Marc Mintel
5397309103
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66 lines
1.8 KiB
Plaintext
66 lines
1.8 KiB
Plaintext
import { addQuarters } from "./addQuarters.mjs";
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import { startOfQuarter } from "./startOfQuarter.mjs";
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import { toDate } from "./toDate.mjs";
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/**
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* The {@link eachQuarterOfInterval} function options.
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*/
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/**
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* @name eachQuarterOfInterval
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* @category Interval Helpers
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* @summary Return the array of quarters within the specified time interval.
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*
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* @description
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* Return the array of quarters 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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*
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* @returns The array with starts of quarters from the quarter of the interval start to the quarter of the interval end
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*
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* @example
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* // Each quarter within interval 6 February 2014 - 10 August 2014:
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* const result = eachQuarterOfInterval({
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* start: new Date(2014, 1, 6),
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* end: new Date(2014, 7, 10)
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* })
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* //=> [
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* // Wed Jan 01 2014 00:00:00,
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* // Tue Apr 01 2014 00:00:00,
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* // Tue Jul 01 2014 00:00:00,
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* // ]
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*/
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export function eachQuarterOfInterval(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
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? +startOfQuarter(startDate)
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: +startOfQuarter(endDate);
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let currentDate = reversed
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? startOfQuarter(endDate)
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: startOfQuarter(startDate);
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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 = addQuarters(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 eachQuarterOfInterval;
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