forked from date-fns/date-fns
/
index.js
624 lines (583 loc) · 30.9 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
import defaultLocale from '../locale/en-US/index.js'
import subMilliseconds from '../subMilliseconds/index.js'
import toDate from '../toDate/index.js'
import assign from '../_lib/assign/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 parsers from './_lib/parsers/index.js'
var TIMEZONE_UNIT_PRIORITY = 10
// 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 notWhitespaceRegExp = /\S/
var unescapedLatinCharacterRegExp = /[a-zA-Z]/
/**
* @name parse
* @category Common Helpers
* @summary Parse the date.
*
* @description
* Return the date parsed from string using the given format string.
*
* > ⚠️ Please note that the `format` tokens differ from Moment.js and other libraries.
* > See: https://git.io/fxCyr
*
* The characters in the format string 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.
*
* Format of the format 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 5 below the table).
*
* Not all tokens are compatible. Combinations that don't make sense or could lead to bugs are prohibited
* and will throw `RangeError`. For example usage of 24-hour format token with AM/PM token will throw an exception:
*
* ```javascript
* parse('23 AM', 'HH a', new Date())
* //=> RangeError: The format string mustn't contain `HH` and `a` at the same time
* ```
*
* See the compatibility table: https://docs.google.com/spreadsheets/d/e/2PACX-1vQOPU3xUhplll6dyoMmVUXHKl_8CRDs6_ueLmex3SoqwhuolkuN3O05l4rqx5h1dKX8eb46Ul-CCSrq/pubhtml?gid=0&single=true
*
* Accepted format string patterns:
* | Unit |Prior| Pattern | Result examples | Notes |
* |---------------------------------|-----|---------|-----------------------------------|-------|
* | Era | 140 | G..GGG | AD, BC | |
* | | | GGGG | Anno Domini, Before Christ | 2 |
* | | | GGGGG | A, B | |
* | Calendar year | 130 | y | 44, 1, 1900, 2017, 9999 | 4 |
* | | | yo | 44th, 1st, 1900th, 9999999th | 4,5 |
* | | | yy | 44, 01, 00, 17 | 4 |
* | | | yyy | 044, 001, 123, 999 | 4 |
* | | | yyyy | 0044, 0001, 1900, 2017 | 4 |
* | | | yyyyy | ... | 2,4 |
* | Local week-numbering year | 130 | Y | 44, 1, 1900, 2017, 9000 | 4 |
* | | | Yo | 44th, 1st, 1900th, 9999999th | 4,5 |
* | | | YY | 44, 01, 00, 17 | 4,6 |
* | | | YYY | 044, 001, 123, 999 | 4 |
* | | | YYYY | 0044, 0001, 1900, 2017 | 4,6 |
* | | | YYYYY | ... | 2,4 |
* | ISO week-numbering year | 130 | R | -43, 1, 1900, 2017, 9999, -9999 | 4,5 |
* | | | RR | -43, 01, 00, 17 | 4,5 |
* | | | RRR | -043, 001, 123, 999, -999 | 4,5 |
* | | | RRRR | -0043, 0001, 2017, 9999, -9999 | 4,5 |
* | | | RRRRR | ... | 2,4,5 |
* | Extended year | 130 | u | -43, 1, 1900, 2017, 9999, -999 | 4 |
* | | | uu | -43, 01, 99, -99 | 4 |
* | | | uuu | -043, 001, 123, 999, -999 | 4 |
* | | | uuuu | -0043, 0001, 2017, 9999, -9999 | 4 |
* | | | uuuuu | ... | 2,4 |
* | Quarter (formatting) | 120 | Q | 1, 2, 3, 4 | |
* | | | Qo | 1st, 2nd, 3rd, 4th | 5 |
* | | | 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) | 120 | q | 1, 2, 3, 4 | |
* | | | qo | 1st, 2nd, 3rd, 4th | 5 |
* | | | qq | 01, 02, 03, 04 | |
* | | | qqq | Q1, Q2, Q3, Q4 | |
* | | | qqqq | 1st quarter, 2nd quarter, ... | 2 |
* | | | qqqqq | 1, 2, 3, 4 | 3 |
* | Month (formatting) | 110 | M | 1, 2, ..., 12 | |
* | | | Mo | 1st, 2nd, ..., 12th | 5 |
* | | | MM | 01, 02, ..., 12 | |
* | | | MMM | Jan, Feb, ..., Dec | |
* | | | MMMM | January, February, ..., December | 2 |
* | | | MMMMM | J, F, ..., D | |
* | Month (stand-alone) | 110 | L | 1, 2, ..., 12 | |
* | | | Lo | 1st, 2nd, ..., 12th | 5 |
* | | | LL | 01, 02, ..., 12 | |
* | | | LLL | Jan, Feb, ..., Dec | |
* | | | LLLL | January, February, ..., December | 2 |
* | | | LLLLL | J, F, ..., D | |
* | Local week of year | 100 | w | 1, 2, ..., 53 | |
* | | | wo | 1st, 2nd, ..., 53th | 5 |
* | | | ww | 01, 02, ..., 53 | |
* | ISO week of year | 100 | I | 1, 2, ..., 53 | 5 |
* | | | Io | 1st, 2nd, ..., 53th | 5 |
* | | | II | 01, 02, ..., 53 | 5 |
* | Day of month | 90 | d | 1, 2, ..., 31 | |
* | | | do | 1st, 2nd, ..., 31st | 5 |
* | | | dd | 01, 02, ..., 31 | |
* | Day of year | 90 | D | 1, 2, ..., 365, 366 | 7 |
* | | | Do | 1st, 2nd, ..., 365th, 366th | 5 |
* | | | DD | 01, 02, ..., 365, 366 | 7 |
* | | | DDD | 001, 002, ..., 365, 366 | |
* | | | DDDD | ... | 2 |
* | Day of week (formatting) | 90 | 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) | 90 | i | 1, 2, 3, ..., 7 | 5 |
* | | | io | 1st, 2nd, ..., 7th | 5 |
* | | | ii | 01, 02, ..., 07 | 5 |
* | | | iii | Mon, Tue, Wed, ..., Su | 5 |
* | | | iiii | Monday, Tuesday, ..., Sunday | 2,5 |
* | | | iiiii | M, T, W, T, F, S, S | 5 |
* | | | iiiiii | Mo, Tu, We, Th, Fr, Su, Sa | 5 |
* | Local day of week (formatting) | 90 | e | 2, 3, 4, ..., 1 | |
* | | | eo | 2nd, 3rd, ..., 1st | 5 |
* | | | 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) | 90 | c | 2, 3, 4, ..., 1 | |
* | | | co | 2nd, 3rd, ..., 1st | 5 |
* | | | 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 | 80 | a..aaa | AM, PM | |
* | | | aaaa | a.m., p.m. | 2 |
* | | | aaaaa | a, p | |
* | AM, PM, noon, midnight | 80 | b..bbb | AM, PM, noon, midnight | |
* | | | bbbb | a.m., p.m., noon, midnight | 2 |
* | | | bbbbb | a, p, n, mi | |
* | Flexible day period | 80 | B..BBB | at night, in the morning, ... | |
* | | | BBBB | at night, in the morning, ... | 2 |
* | | | BBBBB | at night, in the morning, ... | |
* | Hour [1-12] | 70 | h | 1, 2, ..., 11, 12 | |
* | | | ho | 1st, 2nd, ..., 11th, 12th | 5 |
* | | | hh | 01, 02, ..., 11, 12 | |
* | Hour [0-23] | 70 | H | 0, 1, 2, ..., 23 | |
* | | | Ho | 0th, 1st, 2nd, ..., 23rd | 5 |
* | | | HH | 00, 01, 02, ..., 23 | |
* | Hour [0-11] | 70 | K | 1, 2, ..., 11, 0 | |
* | | | Ko | 1st, 2nd, ..., 11th, 0th | 5 |
* | | | KK | 1, 2, ..., 11, 0 | |
* | Hour [1-24] | 70 | k | 24, 1, 2, ..., 23 | |
* | | | ko | 24th, 1st, 2nd, ..., 23rd | 5 |
* | | | kk | 24, 01, 02, ..., 23 | |
* | Minute | 60 | m | 0, 1, ..., 59 | |
* | | | mo | 0th, 1st, ..., 59th | 5 |
* | | | mm | 00, 01, ..., 59 | |
* | Second | 50 | s | 0, 1, ..., 59 | |
* | | | so | 0th, 1st, ..., 59th | 5 |
* | | | ss | 00, 01, ..., 59 | |
* | Seconds timestamp | 40 | t | 512969520 | |
* | | | tt | ... | 2 |
* | Fraction of second | 30 | S | 0, 1, ..., 9 | |
* | | | SS | 00, 01, ..., 99 | |
* | | | SSS | 000, 0001, ..., 999 | |
* | | | SSSS | ... | 2 |
* | Milliseconds timestamp | 20 | T | 512969520900 | |
* | | | TT | ... | 2 |
* | Timezone (ISO-8601 w/ Z) | 10 | 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) | 10 | 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 | |
* | Long localized date | NA | P | 05/29/1453 | 5,8 |
* | | | PP | May 29, 1453 | |
* | | | PPP | May 29th, 1453 | |
* | | | PPPP | Sunday, May 29th, 1453 | 2,5,8 |
* | Long localized time | NA | p | 12:00 AM | 5,8 |
* | | | pp | 12:00:00 AM | |
* | Combination of date and time | NA | Pp | 05/29/1453, 12:00 AM | |
* | | | PPpp | May 29, 1453, 12:00:00 AM | |
* | | | PPPpp | May 29th, 1453 at ... | |
* | | | PPPPpp | Sunday, May 29th, 1453 at ... | 2,5,8 |
* 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.
* In `format` function, they will produce different result:
*
* `format(new Date(2017, 10, 6), 'do LLLL', {locale: cs}) //=> '6. listopad'`
*
* `format(new Date(2017, 10, 6), 'do MMMM', {locale: cs}) //=> '6. listopadu'`
*
* `parse` will try to match both formatting and stand-alone units interchangably.
*
* 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:
* - for numerical units (`yyyyyyyy`) `parse` will try to match a number
* as wide as the sequence
* - for text units (`MMMMMMMM`) `parse` will try to match the widest variation of the unit.
* These variations are marked with "2" in the last column of the table.
*
* 3. `QQQQQ` and `qqqqq` could be not strictly numerical in some locales.
* These tokens represent the shortest form of the quarter.
*
* 4. 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` will try to guess the century of two digit year by proximity with `backupDate`:
*
* `parse('50', 'yy', new Date(2018, 0, 1)) //=> Sat Jan 01 2050 00:00:00`
*
* `parse('75', 'yy', new Date(2018, 0, 1)) //=> Wed Jan 01 1975 00:00:00`
*
* while `uu` will just assign the year as is:
*
* `parse('50', 'uu', new Date(2018, 0, 1)) //=> Sat Jan 01 0050 00:00:00`
*
* `parse('75', 'uu', new Date(2018, 0, 1)) //=> Tue Jan 01 0075 00:00:00`
*
* 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 [setISOWeekYear]{@link https://date-fns.org/docs/setISOWeekYear}
* and [setWeekYear]{@link https://date-fns.org/docs/setWeekYear}).
*
* 5. 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
* - `o`: ordinal number modifier
* - `P`: long localized date
* - `p`: long localized time
*
* 6. `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
*
* 7. `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
*
* 8. `P+` tokens do not have a defined priority since they are merely aliases to other tokens based
* on the given locale.
*
* using `en-US` locale: `P` => `MM/dd/yyyy`
* using `en-US` locale: `p` => `hh:mm a`
* using `pt-BR` locale: `P` => `dd/MM/yyyy`
* using `pt-BR` locale: `p` => `HH:mm`
*
* Values will be assigned to the date in the descending order of its unit's priority.
* Units of an equal priority overwrite each other in the order of appearance.
*
* If no values of higher priority are parsed (e.g. when parsing string 'January 1st' without a year),
* the values will be taken from 3rd argument `backupDate` which works as a context of parsing.
*
* `backupDate` must be passed for correct work of the function.
* If you're not sure which `backupDate` to supply, create a new instance of Date:
* `parse('02/11/2014', 'MM/dd/yyyy', new Date())`
* In this case parsing will be done in the context of the current date.
* If `backupDate` is `Invalid Date` or a value not convertible to valid `Date`,
* then `Invalid Date` will be returned.
*
* The result may vary by locale.
*
* If `formatString` matches with `dateString` but does not provides tokens, `backupDate` will be returned.
*
* If parsing failed, `Invalid Date` will be returned.
* Invalid Date is a Date, whose time value is NaN.
* Time value of Date: http://es5.github.io/#x15.9.1.1
*
* ### 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).
*
* - Old `parse` was renamed to `toDate`.
* Now `parse` is a new function which parses a string using a provided format.
*
* ```javascript
* // Before v2.0.0
* parse('2016-01-01')
*
* // v2.0.0 onward
* toDate('2016-01-01')
* parse('2016-01-01', 'yyyy-MM-dd', new Date())
* ```
*
* @param {String} dateString - the string to parse
* @param {String} formatString - the string of tokens
* @param {Date|Number} backupDate - defines values missing from the parsed dateString
* @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 {1|2|3|4|5|6|7} [options.firstWeekContainsDate=1] - the day of January, which is always in the first week of the year
* @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 {Date} the parsed date
* @throws {TypeError} 3 arguments required
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
* @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
* @throws {RangeError} `options.locale` must contain `match` property
* @throws {RangeError} use `yyyy` instead of `YYYY` for formatting years; see: https://git.io/fxCyr
* @throws {RangeError} use `yy` instead of `YY` for formatting years; see: https://git.io/fxCyr
* @throws {RangeError} use `d` instead of `D` for formatting days of the month; see: https://git.io/fxCyr
* @throws {RangeError} use `dd` instead of `DD` for formatting days of the month; see: https://git.io/fxCyr
* @throws {RangeError} format string contains an unescaped latin alphabet character
*
* @example
* // Parse 11 February 2014 from middle-endian format:
* var result = parse('02/11/2014', 'MM/dd/yyyy', new Date())
* //=> Tue Feb 11 2014 00:00:00
*
* @example
* // Parse 28th of February in Esperanto locale in the context of 2010 year:
* import eo from 'date-fns/locale/eo'
* var result = parse('28-a de februaro', "do 'de' MMMM", new Date(2010, 0, 1), {
* locale: eo
* })
* //=> Sun Feb 28 2010 00:00:00
*/
export default function parse(
dirtyDateString,
dirtyFormatString,
dirtyBackupDate,
dirtyOptions
) {
if (arguments.length < 3) {
throw new TypeError(
'3 arguments required, but only ' + arguments.length + ' present'
)
}
var dateString = String(dirtyDateString)
var formatString = String(dirtyFormatString)
var options = dirtyOptions || {}
var locale = options.locale || defaultLocale
if (!locale.match) {
throw new RangeError('locale must contain match property')
}
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 (formatString === '') {
if (dateString === '') {
return toDate(dirtyBackupDate)
} else {
return new Date(NaN)
}
}
var subFnOptions = {
firstWeekContainsDate: firstWeekContainsDate,
weekStartsOn: weekStartsOn,
locale: locale
}
// If timezone isn't specified, it will be set to the system timezone
var setters = [
{
priority: TIMEZONE_UNIT_PRIORITY,
set: dateToSystemTimezone,
index: 0
}
]
var i
var tokens = formatString
.match(longFormattingTokensRegExp)
.map(function(substring) {
var firstCharacter = substring[0]
if (firstCharacter === 'p' || firstCharacter === 'P') {
var longFormatter = longFormatters[firstCharacter]
return longFormatter(substring, locale.formatLong, subFnOptions)
}
return substring
})
.join('')
.match(formattingTokensRegExp)
const usedTokens = []
for (i = 0; i < tokens.length; i++) {
var token = tokens[i]
if (
!options.useAdditionalWeekYearTokens &&
isProtectedWeekYearToken(token)
) {
throwProtectedError(token)
}
if (
!options.useAdditionalDayOfYearTokens &&
isProtectedDayOfYearToken(token)
) {
throwProtectedError(token)
}
var firstCharacter = token[0]
var parser = parsers[firstCharacter]
if (parser) {
const { incompatibleTokens } = parser
if (Array.isArray(incompatibleTokens)) {
let incompatibleToken
for (let i = 0; i < usedTokens.length; i++) {
const usedToken = usedTokens[i].token
if (
incompatibleTokens.indexOf(usedToken) !== -1 ||
usedToken === firstCharacter
) {
incompatibleToken = usedTokens[i]
break
}
}
if (incompatibleToken) {
throw new RangeError(
`The format string mustn't contain \`${incompatibleToken.fullToken}\` and \`${token}\` at the same time`
)
}
} else if (parser.incompatibleTokens === '*' && usedTokens.length) {
throw new RangeError(
`The format string mustn't contain \`${token}\` and any other token at the same time`
)
}
usedTokens.push({ token: firstCharacter, fullToken: token })
var parseResult = parser.parse(
dateString,
token,
locale.match,
subFnOptions
)
if (!parseResult) {
return new Date(NaN)
}
setters.push({
priority: parser.priority,
set: parser.set,
validate: parser.validate,
value: parseResult.value,
index: setters.length
})
dateString = parseResult.rest
} else {
if (firstCharacter.match(unescapedLatinCharacterRegExp)) {
throw new RangeError(
'Format string contains an unescaped latin alphabet character `' +
firstCharacter +
'`'
)
}
// Replace two single quote characters with one single quote character
if (token === "''") {
token = "'"
} else if (firstCharacter === "'") {
token = cleanEscapedString(token)
}
// Cut token from string, or, if string doesn't match the token, return Invalid Date
if (dateString.indexOf(token) === 0) {
dateString = dateString.slice(token.length)
} else {
return new Date(NaN)
}
}
}
// Check if the remaining input contains something other than whitespace
if (dateString.length > 0 && notWhitespaceRegExp.test(dateString)) {
return new Date(NaN)
}
var uniquePrioritySetters = setters
.map(function(setter) {
return setter.priority
})
.sort(function(a, b) {
return b - a
})
.filter(function(priority, index, array) {
return array.indexOf(priority) === index
})
.map(function(priority) {
return setters
.filter(function(setter) {
return setter.priority === priority
})
.reverse()
})
.map(function(setterArray) {
return setterArray[0]
})
var date = toDate(dirtyBackupDate)
if (isNaN(date)) {
return new Date(NaN)
}
// 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/37
var utcDate = subMilliseconds(date, getTimezoneOffsetInMilliseconds(date))
var flags = {}
for (i = 0; i < uniquePrioritySetters.length; i++) {
var setter = uniquePrioritySetters[i]
if (
setter.validate &&
!setter.validate(utcDate, setter.value, subFnOptions)
) {
return new Date(NaN)
}
var result = setter.set(utcDate, flags, setter.value, subFnOptions)
// Result is tuple (date, flags)
if (result[0]) {
utcDate = result[0]
assign(flags, result[1])
// Result is date
} else {
utcDate = result
}
}
return utcDate
}
function dateToSystemTimezone(date, flags) {
if (flags.timestampIsSet) {
return date
}
var convertedDate = new Date(0)
convertedDate.setFullYear(
date.getUTCFullYear(),
date.getUTCMonth(),
date.getUTCDate()
)
convertedDate.setHours(
date.getUTCHours(),
date.getUTCMinutes(),
date.getUTCSeconds(),
date.getUTCMilliseconds()
)
return convertedDate
}
function cleanEscapedString(input) {
return input.match(escapedStringRegExp)[1].replace(doubleQuoteRegExp, "'")
}