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- "use strict";
- var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = closestTo;
- var _index = _interopRequireDefault(require("../toDate/index.js"));
- var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
- /**
- * @name closestTo
- * @category Common Helpers
- * @summary Return a date from the array closest to the given date.
- *
- * @description
- * Return a date from the array closest to the given date.
- *
- * @param {Date | Number} dateToCompare - the date to compare with
- * @param {Array<Date> | Array<number>} datesArray - the array to search
- * @returns {Date | undefined} the date from the array closest to the given date or undefined if no valid value is given
- * @throws {TypeError} 2 arguments required
- *
- * @example
- * // Which date is closer to 6 September 2015: 1 January 2000 or 1 January 2030?
- * const dateToCompare = new Date(2015, 8, 6)
- * const result = closestTo(dateToCompare, [
- * new Date(2000, 0, 1),
- * new Date(2030, 0, 1)
- * ])
- * //=> Tue Jan 01 2030 00:00:00
- */
- function closestTo(dirtyDateToCompare, dirtyDatesArray) {
- (0, _index2.default)(2, arguments);
- var dateToCompare = (0, _index.default)(dirtyDateToCompare);
- if (isNaN(Number(dateToCompare))) return new Date(NaN);
- var timeToCompare = dateToCompare.getTime();
- var datesArray;
- // `dirtyDatesArray` is undefined or null
- if (dirtyDatesArray == null) {
- datesArray = [];
- // `dirtyDatesArray` is Array, Set or Map, or object with custom `forEach` method
- } else if (typeof dirtyDatesArray.forEach === 'function') {
- datesArray = dirtyDatesArray;
- // If `dirtyDatesArray` is Array-like Object, convert to Array. Otherwise, make it empty Array
- } else {
- datesArray = Array.prototype.slice.call(dirtyDatesArray);
- }
- var result;
- var minDistance;
- datesArray.forEach(function (dirtyDate) {
- var currentDate = (0, _index.default)(dirtyDate);
- if (isNaN(Number(currentDate))) {
- result = new Date(NaN);
- minDistance = NaN;
- return;
- }
- var distance = Math.abs(timeToCompare - currentDate.getTime());
- if (result == null || distance < Number(minDistance)) {
- result = currentDate;
- minDistance = distance;
- }
- });
- return result;
- }
- module.exports = exports.default;
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