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 /*

  * Copyright (C) 2004 Baron Schwartz <baron at sequent dot org>

  *

  * This program is free software; you can redistribute it and/or modify it

  * under the terms of the GNU Lesser General Public License as published by the

  * Free Software Foundation, version 2.1.

  *

  * This program is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more

  * details.

  */

 Date.parseFunctions = {count:0};

 Date.parseRegexes = [];

 Date.formatFunctions = {count:0};

 Date.prototype.dateFormat = function(format) {

     if (Date.formatFunctions[format] == null) {

         Date.createNewFormat(format);

     }

     var func = Date.formatFunctions[format];

     return this[func]();

 }

 Date.createNewFormat = function(format) {

     var funcName = "format" + Date.formatFunctions.count++;

     Date.formatFunctions[format] = funcName;

     var code = "Date.prototype." + funcName + " = function(){return ";

     var special = false;

     var ch = '';

     for (var i = 0; i < format.length; ++i) {

         ch = format.charAt(i);

         if (!special && ch == "\\") {

             special = true;

         }

         else if (special) {

             special = false;

             code += "'" + String.escape(ch) + "' + ";

         }

         else {

             code += Date.getFormatCode(ch);

         }

     }

     eval(code.substring(0, code.length - 3) + ";}");

 }

 Date.getFormatCode = function(character) {

     switch (character) {

     case "d":

         return "String.leftPad(this.getDate(), 2, '0') + ";

     case "D":

         return "Date.dayNames[this.getDay()].substring(0, 3) + ";

     case "j":

         return "this.getDate() + ";

     case "l":

         return "Date.dayNames[this.getDay()] + ";

     case "S":

         return "this.getSuffix() + ";

     case "w":

         return "this.getDay() + ";

     case "z":

         return "this.getDayOfYear() + ";

     case "W":

         return "this.getWeekOfYear() + ";

     case "F":

         return "Date.monthNames[this.getMonth()] + ";

     case "m":

         return "String.leftPad(this.getMonth() + 1, 2, '0') + ";

     case "M":

         return "Date.monthNames[this.getMonth()].substring(0, 3) + ";

     case "n":

         return "(this.getMonth() + 1) + ";

     case "t":

         return "this.getDaysInMonth() + ";

     case "L":

         return "(this.isLeapYear() ? 1 : 0) + ";

     case "Y":

         return "this.getFullYear() + ";

     case "y":

         return "('' + this.getFullYear()).substring(2, 4) + ";

     case "a":

         return "(this.getHours() < 12 ? 'am' : 'pm') + ";

     case "A":

         return "(this.getHours() < 12 ? 'AM' : 'PM') + ";

     case "g":

         return "((this.getHours() %12) ? this.getHours() % 12 : 12) + ";

     case "G":

         return "this.getHours() + ";

     case "h":

         return "String.leftPad((this.getHours() %12) ? this.getHours() % 12 : 12, 2, '0') + ";

     case "H":

         return "String.leftPad(this.getHours(), 2, '0') + ";

     case "i":

         return "String.leftPad(this.getMinutes(), 2, '0') + ";

     case "s":

         return "String.leftPad(this.getSeconds(), 2, '0') + ";

     case "O":

         return "this.getGMTOffset() + ";

     case "T":

         return "this.getTimezone() + ";

     case "Z":

         return "(this.getTimezoneOffset() * -60) + ";

     default:

         return "'" + String.escape(character) + "' + ";

     }

 }

 Date.parseDate = function(input, format) {

     if (Date.parseFunctions[format] == null) {

         Date.createParser(format);

     }

     var func = Date.parseFunctions[format];

     return Date[func](input);

 }

 Date.createParser = function(format) {

     var funcName = "parse" + Date.parseFunctions.count++;

     var regexNum = Date.parseRegexes.length;

     var currentGroup = 1;

     Date.parseFunctions[format] = funcName;

     var code = "Date." + funcName + " = function(input){\n"

         + "var y = -1, m = -1, d = -1, h = -1, i = -1, s = -1;\n"

         + "var d = new Date();\n"

         + "y = d.getFullYear();\n"

         + "m = d.getMonth();\n"

         + "d = d.getDate();\n"

         + "var results = input.match(Date.parseRegexes[" + regexNum + "]);\n"

         + "if (results && results.length > 0) {"

     var regex = "";

     var special = false;

     var ch = '';

     for (var i = 0; i < format.length; ++i) {

         ch = format.charAt(i);

         if (!special && ch == "\\") {

             special = true;

         }

         else if (special) {

             special = false;

             regex += String.escape(ch);

         }

         else {

             obj = Date.formatCodeToRegex(ch, currentGroup);

             currentGroup += obj.g;

             regex += obj.s;

             if (obj.g && obj.c) {

                 code += obj.c;

             }

         }

     }

     code += "if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0 && s >= 0)\n"

         + "{return new Date(y, m, d, h, i, s);}\n"

         + "else if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0)\n"

         + "{return new Date(y, m, d, h, i);}\n"

         + "else if (y > 0 && m >= 0 && d > 0 && h >= 0)\n"

         + "{return new Date(y, m, d, h);}\n"

         + "else if (y > 0 && m >= 0 && d > 0)\n"

         + "{return new Date(y, m, d);}\n"

         + "else if (y > 0 && m >= 0)\n"

         + "{return new Date(y, m);}\n"

         + "else if (y > 0)\n"

         + "{return new Date(y);}\n"

         + "}return null;}";

     Date.parseRegexes[regexNum] = new RegExp("^" + regex + "$");

     eval(code);

 }

 Date.formatCodeToRegex = function(character, currentGroup) {

     switch (character) {

     case "D":

         return {g:0,

         c:null,

         s:"(?:Sun|Mon|Tue|Wed|Thu|Fri|Sat)"};

     case "j":

     case "d":

         return {g:1,

             c:"d = parseInt(results[" + currentGroup + "], 10);\n",

             s:"(\\d{1,2})"};

     case "l":

         return {g:0,

             c:null,

             s:"(?:" + Date.dayNames.join("|") + ")"};

     case "S":

         return {g:0,

             c:null,

             s:"(?:st|nd|rd|th)"};

     case "w":

         return {g:0,

             c:null,

             s:"\\d"};

     case "z":

         return {g:0,

             c:null,

             s:"(?:\\d{1,3})"};

     case "W":

         return {g:0,

             c:null,

             s:"(?:\\d{2})"};

     case "F":

         return {g:1,

             c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "].substring(0, 3)], 10);\n",

             s:"(" + Date.monthNames.join("|") + ")"};

     case "M":

         return {g:1,

             c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "]], 10);\n",

             s:"(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)"};

     case "n":

     case "m":

         return {g:1,

             c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",

             s:"(\\d{1,2})"};

     case "t":

         return {g:0,

             c:null,

             s:"\\d{1,2}"};

     case "L":

         return {g:0,

             c:null,

             s:"(?:1|0)"};

     case "Y":

         return {g:1,

             c:"y = parseInt(results[" + currentGroup + "], 10);\n",

             s:"(\\d{4})"};

     case "y":

         return {g:1,

             c:"var ty = parseInt(results[" + currentGroup + "], 10);\n"

                 + "y = ty > Date.y2kYear ? 1900 + ty : 2000 + ty;\n",

             s:"(\\d{1,2})"};

     case "a":

         return {g:1,

             c:"if (results[" + currentGroup + "] == 'am') {\n"

                 + "if (h == 12) { h = 0; }\n"

                 + "} else { if (h < 12) { h += 12; }}",

             s:"(am|pm)"};

     case "A":

         return {g:1,

             c:"if (results[" + currentGroup + "] == 'AM') {\n"

                 + "if (h == 12) { h = 0; }\n"

                 + "} else { if (h < 12) { h += 12; }}",

             s:"(AM|PM)"};

     case "g":

     case "G":

     case "h":

     case "H":

         return {g:1,

             c:"h = parseInt(results[" + currentGroup + "], 10);\n",

             s:"(\\d{1,2})"};

     case "i":

         return {g:1,

             c:"i = parseInt(results[" + currentGroup + "], 10);\n",

             s:"(\\d{2})"};

     case "s":

         return {g:1,

             c:"s = parseInt(results[" + currentGroup + "], 10);\n",

             s:"(\\d{2})"};

     case "O":

         return {g:0,

             c:null,

             s:"[+-]\\d{4}"};

     case "T":

         return {g:0,

             c:null,

             s:"[A-Z]{3}"};

     case "Z":

         return {g:0,

             c:null,

             s:"[+-]\\d{1,5}"};

     default:

         return {g:0,

             c:null,

             s:String.escape(character)};

     }

 }

 Date.prototype.getTimezone = function() {

     return this.toString().replace(

         /^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1").replace(

         /^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3");

 }

 Date.prototype.getGMTOffset = function() {

     return (this.getTimezoneOffset() > 0 ? "-" : "+")

         + String.leftPad(Math.floor(this.getTimezoneOffset() / 60), 2, "0")

         + String.leftPad(this.getTimezoneOffset() % 60, 2, "0");

 }

 Date.prototype.getDayOfYear = function() {

     var num = 0;

     Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;

     for (var i = 0; i < this.getMonth(); ++i) {

         num += Date.daysInMonth[i];

     }

     return num + this.getDate() - 1;

 }

 Date.prototype.getWeekOfYear = function() {

     // Skip to Thursday of this week

     var now = this.getDayOfYear() + (4 - this.getDay());

     // Find the first Thursday of the year

     var jan1 = new Date(this.getFullYear(), 0, 1);

     var then = (7 - jan1.getDay() + 4);

     document.write(then);

     return String.leftPad(((now - then) / 7) + 1, 2, "0");

 }

 Date.prototype.isLeapYear = function() {

     var year = this.getFullYear();

     return ((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));

 }

 Date.prototype.getFirstDayOfMonth = function() {

     var day = (this.getDay() - (this.getDate() - 1)) % 7;

     return (day < 0) ? (day + 7) : day;

 }

 Date.prototype.getLastDayOfMonth = function() {

     var day = (this.getDay() + (Date.daysInMonth[this.getMonth()] - this.getDate())) % 7;

     return (day < 0) ? (day + 7) : day;

 }

 Date.prototype.getDaysInMonth = function() {

     Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;

     return Date.daysInMonth[this.getMonth()];

 }

 Date.prototype.getSuffix = function() {

     switch (this.getDate()) {

         case 1:

         case 21:

         case 31:

             return "st";

         case 2:

         case 22:

             return "nd";

         case 3:

         case 23:

             return "rd";

         default:

             return "th";

     }

 }

 String.escape = function(string) {

     return string.replace(/('|\\)/g, "\\$1");

 }

 String.leftPad = function (val, size, ch) {

     var result = new String(val);

     if (ch == null) {

         ch = " ";

     }

     while (result.length < size) {

         result = ch + result;

     }

     return result;

 }

 Date.daysInMonth = [31,28,31,30,31,30,31,31,30,31,30,31];

 Date.monthNames =

    ["January",

     "February",

     "March",

     "April",

     "May",

     "June",

     "July",

     "August",

     "September",

     "October",

     "November",

     "December"];

 Date.dayNames =

    ["Sunday",

     "Monday",

     "Tuesday",

     "Wednesday",

     "Thursday",

     "Friday",

     "Saturday"];

 Date.y2kYear = 50;

 Date.monthNumbers = {

     Jan:0,

     Feb:1,

     Mar:2,

     Apr:3,

     May:4,

     Jun:5,

     Jul:6,

     Aug:7,

     Sep:8,

     Oct:9,

     Nov:10,

     Dec:11};

 Date.patterns = {

     ISO8601LongPattern:"Y-m-d H:i:s",

     ISO8601ShortPattern:"Y-m-d",

     ShortDatePattern: "n/j/Y",

     LongDatePattern: "l, F d, Y",

     FullDateTimePattern: "l, F d, Y g:i:s A",

     MonthDayPattern: "F d",

     ShortTimePattern: "g:i A",

     LongTimePattern: "g:i:s A",

     SortableDateTimePattern: "Y-m-d\\TH:i:s",

     UniversalSortableDateTimePattern: "Y-m-d H:i:sO",

     YearMonthPattern: "F, Y"};

 var date = new Date("1/1/2007 1:11:11");

 var ret;

 for (i = 0; i < 4000; ++i) {

     var shortFormat = date.dateFormat("Y-m-d");

     var longFormat = date.dateFormat("l, F d, Y g:i:s A");

     ret = shortFormat + longFormat;

     date.setTime(date.getTime() + 84266956);

 }

 // No exact match because the output depends on the locale's time zone. See bug 524490.

 assertEq(/^2017-09-05Tuesday, September 05, 2017 [0-9:]* AM$/.exec(ret) != null, true);