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The MIT License (MIT)
Copyright (c) 2015 Taylor Hakes
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# fecha [![Build Status](https://travis-ci.org/taylorhakes/fecha.svg?branch=master)](https://travis-ci.org/taylorhakes/fecha)
Lightweight date formatting and parsing (~2KB). Meant to replace parsing and formatting functionality of moment.js.
### NPM
```
npm install fecha --save
```
### Yarn
```
yarn add fecha
```
### Fecha vs Moment
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th></th>
<th>Fecha</th>
<th>Moment</th>
</tr>
<tr>
<td><b>Size (Min. and Gzipped)</b></td>
<td>2.1KBs</td>
<td>13.1KBs</td>
</tr>
<tr>
<td><b>Date Parsing</b></td>
<td>&#x2713;</td>
<td>&#x2713;</td>
</tr>
<tr>
<td><b>Date Formatting</b></td>
<td>&#x2713;</td>
<td>&#x2713;</td>
</tr>
<tr>
<td><b>Date Manipulation</b></td>
<td></td>
<td>&#x2713;</td>
</tr>
<tr>
<td><b>I18n Support</b></td>
<td>&#x2713;</td>
<td>&#x2713;</td>
</tr>
</tbody>
</table>
## Use it
#### Formatting
`format` accepts a Date object (or timestamp) and a string format and returns a formatted string. See below for
available format tokens.
Note: `format` will throw an error when passed invalid parameters
```js
import { format } from 'fecha';
type format = (date: Date, format?: string, i18n?: I18nSettings) => str;
// Custom formats
format(new Date(2015, 10, 20), 'dddd MMMM Do, YYYY'); // 'Friday November 20th, 2015'
format(new Date(1998, 5, 3, 15, 23, 10, 350), 'YYYY-MM-DD hh:mm:ss.SSS A'); // '1998-06-03 03:23:10.350 PM'
// Named masks
format(new Date(2015, 10, 20), 'isoDate'); // '2015-11-20'
format(new Date(2015, 10, 20), 'mediumDate'); // 'Nov 20, 2015'
format(new Date(2015, 10, 20, 3, 2, 1), 'isoDateTime'); // '2015-11-20T03:02:01-05:00'
format(new Date(2015, 2, 10, 5, 30, 20), 'shortTime'); // '05:30'
// Literals
format(new Date(2001, 2, 5, 6, 7, 2, 5), '[on] MM-DD-YYYY [at] HH:mm'); // 'on 03-05-2001 at 06:07'
```
#### Parsing
`parse` accepts a Date string and a string format and returns a Date object. See below for available format tokens.
*NOTE*: `parse` will throw an error when passed invalid string format or missing format. You MUST specify a format.
```js
import { parse } from 'fecha';
type parse = (dateStr: string, format: string, i18n?: I18nSettingsOptional) => Date|null;
// Custom formats
parse('February 3rd, 2014', 'MMMM Do, YYYY'); // new Date(2014, 1, 3)
parse('10-12-10 14:11:12', 'YY-MM-DD HH:mm:ss'); // new Date(2010, 11, 10, 14, 11, 12)
// Named masks
parse('5/3/98', 'shortDate'); // new Date(1998, 4, 3)
parse('November 4, 2005', 'longDate'); // new Date(2005, 10, 4)
parse('2015-11-20T03:02:01-05:00', 'isoDateTime'); // new Date(2015, 10, 20, 3, 2, 1)
// Override i18n
parse('4 de octubre de 1983', 'M de MMMM de YYYY', {
monthNames: [
'enero',
'febrero',
'marzo',
'abril',
'mayo',
'junio',
'julio',
'agosto',
'septiembre',
'octubre',
'noviembre',
'diciembre'
]
}); // new Date(1983, 9, 4)
```
#### i18n Support
```js
import {setGlobalDateI18n} from 'fecha';
/*
Default I18n Settings
{
dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thur', 'Fri', 'Sat'],
dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
monthNames: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
amPm: ['am', 'pm'],
// D is the day of the month, function returns something like... 3rd or 11th
DoFn(dayOfMonth) {
return dayOfMonth + [ 'th', 'st', 'nd', 'rd' ][ dayOfMonth % 10 > 3 ? 0 : (dayOfMonth - dayOfMonth % 10 !== 10) * dayOfMonth % 10 ];
}
}
*/
setGlobalDateI18n({
dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thur', 'Fri', 'Sat'],
dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
monthNames: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
amPm: ['am', 'pm'],
// D is the day of the month, function returns something like... 3rd or 11th
DoFn: function (D) {
return D + [ 'th', 'st', 'nd', 'rd' ][ D % 10 > 3 ? 0 : (D - D % 10 !== 10) * D % 10 ];
}
});
```
#### Custom Named Masks
```js
import { format, setGlobalDateMasks } from 'fecha';
/*
Default global 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: 'HH:mm',
mediumTime: 'HH:mm:ss',
longTime: 'HH:mm:ss.SSS'
}
*/
// Create a new mask
setGlobalDateMasks({
myMask: 'HH:mm:ss YY/MM/DD';
});
// Use it
format(new Date(2014, 5, 6, 14, 10, 45), 'myMask'); // '14:10:45 14/06/06'
```
### Formatting Tokens
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th></th>
<th>Token</th>
<th>Output</th>
</tr>
<tr>
<td><b>Month</b></td>
<td>M</td>
<td>1 2 ... 11 12</td>
</tr>
<tr>
<td></td>
<td>MM</td>
<td>01 02 ... 11 12</td>
</tr>
<tr>
<td></td>
<td>MMM</td>
<td>Jan Feb ... Nov Dec</td>
</tr>
<tr>
<td></td>
<td>MMMM</td>
<td>January February ... November December</td>
</tr>
<tr>
<td><b>Day of Month</b></td>
<td>D</td>
<td>1 2 ... 30 31</td>
</tr>
<tr>
<td></td>
<td>Do</td>
<td>1st 2nd ... 30th 31st</td>
</tr>
<tr>
<td></td>
<td>DD</td>
<td>01 02 ... 30 31</td>
</tr>
<tr>
<td><b>Day of Week</b></td>
<td>d</td>
<td>0 1 ... 5 6</td>
</tr>
<tr>
<td></td>
<td>ddd</td>
<td>Sun Mon ... Fri Sat</td>
</tr>
<tr>
<td></td>
<td>dddd</td>
<td>Sunday Monday ... Friday Saturday</td>
</tr>
<tr>
<td><b>Year</b></td>
<td>YY</td>
<td>70 71 ... 29 30</td>
</tr>
<tr>
<td></td>
<td>YYYY</td>
<td>1970 1971 ... 2029 2030</td>
</tr>
<tr>
<td><b>AM/PM</b></td>
<td>A</td>
<td>AM PM</td>
</tr>
<tr>
<td></td>
<td>a</td>
<td>am pm</td>
</tr>
<tr>
<td><b>Hour</b></td>
<td>H</td>
<td>0 1 ... 22 23</td>
</tr>
<tr>
<td></td>
<td>HH</td>
<td>00 01 ... 22 23</td>
</tr>
<tr>
<td></td>
<td>h</td>
<td>1 2 ... 11 12</td>
</tr>
<tr>
<td></td>
<td>hh</td>
<td>01 02 ... 11 12</td>
</tr>
<tr>
<td><b>Minute</b></td>
<td>m</td>
<td>0 1 ... 58 59</td>
</tr>
<tr>
<td></td>
<td>mm</td>
<td>00 01 ... 58 59</td>
</tr>
<tr>
<td><b>Second</b></td>
<td>s</td>
<td>0 1 ... 58 59</td>
</tr>
<tr>
<td></td>
<td>ss</td>
<td>00 01 ... 58 59</td>
</tr>
<tr>
<td><b>Fractional Second</b></td>
<td>S</td>
<td>0 1 ... 8 9</td>
</tr>
<tr>
<td></td>
<td>SS</td>
<td>0 1 ... 98 99</td>
</tr>
<tr>
<td></td>
<td>SSS</td>
<td>0 1 ... 998 999</td>
</tr>
<tr>
<td><b>Timezone</b></td>
<td>Z</td>
<td>
-07:00 -06:00 ... +06:00 +07:00
</td>
</tr>
<tr>
<td><b></b></td>
<td>ZZ</td>
<td>
-0700 -0600 ... +0600 +0700
</td>
</tr>
</tbody>
</table>

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export declare type I18nSettings = {
amPm: [string, string];
dayNames: Days;
dayNamesShort: Days;
monthNames: Months;
monthNamesShort: Months;
DoFn(dayOfMonth: number): string;
};
export declare type I18nSettingsOptional = Partial<I18nSettings>;
export declare type Days = [string, string, string, string, string, string, string];
export declare type Months = [string, string, string, string, string, string, string, string, string, string, string, string];
export declare function assign<A>(a: A): A;
export declare function assign<A, B>(a: A, b: B): A & B;
export declare function assign<A, B, C>(a: A, b: B, c: C): A & B & C;
export declare function assign<A, B, C, D>(a: A, b: B, c: C, d: D): A & B & C & D;
declare const defaultI18n: I18nSettings;
declare const setGlobalDateI18n: (i18n: I18nSettingsOptional) => I18nSettings;
declare const setGlobalDateMasks: (masks: {
[key: string]: string;
}) => {
[key: string]: string;
};
/***
* Format a date
* @method format
* @param {Date|number} dateObj
* @param {string} mask Format of the date, i.e. 'mm-dd-yy' or 'shortDate'
* @returns {string} Formatted date string
*/
declare const format: (dateObj: Date, mask?: string, i18n?: I18nSettingsOptional) => string;
/**
* Parse a date string into a Javascript Date object /
* @method parse
* @param {string} dateStr Date string
* @param {string} format Date parse format
* @param {i18n} I18nSettingsOptional Full or subset of I18N settings
* @returns {Date|null} Returns Date object. Returns null what date string is invalid or doesn't match format
*/
declare function parse(dateStr: string, format: string, i18n?: I18nSettingsOptional): Date | null;
declare const _default: {
format: (dateObj: Date, mask?: string, i18n?: Partial<I18nSettings>) => string;
parse: typeof parse;
defaultI18n: I18nSettings;
setGlobalDateI18n: (i18n: Partial<I18nSettings>) => I18nSettings;
setGlobalDateMasks: (masks: {
[key: string]: string;
}) => {
[key: string]: string;
};
};
export default _default;
export { format, parse, defaultI18n, setGlobalDateI18n, setGlobalDateMasks };

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var token = /d{1,4}|M{1,4}|YY(?:YY)?|S{1,3}|Do|ZZ|Z|([HhMsDm])\1?|[aA]|"[^"]*"|'[^']*'/g;
var twoDigitsOptional = "\\d\\d?";
var twoDigits = "\\d\\d";
var threeDigits = "\\d{3}";
var fourDigits = "\\d{4}";
var word = "[^\\s]+";
var literal = /\[([^]*?)\]/gm;
function shorten(arr, sLen) {
var newArr = [];
for (var i = 0, len = arr.length; i < len; i++) {
newArr.push(arr[i].substr(0, sLen));
}
return newArr;
}
var monthUpdate = function (arrName) { return function (v, i18n) {
var lowerCaseArr = i18n[arrName].map(function (v) { return v.toLowerCase(); });
var index = lowerCaseArr.indexOf(v.toLowerCase());
if (index > -1) {
return index;
}
return null;
}; };
function assign(origObj) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
var obj = args_1[_a];
for (var key in obj) {
// @ts-ignore ex
origObj[key] = obj[key];
}
}
return origObj;
}
var dayNames = [
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
];
var monthNames = [
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
];
var monthNamesShort = shorten(monthNames, 3);
var dayNamesShort = shorten(dayNames, 3);
var defaultI18n = {
dayNamesShort: dayNamesShort,
dayNames: dayNames,
monthNamesShort: monthNamesShort,
monthNames: monthNames,
amPm: ["am", "pm"],
DoFn: function (dayOfMonth) {
return (dayOfMonth +
["th", "st", "nd", "rd"][dayOfMonth % 10 > 3
? 0
: ((dayOfMonth - (dayOfMonth % 10) !== 10 ? 1 : 0) * dayOfMonth) % 10]);
}
};
var globalI18n = assign({}, defaultI18n);
var setGlobalDateI18n = function (i18n) {
return (globalI18n = assign(globalI18n, i18n));
};
var regexEscape = function (str) {
return str.replace(/[|\\{()[^$+*?.-]/g, "\\$&");
};
var pad = function (val, len) {
if (len === void 0) { len = 2; }
val = String(val);
while (val.length < len) {
val = "0" + val;
}
return val;
};
var formatFlags = {
D: function (dateObj) { return String(dateObj.getDate()); },
DD: function (dateObj) { return pad(dateObj.getDate()); },
Do: function (dateObj, i18n) {
return i18n.DoFn(dateObj.getDate());
},
d: function (dateObj) { return String(dateObj.getDay()); },
dd: function (dateObj) { return pad(dateObj.getDay()); },
ddd: function (dateObj, i18n) {
return i18n.dayNamesShort[dateObj.getDay()];
},
dddd: function (dateObj, i18n) {
return i18n.dayNames[dateObj.getDay()];
},
M: function (dateObj) { return String(dateObj.getMonth() + 1); },
MM: function (dateObj) { return pad(dateObj.getMonth() + 1); },
MMM: function (dateObj, i18n) {
return i18n.monthNamesShort[dateObj.getMonth()];
},
MMMM: function (dateObj, i18n) {
return i18n.monthNames[dateObj.getMonth()];
},
YY: function (dateObj) {
return pad(String(dateObj.getFullYear()), 4).substr(2);
},
YYYY: function (dateObj) { return pad(dateObj.getFullYear(), 4); },
h: function (dateObj) { return String(dateObj.getHours() % 12 || 12); },
hh: function (dateObj) { return pad(dateObj.getHours() % 12 || 12); },
H: function (dateObj) { return String(dateObj.getHours()); },
HH: function (dateObj) { return pad(dateObj.getHours()); },
m: function (dateObj) { return String(dateObj.getMinutes()); },
mm: function (dateObj) { return pad(dateObj.getMinutes()); },
s: function (dateObj) { return String(dateObj.getSeconds()); },
ss: function (dateObj) { return pad(dateObj.getSeconds()); },
S: function (dateObj) {
return String(Math.round(dateObj.getMilliseconds() / 100));
},
SS: function (dateObj) {
return pad(Math.round(dateObj.getMilliseconds() / 10), 2);
},
SSS: function (dateObj) { return pad(dateObj.getMilliseconds(), 3); },
a: function (dateObj, i18n) {
return dateObj.getHours() < 12 ? i18n.amPm[0] : i18n.amPm[1];
},
A: function (dateObj, i18n) {
return dateObj.getHours() < 12
? i18n.amPm[0].toUpperCase()
: i18n.amPm[1].toUpperCase();
},
ZZ: function (dateObj) {
var offset = dateObj.getTimezoneOffset();
return ((offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60) * 100 + (Math.abs(offset) % 60), 4));
},
Z: function (dateObj) {
var offset = dateObj.getTimezoneOffset();
return ((offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60), 2) +
":" +
pad(Math.abs(offset) % 60, 2));
}
};
var monthParse = function (v) { return +v - 1; };
var emptyDigits = [null, twoDigitsOptional];
var emptyWord = [null, word];
var amPm = [
"isPm",
word,
function (v, i18n) {
var val = v.toLowerCase();
if (val === i18n.amPm[0]) {
return 0;
}
else if (val === i18n.amPm[1]) {
return 1;
}
return null;
}
];
var timezoneOffset = [
"timezoneOffset",
"[^\\s]*?[\\+\\-]\\d\\d:?\\d\\d|[^\\s]*?Z?",
function (v) {
var parts = (v + "").match(/([+-]|\d\d)/gi);
if (parts) {
var minutes = +parts[1] * 60 + parseInt(parts[2], 10);
return parts[0] === "+" ? minutes : -minutes;
}
return 0;
}
];
var parseFlags = {
D: ["day", twoDigitsOptional],
DD: ["day", twoDigits],
Do: ["day", twoDigitsOptional + word, function (v) { return parseInt(v, 10); }],
M: ["month", twoDigitsOptional, monthParse],
MM: ["month", twoDigits, monthParse],
YY: [
"year",
twoDigits,
function (v) {
var now = new Date();
var cent = +("" + now.getFullYear()).substr(0, 2);
return +("" + (+v > 68 ? cent - 1 : cent) + v);
}
],
h: ["hour", twoDigitsOptional, undefined, "isPm"],
hh: ["hour", twoDigits, undefined, "isPm"],
H: ["hour", twoDigitsOptional],
HH: ["hour", twoDigits],
m: ["minute", twoDigitsOptional],
mm: ["minute", twoDigits],
s: ["second", twoDigitsOptional],
ss: ["second", twoDigits],
YYYY: ["year", fourDigits],
S: ["millisecond", "\\d", function (v) { return +v * 100; }],
SS: ["millisecond", twoDigits, function (v) { return +v * 10; }],
SSS: ["millisecond", threeDigits],
d: emptyDigits,
dd: emptyDigits,
ddd: emptyWord,
dddd: emptyWord,
MMM: ["month", word, monthUpdate("monthNamesShort")],
MMMM: ["month", word, monthUpdate("monthNames")],
a: amPm,
A: amPm,
ZZ: timezoneOffset,
Z: timezoneOffset
};
// Some common format strings
var globalMasks = {
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",
isoDate: "YYYY-MM-DD",
isoDateTime: "YYYY-MM-DDTHH:mm:ssZ",
shortTime: "HH:mm",
mediumTime: "HH:mm:ss",
longTime: "HH:mm:ss.SSS"
};
var setGlobalDateMasks = function (masks) { return assign(globalMasks, masks); };
/***
* Format a date
* @method format
* @param {Date|number} dateObj
* @param {string} mask Format of the date, i.e. 'mm-dd-yy' or 'shortDate'
* @returns {string} Formatted date string
*/
var format = function (dateObj, mask, i18n) {
if (mask === void 0) { mask = globalMasks["default"]; }
if (i18n === void 0) { i18n = {}; }
if (typeof dateObj === "number") {
dateObj = new Date(dateObj);
}
if (Object.prototype.toString.call(dateObj) !== "[object Date]" ||
isNaN(dateObj.getTime())) {
throw new Error("Invalid Date pass to format");
}
mask = globalMasks[mask] || mask;
var literals = [];
// Make literals inactive by replacing them with @@@
mask = mask.replace(literal, function ($0, $1) {
literals.push($1);
return "@@@";
});
var combinedI18nSettings = assign(assign({}, globalI18n), i18n);
// Apply formatting rules
mask = mask.replace(token, function ($0) {
return formatFlags[$0](dateObj, combinedI18nSettings);
});
// Inline literal values back into the formatted value
return mask.replace(/@@@/g, function () { return literals.shift(); });
};
/**
* Parse a date string into a Javascript Date object /
* @method parse
* @param {string} dateStr Date string
* @param {string} format Date parse format
* @param {i18n} I18nSettingsOptional Full or subset of I18N settings
* @returns {Date|null} Returns Date object. Returns null what date string is invalid or doesn't match format
*/
function parse(dateStr, format, i18n) {
if (i18n === void 0) { i18n = {}; }
if (typeof format !== "string") {
throw new Error("Invalid format in fecha parse");
}
// Check to see if the format is actually a mask
format = globalMasks[format] || format;
// Avoid regular expression denial of service, fail early for really long strings
// https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS
if (dateStr.length > 1000) {
return null;
}
// Default to the beginning of the year.
var today = new Date();
var dateInfo = {
year: today.getFullYear(),
month: 0,
day: 1,
hour: 0,
minute: 0,
second: 0,
millisecond: 0,
isPm: null,
timezoneOffset: null
};
var parseInfo = [];
var literals = [];
// Replace all the literals with @@@. Hopefully a string that won't exist in the format
var newFormat = format.replace(literal, function ($0, $1) {
literals.push(regexEscape($1));
return "@@@";
});
var specifiedFields = {};
var requiredFields = {};
// Change every token that we find into the correct regex
newFormat = regexEscape(newFormat).replace(token, function ($0) {
var info = parseFlags[$0];
var field = info[0], regex = info[1], requiredField = info[3];
// Check if the person has specified the same field twice. This will lead to confusing results.
if (specifiedFields[field]) {
throw new Error("Invalid format. " + field + " specified twice in format");
}
specifiedFields[field] = true;
// Check if there are any required fields. For instance, 12 hour time requires AM/PM specified
if (requiredField) {
requiredFields[requiredField] = true;
}
parseInfo.push(info);
return "(" + regex + ")";
});
// Check all the required fields are present
Object.keys(requiredFields).forEach(function (field) {
if (!specifiedFields[field]) {
throw new Error("Invalid format. " + field + " is required in specified format");
}
});
// Add back all the literals after
newFormat = newFormat.replace(/@@@/g, function () { return literals.shift(); });
// Check if the date string matches the format. If it doesn't return null
var matches = dateStr.match(new RegExp(newFormat, "i"));
if (!matches) {
return null;
}
var combinedI18nSettings = assign(assign({}, globalI18n), i18n);
// For each match, call the parser function for that date part
for (var i = 1; i < matches.length; i++) {
var _a = parseInfo[i - 1], field = _a[0], parser = _a[2];
var value = parser
? parser(matches[i], combinedI18nSettings)
: +matches[i];
// If the parser can't make sense of the value, return null
if (value == null) {
return null;
}
dateInfo[field] = value;
}
if (dateInfo.isPm === 1 && dateInfo.hour != null && +dateInfo.hour !== 12) {
dateInfo.hour = +dateInfo.hour + 12;
}
else if (dateInfo.isPm === 0 && +dateInfo.hour === 12) {
dateInfo.hour = 0;
}
var dateTZ;
if (dateInfo.timezoneOffset == null) {
dateTZ = new Date(dateInfo.year, dateInfo.month, dateInfo.day, dateInfo.hour, dateInfo.minute, dateInfo.second, dateInfo.millisecond);
var validateFields = [
["month", "getMonth"],
["day", "getDate"],
["hour", "getHours"],
["minute", "getMinutes"],
["second", "getSeconds"]
];
for (var i = 0, len = validateFields.length; i < len; i++) {
// Check to make sure the date field is within the allowed range. Javascript dates allows values
// outside the allowed range. If the values don't match the value was invalid
if (specifiedFields[validateFields[i][0]] &&
dateInfo[validateFields[i][0]] !== dateTZ[validateFields[i][1]]()) {
return null;
}
}
}
else {
dateTZ = new Date(Date.UTC(dateInfo.year, dateInfo.month, dateInfo.day, dateInfo.hour, dateInfo.minute - dateInfo.timezoneOffset, dateInfo.second, dateInfo.millisecond));
// We can't validate dates in another timezone unfortunately. Do a basic check instead
if (dateInfo.month > 11 ||
dateInfo.month < 0 ||
dateInfo.day > 31 ||
dateInfo.day < 1 ||
dateInfo.hour > 23 ||
dateInfo.hour < 0 ||
dateInfo.minute > 59 ||
dateInfo.minute < 0 ||
dateInfo.second > 59 ||
dateInfo.second < 0) {
return null;
}
}
// Don't allow invalid dates
return dateTZ;
}
var fecha = {
format: format,
parse: parse,
defaultI18n: defaultI18n,
setGlobalDateI18n: setGlobalDateI18n,
setGlobalDateMasks: setGlobalDateMasks
};
export default fecha;
export { assign, format, parse, defaultI18n, setGlobalDateI18n, setGlobalDateMasks };
//# sourceMappingURL=fecha.js.map

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(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(factory((global.fecha = {})));
}(this, (function (exports) { 'use strict';
var token = /d{1,4}|M{1,4}|YY(?:YY)?|S{1,3}|Do|ZZ|Z|([HhMsDm])\1?|[aA]|"[^"]*"|'[^']*'/g;
var twoDigitsOptional = "\\d\\d?";
var twoDigits = "\\d\\d";
var threeDigits = "\\d{3}";
var fourDigits = "\\d{4}";
var word = "[^\\s]+";
var literal = /\[([^]*?)\]/gm;
function shorten(arr, sLen) {
var newArr = [];
for (var i = 0, len = arr.length; i < len; i++) {
newArr.push(arr[i].substr(0, sLen));
}
return newArr;
}
var monthUpdate = function (arrName) { return function (v, i18n) {
var lowerCaseArr = i18n[arrName].map(function (v) { return v.toLowerCase(); });
var index = lowerCaseArr.indexOf(v.toLowerCase());
if (index > -1) {
return index;
}
return null;
}; };
function assign(origObj) {
var args = [];
for (var _i = 1; _i < arguments.length; _i++) {
args[_i - 1] = arguments[_i];
}
for (var _a = 0, args_1 = args; _a < args_1.length; _a++) {
var obj = args_1[_a];
for (var key in obj) {
// @ts-ignore ex
origObj[key] = obj[key];
}
}
return origObj;
}
var dayNames = [
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
];
var monthNames = [
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
];
var monthNamesShort = shorten(monthNames, 3);
var dayNamesShort = shorten(dayNames, 3);
var defaultI18n = {
dayNamesShort: dayNamesShort,
dayNames: dayNames,
monthNamesShort: monthNamesShort,
monthNames: monthNames,
amPm: ["am", "pm"],
DoFn: function (dayOfMonth) {
return (dayOfMonth +
["th", "st", "nd", "rd"][dayOfMonth % 10 > 3
? 0
: ((dayOfMonth - (dayOfMonth % 10) !== 10 ? 1 : 0) * dayOfMonth) % 10]);
}
};
var globalI18n = assign({}, defaultI18n);
var setGlobalDateI18n = function (i18n) {
return (globalI18n = assign(globalI18n, i18n));
};
var regexEscape = function (str) {
return str.replace(/[|\\{()[^$+*?.-]/g, "\\$&");
};
var pad = function (val, len) {
if (len === void 0) { len = 2; }
val = String(val);
while (val.length < len) {
val = "0" + val;
}
return val;
};
var formatFlags = {
D: function (dateObj) { return String(dateObj.getDate()); },
DD: function (dateObj) { return pad(dateObj.getDate()); },
Do: function (dateObj, i18n) {
return i18n.DoFn(dateObj.getDate());
},
d: function (dateObj) { return String(dateObj.getDay()); },
dd: function (dateObj) { return pad(dateObj.getDay()); },
ddd: function (dateObj, i18n) {
return i18n.dayNamesShort[dateObj.getDay()];
},
dddd: function (dateObj, i18n) {
return i18n.dayNames[dateObj.getDay()];
},
M: function (dateObj) { return String(dateObj.getMonth() + 1); },
MM: function (dateObj) { return pad(dateObj.getMonth() + 1); },
MMM: function (dateObj, i18n) {
return i18n.monthNamesShort[dateObj.getMonth()];
},
MMMM: function (dateObj, i18n) {
return i18n.monthNames[dateObj.getMonth()];
},
YY: function (dateObj) {
return pad(String(dateObj.getFullYear()), 4).substr(2);
},
YYYY: function (dateObj) { return pad(dateObj.getFullYear(), 4); },
h: function (dateObj) { return String(dateObj.getHours() % 12 || 12); },
hh: function (dateObj) { return pad(dateObj.getHours() % 12 || 12); },
H: function (dateObj) { return String(dateObj.getHours()); },
HH: function (dateObj) { return pad(dateObj.getHours()); },
m: function (dateObj) { return String(dateObj.getMinutes()); },
mm: function (dateObj) { return pad(dateObj.getMinutes()); },
s: function (dateObj) { return String(dateObj.getSeconds()); },
ss: function (dateObj) { return pad(dateObj.getSeconds()); },
S: function (dateObj) {
return String(Math.round(dateObj.getMilliseconds() / 100));
},
SS: function (dateObj) {
return pad(Math.round(dateObj.getMilliseconds() / 10), 2);
},
SSS: function (dateObj) { return pad(dateObj.getMilliseconds(), 3); },
a: function (dateObj, i18n) {
return dateObj.getHours() < 12 ? i18n.amPm[0] : i18n.amPm[1];
},
A: function (dateObj, i18n) {
return dateObj.getHours() < 12
? i18n.amPm[0].toUpperCase()
: i18n.amPm[1].toUpperCase();
},
ZZ: function (dateObj) {
var offset = dateObj.getTimezoneOffset();
return ((offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60) * 100 + (Math.abs(offset) % 60), 4));
},
Z: function (dateObj) {
var offset = dateObj.getTimezoneOffset();
return ((offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60), 2) +
":" +
pad(Math.abs(offset) % 60, 2));
}
};
var monthParse = function (v) { return +v - 1; };
var emptyDigits = [null, twoDigitsOptional];
var emptyWord = [null, word];
var amPm = [
"isPm",
word,
function (v, i18n) {
var val = v.toLowerCase();
if (val === i18n.amPm[0]) {
return 0;
}
else if (val === i18n.amPm[1]) {
return 1;
}
return null;
}
];
var timezoneOffset = [
"timezoneOffset",
"[^\\s]*?[\\+\\-]\\d\\d:?\\d\\d|[^\\s]*?Z?",
function (v) {
var parts = (v + "").match(/([+-]|\d\d)/gi);
if (parts) {
var minutes = +parts[1] * 60 + parseInt(parts[2], 10);
return parts[0] === "+" ? minutes : -minutes;
}
return 0;
}
];
var parseFlags = {
D: ["day", twoDigitsOptional],
DD: ["day", twoDigits],
Do: ["day", twoDigitsOptional + word, function (v) { return parseInt(v, 10); }],
M: ["month", twoDigitsOptional, monthParse],
MM: ["month", twoDigits, monthParse],
YY: [
"year",
twoDigits,
function (v) {
var now = new Date();
var cent = +("" + now.getFullYear()).substr(0, 2);
return +("" + (+v > 68 ? cent - 1 : cent) + v);
}
],
h: ["hour", twoDigitsOptional, undefined, "isPm"],
hh: ["hour", twoDigits, undefined, "isPm"],
H: ["hour", twoDigitsOptional],
HH: ["hour", twoDigits],
m: ["minute", twoDigitsOptional],
mm: ["minute", twoDigits],
s: ["second", twoDigitsOptional],
ss: ["second", twoDigits],
YYYY: ["year", fourDigits],
S: ["millisecond", "\\d", function (v) { return +v * 100; }],
SS: ["millisecond", twoDigits, function (v) { return +v * 10; }],
SSS: ["millisecond", threeDigits],
d: emptyDigits,
dd: emptyDigits,
ddd: emptyWord,
dddd: emptyWord,
MMM: ["month", word, monthUpdate("monthNamesShort")],
MMMM: ["month", word, monthUpdate("monthNames")],
a: amPm,
A: amPm,
ZZ: timezoneOffset,
Z: timezoneOffset
};
// Some common format strings
var globalMasks = {
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",
isoDate: "YYYY-MM-DD",
isoDateTime: "YYYY-MM-DDTHH:mm:ssZ",
shortTime: "HH:mm",
mediumTime: "HH:mm:ss",
longTime: "HH:mm:ss.SSS"
};
var setGlobalDateMasks = function (masks) { return assign(globalMasks, masks); };
/***
* Format a date
* @method format
* @param {Date|number} dateObj
* @param {string} mask Format of the date, i.e. 'mm-dd-yy' or 'shortDate'
* @returns {string} Formatted date string
*/
var format = function (dateObj, mask, i18n) {
if (mask === void 0) { mask = globalMasks["default"]; }
if (i18n === void 0) { i18n = {}; }
if (typeof dateObj === "number") {
dateObj = new Date(dateObj);
}
if (Object.prototype.toString.call(dateObj) !== "[object Date]" ||
isNaN(dateObj.getTime())) {
throw new Error("Invalid Date pass to format");
}
mask = globalMasks[mask] || mask;
var literals = [];
// Make literals inactive by replacing them with @@@
mask = mask.replace(literal, function ($0, $1) {
literals.push($1);
return "@@@";
});
var combinedI18nSettings = assign(assign({}, globalI18n), i18n);
// Apply formatting rules
mask = mask.replace(token, function ($0) {
return formatFlags[$0](dateObj, combinedI18nSettings);
});
// Inline literal values back into the formatted value
return mask.replace(/@@@/g, function () { return literals.shift(); });
};
/**
* Parse a date string into a Javascript Date object /
* @method parse
* @param {string} dateStr Date string
* @param {string} format Date parse format
* @param {i18n} I18nSettingsOptional Full or subset of I18N settings
* @returns {Date|null} Returns Date object. Returns null what date string is invalid or doesn't match format
*/
function parse(dateStr, format, i18n) {
if (i18n === void 0) { i18n = {}; }
if (typeof format !== "string") {
throw new Error("Invalid format in fecha parse");
}
// Check to see if the format is actually a mask
format = globalMasks[format] || format;
// Avoid regular expression denial of service, fail early for really long strings
// https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS
if (dateStr.length > 1000) {
return null;
}
// Default to the beginning of the year.
var today = new Date();
var dateInfo = {
year: today.getFullYear(),
month: 0,
day: 1,
hour: 0,
minute: 0,
second: 0,
millisecond: 0,
isPm: null,
timezoneOffset: null
};
var parseInfo = [];
var literals = [];
// Replace all the literals with @@@. Hopefully a string that won't exist in the format
var newFormat = format.replace(literal, function ($0, $1) {
literals.push(regexEscape($1));
return "@@@";
});
var specifiedFields = {};
var requiredFields = {};
// Change every token that we find into the correct regex
newFormat = regexEscape(newFormat).replace(token, function ($0) {
var info = parseFlags[$0];
var field = info[0], regex = info[1], requiredField = info[3];
// Check if the person has specified the same field twice. This will lead to confusing results.
if (specifiedFields[field]) {
throw new Error("Invalid format. " + field + " specified twice in format");
}
specifiedFields[field] = true;
// Check if there are any required fields. For instance, 12 hour time requires AM/PM specified
if (requiredField) {
requiredFields[requiredField] = true;
}
parseInfo.push(info);
return "(" + regex + ")";
});
// Check all the required fields are present
Object.keys(requiredFields).forEach(function (field) {
if (!specifiedFields[field]) {
throw new Error("Invalid format. " + field + " is required in specified format");
}
});
// Add back all the literals after
newFormat = newFormat.replace(/@@@/g, function () { return literals.shift(); });
// Check if the date string matches the format. If it doesn't return null
var matches = dateStr.match(new RegExp(newFormat, "i"));
if (!matches) {
return null;
}
var combinedI18nSettings = assign(assign({}, globalI18n), i18n);
// For each match, call the parser function for that date part
for (var i = 1; i < matches.length; i++) {
var _a = parseInfo[i - 1], field = _a[0], parser = _a[2];
var value = parser
? parser(matches[i], combinedI18nSettings)
: +matches[i];
// If the parser can't make sense of the value, return null
if (value == null) {
return null;
}
dateInfo[field] = value;
}
if (dateInfo.isPm === 1 && dateInfo.hour != null && +dateInfo.hour !== 12) {
dateInfo.hour = +dateInfo.hour + 12;
}
else if (dateInfo.isPm === 0 && +dateInfo.hour === 12) {
dateInfo.hour = 0;
}
var dateTZ;
if (dateInfo.timezoneOffset == null) {
dateTZ = new Date(dateInfo.year, dateInfo.month, dateInfo.day, dateInfo.hour, dateInfo.minute, dateInfo.second, dateInfo.millisecond);
var validateFields = [
["month", "getMonth"],
["day", "getDate"],
["hour", "getHours"],
["minute", "getMinutes"],
["second", "getSeconds"]
];
for (var i = 0, len = validateFields.length; i < len; i++) {
// Check to make sure the date field is within the allowed range. Javascript dates allows values
// outside the allowed range. If the values don't match the value was invalid
if (specifiedFields[validateFields[i][0]] &&
dateInfo[validateFields[i][0]] !== dateTZ[validateFields[i][1]]()) {
return null;
}
}
}
else {
dateTZ = new Date(Date.UTC(dateInfo.year, dateInfo.month, dateInfo.day, dateInfo.hour, dateInfo.minute - dateInfo.timezoneOffset, dateInfo.second, dateInfo.millisecond));
// We can't validate dates in another timezone unfortunately. Do a basic check instead
if (dateInfo.month > 11 ||
dateInfo.month < 0 ||
dateInfo.day > 31 ||
dateInfo.day < 1 ||
dateInfo.hour > 23 ||
dateInfo.hour < 0 ||
dateInfo.minute > 59 ||
dateInfo.minute < 0 ||
dateInfo.second > 59 ||
dateInfo.second < 0) {
return null;
}
}
// Don't allow invalid dates
return dateTZ;
}
var fecha = {
format: format,
parse: parse,
defaultI18n: defaultI18n,
setGlobalDateI18n: setGlobalDateI18n,
setGlobalDateMasks: setGlobalDateMasks
};
exports.assign = assign;
exports.default = fecha;
exports.format = format;
exports.parse = parse;
exports.defaultI18n = defaultI18n;
exports.setGlobalDateI18n = setGlobalDateI18n;
exports.setGlobalDateMasks = setGlobalDateMasks;
Object.defineProperty(exports, '__esModule', { value: true });
})));
//# sourceMappingURL=fecha.umd.js.map

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{
"name": "fecha",
"version": "4.2.3",
"description": "Date formatting and parsing",
"main": "lib/fecha.umd.js",
"module": "lib/fecha.js",
"scripts": {
"test-only": "ts-node test.js",
"test": "prettier --check *.js src/*.ts && eslint --ext .ts src && npm run build && nyc --cache --reporter=text ts-node test.js",
"build": "NODE_ENV=production rollup -c --sourcemap && tsc",
"format": "prettier --write *.js src/*.ts"
},
"repository": {
"type": "git",
"url": "https://taylorhakes@github.com/taylorhakes/fecha.git"
},
"keywords": [
"date",
"parse",
"moment",
"format",
"fecha",
"formatting"
],
"author": "Taylor Hakes",
"license": "MIT",
"bugs": {
"url": "https://github.com/taylorhakes/fecha/issues"
},
"homepage": "https://github.com/taylorhakes/fecha",
"devDependencies": {
"@istanbuljs/nyc-config-typescript": "^1.0.1",
"@typescript-eslint/eslint-plugin": "^2.14.0",
"@typescript-eslint/parser": "^2.14.0",
"eslint": "^7.23.0",
"eslint-config-prettier": "^8.1.0",
"nyc": "^15.0.0",
"painless": "^0.9.7",
"prettier": "1.19.1",
"rollup": "^0.59.0",
"rollup-plugin-sourcemaps": "^0.5.0",
"rollup-plugin-typescript": "^1.0.1",
"rollup-plugin-uglify": "^3.0.0",
"source-map-support": "^0.5.16",
"ts-node": "^8.5.4",
"tslib": "^1.10.0",
"typescript": "^3.7.4"
},
"files": [
"lib",
"dist",
"src"
],
"types": "lib/fecha.d.ts"
}

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const token = /d{1,4}|M{1,4}|YY(?:YY)?|S{1,3}|Do|ZZ|Z|([HhMsDm])\1?|[aA]|"[^"]*"|'[^']*'/g;
const twoDigitsOptional = "\\d\\d?";
const twoDigits = "\\d\\d";
const threeDigits = "\\d{3}";
const fourDigits = "\\d{4}";
const word = "[^\\s]+";
const literal = /\[([^]*?)\]/gm;
type DateInfo = {
year: number;
month: number;
day: number;
hour: number;
minute: number;
second: number;
millisecond: number;
isPm: number | null;
timezoneOffset: number | null;
};
export type I18nSettings = {
amPm: [string, string];
dayNames: Days;
dayNamesShort: Days;
monthNames: Months;
monthNamesShort: Months;
DoFn(dayOfMonth: number): string;
};
export type I18nSettingsOptional = Partial<I18nSettings>;
export type Days = [string, string, string, string, string, string, string];
export type Months = [
string,
string,
string,
string,
string,
string,
string,
string,
string,
string,
string,
string
];
function shorten<T extends string[]>(arr: T, sLen: number): string[] {
const newArr: string[] = [];
for (let i = 0, len = arr.length; i < len; i++) {
newArr.push(arr[i].substr(0, sLen));
}
return newArr;
}
const monthUpdate = (
arrName: "monthNames" | "monthNamesShort" | "dayNames" | "dayNamesShort"
) => (v: string, i18n: I18nSettings): number | null => {
const lowerCaseArr = i18n[arrName].map(v => v.toLowerCase());
const index = lowerCaseArr.indexOf(v.toLowerCase());
if (index > -1) {
return index;
}
return null;
};
export function assign<A>(a: A): A;
export function assign<A, B>(a: A, b: B): A & B;
export function assign<A, B, C>(a: A, b: B, c: C): A & B & C;
export function assign<A, B, C, D>(a: A, b: B, c: C, d: D): A & B & C & D;
export function assign(origObj: any, ...args: any[]): any {
for (const obj of args) {
for (const key in obj) {
// @ts-ignore ex
origObj[key] = obj[key];
}
}
return origObj;
}
const dayNames: Days = [
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
];
const monthNames: Months = [
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
];
const monthNamesShort: Months = shorten(monthNames, 3) as Months;
const dayNamesShort: Days = shorten(dayNames, 3) as Days;
const defaultI18n: I18nSettings = {
dayNamesShort,
dayNames,
monthNamesShort,
monthNames,
amPm: ["am", "pm"],
DoFn(dayOfMonth: number) {
return (
dayOfMonth +
["th", "st", "nd", "rd"][
dayOfMonth % 10 > 3
? 0
: ((dayOfMonth - (dayOfMonth % 10) !== 10 ? 1 : 0) * dayOfMonth) % 10
]
);
}
};
let globalI18n = assign({}, defaultI18n);
const setGlobalDateI18n = (i18n: I18nSettingsOptional): I18nSettings =>
(globalI18n = assign(globalI18n, i18n));
const regexEscape = (str: string): string =>
str.replace(/[|\\{()[^$+*?.-]/g, "\\$&");
const pad = (val: string | number, len = 2): string => {
val = String(val);
while (val.length < len) {
val = "0" + val;
}
return val;
};
const formatFlags: Record<
string,
(dateObj: Date, i18n: I18nSettings) => string
> = {
D: (dateObj: Date): string => String(dateObj.getDate()),
DD: (dateObj: Date): string => pad(dateObj.getDate()),
Do: (dateObj: Date, i18n: I18nSettings): string =>
i18n.DoFn(dateObj.getDate()),
d: (dateObj: Date): string => String(dateObj.getDay()),
dd: (dateObj: Date): string => pad(dateObj.getDay()),
ddd: (dateObj: Date, i18n: I18nSettings): string =>
i18n.dayNamesShort[dateObj.getDay()],
dddd: (dateObj: Date, i18n: I18nSettings): string =>
i18n.dayNames[dateObj.getDay()],
M: (dateObj: Date): string => String(dateObj.getMonth() + 1),
MM: (dateObj: Date): string => pad(dateObj.getMonth() + 1),
MMM: (dateObj: Date, i18n: I18nSettings): string =>
i18n.monthNamesShort[dateObj.getMonth()],
MMMM: (dateObj: Date, i18n: I18nSettings): string =>
i18n.monthNames[dateObj.getMonth()],
YY: (dateObj: Date): string =>
pad(String(dateObj.getFullYear()), 4).substr(2),
YYYY: (dateObj: Date): string => pad(dateObj.getFullYear(), 4),
h: (dateObj: Date): string => String(dateObj.getHours() % 12 || 12),
hh: (dateObj: Date): string => pad(dateObj.getHours() % 12 || 12),
H: (dateObj: Date): string => String(dateObj.getHours()),
HH: (dateObj: Date): string => pad(dateObj.getHours()),
m: (dateObj: Date): string => String(dateObj.getMinutes()),
mm: (dateObj: Date): string => pad(dateObj.getMinutes()),
s: (dateObj: Date): string => String(dateObj.getSeconds()),
ss: (dateObj: Date): string => pad(dateObj.getSeconds()),
S: (dateObj: Date): string =>
String(Math.round(dateObj.getMilliseconds() / 100)),
SS: (dateObj: Date): string =>
pad(Math.round(dateObj.getMilliseconds() / 10), 2),
SSS: (dateObj: Date): string => pad(dateObj.getMilliseconds(), 3),
a: (dateObj: Date, i18n: I18nSettings): string =>
dateObj.getHours() < 12 ? i18n.amPm[0] : i18n.amPm[1],
A: (dateObj: Date, i18n: I18nSettings): string =>
dateObj.getHours() < 12
? i18n.amPm[0].toUpperCase()
: i18n.amPm[1].toUpperCase(),
ZZ(dateObj: Date): string {
const offset = dateObj.getTimezoneOffset();
return (
(offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60) * 100 + (Math.abs(offset) % 60), 4)
);
},
Z(dateObj: Date): string {
const offset = dateObj.getTimezoneOffset();
return (
(offset > 0 ? "-" : "+") +
pad(Math.floor(Math.abs(offset) / 60), 2) +
":" +
pad(Math.abs(offset) % 60, 2)
);
}
};
type ParseInfo = [
keyof DateInfo,
string,
((v: string, i18n: I18nSettings) => number | null)?,
string?
];
const monthParse = (v: string): number => +v - 1;
const emptyDigits: ParseInfo = [null, twoDigitsOptional];
const emptyWord: ParseInfo = [null, word];
const amPm: ParseInfo = [
"isPm",
word,
(v: string, i18n: I18nSettings): number | null => {
const val = v.toLowerCase();
if (val === i18n.amPm[0]) {
return 0;
} else if (val === i18n.amPm[1]) {
return 1;
}
return null;
}
];
const timezoneOffset: ParseInfo = [
"timezoneOffset",
"[^\\s]*?[\\+\\-]\\d\\d:?\\d\\d|[^\\s]*?Z?",
(v: string): number | null => {
const parts = (v + "").match(/([+-]|\d\d)/gi);
if (parts) {
const minutes = +parts[1] * 60 + parseInt(parts[2], 10);
return parts[0] === "+" ? minutes : -minutes;
}
return 0;
}
];
const parseFlags: Record<string, ParseInfo> = {
D: ["day", twoDigitsOptional],
DD: ["day", twoDigits],
Do: ["day", twoDigitsOptional + word, (v: string): number => parseInt(v, 10)],
M: ["month", twoDigitsOptional, monthParse],
MM: ["month", twoDigits, monthParse],
YY: [
"year",
twoDigits,
(v: string): number => {
const now = new Date();
const cent = +("" + now.getFullYear()).substr(0, 2);
return +("" + (+v > 68 ? cent - 1 : cent) + v);
}
],
h: ["hour", twoDigitsOptional, undefined, "isPm"],
hh: ["hour", twoDigits, undefined, "isPm"],
H: ["hour", twoDigitsOptional],
HH: ["hour", twoDigits],
m: ["minute", twoDigitsOptional],
mm: ["minute", twoDigits],
s: ["second", twoDigitsOptional],
ss: ["second", twoDigits],
YYYY: ["year", fourDigits],
S: ["millisecond", "\\d", (v: string): number => +v * 100],
SS: ["millisecond", twoDigits, (v: string): number => +v * 10],
SSS: ["millisecond", threeDigits],
d: emptyDigits,
dd: emptyDigits,
ddd: emptyWord,
dddd: emptyWord,
MMM: ["month", word, monthUpdate("monthNamesShort")],
MMMM: ["month", word, monthUpdate("monthNames")],
a: amPm,
A: amPm,
ZZ: timezoneOffset,
Z: timezoneOffset
};
// Some common format strings
const globalMasks: { [key: string]: string } = {
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",
isoDate: "YYYY-MM-DD",
isoDateTime: "YYYY-MM-DDTHH:mm:ssZ",
shortTime: "HH:mm",
mediumTime: "HH:mm:ss",
longTime: "HH:mm:ss.SSS"
};
const setGlobalDateMasks = (masks: {
[key: string]: string;
}): { [key: string]: string } => assign(globalMasks, masks);
/***
* Format a date
* @method format
* @param {Date|number} dateObj
* @param {string} mask Format of the date, i.e. 'mm-dd-yy' or 'shortDate'
* @returns {string} Formatted date string
*/
const format = (
dateObj: Date,
mask: string = globalMasks["default"],
i18n: I18nSettingsOptional = {}
): string => {
if (typeof dateObj === "number") {
dateObj = new Date(dateObj);
}
if (
Object.prototype.toString.call(dateObj) !== "[object Date]" ||
isNaN(dateObj.getTime())
) {
throw new Error("Invalid Date pass to format");
}
mask = globalMasks[mask] || mask;
const literals: string[] = [];
// Make literals inactive by replacing them with @@@
mask = mask.replace(literal, function($0, $1) {
literals.push($1);
return "@@@";
});
const combinedI18nSettings: I18nSettings = assign(
assign({}, globalI18n),
i18n
);
// Apply formatting rules
mask = mask.replace(token, $0 =>
formatFlags[$0](dateObj, combinedI18nSettings)
);
// Inline literal values back into the formatted value
return mask.replace(/@@@/g, () => literals.shift());
};
/**
* Parse a date string into a Javascript Date object /
* @method parse
* @param {string} dateStr Date string
* @param {string} format Date parse format
* @param {i18n} I18nSettingsOptional Full or subset of I18N settings
* @returns {Date|null} Returns Date object. Returns null what date string is invalid or doesn't match format
*/
function parse(
dateStr: string,
format: string,
i18n: I18nSettingsOptional = {}
): Date | null {
if (typeof format !== "string") {
throw new Error("Invalid format in fecha parse");
}
// Check to see if the format is actually a mask
format = globalMasks[format] || format;
// Avoid regular expression denial of service, fail early for really long strings
// https://www.owasp.org/index.php/Regular_expression_Denial_of_Service_-_ReDoS
if (dateStr.length > 1000) {
return null;
}
// Default to the beginning of the year.
const today = new Date();
const dateInfo: DateInfo = {
year: today.getFullYear(),
month: 0,
day: 1,
hour: 0,
minute: 0,
second: 0,
millisecond: 0,
isPm: null,
timezoneOffset: null
};
const parseInfo: ParseInfo[] = [];
const literals: string[] = [];
// Replace all the literals with @@@. Hopefully a string that won't exist in the format
let newFormat = format.replace(literal, ($0, $1) => {
literals.push(regexEscape($1));
return "@@@";
});
const specifiedFields: { [field: string]: boolean } = {};
const requiredFields: { [field: string]: boolean } = {};
// Change every token that we find into the correct regex
newFormat = regexEscape(newFormat).replace(token, $0 => {
const info = parseFlags[$0];
const [field, regex, , requiredField] = info;
// Check if the person has specified the same field twice. This will lead to confusing results.
if (specifiedFields[field]) {
throw new Error(`Invalid format. ${field} specified twice in format`);
}
specifiedFields[field] = true;
// Check if there are any required fields. For instance, 12 hour time requires AM/PM specified
if (requiredField) {
requiredFields[requiredField] = true;
}
parseInfo.push(info);
return "(" + regex + ")";
});
// Check all the required fields are present
Object.keys(requiredFields).forEach(field => {
if (!specifiedFields[field]) {
throw new Error(
`Invalid format. ${field} is required in specified format`
);
}
});
// Add back all the literals after
newFormat = newFormat.replace(/@@@/g, () => literals.shift());
// Check if the date string matches the format. If it doesn't return null
const matches = dateStr.match(new RegExp(newFormat, "i"));
if (!matches) {
return null;
}
const combinedI18nSettings: I18nSettings = assign(
assign({}, globalI18n),
i18n
);
// For each match, call the parser function for that date part
for (let i = 1; i < matches.length; i++) {
const [field, , parser] = parseInfo[i - 1];
const value = parser
? parser(matches[i], combinedI18nSettings)
: +matches[i];
// If the parser can't make sense of the value, return null
if (value == null) {
return null;
}
dateInfo[field] = value;
}
if (dateInfo.isPm === 1 && dateInfo.hour != null && +dateInfo.hour !== 12) {
dateInfo.hour = +dateInfo.hour + 12;
} else if (dateInfo.isPm === 0 && +dateInfo.hour === 12) {
dateInfo.hour = 0;
}
let dateTZ: Date;
if (dateInfo.timezoneOffset == null) {
dateTZ = new Date(
dateInfo.year,
dateInfo.month,
dateInfo.day,
dateInfo.hour,
dateInfo.minute,
dateInfo.second,
dateInfo.millisecond
);
const validateFields: [
"month" | "day" | "hour" | "minute" | "second",
"getMonth" | "getDate" | "getHours" | "getMinutes" | "getSeconds"
][] = [
["month", "getMonth"],
["day", "getDate"],
["hour", "getHours"],
["minute", "getMinutes"],
["second", "getSeconds"]
];
for (let i = 0, len = validateFields.length; i < len; i++) {
// Check to make sure the date field is within the allowed range. Javascript dates allows values
// outside the allowed range. If the values don't match the value was invalid
if (
specifiedFields[validateFields[i][0]] &&
dateInfo[validateFields[i][0]] !== dateTZ[validateFields[i][1]]()
) {
return null;
}
}
} else {
dateTZ = new Date(
Date.UTC(
dateInfo.year,
dateInfo.month,
dateInfo.day,
dateInfo.hour,
dateInfo.minute - dateInfo.timezoneOffset,
dateInfo.second,
dateInfo.millisecond
)
);
// We can't validate dates in another timezone unfortunately. Do a basic check instead
if (
dateInfo.month > 11 ||
dateInfo.month < 0 ||
dateInfo.day > 31 ||
dateInfo.day < 1 ||
dateInfo.hour > 23 ||
dateInfo.hour < 0 ||
dateInfo.minute > 59 ||
dateInfo.minute < 0 ||
dateInfo.second > 59 ||
dateInfo.second < 0
) {
return null;
}
}
// Don't allow invalid dates
return dateTZ;
}
export default {
format,
parse,
defaultI18n,
setGlobalDateI18n,
setGlobalDateMasks
};
export { format, parse, defaultI18n, setGlobalDateI18n, setGlobalDateMasks };