Tumortisch-Dist/resources/app/node_modules/date-fns/esm/addBusinessDays/index.js
2021-06-15 16:00:08 +02:00

45 lines
1.6 KiB
JavaScript

import isWeekend from '../isWeekend/index.js';
import toDate from '../toDate/index.js';
import toInteger from '../_lib/toInteger/index.js';
/**
* @name addBusinessDays
* @category Day Helpers
* @summary Add the specified number of business days (mon - fri) to the given date.
*
* @description
* Add the specified number of business days (mon - fri) to the given date, ignoring weekends.
*
* @param {Date|Number} date - the date to be changed
* @param {Number} amount - the amount of business days to be added
* @returns {Date} the new date with the business days added
* @throws {TypeError} 2 arguments required
*
* @example
* // Add 10 business days to 1 September 2014:
* var result = addBusinessDays(new Date(2014, 8, 1), 10)
* //=> Mon Sep 15 2014 00:00:00 (skipped weekend days)
*/
export default function addBusinessDays(dirtyDate, dirtyAmount) {
if (arguments.length < 2) {
throw new TypeError('2 arguments required, but only ' + arguments.length + ' present');
}
var date = toDate(dirtyDate);
var amount = toInteger(dirtyAmount);
if (isNaN(amount)) return new Date(NaN);
var hours = date.getHours();
var sign = amount < 0 ? -1 : 1;
date.setDate(date.getDate() + toInteger(amount / 5) * 7);
amount %= 5; // to get remaining days not part of a full week
var shiftSize = Math.abs(amount); // only loops over remaining days or if day is a weekend, ensures a business day is returned
while (shiftSize > 0 || isWeekend(date)) {
if (!isWeekend(date)) shiftSize -= 1;
date.setDate(date.getDate() + sign);
}
date.setHours(hours);
return date;
}