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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+exports.default = differenceInDays;
+var _index = _interopRequireDefault(require("../toDate/index.js"));
+var _index2 = _interopRequireDefault(require("../differenceInCalendarDays/index.js"));
+var _index3 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+// Like `compareAsc` but uses local time not UTC, which is needed
+// for accurate equality comparisons of UTC timestamps that end up
+// having the same representation in local time, e.g. one hour before
+// DST ends vs. the instant that DST ends.
+function compareLocalAsc(dateLeft, dateRight) {
+ var diff = dateLeft.getFullYear() - dateRight.getFullYear() || dateLeft.getMonth() - dateRight.getMonth() || dateLeft.getDate() - dateRight.getDate() || dateLeft.getHours() - dateRight.getHours() || dateLeft.getMinutes() - dateRight.getMinutes() || dateLeft.getSeconds() - dateRight.getSeconds() || dateLeft.getMilliseconds() - dateRight.getMilliseconds();
+ if (diff < 0) {
+ return -1;
+ } else if (diff > 0) {
+ return 1;
+ // Return 0 if diff is 0; return NaN if diff is NaN
+ } else {
+ return diff;
+ }
+}
+
+/**
+ * @name differenceInDays
+ * @category Day Helpers
+ * @summary Get the number of full days between the given dates.
+ *
+ * @description
+ * Get the number of full day periods between two dates. Fractional days are
+ * truncated towards zero.
+ *
+ * One "full day" is the distance between a local time in one day to the same
+ * local time on the next or previous day. A full day can sometimes be less than
+ * or more than 24 hours if a daylight savings change happens between two dates.
+ *
+ * To ignore DST and only measure exact 24-hour periods, use this instead:
+ * `Math.floor(differenceInHours(dateLeft, dateRight)/24)|0`.
+ *
+ *
+ * @param {Date|Number} dateLeft - the later date
+ * @param {Date|Number} dateRight - the earlier date
+ * @returns {Number} the number of full days according to the local timezone
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // How many full days are between
+ * // 2 July 2011 23:00:00 and 2 July 2012 00:00:00?
+ * const result = differenceInDays(
+ * new Date(2012, 6, 2, 0, 0),
+ * new Date(2011, 6, 2, 23, 0)
+ * )
+ * //=> 365
+ * // How many full days are between
+ * // 2 July 2011 23:59:00 and 3 July 2011 00:01:00?
+ * const result = differenceInDays(
+ * new Date(2011, 6, 3, 0, 1),
+ * new Date(2011, 6, 2, 23, 59)
+ * )
+ * //=> 0
+ * // How many full days are between
+ * // 1 March 2020 0:00 and 1 June 2020 0:00 ?
+ * // Note: because local time is used, the
+ * // result will always be 92 days, even in
+ * // time zones where DST starts and the
+ * // period has only 92*24-1 hours.
+ * const result = differenceInDays(
+ * new Date(2020, 5, 1),
+ * new Date(2020, 2, 1)
+ * )
+//=> 92
+ */
+function differenceInDays(dirtyDateLeft, dirtyDateRight) {
+ (0, _index3.default)(2, arguments);
+ var dateLeft = (0, _index.default)(dirtyDateLeft);
+ var dateRight = (0, _index.default)(dirtyDateRight);
+ var sign = compareLocalAsc(dateLeft, dateRight);
+ var difference = Math.abs((0, _index2.default)(dateLeft, dateRight));
+ dateLeft.setDate(dateLeft.getDate() - sign * difference);
+
+ // Math.abs(diff in full days - diff in calendar days) === 1 if last calendar day is not full
+ // If so, result must be decreased by 1 in absolute value
+ var isLastDayNotFull = Number(compareLocalAsc(dateLeft, dateRight) === -sign);
+ var result = sign * (difference - isLastDayNotFull);
+ // Prevent negative zero
+ return result === 0 ? 0 : result;
+}
+module.exports = exports.default; \ No newline at end of file
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