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"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = differenceInCalendarDays;
var _index = _interopRequireDefault(require("../_lib/getTimezoneOffsetInMilliseconds/index.js"));
var _index2 = _interopRequireDefault(require("../startOfDay/index.js"));
var _index3 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
var MILLISECONDS_IN_DAY = 86400000;
/**
* @name differenceInCalendarDays
* @category Day Helpers
* @summary Get the number of calendar days between the given dates.
*
* @description
* Get the number of calendar days between the given dates. This means that the times are removed
* from the dates and then the difference in days is calculated.
*
* @param {Date|Number} dateLeft - the later date
* @param {Date|Number} dateRight - the earlier date
* @returns {Number} the number of calendar days
* @throws {TypeError} 2 arguments required
*
* @example
* // How many calendar days are between
* // 2 July 2011 23:00:00 and 2 July 2012 00:00:00?
* const result = differenceInCalendarDays(
* new Date(2012, 6, 2, 0, 0),
* new Date(2011, 6, 2, 23, 0)
* )
* //=> 366
* // How many calendar days are between
* // 2 July 2011 23:59:00 and 3 July 2011 00:01:00?
* const result = differenceInCalendarDays(
* new Date(2011, 6, 3, 0, 1),
* new Date(2011, 6, 2, 23, 59)
* )
* //=> 1
*/
function differenceInCalendarDays(dirtyDateLeft, dirtyDateRight) {
(0, _index3.default)(2, arguments);
var startOfDayLeft = (0, _index2.default)(dirtyDateLeft);
var startOfDayRight = (0, _index2.default)(dirtyDateRight);
var timestampLeft = startOfDayLeft.getTime() - (0, _index.default)(startOfDayLeft);
var timestampRight = startOfDayRight.getTime() - (0, _index.default)(startOfDayRight);
// Round the number of days to the nearest integer
// because the number of milliseconds in a day is not constant
// (e.g. it's different in the day of the daylight saving time clock shift)
return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_DAY);
}
module.exports = exports.default;
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