64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
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import { addHours } from "./addHours.mjs";
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import { toDate } from "./toDate.mjs";
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/**
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* The {@link eachHourOfInterval} function options.
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*/
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/**
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* @name eachHourOfInterval
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* @category Interval Helpers
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* @summary Return the array of hours within the specified time interval.
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*
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* @description
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* Return the array of hours within the specified time interval.
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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 interval - The interval.
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* @param options - An object with options.
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*
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* @returns The array with starts of hours from the hour of the interval start to the hour of the interval end
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*
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* @example
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* // Each hour between 6 October 2014, 12:00 and 6 October 2014, 15:00
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* const result = eachHourOfInterval({
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* start: new Date(2014, 9, 6, 12),
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* end: new Date(2014, 9, 6, 15)
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* })
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* //=> [
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* // Mon Oct 06 2014 12:00:00,
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* // Mon Oct 06 2014 13:00:00,
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* // Mon Oct 06 2014 14:00:00,
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* // Mon Oct 06 2014 15:00:00
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* // ]
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*/
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export function eachHourOfInterval(interval, options) {
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const startDate = toDate(interval.start);
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const endDate = toDate(interval.end);
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let reversed = +startDate > +endDate;
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const endTime = reversed ? +startDate : +endDate;
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let currentDate = reversed ? endDate : startDate;
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currentDate.setMinutes(0, 0, 0);
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let step = options?.step ?? 1;
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if (!step) return [];
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if (step < 0) {
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step = -step;
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reversed = !reversed;
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}
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const dates = [];
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while (+currentDate <= endTime) {
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dates.push(toDate(currentDate));
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currentDate = addHours(currentDate, step);
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}
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return reversed ? dates.reverse() : dates;
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}
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// Fallback for modularized imports:
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export default eachHourOfInterval;
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