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- "use strict";
- var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = startOfWeekYear;
- var _index = _interopRequireDefault(require("../getWeekYear/index.js"));
- var _index2 = _interopRequireDefault(require("../startOfWeek/index.js"));
- var _index3 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
- var _index4 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
- var _index5 = require("../_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
- */
- function startOfWeekYear(dirtyDate, options) {
- var _ref, _ref2, _ref3, _options$firstWeekCon, _options$locale, _options$locale$optio, _defaultOptions$local, _defaultOptions$local2;
- (0, _index4.default)(1, arguments);
- var defaultOptions = (0, _index5.getDefaultOptions)();
- var firstWeekContainsDate = (0, _index3.default)((_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 = (0, _index.default)(dirtyDate, options);
- var firstWeek = new Date(0);
- firstWeek.setFullYear(year, 0, firstWeekContainsDate);
- firstWeek.setHours(0, 0, 0, 0);
- var date = (0, _index2.default)(firstWeek, options);
- return date;
- }
- module.exports = exports.default;
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