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				1.8 KiB
			
		
		
			
		
	
	
					53 lines
				
				1.8 KiB
			| 
											3 years ago
										 | import toDate from '../toDate/index.js'; | ||
|  | import requiredArgs from '../_lib/requiredArgs/index.js'; | ||
|  | /** | ||
|  |  * @name eachYearOfInterval | ||
|  |  * @category Interval Helpers | ||
|  |  * @summary Return the array of yearly timestamps within the specified time interval. | ||
|  |  * | ||
|  |  * @description | ||
|  |  * Return the array of yearly timestamps within the specified time interval. | ||
|  |  * | ||
|  |  * @param {Interval} interval - the interval. See [Interval]{@link docs/types/Interval} | ||
|  |  * @returns {Date[]} the array with starts of yearly timestamps from the month of the interval start to the month of the interval end | ||
|  |  * @throws {TypeError} 1 argument required | ||
|  |  * @throws {RangeError} The start of an interval cannot be after its end | ||
|  |  * @throws {RangeError} Date in interval cannot be `Invalid Date` | ||
|  |  * | ||
|  |  * @example | ||
|  |  * // Each year between 6 February 2014 and 10 August 2017:
 | ||
|  |  * var result = eachYearOfInterval({ | ||
|  |  *   start: new Date(2014, 1, 6), | ||
|  |  *   end: new Date(2017, 7, 10) | ||
|  |  * }) | ||
|  |  * //=> [
 | ||
|  |  * //   Wed Jan 01 2014 00:00:00,
 | ||
|  |  * //   Thu Jan 01 2015 00:00:00,
 | ||
|  |  * //   Fri Jan 01 2016 00:00:00,
 | ||
|  |  * //   Sun Jan 01 2017 00:00:00
 | ||
|  |  * // ]
 | ||
|  |  */ | ||
|  | 
 | ||
|  | export default function eachYearOfInterval(dirtyInterval) { | ||
|  |   requiredArgs(1, arguments); | ||
|  |   var interval = dirtyInterval || {}; | ||
|  |   var startDate = toDate(interval.start); | ||
|  |   var endDate = toDate(interval.end); | ||
|  |   var endTime = endDate.getTime(); // Throw an exception if start date is after end date or if any date is `Invalid Date`
 | ||
|  | 
 | ||
|  |   if (!(startDate.getTime() <= endTime)) { | ||
|  |     throw new RangeError('Invalid interval'); | ||
|  |   } | ||
|  | 
 | ||
|  |   var dates = []; | ||
|  |   var currentDate = startDate; | ||
|  |   currentDate.setHours(0, 0, 0, 0); | ||
|  |   currentDate.setMonth(0, 1); | ||
|  | 
 | ||
|  |   while (currentDate.getTime() <= endTime) { | ||
|  |     dates.push(toDate(currentDate)); | ||
|  |     currentDate.setFullYear(currentDate.getFullYear() + 1); | ||
|  |   } | ||
|  | 
 | ||
|  |   return dates; | ||
|  | } |