // +   improved by: Brett Zamir (http://brett-zamir.me)
        // +   improved by: Brett Zamir (http://brett-zamir.me)
        // +   improved by: Theriault
        // +  derived from: gettimeofday
        // +      input by: majak
        // +   bugfixed by: majak
        // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
        // +      input by: Alex
        // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
        // +   improved by: Theriault
        // +   improved by: Brett Zamir (http://brett-zamir.me)
        // +   improved by: Theriault
        // +   improved by: Thomas Beaucourt (http://www.webapp.fr)
        // +   improved by: JT
        // +   improved by: Theriault
        // +   improved by: Rafał Kukawski (http://blog.kukawski.pl)
        // %        note 1: Uses global: php_js to store the default timezone
        // *     example 1: date('H:m:s \\m \\i\\s \\m\\o\\n\\t\\h', 1062402400);
        // *     returns 1: '09:09:40 m is month'
        // *     example 2: date('F j, Y, g:i a', 1062462400);
        // *     returns 2: 'September 2, 2003, 2:26 am'
        // *     example 3: date('Y W o', 1062462400);
        // *     returns 3: '2003 36 2003'
        // *     example 4: x = date('Y m d', (new Date()).getTime()/1000); 
        // *     example 4: (x+'').length == 10 // 2009 01 09
        // *     returns 4: true
        // *     example 5: date('W', 1104534000);
        // *     returns 5: '53'
        // *     example 6: date('B t', 1104534000);
        // *     returns 6: '999 31'
        // *     example 7: date('W U', 1293750000.82); // 2010-12-31
        // *     returns 7: '52 1293750000'
        // *     example 8: date('W', 1293836400); // 2011-01-01
        // *     returns 8: '52'
        // *     example 9: date('W Y-m-d', 1293974054); // 2011-01-02
        // *     returns 9: '52 2011-01-02'
        var that = this, jsdate, f, formatChr = /\\?([a-z])/gi, formatChrCb,        // Keep this here (works, but for code commented-out
        // below for file size reasons)
        //, tal= [],
        _pad = function(n, c){
            if ((n = n + "").length < c) {
                return new Array((++c) - n.length).join("0") + n;
            }
            else {
                return n;
            }
        }, txt_words = ["Sun", "Mon", "Tues", "Wednes", "Thurs", "Fri", "Satur", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"], txt_ordin = {
            1: "st",
            2: "nd",
            3: "rd",
            21: "st",
            22: "nd",
            23: "rd",
            31: "st"
        };
        formatChrCb = function(t, s){
            return f[t] ? f[t]() : s;
        };
        f = {
            // Day
            d: function(){ // Day of month w/leading 0; 01..31
                return _pad(f.j(), 2);
            },
            D: function(){ // Shorthand day name; Mon...Sun
                return f.l().slice(0, 3);
            },
            j: function(){ // Day of month; 1..31
                return jsdate.getDate();
            },
            l: function(){ // Full day name; Monday...Sunday
                return txt_words[f.w()] + 'day';
            },
            N: function(){ // ISO-8601 day of week; 1[Mon]..7[Sun]
                return f.w() || 7;
            },
            S: function(){ // Ordinal suffix for day of month; st, nd, rd, th
                return txt_ordin[f.j()] || 'th';
            },
            w: function(){ // Day of week; 0[Sun]..6[Sat]
                return jsdate.getDay();
            },
            z: function(){ // Day of year; 0..365
                var a = new Date(f.Y(), f.n() - 1, f.j()), b = new Date(f.Y(), 0, 1);
                return Math.round((a - b) / 864e5) + 1;
            },
            
            // Week
            W: function(){ // ISO-8601 week number
                var a = new Date(f.Y(), f.n() - 1, f.j() - f.N() + 3), b = new Date(a.getFullYear(), 0, 4);
                return 1 + Math.round((a - b) / 864e5 / 7);
            },
            
            // Month
            F: function(){ // Full month name; January...December
                return txt_words[6 + f.n()];
            },
            m: function(){ // Month w/leading 0; 01...12
                return _pad(f.n(), 2);
            },
            M: function(){ // Shorthand month name; Jan...Dec
                return f.F().slice(0, 3);
            },
            n: function(){ // Month; 1...12
                return jsdate.getMonth() + 1;
            },
            t: function(){ // Days in month; 28...31
                return (new Date(f.Y(), f.n(), 0)).getDate();
            },
            
            // Year
            L: function(){ // Is leap year?; 0 or 1
                var y = f.Y(), a = y & 3, b = y % 4e2, c = y % 1e2;
                return 0 + (!a && (c || !b));
            },
            o: function(){ // ISO-8601 year
                var n = f.n(), W = f.W(), Y = f.Y();
                return Y + (n === 12 && W < 9 ? -1 : n === 1 && W > 9);
            },
            Y: function(){ // Full year; e.g. 1980...2010
                return jsdate.getFullYear();
            },
            y: function(){ // Last two digits of year; 00...99
                return (f.Y() + "").slice(-2);
            },
            
            // Time
            a: function(){ // am or pm
                return jsdate.getHours() > 11 ? "pm" : "am";
            },
            A: function(){ // AM or PM
                return f.a().toUpperCase();
            },
            B: function(){ // Swatch Internet time; 000..999
                var H = jsdate.getUTCHours() * 36e2, // Hours
					i = jsdate.getUTCMinutes() * 60, // Minutes
					s = jsdate.getUTCSeconds(); // Seconds
                return _pad(Math.floor((H + i + s + 36e2) / 86.4) % 1e3, 3);
            },
            g: function(){ // 12-Hours; 1..12
                return f.G() % 12 || 12;
            },
            G: function(){ // 24-Hours; 0..23
                return jsdate.getHours();
            },
            h: function(){ // 12-Hours w/leading 0; 01..12
                return _pad(f.g(), 2);
            },
            H: function(){ // 24-Hours w/leading 0; 00..23
                return _pad(f.G(), 2);
            },
            i: function(){ // Minutes w/leading 0; 00..59
                return _pad(jsdate.getMinutes(), 2);
            },
            s: function(){ // Seconds w/leading 0; 00..59
                return _pad(jsdate.getSeconds(), 2);
            },
            u: function(){ // Microseconds; 000000-999000
                return _pad(jsdate.getMilliseconds() * 1000, 6);
            },
            
            // Timezone
            e: function(){ // Timezone identifier; e.g. Atlantic/Azores, ...
                // The following works, but requires inclusion of the very large
                // timezone_abbreviations_list() function.
                /*              var abbr = '', i = 0, os = 0;
                 if (that.php_js && that.php_js.default_timezone) {
                 return that.php_js.default_timezone;
                 }
                 if (!tal.length) {
                 tal = that.timezone_abbreviations_list();
                 }
                 for (abbr in tal) {
                 for (i = 0; i < tal[abbr].length; i++) {
                 os = -jsdate.getTimezoneOffset() * 60;
                 if (tal[abbr][i].offset === os) {
                 return tal[abbr][i].timezone_id;
                 }
                 }
                 }
                 */
                return 'UTC';
            },
            I: function(){ // DST observed?; 0 or 1
                // Compares Jan 1 minus Jan 1 UTC to Jul 1 minus Jul 1 UTC.
                // If they are not equal, then DST is observed.
                var a = new Date(f.Y(), 0), // Jan 1
					c = Date.UTC(f.Y(), 0), // Jan 1 UTC
					b = new Date(f.Y(), 6), // Jul 1
					d = Date.UTC(f.Y(), 6); // Jul 1 UTC
                return 0 + ((a - c) !== (b - d));
            },
            O: function(){ // Difference to GMT in hour format; e.g. +0200
                var a = jsdate.getTimezoneOffset();
                return (a > 0 ? "-" : "+") + _pad(Math.abs(a / 60 * 100), 4);
            },
            P: function(){ // Difference to GMT w/colon; e.g. +02:00
                var O = f.O();
                return (O.substr(0, 3) + ":" + O.substr(3, 2));
            },
            T: function(){ // Timezone abbreviation; e.g. EST, MDT, ...
                // The following works, but requires inclusion of the very
                // large timezone_abbreviations_list() function.
                /*              var abbr = '', i = 0, os = 0, default = 0;
                 if (!tal.length) {
                 tal = that.timezone_abbreviations_list();
                 }
                 if (that.php_js && that.php_js.default_timezone) {
                 default = that.php_js.default_timezone;
                 for (abbr in tal) {
                 for (i=0; i < tal[abbr].length; i++) {
                 if (tal[abbr][i].timezone_id === default) {
                 return abbr.toUpperCase();
                 }
                 }
                 }
                 }
                 for (abbr in tal) {
                 for (i = 0; i < tal[abbr].length; i++) {
                 os = -jsdate.getTimezoneOffset() * 60;
                 if (tal[abbr][i].offset === os) {
                 return abbr.toUpperCase();
                 }
                 }
                 }
                 */
                return 'UTC';
            },
            Z: function(){ // Timezone offset in seconds (-43200...50400)
                return -jsdate.getTimezoneOffset() * 60;
            },
            
            // Full Date/Time
            c: function(){ // ISO-8601 date.
                return 'Y-m-d\\Th:i:sP'.replace(formatChr, formatChrCb);
            },
            r: function(){ // RFC 2822
                return 'D, d M Y H:i:s O'.replace(formatChr, formatChrCb);
            },
            U: function(){ // Seconds since UNIX epoch
                return jsdate.getTime() / 1000 | 0;
            }
        };
        this.date = function(format, timestamp){
            that = this;
            jsdate = ((typeof timestamp === 'undefined') ? new Date() : // Not provided
				 (timestamp instanceof Date) ? new Date(timestamp) : // JS Date()
				 new Date(timestamp * 1000) // UNIX timestamp (auto-convert to int)
				);
            return format.replace(formatChr, formatChrCb);
        };
        return this.date(format, timestamp);
    };
    jQuery.extend({
        date: function(format,timestamp){
            var m = dateFormat(this, format, timestamp);
            return m || this;
        }
    });
})();