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