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authorPinapelz <yukais@pinapelz.com>2025-06-28 17:26:46 -0700
committerPinapelz <yukais@pinapelz.com>2025-06-28 17:43:56 -0700
commite4fa1e69e7ebfb627c7198fd1a9881e9327ec4d4 (patch)
tree06284a538a6008eca75051399e47db4e5d50301c /node_modules/date-fns/esm/setWeekYear/index.js
initial commit: scaffolding
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+import differenceInCalendarDays from "../differenceInCalendarDays/index.js";
+import startOfWeekYear from "../startOfWeekYear/index.js";
+import toDate from "../toDate/index.js";
+import toInteger from "../_lib/toInteger/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+import { getDefaultOptions } from "../_lib/defaultOptions/index.js";
+/**
+ * @name setWeekYear
+ * @category Week-Numbering Year Helpers
+ * @summary Set the local week-numbering year to the given date.
+ *
+ * @description
+ * Set the local week-numbering year to the given date,
+ * saving the week number and the weekday number.
+ * 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 date to be changed
+ * @param {Number} weekYear - the local week-numbering year 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)
+ * @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 new date with the local week-numbering year set
+ * @throws {TypeError} 2 arguments required
+ * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
+ * @throws {RangeError} `options.firstWeekContainsDate` must be between 1 and 7
+ *
+ * @example
+ * // Set the local week-numbering year 2004 to 2 January 2010 with default options:
+ * const result = setWeekYear(new Date(2010, 0, 2), 2004)
+ * //=> Sat Jan 03 2004 00:00:00
+ *
+ * @example
+ * // Set the local week-numbering year 2004 to 2 January 2010,
+ * // if Monday is the first day of week
+ * // and 4 January is always in the first week of the year:
+ * const result = setWeekYear(new Date(2010, 0, 2), 2004, {
+ * weekStartsOn: 1,
+ * firstWeekContainsDate: 4
+ * })
+ * //=> Sat Jan 01 2005 00:00:00
+ */
+export default function setWeekYear(dirtyDate, dirtyWeekYear, options) {
+ var _ref, _ref2, _ref3, _options$firstWeekCon, _options$locale, _options$locale$optio, _defaultOptions$local, _defaultOptions$local2;
+ requiredArgs(2, 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 date = toDate(dirtyDate);
+ var weekYear = toInteger(dirtyWeekYear);
+ var diff = differenceInCalendarDays(date, startOfWeekYear(date, options));
+ var firstWeek = new Date(0);
+ firstWeek.setFullYear(weekYear, 0, firstWeekContainsDate);
+ firstWeek.setHours(0, 0, 0, 0);
+ date = startOfWeekYear(firstWeek, options);
+ date.setDate(date.getDate() + diff);
+ return date;
+} \ No newline at end of file
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