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 王天杨
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"use strict";
exports.roundToNearestHours = roundToNearestHours;
var _index = require("./_lib/getRoundingMethod.js");
var _index2 = require("./constructFrom.js");
var _index3 = require("./toDate.js");
/**
* The {@link roundToNearestHours} function options.
*/
/**
* @name roundToNearestHours
* @category Hour Helpers
* @summary Rounds the given date to the nearest hour
*
* @description
* Rounds the given date to the nearest hour (or number of hours).
* Rounds up when the given date is exactly between the nearest round hours.
*
* @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 round
* @param options - An object with options.
*
* @returns The new date rounded to the closest hour
*
* @example
* // Round 10 July 2014 12:34:56 to nearest hour:
* const result = roundToNearestHours(new Date(2014, 6, 10, 12, 34, 56))
* //=> Thu Jul 10 2014 13:00:00
*
* @example
* // Round 10 July 2014 12:34:56 to nearest half hour:
* const result = roundToNearestHours(new Date(2014, 6, 10, 12, 34, 56), { nearestTo: 6 })
* //=> Thu Jul 10 2014 12:00:00
* @example
* // Round 10 July 2014 12:34:56 to nearest half hour:
* const result = roundToNearestHours(new Date(2014, 6, 10, 12, 34, 56), { nearestTo: 8 })
* //=> Thu Jul 10 2014 16:00:00
* @example
* // Floor (rounds down) 10 July 2014 12:34:56 to nearest hour:
* const result = roundToNearestHours(new Date(2014, 6, 10, 1, 23, 45), { roundingMethod: 'ceil' })
* //=> Thu Jul 10 2014 02:00:00
*
* @example
* // Ceil (rounds up) 10 July 2014 12:34:56 to nearest quarter hour:
* const result = roundToNearestHours(new Date(2014, 6, 10, 12, 34, 56), { roundingMethod: 'floor', nearestTo: 8 })
* //=> Thu Jul 10 2014 08:00:00
*/
function roundToNearestHours(date, options) {
const nearestTo = options?.nearestTo ?? 1;
if (nearestTo < 1 || nearestTo > 12)
return (0, _index2.constructFrom)(date, NaN);
const _date = (0, _index3.toDate)(date);
const fractionalMinutes = _date.getMinutes() / 60;
const fractionalSeconds = _date.getSeconds() / 60 / 60;
const fractionalMilliseconds = _date.getMilliseconds() / 1000 / 60 / 60;
const hours =
_date.getHours() +
fractionalMinutes +
fractionalSeconds +
fractionalMilliseconds;
// Unlike the `differenceIn*` functions, the default rounding behavior is `round` and not 'trunc'
const method = options?.roundingMethod ?? "round";
const roundingMethod = (0, _index.getRoundingMethod)(method);
// nearestTo option does not care daylight savings time
const roundedHours = roundingMethod(hours / nearestTo) * nearestTo;
const result = (0, _index2.constructFrom)(date, _date);
result.setHours(roundedHours, 0, 0, 0);
return result;
}
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