94 lines
3.9 KiB
JavaScript
94 lines
3.9 KiB
JavaScript
"use strict";
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.default = getWeekYear;
|
|
|
|
var _index = _interopRequireDefault(require("../startOfWeek/index.js"));
|
|
|
|
var _index2 = _interopRequireDefault(require("../toDate/index.js"));
|
|
|
|
var _index3 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
|
|
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
|
|
|
/**
|
|
* @name getWeekYear
|
|
* @category Week-Numbering Year Helpers
|
|
* @summary Get the local week-numbering year of the given date.
|
|
*
|
|
* @description
|
|
* Get the local week-numbering year of the given date.
|
|
* 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
|
|
*
|
|
* ### 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 given 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 {Number} the local 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
|
|
* // Which week numbering year is 26 December 2004 with the default settings?
|
|
* var result = getWeekYear(new Date(2004, 11, 26))
|
|
* //=> 2005
|
|
*
|
|
* @example
|
|
* // Which week numbering year is 26 December 2004 if week starts on Saturday?
|
|
* var result = getWeekYear(new Date(2004, 11, 26), { weekStartsOn: 6 })
|
|
* //=> 2004
|
|
*
|
|
* @example
|
|
* // Which week numbering year is 26 December 2004 if the first week contains 4 January?
|
|
* var result = getWeekYear(new Date(2004, 11, 26), { firstWeekContainsDate: 4 })
|
|
* //=> 2004
|
|
*/
|
|
function getWeekYear(dirtyDate, dirtyOptions) {
|
|
if (arguments.length < 1) {
|
|
throw new TypeError('1 argument required, but only ' + arguments.length + ' present');
|
|
}
|
|
|
|
var date = (0, _index2.default)(dirtyDate);
|
|
var year = date.getFullYear();
|
|
var options = dirtyOptions || {};
|
|
var locale = options.locale;
|
|
var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
|
|
var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : (0, _index3.default)(localeFirstWeekContainsDate);
|
|
var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : (0, _index3.default)(options.firstWeekContainsDate); // Test if weekStartsOn is between 1 and 7 _and_ is not NaN
|
|
|
|
if (!(firstWeekContainsDate >= 1 && firstWeekContainsDate <= 7)) {
|
|
throw new RangeError('firstWeekContainsDate must be between 1 and 7 inclusively');
|
|
}
|
|
|
|
var firstWeekOfNextYear = new Date(0);
|
|
firstWeekOfNextYear.setFullYear(year + 1, 0, firstWeekContainsDate);
|
|
firstWeekOfNextYear.setHours(0, 0, 0, 0);
|
|
var startOfNextYear = (0, _index.default)(firstWeekOfNextYear, dirtyOptions);
|
|
var firstWeekOfThisYear = new Date(0);
|
|
firstWeekOfThisYear.setFullYear(year, 0, firstWeekContainsDate);
|
|
firstWeekOfThisYear.setHours(0, 0, 0, 0);
|
|
var startOfThisYear = (0, _index.default)(firstWeekOfThisYear, dirtyOptions);
|
|
|
|
if (date.getTime() >= startOfNextYear.getTime()) {
|
|
return year + 1;
|
|
} else if (date.getTime() >= startOfThisYear.getTime()) {
|
|
return year;
|
|
} else {
|
|
return year - 1;
|
|
}
|
|
}
|
|
|
|
module.exports = exports.default; |