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- import { addQuarters } from "./addQuarters.mjs";
- import { startOfQuarter } from "./startOfQuarter.mjs";
- import { toDate } from "./toDate.mjs";
- /**
- * The {@link eachQuarterOfInterval} function options.
- */
- /**
- * @name eachQuarterOfInterval
- * @category Interval Helpers
- * @summary Return the array of quarters within the specified time interval.
- *
- * @description
- * Return the array of quarters within the specified time interval.
- *
- * @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 interval - The interval
- *
- * @returns The array with starts of quarters from the quarter of the interval start to the quarter of the interval end
- *
- * @example
- * // Each quarter within interval 6 February 2014 - 10 August 2014:
- * const result = eachQuarterOfInterval({
- * start: new Date(2014, 1, 6),
- * end: new Date(2014, 7, 10)
- * })
- * //=> [
- * // Wed Jan 01 2014 00:00:00,
- * // Tue Apr 01 2014 00:00:00,
- * // Tue Jul 01 2014 00:00:00,
- * // ]
- */
- export function eachQuarterOfInterval(interval, options) {
- const startDate = toDate(interval.start);
- const endDate = toDate(interval.end);
- let reversed = +startDate > +endDate;
- const endTime = reversed
- ? +startOfQuarter(startDate)
- : +startOfQuarter(endDate);
- let currentDate = reversed
- ? startOfQuarter(endDate)
- : startOfQuarter(startDate);
- let step = options?.step ?? 1;
- if (!step) return [];
- if (step < 0) {
- step = -step;
- reversed = !reversed;
- }
- const dates = [];
- while (+currentDate <= endTime) {
- dates.push(toDate(currentDate));
- currentDate = addQuarters(currentDate, step);
- }
- return reversed ? dates.reverse() : dates;
- }
- // Fallback for modularized imports:
- export default eachQuarterOfInterval;
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