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"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = compareDesc;
var _index = _interopRequireDefault(require("../toDate/index.js"));
var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
/**
* @name compareDesc
* @category Common Helpers
* @summary Compare the two dates reverse chronologically and return -1, 0 or 1.
*
* @description
* Compare the two dates and return -1 if the first date is after the second,
* 1 if the first date is before the second or 0 if dates are equal.
*
* @param {Date|Number} dateLeft - the first date to compare
* @param {Date|Number} dateRight - the second date to compare
* @returns {Number} the result of the comparison
* @throws {TypeError} 2 arguments required
*
* @example
* // Compare 11 February 1987 and 10 July 1989 reverse chronologically:
* const result = compareDesc(new Date(1987, 1, 11), new Date(1989, 6, 10))
* //=> 1
*
* @example
* // Sort the array of dates in reverse chronological order:
* const result = [
* new Date(1995, 6, 2),
* new Date(1987, 1, 11),
* new Date(1989, 6, 10)
* ].sort(compareDesc)
* //=> [
* // Sun Jul 02 1995 00:00:00,
* // Mon Jul 10 1989 00:00:00,
* // Wed Feb 11 1987 00:00:00
* // ]
*/
function compareDesc(dirtyDateLeft, dirtyDateRight) {
(0, _index2.default)(2, arguments);
var dateLeft = (0, _index.default)(dirtyDateLeft);
var dateRight = (0, _index.default)(dirtyDateRight);
var diff = dateLeft.getTime() - dateRight.getTime();
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;
}
}
module.exports = exports.default;
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