bc518174
 王天杨
提交两个项目文件
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
"use strict";
exports.addBusinessDays = addBusinessDays;
var _index = require("./constructFrom.js");
var _index2 = require("./isSaturday.js");
var _index3 = require("./isSunday.js");
var _index4 = require("./isWeekend.js");
var _index5 = require("./toDate.js");
/**
* @name addBusinessDays
* @category Date Extension 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.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param date - The date to be changed
* @param amount - The amount of business days to be added.
*
* @returns The new date with the business days added
*
* @example
* // Add 10 business days to 1 September 2014:
* const result = addBusinessDays(new Date(2014, 8, 1), 10)
* //=> Mon Sep 15 2014 00:00:00 (skipped weekend days)
*/
function addBusinessDays(date, amount) {
const _date = (0, _index5.toDate)(date);
const startedOnWeekend = (0, _index4.isWeekend)(_date);
if (isNaN(amount)) return (0, _index.constructFrom)(date, NaN);
const hours = _date.getHours();
const sign = amount < 0 ? -1 : 1;
const fullWeeks = Math.trunc(amount / 5);
_date.setDate(_date.getDate() + fullWeeks * 7);
// Get remaining days not part of a full week
let restDays = Math.abs(amount % 5);
// Loops over remaining days
while (restDays > 0) {
_date.setDate(_date.getDate() + sign);
if (!(0, _index4.isWeekend)(_date)) restDays -= 1;
}
// If the date is a weekend day and we reduce a dividable of
// 5 from it, we land on a weekend date.
// To counter this, we add days accordingly to land on the next business day
if (startedOnWeekend && (0, _index4.isWeekend)(_date) && amount !== 0) {
// If we're reducing days, we want to add days until we land on a weekday
// If we're adding days we want to reduce days until we land on a weekday
if ((0, _index2.isSaturday)(_date))
_date.setDate(_date.getDate() + (sign < 0 ? 2 : -1));
if ((0, _index3.isSunday)(_date))
_date.setDate(_date.getDate() + (sign < 0 ? 1 : -2));
}
// Restore hours to avoid DST lag
_date.setHours(hours);
return _date;
}
|
