You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
3.2 KiB
68 lines
3.2 KiB
import differenceInCalendarDays from '../differenceInCalendarDays/index.js';
|
|
import startOfWeekYear from '../startOfWeekYear/index.js';
|
|
import toDate from '../toDate/index.js';
|
|
import toInteger from '../_lib/toInteger/index.js';
|
|
import requiredArgs from '../_lib/requiredArgs/index.js';
|
|
/**
|
|
* @name setWeekYear
|
|
* @category Week-Numbering Year Helpers
|
|
* @summary Set the local week-numbering year to the given date.
|
|
*
|
|
* @description
|
|
* Set the local week-numbering year to the given date,
|
|
* saving the week number and the weekday number.
|
|
* The exact calculation depends on the values of
|
|
* `options.weekStartsOn` (which is the index of the first day of the week)
|
|
* and `options.firstWeekContainsDate` (which is the day of January, which is always in
|
|
* the first week of the week-numbering year)
|
|
*
|
|
* Week numbering: https://en.wikipedia.org/wiki/Week#Week_numbering
|
|
*
|
|
* ### 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).
|
|
*
|
|
* @param {Date|Number} date - the date to be changed
|
|
* @param {Number} weekYear - the local week-numbering year of the new date
|
|
* @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
|
|
* @returns {Date} the new date with the local week-numbering year set
|
|
* @throws {TypeError} 2 arguments required
|
|
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
|
|
* @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
|
|
*
|
|
* @example
|
|
* // Set the local week-numbering year 2004 to 2 January 2010 with default options:
|
|
* var result = setWeekYear(new Date(2010, 0, 2), 2004)
|
|
* //=> Sat Jan 03 2004 00:00:00
|
|
*
|
|
* @example
|
|
* // Set the local week-numbering year 2004 to 2 January 2010,
|
|
* // if Monday is the first day of week
|
|
* // and 4 January is always in the first week of the year:
|
|
* var result = setWeekYear(new Date(2010, 0, 2), 2004, {
|
|
* weekStartsOn: 1,
|
|
* firstWeekContainsDate: 4
|
|
* })
|
|
* //=> Sat Jan 01 2005 00:00:00
|
|
*/
|
|
|
|
export default function setWeekYear(dirtyDate, dirtyWeekYear, dirtyOptions) {
|
|
requiredArgs(2, arguments);
|
|
var options = dirtyOptions || {};
|
|
var locale = options.locale;
|
|
var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
|
|
var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
|
|
var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate);
|
|
var date = toDate(dirtyDate);
|
|
var weekYear = toInteger(dirtyWeekYear);
|
|
var diff = differenceInCalendarDays(date, startOfWeekYear(date, dirtyOptions));
|
|
var firstWeek = new Date(0);
|
|
firstWeek.setFullYear(weekYear, 0, firstWeekContainsDate);
|
|
firstWeek.setHours(0, 0, 0, 0);
|
|
date = startOfWeekYear(firstWeek, dirtyOptions);
|
|
date.setDate(date.getDate() + diff);
|
|
return date;
|
|
} |