75 lines
2.8 KiB
JavaScript
75 lines
2.8 KiB
JavaScript
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import addWeeks from '../addWeeks/index.js';
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import startOfWeek from '../startOfWeek/index.js';
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import toDate from '../toDate/index.js';
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/**
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* @name eachWeekOfInterval
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* @category Interval Helpers
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* @summary Return the array of weeks within the specified time interval.
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*
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* @description
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* Return the array of weeks within the specified time interval.
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*
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* ### v2.0.0 breaking changes:
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*
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
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*
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* @param {Interval} interval - the interval. See [Interval]{@link docs/types/Interval}
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* @param {Object} [options] - an object with options.
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* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
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* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
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* @returns {Date[]} the array with starts of weeks from the week of the interval start to the week of the interval end
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* @throws {TypeError} 1 argument required
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* @throws {RangeError} `options.weekStartsOn` must be 0, 1, ..., 6
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* @throws {RangeError} The start of an interval cannot be after its end
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* @throws {RangeError} Date in interval cannot be `Invalid Date`
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*
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* @example
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* // Each week within interval 6 October 2014 - 23 November 2014:
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* var result = eachWeekOfInterval({
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* start: new Date(2014, 9, 6),
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* end: new Date(2014, 10, 23)
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* })
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* //=> [
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* // Sun Oct 05 2014 00:00:00,
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* // Sun Oct 12 2014 00:00:00,
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* // Sun Oct 19 2014 00:00:00,
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* // Sun Oct 26 2014 00:00:00,
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* // Sun Nov 02 2014 00:00:00,
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* // Sun Nov 09 2014 00:00:00,
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* // Sun Nov 16 2014 00:00:00,
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* // Sun Nov 23 2014 00:00:00
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* // ]
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*/
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export default function eachWeekOfInterval(dirtyInterval, options) {
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if (arguments.length < 1) {
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throw new TypeError('1 argument required, but only ' + arguments.length + ' present');
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}
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var interval = dirtyInterval || {};
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var startDate = toDate(interval.start);
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var endDate = toDate(interval.end);
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var endTime = endDate.getTime(); // Throw an exception if start date is after end date or if any date is `Invalid Date`
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if (!(startDate.getTime() <= endTime)) {
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throw new RangeError('Invalid interval');
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}
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var startDateWeek = startOfWeek(startDate, options);
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var endDateWeek = startOfWeek(endDate, options); // Some timezones switch DST at midnight, making start of day unreliable in these timezones, 3pm is a safe bet
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startDateWeek.setHours(15);
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endDateWeek.setHours(15);
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endTime = endDateWeek.getTime();
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var weeks = [];
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var currentWeek = startDateWeek;
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while (currentWeek.getTime() <= endTime) {
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currentWeek.setHours(0);
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weeks.push(toDate(currentWeek));
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currentWeek = addWeeks(currentWeek, 1);
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currentWeek.setHours(15);
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}
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return weeks;
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}
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