michael@0: /*
michael@0:  * Copyright (C) 2004 Baron Schwartz <baron at sequent dot org>
michael@0:  *
michael@0:  * This program is free software; you can redistribute it and/or modify it
michael@0:  * under the terms of the GNU Lesser General Public License as published by the
michael@0:  * Free Software Foundation, version 2.1.
michael@0:  *
michael@0:  * This program is distributed in the hope that it will be useful, but WITHOUT
michael@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
michael@0:  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
michael@0:  * details.
michael@0:  */
michael@0: 
michael@0: Date.parseFunctions = {count:0};
michael@0: Date.parseRegexes = [];
michael@0: Date.formatFunctions = {count:0};
michael@0: 
michael@0: Date.prototype.dateFormat = function(format) {
michael@0:     if (Date.formatFunctions[format] == null) {
michael@0:         Date.createNewFormat(format);
michael@0:     }
michael@0:     var func = Date.formatFunctions[format];
michael@0:     return this[func]();
michael@0: }
michael@0: 
michael@0: Date.createNewFormat = function(format) {
michael@0:     var funcName = "format" + Date.formatFunctions.count++;
michael@0:     Date.formatFunctions[format] = funcName;
michael@0:     var code = "Date.prototype." + funcName + " = function(){return ";
michael@0:     var special = false;
michael@0:     var ch = '';
michael@0:     for (var i = 0; i < format.length; ++i) {
michael@0:         ch = format.charAt(i);
michael@0:         if (!special && ch == "\\") {
michael@0:             special = true;
michael@0:         }
michael@0:         else if (special) {
michael@0:             special = false;
michael@0:             code += "'" + String.escape(ch) + "' + ";
michael@0:         }
michael@0:         else {
michael@0:             code += Date.getFormatCode(ch);
michael@0:         }
michael@0:     }
michael@0:     eval(code.substring(0, code.length - 3) + ";}");
michael@0: }
michael@0: 
michael@0: Date.getFormatCode = function(character) {
michael@0:     switch (character) {
michael@0:     case "d":
michael@0:         return "String.leftPad(this.getDate(), 2, '0') + ";
michael@0:     case "D":
michael@0:         return "Date.dayNames[this.getDay()].substring(0, 3) + ";
michael@0:     case "j":
michael@0:         return "this.getDate() + ";
michael@0:     case "l":
michael@0:         return "Date.dayNames[this.getDay()] + ";
michael@0:     case "S":
michael@0:         return "this.getSuffix() + ";
michael@0:     case "w":
michael@0:         return "this.getDay() + ";
michael@0:     case "z":
michael@0:         return "this.getDayOfYear() + ";
michael@0:     case "W":
michael@0:         return "this.getWeekOfYear() + ";
michael@0:     case "F":
michael@0:         return "Date.monthNames[this.getMonth()] + ";
michael@0:     case "m":
michael@0:         return "String.leftPad(this.getMonth() + 1, 2, '0') + ";
michael@0:     case "M":
michael@0:         return "Date.monthNames[this.getMonth()].substring(0, 3) + ";
michael@0:     case "n":
michael@0:         return "(this.getMonth() + 1) + ";
michael@0:     case "t":
michael@0:         return "this.getDaysInMonth() + ";
michael@0:     case "L":
michael@0:         return "(this.isLeapYear() ? 1 : 0) + ";
michael@0:     case "Y":
michael@0:         return "this.getFullYear() + ";
michael@0:     case "y":
michael@0:         return "('' + this.getFullYear()).substring(2, 4) + ";
michael@0:     case "a":
michael@0:         return "(this.getHours() < 12 ? 'am' : 'pm') + ";
michael@0:     case "A":
michael@0:         return "(this.getHours() < 12 ? 'AM' : 'PM') + ";
michael@0:     case "g":
michael@0:         return "((this.getHours() %12) ? this.getHours() % 12 : 12) + ";
michael@0:     case "G":
michael@0:         return "this.getHours() + ";
michael@0:     case "h":
michael@0:         return "String.leftPad((this.getHours() %12) ? this.getHours() % 12 : 12, 2, '0') + ";
michael@0:     case "H":
michael@0:         return "String.leftPad(this.getHours(), 2, '0') + ";
michael@0:     case "i":
michael@0:         return "String.leftPad(this.getMinutes(), 2, '0') + ";
michael@0:     case "s":
michael@0:         return "String.leftPad(this.getSeconds(), 2, '0') + ";
michael@0:     case "O":
michael@0:         return "this.getGMTOffset() + ";
michael@0:     case "T":
michael@0:         return "this.getTimezone() + ";
michael@0:     case "Z":
michael@0:         return "(this.getTimezoneOffset() * -60) + ";
michael@0:     default:
michael@0:         return "'" + String.escape(character) + "' + ";
michael@0:     }
michael@0: }
michael@0: 
michael@0: Date.parseDate = function(input, format) {
michael@0:     if (Date.parseFunctions[format] == null) {
michael@0:         Date.createParser(format);
michael@0:     }
michael@0:     var func = Date.parseFunctions[format];
michael@0:     return Date[func](input);
michael@0: }
michael@0: 
michael@0: Date.createParser = function(format) {
michael@0:     var funcName = "parse" + Date.parseFunctions.count++;
michael@0:     var regexNum = Date.parseRegexes.length;
michael@0:     var currentGroup = 1;
michael@0:     Date.parseFunctions[format] = funcName;
michael@0: 
michael@0:     var code = "Date." + funcName + " = function(input){\n"
michael@0:         + "var y = -1, m = -1, d = -1, h = -1, i = -1, s = -1;\n"
michael@0:         + "var d = new Date();\n"
michael@0:         + "y = d.getFullYear();\n"
michael@0:         + "m = d.getMonth();\n"
michael@0:         + "d = d.getDate();\n"
michael@0:         + "var results = input.match(Date.parseRegexes[" + regexNum + "]);\n"
michael@0:         + "if (results && results.length > 0) {"
michael@0:     var regex = "";
michael@0: 
michael@0:     var special = false;
michael@0:     var ch = '';
michael@0:     for (var i = 0; i < format.length; ++i) {
michael@0:         ch = format.charAt(i);
michael@0:         if (!special && ch == "\\") {
michael@0:             special = true;
michael@0:         }
michael@0:         else if (special) {
michael@0:             special = false;
michael@0:             regex += String.escape(ch);
michael@0:         }
michael@0:         else {
michael@0:             obj = Date.formatCodeToRegex(ch, currentGroup);
michael@0:             currentGroup += obj.g;
michael@0:             regex += obj.s;
michael@0:             if (obj.g && obj.c) {
michael@0:                 code += obj.c;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     code += "if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0 && s >= 0)\n"
michael@0:         + "{return new Date(y, m, d, h, i, s);}\n"
michael@0:         + "else if (y > 0 && m >= 0 && d > 0 && h >= 0 && i >= 0)\n"
michael@0:         + "{return new Date(y, m, d, h, i);}\n"
michael@0:         + "else if (y > 0 && m >= 0 && d > 0 && h >= 0)\n"
michael@0:         + "{return new Date(y, m, d, h);}\n"
michael@0:         + "else if (y > 0 && m >= 0 && d > 0)\n"
michael@0:         + "{return new Date(y, m, d);}\n"
michael@0:         + "else if (y > 0 && m >= 0)\n"
michael@0:         + "{return new Date(y, m);}\n"
michael@0:         + "else if (y > 0)\n"
michael@0:         + "{return new Date(y);}\n"
michael@0:         + "}return null;}";
michael@0: 
michael@0:     Date.parseRegexes[regexNum] = new RegExp("^" + regex + "$");
michael@0:     eval(code);
michael@0: }
michael@0: 
michael@0: Date.formatCodeToRegex = function(character, currentGroup) {
michael@0:     switch (character) {
michael@0:     case "D":
michael@0:         return {g:0,
michael@0:         c:null,
michael@0:         s:"(?:Sun|Mon|Tue|Wed|Thu|Fri|Sat)"};
michael@0:     case "j":
michael@0:     case "d":
michael@0:         return {g:1,
michael@0:             c:"d = parseInt(results[" + currentGroup + "], 10);\n",
michael@0:             s:"(\\d{1,2})"};
michael@0:     case "l":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"(?:" + Date.dayNames.join("|") + ")"};
michael@0:     case "S":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"(?:st|nd|rd|th)"};
michael@0:     case "w":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"\\d"};
michael@0:     case "z":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"(?:\\d{1,3})"};
michael@0:     case "W":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"(?:\\d{2})"};
michael@0:     case "F":
michael@0:         return {g:1,
michael@0:             c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "].substring(0, 3)], 10);\n",
michael@0:             s:"(" + Date.monthNames.join("|") + ")"};
michael@0:     case "M":
michael@0:         return {g:1,
michael@0:             c:"m = parseInt(Date.monthNumbers[results[" + currentGroup + "]], 10);\n",
michael@0:             s:"(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)"};
michael@0:     case "n":
michael@0:     case "m":
michael@0:         return {g:1,
michael@0:             c:"m = parseInt(results[" + currentGroup + "], 10) - 1;\n",
michael@0:             s:"(\\d{1,2})"};
michael@0:     case "t":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"\\d{1,2}"};
michael@0:     case "L":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"(?:1|0)"};
michael@0:     case "Y":
michael@0:         return {g:1,
michael@0:             c:"y = parseInt(results[" + currentGroup + "], 10);\n",
michael@0:             s:"(\\d{4})"};
michael@0:     case "y":
michael@0:         return {g:1,
michael@0:             c:"var ty = parseInt(results[" + currentGroup + "], 10);\n"
michael@0:                 + "y = ty > Date.y2kYear ? 1900 + ty : 2000 + ty;\n",
michael@0:             s:"(\\d{1,2})"};
michael@0:     case "a":
michael@0:         return {g:1,
michael@0:             c:"if (results[" + currentGroup + "] == 'am') {\n"
michael@0:                 + "if (h == 12) { h = 0; }\n"
michael@0:                 + "} else { if (h < 12) { h += 12; }}",
michael@0:             s:"(am|pm)"};
michael@0:     case "A":
michael@0:         return {g:1,
michael@0:             c:"if (results[" + currentGroup + "] == 'AM') {\n"
michael@0:                 + "if (h == 12) { h = 0; }\n"
michael@0:                 + "} else { if (h < 12) { h += 12; }}",
michael@0:             s:"(AM|PM)"};
michael@0:     case "g":
michael@0:     case "G":
michael@0:     case "h":
michael@0:     case "H":
michael@0:         return {g:1,
michael@0:             c:"h = parseInt(results[" + currentGroup + "], 10);\n",
michael@0:             s:"(\\d{1,2})"};
michael@0:     case "i":
michael@0:         return {g:1,
michael@0:             c:"i = parseInt(results[" + currentGroup + "], 10);\n",
michael@0:             s:"(\\d{2})"};
michael@0:     case "s":
michael@0:         return {g:1,
michael@0:             c:"s = parseInt(results[" + currentGroup + "], 10);\n",
michael@0:             s:"(\\d{2})"};
michael@0:     case "O":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"[+-]\\d{4}"};
michael@0:     case "T":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"[A-Z]{3}"};
michael@0:     case "Z":
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:"[+-]\\d{1,5}"};
michael@0:     default:
michael@0:         return {g:0,
michael@0:             c:null,
michael@0:             s:String.escape(character)};
michael@0:     }
michael@0: }
michael@0: 
michael@0: Date.prototype.getTimezone = function() {
michael@0:     return this.toString().replace(
michael@0:         /^.*? ([A-Z]{3}) [0-9]{4}.*$/, "$1").replace(
michael@0:         /^.*?\(([A-Z])[a-z]+ ([A-Z])[a-z]+ ([A-Z])[a-z]+\)$/, "$1$2$3");
michael@0: }
michael@0: 
michael@0: Date.prototype.getGMTOffset = function() {
michael@0:     return (this.getTimezoneOffset() > 0 ? "-" : "+")
michael@0:         + String.leftPad(Math.floor(this.getTimezoneOffset() / 60), 2, "0")
michael@0:         + String.leftPad(this.getTimezoneOffset() % 60, 2, "0");
michael@0: }
michael@0: 
michael@0: Date.prototype.getDayOfYear = function() {
michael@0:     var num = 0;
michael@0:     Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
michael@0:     for (var i = 0; i < this.getMonth(); ++i) {
michael@0:         num += Date.daysInMonth[i];
michael@0:     }
michael@0:     return num + this.getDate() - 1;
michael@0: }
michael@0: 
michael@0: Date.prototype.getWeekOfYear = function() {
michael@0:     // Skip to Thursday of this week
michael@0:     var now = this.getDayOfYear() + (4 - this.getDay());
michael@0:     // Find the first Thursday of the year
michael@0:     var jan1 = new Date(this.getFullYear(), 0, 1);
michael@0:     var then = (7 - jan1.getDay() + 4);
michael@0:     document.write(then);
michael@0:     return String.leftPad(((now - then) / 7) + 1, 2, "0");
michael@0: }
michael@0: 
michael@0: Date.prototype.isLeapYear = function() {
michael@0:     var year = this.getFullYear();
michael@0:     return ((year & 3) == 0 && (year % 100 || (year % 400 == 0 && year)));
michael@0: }
michael@0: 
michael@0: Date.prototype.getFirstDayOfMonth = function() {
michael@0:     var day = (this.getDay() - (this.getDate() - 1)) % 7;
michael@0:     return (day < 0) ? (day + 7) : day;
michael@0: }
michael@0: 
michael@0: Date.prototype.getLastDayOfMonth = function() {
michael@0:     var day = (this.getDay() + (Date.daysInMonth[this.getMonth()] - this.getDate())) % 7;
michael@0:     return (day < 0) ? (day + 7) : day;
michael@0: }
michael@0: 
michael@0: Date.prototype.getDaysInMonth = function() {
michael@0:     Date.daysInMonth[1] = this.isLeapYear() ? 29 : 28;
michael@0:     return Date.daysInMonth[this.getMonth()];
michael@0: }
michael@0: 
michael@0: Date.prototype.getSuffix = function() {
michael@0:     switch (this.getDate()) {
michael@0:         case 1:
michael@0:         case 21:
michael@0:         case 31:
michael@0:             return "st";
michael@0:         case 2:
michael@0:         case 22:
michael@0:             return "nd";
michael@0:         case 3:
michael@0:         case 23:
michael@0:             return "rd";
michael@0:         default:
michael@0:             return "th";
michael@0:     }
michael@0: }
michael@0: 
michael@0: String.escape = function(string) {
michael@0:     return string.replace(/('|\\)/g, "\\$1");
michael@0: }
michael@0: 
michael@0: String.leftPad = function (val, size, ch) {
michael@0:     var result = new String(val);
michael@0:     if (ch == null) {
michael@0:         ch = " ";
michael@0:     }
michael@0:     while (result.length < size) {
michael@0:         result = ch + result;
michael@0:     }
michael@0:     return result;
michael@0: }
michael@0: 
michael@0: Date.daysInMonth = [31,28,31,30,31,30,31,31,30,31,30,31];
michael@0: Date.monthNames =
michael@0:    ["January",
michael@0:     "February",
michael@0:     "March",
michael@0:     "April",
michael@0:     "May",
michael@0:     "June",
michael@0:     "July",
michael@0:     "August",
michael@0:     "September",
michael@0:     "October",
michael@0:     "November",
michael@0:     "December"];
michael@0: Date.dayNames =
michael@0:    ["Sunday",
michael@0:     "Monday",
michael@0:     "Tuesday",
michael@0:     "Wednesday",
michael@0:     "Thursday",
michael@0:     "Friday",
michael@0:     "Saturday"];
michael@0: Date.y2kYear = 50;
michael@0: Date.monthNumbers = {
michael@0:     Jan:0,
michael@0:     Feb:1,
michael@0:     Mar:2,
michael@0:     Apr:3,
michael@0:     May:4,
michael@0:     Jun:5,
michael@0:     Jul:6,
michael@0:     Aug:7,
michael@0:     Sep:8,
michael@0:     Oct:9,
michael@0:     Nov:10,
michael@0:     Dec:11};
michael@0: Date.patterns = {
michael@0:     ISO8601LongPattern:"Y-m-d H:i:s",
michael@0:     ISO8601ShortPattern:"Y-m-d",
michael@0:     ShortDatePattern: "n/j/Y",
michael@0:     LongDatePattern: "l, F d, Y",
michael@0:     FullDateTimePattern: "l, F d, Y g:i:s A",
michael@0:     MonthDayPattern: "F d",
michael@0:     ShortTimePattern: "g:i A",
michael@0:     LongTimePattern: "g:i:s A",
michael@0:     SortableDateTimePattern: "Y-m-d\\TH:i:s",
michael@0:     UniversalSortableDateTimePattern: "Y-m-d H:i:sO",
michael@0:     YearMonthPattern: "F, Y"};
michael@0: 
michael@0: var date = new Date("1/1/2007 1:11:11");
michael@0: 
michael@0: var ret;
michael@0: for (i = 0; i < 4000; ++i) {
michael@0:     var shortFormat = date.dateFormat("Y-m-d");
michael@0:     var longFormat = date.dateFormat("l, F d, Y g:i:s A");
michael@0:     ret = shortFormat + longFormat;
michael@0:     date.setTime(date.getTime() + 84266956);
michael@0: }
michael@0: 
michael@0: // No exact match because the output depends on the locale's time zone. See bug 524490.
michael@0: assertEq(/^2017-09-05Tuesday, September 05, 2017 [0-9:]* AM$/.exec(ret) != null, true);