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import toInteger from '../_lib/toInteger/index'
import toDate from '../toDate/index'
import requiredArgs from '../_lib/requiredArgs/index'
/**
* @name setYear
* @category Year Helpers
* @summary Set the year to the given date.
*
* @description
* Set the year to the given date.
*
* ### 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 date to be changed
* @param {Number} year - the year of the new date
* @returns {Date} the new date with the year set
* @throws {TypeError} 2 arguments required
*
* @example
* // Set year 2013 to 1 September 2014:
* const result = setYear(new Date(2014, 8, 1), 2013)
* //=> Sun Sep 01 2013 00:00:00
*/
export default function setYear(dirtyDate: Date | number, dirtyYear: number): Date {
requiredArgs(2, arguments)
const date = toDate(dirtyDate)
const year = toInteger(dirtyYear)
// Check if date is Invalid Date because Date.prototype.setFullYear ignores the value of Invalid Date
if (isNaN(date.getTime())) {
return new Date(NaN)
}
date.setFullYear(year)
return date
}
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