Current File : //var/www/html/node_modules/date-fns/differenceInCalendarWeeks/index.js
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = differenceInCalendarWeeks;
var _index = _interopRequireDefault(require("../startOfWeek/index.js"));
var _index2 = _interopRequireDefault(require("../_lib/getTimezoneOffsetInMilliseconds/index.js"));
var _index3 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var MILLISECONDS_IN_WEEK = 604800000;
/**
* @name differenceInCalendarWeeks
* @category Week Helpers
* @summary Get the number of calendar weeks between the given dates.
*
* @description
* Get the number of calendar weeks between the given dates.
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* @param {Date|Number} dateLeft - the later date
* @param {Date|Number} dateRight - the earlier date
* @param {Object} [options] - an object with options.
* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
* @returns {Number} the number of calendar weeks
* @throws {TypeError} 2 arguments required
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
*
* @example
* // How many calendar weeks are between 5 July 2014 and 20 July 2014?
* const result = differenceInCalendarWeeks(
* new Date(2014, 6, 20),
* new Date(2014, 6, 5)
* )
* //=> 3
*
* @example
* // If the week starts on Monday,
* // how many calendar weeks are between 5 July 2014 and 20 July 2014?
* const result = differenceInCalendarWeeks(
* new Date(2014, 6, 20),
* new Date(2014, 6, 5),
* { weekStartsOn: 1 }
* )
* //=> 2
*/
function differenceInCalendarWeeks(dirtyDateLeft, dirtyDateRight, dirtyOptions) {
(0, _index3.default)(2, arguments);
var startOfWeekLeft = (0, _index.default)(dirtyDateLeft, dirtyOptions);
var startOfWeekRight = (0, _index.default)(dirtyDateRight, dirtyOptions);
var timestampLeft = startOfWeekLeft.getTime() - (0, _index2.default)(startOfWeekLeft);
var timestampRight = startOfWeekRight.getTime() - (0, _index2.default)(startOfWeekRight); // Round the number of days to the nearest integer
// because the number of milliseconds in a week is not constant
// (e.g. it's different in the week of the daylight saving time clock shift)
return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_WEEK);
}
module.exports = exports.default;
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