58 lines
2.3 KiB
JavaScript
58 lines
2.3 KiB
JavaScript
import addDays from '../addDays/index.js';
|
|
import toDate from '../toDate/index.js';
|
|
import toInteger from '../_lib/toInteger/index.js';
|
|
/**
|
|
* @name setDay
|
|
* @category Weekday Helpers
|
|
* @summary Set the day of the week to the given date.
|
|
*
|
|
* @description
|
|
* Set the day of the week to the given date.
|
|
*
|
|
* ### 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} day - the day of the week 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)
|
|
* @returns {Date} the new date with the day of the week set
|
|
* @throws {TypeError} 2 arguments required
|
|
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
|
|
*
|
|
* @example
|
|
* // Set Sunday to 1 September 2014:
|
|
* var result = setDay(new Date(2014, 8, 1), 0)
|
|
* //=> Sun Aug 31 2014 00:00:00
|
|
*
|
|
* @example
|
|
* // If week starts with Monday, set Sunday to 1 September 2014:
|
|
* var result = setDay(new Date(2014, 8, 1), 0, { weekStartsOn: 1 })
|
|
* //=> Sun Sep 07 2014 00:00:00
|
|
*/
|
|
|
|
export default function setDay(dirtyDate, dirtyDay, dirtyOptions) {
|
|
if (arguments.length < 2) {
|
|
throw new TypeError('2 arguments required, but only ' + arguments.length + ' present');
|
|
}
|
|
|
|
var options = dirtyOptions || {};
|
|
var locale = options.locale;
|
|
var localeWeekStartsOn = locale && 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');
|
|
}
|
|
|
|
var date = toDate(dirtyDate, options);
|
|
var day = toInteger(dirtyDay);
|
|
var currentDay = date.getDay();
|
|
var remainder = day % 7;
|
|
var dayIndex = (remainder + 7) % 7;
|
|
var diff = (dayIndex < weekStartsOn ? 7 : 0) + day - currentDay;
|
|
return addDays(date, diff, options);
|
|
} |