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/*
* Date Format 1.2.3
* (c) 2007-2009 Steven Levithan <stevenlevithan.com>
* MIT license
*
* Includes enhancements by Scott Trenda <scott.trenda.net>
* and Kris Kowal <cixar.com/~kris.kowal/>
*
* Accepts a date, a mask, or a date and a mask.
* Returns a formatted version of the given date.
* The date defaults to the current date/time.
* The mask defaults to dateFormat.masks.default.
*/
(function(global) {
'use strict';
var dateFormat = (function() {
var token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZWN]|'[^']*'|'[^']*'/g;
var timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g;
var timezoneClip = /[^-+\dA-Z]/g;
// Regexes and supporting functions are cached through closure
return function (date, mask, utc, gmt) {
// You can't provide utc if you skip other args (use the 'UTC:' mask prefix)
if (arguments.length === 1 && kindOf(date) === 'string' && !/\d/.test(date)) {
mask = date;
date = undefined;
}
date = date || new Date;
if(!(date instanceof Date)) {
date = new Date(date);
}
if (isNaN(date)) {
throw TypeError('Invalid date');
}
mask = String(dateFormat.masks[mask] || mask || dateFormat.masks['default']);
// Allow setting the utc/gmt argument via the mask
var maskSlice = mask.slice(0, 4);
if (maskSlice === 'UTC:' || maskSlice === 'GMT:') {
mask = mask.slice(4);
utc = true;
if (maskSlice === 'GMT:') {
gmt = true;
}
}
var _ = utc ? 'getUTC' : 'get';
var d = date[_ + 'Date']();
var D = date[_ + 'Day']();
var m = date[_ + 'Month']();
var y = date[_ + 'FullYear']();
var H = date[_ + 'Hours']();
var M = date[_ + 'Minutes']();
var s = date[_ + 'Seconds']();
var L = date[_ + 'Milliseconds']();
var o = utc ? 0 : date.getTimezoneOffset();
var W = getWeek(date);
var N = getDayOfWeek(date);
var flags = {
d: d,
dd: pad(d),
ddd: dateFormat.i18n.dayNames[D],
dddd: dateFormat.i18n.dayNames[D + 7],
m: m + 1,
mm: pad(m + 1),
mmm: dateFormat.i18n.monthNames[m],
mmmm: dateFormat.i18n.monthNames[m + 12],
yy: String(y).slice(2),
yyyy: y,
h: H % 12 || 12,
hh: pad(H % 12 || 12),
H: H,
HH: pad(H),
M: M,
MM: pad(M),
s: s,
ss: pad(s),
l: pad(L, 3),
L: pad(Math.round(L / 10)),
t: H < 12 ? 'a' : 'p',
tt: H < 12 ? 'am' : 'pm',
T: H < 12 ? 'A' : 'P',
TT: H < 12 ? 'AM' : 'PM',
Z: gmt ? 'GMT' : utc ? 'UTC' : (String(date).match(timezone) || ['']).pop().replace(timezoneClip, ''),
o: (o > 0 ? '-' : '+') + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
S: ['th', 'st', 'nd', 'rd'][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10],
W: W,
N: N
};
return mask.replace(token, function (match) {
if (match in flags) {
return flags[match];
}
return match.slice(1, match.length - 1);
});
};
})();
dateFormat.masks = {
'default': 'ddd mmm dd yyyy HH:MM:ss',
'shortDate': 'm/d/yy',
'mediumDate': 'mmm d, yyyy',
'longDate': 'mmmm d, yyyy',
'fullDate': 'dddd, mmmm d, yyyy',
'shortTime': 'h:MM TT',
'mediumTime': 'h:MM:ss TT',
'longTime': 'h:MM:ss TT Z',
'isoDate': 'yyyy-mm-dd',
'isoTime': 'HH:MM:ss',
'isoDateTime': 'yyyy-mm-dd\'T\'HH:MM:sso',
'isoUtcDateTime': 'UTC:yyyy-mm-dd\'T\'HH:MM:ss\'Z\'',
'expiresHeaderFormat': 'ddd, dd mmm yyyy HH:MM:ss Z'
};
// Internationalization strings
dateFormat.i18n = {
dayNames: [
'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat',
'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'
],
monthNames: [
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec',
'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'
]
};
function pad(val, len) {
val = String(val);
len = len || 2;
while (val.length < len) {
val = '0' + val;
}
return val;
}
/**
* Get the ISO 8601 week number
* Based on comments from
* http://techblog.procurios.nl/k/n618/news/view/33796/14863/Calculate-ISO-8601-week-and-year-in-javascript.html
*
* @param {Object} `date`
* @return {Number}
*/
function getWeek(date) {
// Remove time components of date
var targetThursday = new Date(date.getFullYear(), date.getMonth(), date.getDate());
// Change date to Thursday same week
targetThursday.setDate(targetThursday.getDate() - ((targetThursday.getDay() + 6) % 7) + 3);
// Take January 4th as it is always in week 1 (see ISO 8601)
var firstThursday = new Date(targetThursday.getFullYear(), 0, 4);
// Change date to Thursday same week
firstThursday.setDate(firstThursday.getDate() - ((firstThursday.getDay() + 6) % 7) + 3);
// Check if daylight-saving-time-switch occured and correct for it
var ds = targetThursday.getTimezoneOffset() - firstThursday.getTimezoneOffset();
targetThursday.setHours(targetThursday.getHours() - ds);
// Number of weeks between target Thursday and first Thursday
var weekDiff = (targetThursday - firstThursday) / (86400000*7);
return 1 + Math.floor(weekDiff);
}
/**
* Get ISO-8601 numeric representation of the day of the week
* 1 (for Monday) through 7 (for Sunday)
*
* @param {Object} `date`
* @return {Number}
*/
function getDayOfWeek(date) {
var dow = date.getDay();
if(dow === 0) {
dow = 7;
}
return dow;
}
/**
* kind-of shortcut
* @param {*} val
* @return {String}
*/
function kindOf(val) {
if (val === null) {
return 'null';
}
if (val === undefined) {
return 'undefined';
}
if (typeof val !== 'object') {
return typeof val;
}
if (Array.isArray(val)) {
return 'array';
}
return {}.toString.call(val)
.slice(8, -1).toLowerCase();
};
if (typeof define === 'function' && define.amd) {
define(function () {
return dateFormat;
});
} else if (typeof exports === 'object') {
module.exports = dateFormat;
} else {
global.dateFormat = dateFormat;
}
})(this);
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