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index.js
469 lines (446 loc) · 26.5 KB
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index.js
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import isValid from '../isValid/index.js'
import defaultLocale from '../locale/en-US/index.js'
import subMilliseconds from '../subMilliseconds/index.js'
import toDate from '../toDate/index.js'
import formatters from '../_lib/format/formatters/index.js'
import longFormatters from '../_lib/format/longFormatters/index.js'
import getTimezoneOffsetInMilliseconds from '../_lib/getTimezoneOffsetInMilliseconds/index.js'
import {
isProtectedDayOfYearToken,
isProtectedWeekYearToken,
throwProtectedError
} from '../_lib/protectedTokens/index.js'
import toInteger from '../_lib/toInteger/index.js'
import requiredArgs from '../_lib/requiredArgs/index.js'
// This RegExp consists of three parts separated by `|`:
// - [yYQqMLwIdDecihHKkms]o matches any available ordinal number token
// (one of the certain letters followed by `o`)
// - (\w)\1* matches any sequences of the same letter
// - '' matches two quote characters in a row
// - '(''|[^'])+('|$) matches anything surrounded by two quote characters ('),
// except a single quote symbol, which ends the sequence.
// Two quote characters do not end the sequence.
// If there is no matching single quote
// then the sequence will continue until the end of the string.
// - . matches any single character unmatched by previous parts of the RegExps
var formattingTokensRegExp = /[yYQqMLwIdDecihHKkms]o|(\w)\1*|''|'(''|[^'])+('|$)|./g
// This RegExp catches symbols escaped by quotes, and also
// sequences of symbols P, p, and the combinations like `PPPPPPPppppp`
var longFormattingTokensRegExp = /P+p+|P+|p+|''|'(''|[^'])+('|$)|./g
var escapedStringRegExp = /^'([^]*?)'?$/
var doubleQuoteRegExp = /''/g
var unescapedLatinCharacterRegExp = /[a-zA-Z]/
/**
* @name format
* @category Common Helpers
* @summary Format the date.
*
* @description
* Return the formatted date string in the given format. The result may vary by locale.
*
* > ⚠️ Please note that the `format` tokens differ from Moment.js and other libraries.
* > See: https://git.io/fxCyr
*
* The characters wrapped between two single quotes characters (') are escaped.
* Two single quotes in a row, whether inside or outside a quoted sequence, represent a 'real' single quote.
* (see the last example)
*
* Format of the string is based on Unicode Technical Standard #35:
* https://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
* with a few additions (see note 7 below the table).
*
* Accepted patterns:
* | Unit | Pattern | Result examples | Notes |
* |---------------------------------|---------|-----------------------------------|-------|
* | Era | G..GGG | AD, BC | |
* | | GGGG | Anno Domini, Before Christ | 2 |
* | | GGGGG | A, B | |
* | Calendar year | y | 44, 1, 1900, 2017 | 5 |
* | | yo | 44th, 1st, 0th, 17th | 5,7 |
* | | yy | 44, 01, 00, 17 | 5 |
* | | yyy | 044, 001, 1900, 2017 | 5 |
* | | yyyy | 0044, 0001, 1900, 2017 | 5 |
* | | yyyyy | ... | 3,5 |
* | Local week-numbering year | Y | 44, 1, 1900, 2017 | 5 |
* | | Yo | 44th, 1st, 1900th, 2017th | 5,7 |
* | | YY | 44, 01, 00, 17 | 5,8 |
* | | YYY | 044, 001, 1900, 2017 | 5 |
* | | YYYY | 0044, 0001, 1900, 2017 | 5,8 |
* | | YYYYY | ... | 3,5 |
* | ISO week-numbering year | R | -43, 0, 1, 1900, 2017 | 5,7 |
* | | RR | -43, 00, 01, 1900, 2017 | 5,7 |
* | | RRR | -043, 000, 001, 1900, 2017 | 5,7 |
* | | RRRR | -0043, 0000, 0001, 1900, 2017 | 5,7 |
* | | RRRRR | ... | 3,5,7 |
* | Extended year | u | -43, 0, 1, 1900, 2017 | 5 |
* | | uu | -43, 01, 1900, 2017 | 5 |
* | | uuu | -043, 001, 1900, 2017 | 5 |
* | | uuuu | -0043, 0001, 1900, 2017 | 5 |
* | | uuuuu | ... | 3,5 |
* | Quarter (formatting) | Q | 1, 2, 3, 4 | |
* | | Qo | 1st, 2nd, 3rd, 4th | 7 |
* | | QQ | 01, 02, 03, 04 | |
* | | QQQ | Q1, Q2, Q3, Q4 | |
* | | QQQQ | 1st quarter, 2nd quarter, ... | 2 |
* | | QQQQQ | 1, 2, 3, 4 | 4 |
* | Quarter (stand-alone) | q | 1, 2, 3, 4 | |
* | | qo | 1st, 2nd, 3rd, 4th | 7 |
* | | qq | 01, 02, 03, 04 | |
* | | qqq | Q1, Q2, Q3, Q4 | |
* | | qqqq | 1st quarter, 2nd quarter, ... | 2 |
* | | qqqqq | 1, 2, 3, 4 | 4 |
* | Month (formatting) | M | 1, 2, ..., 12 | |
* | | Mo | 1st, 2nd, ..., 12th | 7 |
* | | MM | 01, 02, ..., 12 | |
* | | MMM | Jan, Feb, ..., Dec | |
* | | MMMM | January, February, ..., December | 2 |
* | | MMMMM | J, F, ..., D | |
* | Month (stand-alone) | L | 1, 2, ..., 12 | |
* | | Lo | 1st, 2nd, ..., 12th | 7 |
* | | LL | 01, 02, ..., 12 | |
* | | LLL | Jan, Feb, ..., Dec | |
* | | LLLL | January, February, ..., December | 2 |
* | | LLLLL | J, F, ..., D | |
* | Local week of year | w | 1, 2, ..., 53 | |
* | | wo | 1st, 2nd, ..., 53th | 7 |
* | | ww | 01, 02, ..., 53 | |
* | ISO week of year | I | 1, 2, ..., 53 | 7 |
* | | Io | 1st, 2nd, ..., 53th | 7 |
* | | II | 01, 02, ..., 53 | 7 |
* | Day of month | d | 1, 2, ..., 31 | |
* | | do | 1st, 2nd, ..., 31st | 7 |
* | | dd | 01, 02, ..., 31 | |
* | Day of year | D | 1, 2, ..., 365, 366 | 9 |
* | | Do | 1st, 2nd, ..., 365th, 366th | 7 |
* | | DD | 01, 02, ..., 365, 366 | 9 |
* | | DDD | 001, 002, ..., 365, 366 | |
* | | DDDD | ... | 3 |
* | Day of week (formatting) | E..EEE | Mon, Tue, Wed, ..., Su | |
* | | EEEE | Monday, Tuesday, ..., Sunday | 2 |
* | | EEEEE | M, T, W, T, F, S, S | |
* | | EEEEEE | Mo, Tu, We, Th, Fr, Su, Sa | |
* | ISO day of week (formatting) | i | 1, 2, 3, ..., 7 | 7 |
* | | io | 1st, 2nd, ..., 7th | 7 |
* | | ii | 01, 02, ..., 07 | 7 |
* | | iii | Mon, Tue, Wed, ..., Su | 7 |
* | | iiii | Monday, Tuesday, ..., Sunday | 2,7 |
* | | iiiii | M, T, W, T, F, S, S | 7 |
* | | iiiiii | Mo, Tu, We, Th, Fr, Su, Sa | 7 |
* | Local day of week (formatting) | e | 2, 3, 4, ..., 1 | |
* | | eo | 2nd, 3rd, ..., 1st | 7 |
* | | ee | 02, 03, ..., 01 | |
* | | eee | Mon, Tue, Wed, ..., Su | |
* | | eeee | Monday, Tuesday, ..., Sunday | 2 |
* | | eeeee | M, T, W, T, F, S, S | |
* | | eeeeee | Mo, Tu, We, Th, Fr, Su, Sa | |
* | Local day of week (stand-alone) | c | 2, 3, 4, ..., 1 | |
* | | co | 2nd, 3rd, ..., 1st | 7 |
* | | cc | 02, 03, ..., 01 | |
* | | ccc | Mon, Tue, Wed, ..., Su | |
* | | cccc | Monday, Tuesday, ..., Sunday | 2 |
* | | ccccc | M, T, W, T, F, S, S | |
* | | cccccc | Mo, Tu, We, Th, Fr, Su, Sa | |
* | AM, PM | a..aaa | AM, PM | |
* | | aaaa | a.m., p.m. | 2 |
* | | aaaaa | a, p | |
* | AM, PM, noon, midnight | b..bbb | AM, PM, noon, midnight | |
* | | bbbb | a.m., p.m., noon, midnight | 2 |
* | | bbbbb | a, p, n, mi | |
* | Flexible day period | B..BBB | at night, in the morning, ... | |
* | | BBBB | at night, in the morning, ... | 2 |
* | | BBBBB | at night, in the morning, ... | |
* | Hour [1-12] | h | 1, 2, ..., 11, 12 | |
* | | ho | 1st, 2nd, ..., 11th, 12th | 7 |
* | | hh | 01, 02, ..., 11, 12 | |
* | Hour [0-23] | H | 0, 1, 2, ..., 23 | |
* | | Ho | 0th, 1st, 2nd, ..., 23rd | 7 |
* | | HH | 00, 01, 02, ..., 23 | |
* | Hour [0-11] | K | 1, 2, ..., 11, 0 | |
* | | Ko | 1st, 2nd, ..., 11th, 0th | 7 |
* | | KK | 1, 2, ..., 11, 0 | |
* | Hour [1-24] | k | 24, 1, 2, ..., 23 | |
* | | ko | 24th, 1st, 2nd, ..., 23rd | 7 |
* | | kk | 24, 01, 02, ..., 23 | |
* | Minute | m | 0, 1, ..., 59 | |
* | | mo | 0th, 1st, ..., 59th | 7 |
* | | mm | 00, 01, ..., 59 | |
* | Second | s | 0, 1, ..., 59 | |
* | | so | 0th, 1st, ..., 59th | 7 |
* | | ss | 00, 01, ..., 59 | |
* | Fraction of second | S | 0, 1, ..., 9 | |
* | | SS | 00, 01, ..., 99 | |
* | | SSS | 000, 0001, ..., 999 | |
* | | SSSS | ... | 3 |
* | Timezone (ISO-8601 w/ Z) | X | -08, +0530, Z | |
* | | XX | -0800, +0530, Z | |
* | | XXX | -08:00, +05:30, Z | |
* | | XXXX | -0800, +0530, Z, +123456 | 2 |
* | | XXXXX | -08:00, +05:30, Z, +12:34:56 | |
* | Timezone (ISO-8601 w/o Z) | x | -08, +0530, +00 | |
* | | xx | -0800, +0530, +0000 | |
* | | xxx | -08:00, +05:30, +00:00 | 2 |
* | | xxxx | -0800, +0530, +0000, +123456 | |
* | | xxxxx | -08:00, +05:30, +00:00, +12:34:56 | |
* | Timezone (GMT) | O...OOO | GMT-8, GMT+5:30, GMT+0 | |
* | | OOOO | GMT-08:00, GMT+05:30, GMT+00:00 | 2 |
* | Timezone (specific non-locat.) | z...zzz | GMT-8, GMT+5:30, GMT+0 | 6 |
* | | zzzz | GMT-08:00, GMT+05:30, GMT+00:00 | 2,6 |
* | Seconds timestamp | t | 512969520 | 7 |
* | | tt | ... | 3,7 |
* | Milliseconds timestamp | T | 512969520900 | 7 |
* | | TT | ... | 3,7 |
* | Long localized date | P | 05/29/1453 | 7 |
* | | PP | May 29, 1453 | 7 |
* | | PPP | May 29th, 1453 | 7 |
* | | PPPP | Sunday, May 29th, 1453 | 2,7 |
* | Long localized time | p | 12:00 AM | 7 |
* | | pp | 12:00:00 AM | 7 |
* | | ppp | 12:00:00 AM GMT+2 | 7 |
* | | pppp | 12:00:00 AM GMT+02:00 | 2,7 |
* | Combination of date and time | Pp | 05/29/1453, 12:00 AM | 7 |
* | | PPpp | May 29, 1453, 12:00:00 AM | 7 |
* | | PPPppp | May 29th, 1453 at ... | 7 |
* | | PPPPpppp| Sunday, May 29th, 1453 at ... | 2,7 |
* Notes:
* 1. "Formatting" units (e.g. formatting quarter) in the default en-US locale
* are the same as "stand-alone" units, but are different in some languages.
* "Formatting" units are declined according to the rules of the language
* in the context of a date. "Stand-alone" units are always nominative singular:
*
* `format(new Date(2017, 10, 6), 'do LLLL', {locale: cs}) //=> '6. listopad'`
*
* `format(new Date(2017, 10, 6), 'do MMMM', {locale: cs}) //=> '6. listopadu'`
*
* 2. Any sequence of the identical letters is a pattern, unless it is escaped by
* the single quote characters (see below).
* If the sequence is longer than listed in table (e.g. `EEEEEEEEEEE`)
* the output will be the same as default pattern for this unit, usually
* the longest one (in case of ISO weekdays, `EEEE`). Default patterns for units
* are marked with "2" in the last column of the table.
*
* `format(new Date(2017, 10, 6), 'MMM') //=> 'Nov'`
*
* `format(new Date(2017, 10, 6), 'MMMM') //=> 'November'`
*
* `format(new Date(2017, 10, 6), 'MMMMM') //=> 'N'`
*
* `format(new Date(2017, 10, 6), 'MMMMMM') //=> 'November'`
*
* `format(new Date(2017, 10, 6), 'MMMMMMM') //=> 'November'`
*
* 3. Some patterns could be unlimited length (such as `yyyyyyyy`).
* The output will be padded with zeros to match the length of the pattern.
*
* `format(new Date(2017, 10, 6), 'yyyyyyyy') //=> '00002017'`
*
* 4. `QQQQQ` and `qqqqq` could be not strictly numerical in some locales.
* These tokens represent the shortest form of the quarter.
*
* 5. The main difference between `y` and `u` patterns are B.C. years:
*
* | Year | `y` | `u` |
* |------|-----|-----|
* | AC 1 | 1 | 1 |
* | BC 1 | 1 | 0 |
* | BC 2 | 2 | -1 |
*
* Also `yy` always returns the last two digits of a year,
* while `uu` pads single digit years to 2 characters and returns other years unchanged:
*
* | Year | `yy` | `uu` |
* |------|------|------|
* | 1 | 01 | 01 |
* | 14 | 14 | 14 |
* | 376 | 76 | 376 |
* | 1453 | 53 | 1453 |
*
* The same difference is true for local and ISO week-numbering years (`Y` and `R`),
* except local week-numbering years are dependent on `options.weekStartsOn`
* and `options.firstWeekContainsDate` (compare [getISOWeekYear]{@link https://date-fns.org/docs/getISOWeekYear}
* and [getWeekYear]{@link https://date-fns.org/docs/getWeekYear}).
*
* 6. Specific non-location timezones are currently unavailable in `date-fns`,
* so right now these tokens fall back to GMT timezones.
*
* 7. These patterns are not in the Unicode Technical Standard #35:
* - `i`: ISO day of week
* - `I`: ISO week of year
* - `R`: ISO week-numbering year
* - `t`: seconds timestamp
* - `T`: milliseconds timestamp
* - `o`: ordinal number modifier
* - `P`: long localized date
* - `p`: long localized time
*
* 8. `YY` and `YYYY` tokens represent week-numbering years but they are often confused with years.
* You should enable `options.useAdditionalWeekYearTokens` to use them. See: https://git.io/fxCyr
*
* 9. `D` and `DD` tokens represent days of the year but they are ofthen confused with days of the month.
* You should enable `options.useAdditionalDayOfYearTokens` to use them. See: https://git.io/fxCyr
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* - The second argument is now required for the sake of explicitness.
*
* ```javascript
* // Before v2.0.0
* format(new Date(2016, 0, 1))
*
* // v2.0.0 onward
* format(new Date(2016, 0, 1), "yyyy-MM-dd'T'HH:mm:ss.SSSxxx")
* ```
*
* - New format string API for `format` function
* which is based on [Unicode Technical Standard #35](https://www.unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table).
* See [this post](https://blog.date-fns.org/post/unicode-tokens-in-date-fns-v2-sreatyki91jg) for more details.
*
* - Characters are now escaped using single quote symbols (`'`) instead of square brackets.
*
* @param {Date|Number} date - the original date
* @param {String} format - the string of tokens
* @param {Object} [options] - an object with options.
* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
* @param {Number} [options.firstWeekContainsDate=1] - the day of January, which is
* @param {Boolean} [options.useAdditionalWeekYearTokens=false] - if true, allows usage of the week-numbering year tokens `YY` and `YYYY`;
* see: https://git.io/fxCyr
* @param {Boolean} [options.useAdditionalDayOfYearTokens=false] - if true, allows usage of the day of year tokens `D` and `DD`;
* see: https://git.io/fxCyr
* @returns {String} the formatted date string
* @throws {TypeError} 2 arguments required
* @throws {RangeError} `date` must not be Invalid Date
* @throws {RangeError} `options.locale` must contain `localize` property
* @throws {RangeError} `options.locale` must contain `formatLong` property
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
* @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
* @throws {RangeError} use `yyyy` instead of `YYYY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
* @throws {RangeError} use `yy` instead of `YY` for formatting years using [format provided] to the input [input provided]; see: https://git.io/fxCyr
* @throws {RangeError} use `d` instead of `D` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
* @throws {RangeError} use `dd` instead of `DD` for formatting days of the month using [format provided] to the input [input provided]; see: https://git.io/fxCyr
* @throws {RangeError} format string contains an unescaped latin alphabet character
*
* @example
* // Represent 11 February 2014 in middle-endian format:
* var result = format(new Date(2014, 1, 11), 'MM/dd/yyyy')
* //=> '02/11/2014'
*
* @example
* // Represent 2 July 2014 in Esperanto:
* import { eoLocale } from 'date-fns/locale/eo'
* var result = format(new Date(2014, 6, 2), "do 'de' MMMM yyyy", {
* locale: eoLocale
* })
* //=> '2-a de julio 2014'
*
* @example
* // Escape string by single quote characters:
* var result = format(new Date(2014, 6, 2, 15), "h 'o''clock'")
* //=> "3 o'clock"
*/
export default function format(dirtyDate, dirtyFormatStr, dirtyOptions) {
requiredArgs(2, arguments)
var formatStr = String(dirtyFormatStr)
var options = dirtyOptions || {}
var locale = options.locale || defaultLocale
var localeFirstWeekContainsDate =
locale.options && locale.options.firstWeekContainsDate
var defaultFirstWeekContainsDate =
localeFirstWeekContainsDate == null
? 1
: toInteger(localeFirstWeekContainsDate)
var firstWeekContainsDate =
options.firstWeekContainsDate == null
? defaultFirstWeekContainsDate
: toInteger(options.firstWeekContainsDate)
// Test if weekStartsOn is between 1 and 7 _and_ is not NaN
if (!(firstWeekContainsDate >= 1 && firstWeekContainsDate <= 7)) {
throw new RangeError(
'firstWeekContainsDate must be between 1 and 7 inclusively'
)
}
var localeWeekStartsOn = locale.options && locale.options.weekStartsOn
var defaultWeekStartsOn =
localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn)
var weekStartsOn =
options.weekStartsOn == null
? defaultWeekStartsOn
: toInteger(options.weekStartsOn)
// Test if weekStartsOn is between 0 and 6 _and_ is not NaN
if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
throw new RangeError('weekStartsOn must be between 0 and 6 inclusively')
}
if (!locale.localize) {
throw new RangeError('locale must contain localize property')
}
if (!locale.formatLong) {
throw new RangeError('locale must contain formatLong property')
}
var originalDate = toDate(dirtyDate)
if (!isValid(originalDate)) {
throw new RangeError('Invalid time value')
}
// Convert the date in system timezone to the same date in UTC+00:00 timezone.
// This ensures that when UTC functions will be implemented, locales will be compatible with them.
// See an issue about UTC functions: https://github.com/date-fns/date-fns/issues/376
var timezoneOffset = getTimezoneOffsetInMilliseconds(originalDate)
var utcDate = subMilliseconds(originalDate, timezoneOffset)
var formatterOptions = {
firstWeekContainsDate: firstWeekContainsDate,
weekStartsOn: weekStartsOn,
locale: locale,
_originalDate: originalDate
}
var result = formatStr
.match(longFormattingTokensRegExp)
.map(function(substring) {
var firstCharacter = substring[0]
if (firstCharacter === 'p' || firstCharacter === 'P') {
var longFormatter = longFormatters[firstCharacter]
return longFormatter(substring, locale.formatLong, formatterOptions)
}
return substring
})
.join('')
.match(formattingTokensRegExp)
.map(function(substring) {
// Replace two single quote characters with one single quote character
if (substring === "''") {
return "'"
}
var firstCharacter = substring[0]
if (firstCharacter === "'") {
return cleanEscapedString(substring)
}
var formatter = formatters[firstCharacter]
if (formatter) {
if (
!options.useAdditionalWeekYearTokens &&
isProtectedWeekYearToken(substring)
) {
throwProtectedError(substring, dirtyFormatStr, dirtyDate)
}
if (
!options.useAdditionalDayOfYearTokens &&
isProtectedDayOfYearToken(substring)
) {
throwProtectedError(substring, dirtyFormatStr, dirtyDate)
}
return formatter(utcDate, substring, locale.localize, formatterOptions)
}
if (firstCharacter.match(unescapedLatinCharacterRegExp)) {
throw new RangeError(
'Format string contains an unescaped latin alphabet character `' +
firstCharacter +
'`'
)
}
return substring
})
.join('')
return result
}
function cleanEscapedString(input) {
return input.match(escapedStringRegExp)[1].replace(doubleQuoteRegExp, "'")
}