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// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
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import { setWeekYear } from 'date-fns'
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export default setWeekYear
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import differenceInCalendarDays from '../differenceInCalendarDays/index.js';
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import startOfWeekYear from '../startOfWeekYear/index.js';
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import toDate from '../toDate/index.js';
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import toInteger from '../_lib/toInteger/index.js';
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/**
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* @name setWeekYear
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* @category Week-Numbering Year Helpers
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* @summary Set the local week-numbering year to the given date.
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*
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* @description
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* Set the local week-numbering year to the given date,
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* saving the week number and the weekday number.
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* The exact calculation depends on the values of
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* `options.weekStartsOn` (which is the index of the first day of the week)
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* and `options.firstWeekContainsDate` (which is the day of January, which is always in
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* the first week of the week-numbering year)
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*
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* Week numbering: https://en.wikipedia.org/wiki/Week#Week_numbering
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*
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* ### v2.0.0 breaking changes:
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*
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
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*
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* @param {Date|Number} date - the date to be changed
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* @param {Number} weekYear - the local week-numbering year of the new date
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* @param {Object} [options] - an object with options.
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* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
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* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
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* @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
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* @returns {Date} the new date with the local week-numbering year set
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* @throws {TypeError} 2 arguments required
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* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
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* @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
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*
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* @example
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* // Set the local week-numbering year 2004 to 2 January 2010 with default options:
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* var result = setWeekYear(new Date(2010, 0, 2), 2004)
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* //=> Sat Jan 03 2004 00:00:00
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*
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* @example
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* // Set the local week-numbering year 2004 to 2 January 2010,
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* // if Monday is the first day of week
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* // and 4 January is always in the first week of the year:
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* var result = setWeekYear(new Date(2010, 0, 2), 2004, {
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* weekStartsOn: 1,
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* firstWeekContainsDate: 4
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* })
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* //=> Sat Jan 01 2005 00:00:00
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*/
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export default function setWeekYear(dirtyDate, dirtyWeekYear, dirtyOptions) {
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if (arguments.length < 2) {
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throw new TypeError('2 arguments required, but only ' + arguments.length + ' present');
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}
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var options = dirtyOptions || {};
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var locale = options.locale;
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var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
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var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
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var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate);
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var date = toDate(dirtyDate);
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var weekYear = toInteger(dirtyWeekYear);
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var diff = differenceInCalendarDays(date, startOfWeekYear(date, dirtyOptions));
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var firstWeek = new Date(0);
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firstWeek.setFullYear(weekYear, 0, firstWeekContainsDate);
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firstWeek.setHours(0, 0, 0, 0);
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date = startOfWeekYear(firstWeek, dirtyOptions);
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date.setDate(date.getDate() + diff);
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return date;
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}
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// @flow
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// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
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export type Interval = {
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start: Date | number,
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end: Date | number
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}
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export type Locale = {
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formatDistance: (...args: Array<any>) => any,
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formatRelative: (...args: Array<any>) => any,
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localize: {
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ordinalNumber: (...args: Array<any>) => any,
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era: (...args: Array<any>) => any,
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quarter: (...args: Array<any>) => any,
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month: (...args: Array<any>) => any,
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day: (...args: Array<any>) => any,
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dayPeriod: (...args: Array<any>) => any
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},
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formatLong: Object,
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date: (...args: Array<any>) => any,
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time: (...args: Array<any>) => any,
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dateTime: (...args: Array<any>) => any,
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match: {
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ordinalNumber: (...args: Array<any>) => any,
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era: (...args: Array<any>) => any,
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quarter: (...args: Array<any>) => any,
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month: (...args: Array<any>) => any,
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day: (...args: Array<any>) => any,
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dayPeriod: (...args: Array<any>) => any
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},
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options?: {
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weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
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firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7
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}
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}
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declare module.exports: (
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date: Date | number,
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weekYear: number,
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options?: {
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locale?: Locale,
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weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
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firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7
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}
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) => Date
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+4
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{
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"sideEffects": false,
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"typings": "../../typings.d.ts"
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}
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