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"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = setISOWeekYear;
var _index = _interopRequireDefault(require("../_lib/toInteger/index.js"));
var _index2 = _interopRequireDefault(require("../toDate/index.js"));
var _index3 = _interopRequireDefault(require("../startOfISOWeekYear/index.js"));
var _index4 = _interopRequireDefault(require("../differenceInCalendarDays/index.js"));
var _index5 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
/**
* @name setISOWeekYear
* @category ISO Week-Numbering Year Helpers
* @summary Set the ISO week-numbering year to the given date.
*
* @description
* Set the ISO week-numbering year to the given date,
* saving the week number and the weekday number.
*
* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
*
* @param {Date|Number} date - the date to be changed
* @param {Number} isoWeekYear - the ISO week-numbering year of the new date
* @returns {Date} the new date with the ISO week-numbering year set
* @throws {TypeError} 2 arguments required
*
* @example
* // Set ISO week-numbering year 2007 to 29 December 2008:
* const result = setISOWeekYear(new Date(2008, 11, 29), 2007)
* //=> Mon Jan 01 2007 00:00:00
*/
function setISOWeekYear(dirtyDate, dirtyISOWeekYear) {
(0, _index5.default)(2, arguments);
var date = (0, _index2.default)(dirtyDate);
var isoWeekYear = (0, _index.default)(dirtyISOWeekYear);
var diff = (0, _index4.default)(date, (0, _index3.default)(date));
var fourthOfJanuary = new Date(0);
fourthOfJanuary.setFullYear(isoWeekYear, 0, 4);
fourthOfJanuary.setHours(0, 0, 0, 0);
date = (0, _index3.default)(fourthOfJanuary);
date.setDate(date.getDate() + diff);
return date;
}
module.exports = exports.default;
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