89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
"use strict";
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exports.differenceInBusinessDays = differenceInBusinessDays;
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var _index = require("./addDays.js");
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var _index2 = require("./differenceInCalendarDays.js");
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var _index3 = require("./isSameDay.js");
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var _index4 = require("./isValid.js");
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var _index5 = require("./isWeekend.js");
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var _index6 = require("./toDate.js");
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/**
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* @name differenceInBusinessDays
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* @category Day Helpers
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* @summary Get the number of business days between the given dates.
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*
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* @description
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* Get the number of business day periods between the given dates.
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* Business days being days that arent in the weekend.
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* Like `differenceInCalendarDays`, the function removes the times from
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* the dates before calculating the difference.
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*
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* @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).
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*
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* @param dateLeft - The later date
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* @param dateRight - The earlier date
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*
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* @returns The number of business days
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*
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* @example
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* // How many business days are between
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* // 10 January 2014 and 20 July 2014?
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* const result = differenceInBusinessDays(
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* new Date(2014, 6, 20),
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* new Date(2014, 0, 10)
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* )
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* //=> 136
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*
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* // How many business days are between
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* // 30 November 2021 and 1 November 2021?
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* const result = differenceInBusinessDays(
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* new Date(2021, 10, 30),
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* new Date(2021, 10, 1)
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* )
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* //=> 21
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*
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* // How many business days are between
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* // 1 November 2021 and 1 December 2021?
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* const result = differenceInBusinessDays(
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* new Date(2021, 10, 1),
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* new Date(2021, 11, 1)
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* )
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* //=> -22
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*
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* // How many business days are between
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* // 1 November 2021 and 1 November 2021 ?
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* const result = differenceInBusinessDays(
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* new Date(2021, 10, 1),
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* new Date(2021, 10, 1)
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* )
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* //=> 0
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*/
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function differenceInBusinessDays(dateLeft, dateRight) {
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const _dateLeft = (0, _index6.toDate)(dateLeft);
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let _dateRight = (0, _index6.toDate)(dateRight);
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if (!(0, _index4.isValid)(_dateLeft) || !(0, _index4.isValid)(_dateRight))
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return NaN;
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const calendarDifference = (0, _index2.differenceInCalendarDays)(
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_dateLeft,
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_dateRight,
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);
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const sign = calendarDifference < 0 ? -1 : 1;
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const weeks = Math.trunc(calendarDifference / 7);
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let result = weeks * 5;
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_dateRight = (0, _index.addDays)(_dateRight, weeks * 7);
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// the loop below will run at most 6 times to account for the remaining days that don't makeup a full week
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while (!(0, _index3.isSameDay)(_dateLeft, _dateRight)) {
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// sign is used to account for both negative and positive differences
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result += (0, _index5.isWeekend)(_dateRight) ? 0 : sign;
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_dateRight = (0, _index.addDays)(_dateRight, sign);
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}
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// Prevent negative zero
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return result === 0 ? 0 : result;
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}
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