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 王天杨
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import type { Interval } from "./types.js";
/**
* @name getOverlappingDaysInIntervals
* @category Interval Helpers
* @summary Get the number of days that overlap in two time intervals
*
* @description
* Get the number of days that overlap in two time intervals. It uses the time
* between dates to calculate the number of days, rounding it up to include
* partial days.
*
* Two equal 0-length intervals will result in 0. Two equal 1ms intervals will
* result in 1.
*
* @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 intervalLeft - The first interval to compare.
* @param intervalRight - The second interval to compare.
*
* @returns The number of days that overlap in two time intervals
*
* @example
* // For overlapping time intervals adds 1 for each started overlapping day:
* getOverlappingDaysInIntervals(
* { start: new Date(2014, 0, 10), end: new Date(2014, 0, 20) },
* { start: new Date(2014, 0, 17), end: new Date(2014, 0, 21) }
* )
* //=> 3
*
* @example
* // For non-overlapping time intervals returns 0:
* getOverlappingDaysInIntervals(
* { start: new Date(2014, 0, 10), end: new Date(2014, 0, 20) },
* { start: new Date(2014, 0, 21), end: new Date(2014, 0, 22) }
* )
* //=> 0
*/
export declare function getOverlappingDaysInIntervals<DateType extends Date>(
intervalLeft: Interval<DateType>,
intervalRight: Interval<DateType>,
): number;
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