import getWeekYear from "../getWeekYear/index.js"; import startOfWeek from "../startOfWeek/index.js"; import toInteger from "../_lib/toInteger/index.js"; import requiredArgs from "../_lib/requiredArgs/index.js"; import { getDefaultOptions } from "../_lib/defaultOptions/index.js"; /** * @name startOfWeekYear * @category Week-Numbering Year Helpers * @summary Return the start of a local week-numbering year for the given date. * * @description * Return the start of a local week-numbering year. * 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 * * @param {Date|Number} date - the original 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 start of a week-numbering year * @throws {TypeError} 1 argument required * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6 * @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7 * * @example * // The start of an a week-numbering year for 2 July 2005 with default settings: * const result = startOfWeekYear(new Date(2005, 6, 2)) * //=> Sun Dec 26 2004 00:00:00 * * @example * // The start of a week-numbering year for 2 July 2005 * // if Monday is the first day of week * // and 4 January is always in the first week of the year: * const result = startOfWeekYear(new Date(2005, 6, 2), { * weekStartsOn: 1, * firstWeekContainsDate: 4 * }) * //=> Mon Jan 03 2005 00:00:00 */ export default function startOfWeekYear(dirtyDate, options) { var _ref, _ref2, _ref3, _options$firstWeekCon, _options$locale, _options$locale$optio, _defaultOptions$local, _defaultOptions$local2; requiredArgs(1, arguments); var defaultOptions = getDefaultOptions(); var firstWeekContainsDate = toInteger((_ref = (_ref2 = (_ref3 = (_options$firstWeekCon = options === null || options === void 0 ? void 0 : options.firstWeekContainsDate) !== null && _options$firstWeekCon !== void 0 ? _options$firstWeekCon : options === null || options === void 0 ? void 0 : (_options$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.firstWeekContainsDate) !== null && _ref3 !== void 0 ? _ref3 : defaultOptions.firstWeekContainsDate) !== 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.firstWeekContainsDate) !== null && _ref !== void 0 ? _ref : 1); var year = getWeekYear(dirtyDate, options); var firstWeek = new Date(0); firstWeek.setFullYear(year, 0, firstWeekContainsDate); firstWeek.setHours(0, 0, 0, 0); var date = startOfWeek(firstWeek, options); return date; }