ethiopic-js/dist/calendar/EthiopicCalendar.js

Converts Ethiopian calendar dates into Gregorian and vice versa.

"use strict";

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _BaseCalendars = require("./BaseCalendars");

var _Constants = require("./Constants");

var _Astro = require("./Astro");

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var EthiopicCalendar = function (_YearMonthCalendar) {
    _inherits(EthiopicCalendar, _YearMonthCalendar);

    function EthiopicCalendar(jdn, year, month, day) {
        _classCallCheck(this, EthiopicCalendar);

        return _possibleConstructorReturn(this, (EthiopicCalendar.__proto__ || Object.getPrototypeOf(EthiopicCalendar)).call(this, jdn, year, month, day));
    }

    _createClass(EthiopicCalendar, [{
        key: "toArray",
        value: function toArray() {
            return [this.year, this.month, this.day];
        }
    }], [{
        key: "fromJdn",
        value: function fromJdn(jdn) {
            var year = Math.floor((4 * (jdn - _Constants.ethiopic.EPOCH) + 1463) / 1461);
            var month = 1 + Math.floor((jdn - EthiopicCalendar.toJdn(year, 1, 1)) / 30);
            var day = jdn + 1 - EthiopicCalendar.toJdn(year, month, 1);

            return new EthiopicCalendar(jdn, year, month, day);
        }
    }, {
        key: "toJdn",
        value: function toJdn(year, month, day) {
            EthiopicCalendar.validate(year, month, day);

            return _Constants.ethiopic.EPOCH - 1 + 365 * (year - 1) + Math.floor(year / 4) + 30 * (month - 1) + day;
        }
    }, {
        key: "isLeapYear",
        value: function isLeapYear(year) {
            return (0, _Astro.mod)(year, 4) === 0;
        }
    }, {
        key: "validate",
        value: function validate(year, month, day) {
            if (month < 1 || month > 13) {
                throw new _BaseCalendars.CalendarValidationException('Invalid month');
            }

            var maxDaysOfMonth13 = EthiopicCalendar.isLeapYear(year) ? 6 : 5;
            if (month === 13 && day > maxDaysOfMonth13) {
                throw new _BaseCalendars.CalendarValidationException('Invalid day');
            }

            if (day < 1 || day > 30) {
                throw new _BaseCalendars.CalendarValidationException('Invalid day');
            }
        }
    }]);

    return EthiopicCalendar;
}(_BaseCalendars.YearMonthCalendar);

exports.default = EthiopicCalendar;