53 lines
3.0 KiB
JavaScript
53 lines
3.0 KiB
JavaScript
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import addDays from "../addDays/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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import requiredArgs from "../_lib/requiredArgs/index.js";
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import { getDefaultOptions } from "../_lib/defaultOptions/index.js";
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/**
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* @name setDay
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* @category Weekday Helpers
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* @summary Set the day of the week to the given date.
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*
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* @description
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* Set the day of the week to the given date.
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*
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* @param {Date|Number} date - the date to be changed
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* @param {Number} day - the day of the week 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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* @returns {Date} the new date with the day of the week 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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*
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* @example
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* // Set week day to Sunday, with the default weekStartsOn of Sunday:
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* const result = setDay(new Date(2014, 8, 1), 0)
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* //=> Sun Aug 31 2014 00:00:00
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*
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* @example
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* // Set week day to Sunday, with a weekStartsOn of Monday:
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* const result = setDay(new Date(2014, 8, 1), 0, { weekStartsOn: 1 })
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* //=> Sun Sep 07 2014 00:00:00
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*/
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export default function setDay(dirtyDate, dirtyDay, options) {
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var _ref, _ref2, _ref3, _options$weekStartsOn, _options$locale, _options$locale$optio, _defaultOptions$local, _defaultOptions$local2;
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requiredArgs(2, arguments);
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var defaultOptions = getDefaultOptions();
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var weekStartsOn = toInteger((_ref = (_ref2 = (_ref3 = (_options$weekStartsOn = options === null || options === void 0 ? void 0 : options.weekStartsOn) !== null && _options$weekStartsOn !== void 0 ? _options$weekStartsOn : options === null || options === void 0 ? void 0 : (_options$locale = options.locale) === null || _options$locale === void 0 ? void 0 : (_options$locale$optio = _options$locale.options) === null || _options$locale$optio === void 0 ? void 0 : _options$locale$optio.weekStartsOn) !== null && _ref3 !== void 0 ? _ref3 : defaultOptions.weekStartsOn) !== null && _ref2 !== void 0 ? _ref2 : (_defaultOptions$local = defaultOptions.locale) === null || _defaultOptions$local === void 0 ? void 0 : (_defaultOptions$local2 = _defaultOptions$local.options) === null || _defaultOptions$local2 === void 0 ? void 0 : _defaultOptions$local2.weekStartsOn) !== null && _ref !== void 0 ? _ref : 0); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN
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if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
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throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
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}
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var date = toDate(dirtyDate);
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var day = toInteger(dirtyDay);
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var currentDay = date.getDay();
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var remainder = day % 7;
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var dayIndex = (remainder + 7) % 7;
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var delta = 7 - weekStartsOn;
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var diff = day < 0 || day > 6 ? day - (currentDay + delta) % 7 : (dayIndex + delta) % 7 - (currentDay + delta) % 7;
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return addDays(date, diff);
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}
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