28 lines
1.1 KiB
JavaScript
28 lines
1.1 KiB
JavaScript
"use strict";
|
|
Object.defineProperty(exports, "__esModule", { value: true });
|
|
exports.addMonths = addMonths;
|
|
const daysInMonth_js_1 = require("../utils/daysInMonth.js");
|
|
const index_js_1 = require("../utils/index.js");
|
|
/**
|
|
* Adds the specified number of months to the given Ethiopian date. Handles
|
|
* month overflow and year boundaries correctly.
|
|
*
|
|
* @param date - The starting gregorian date
|
|
* @param amount - The number of months to add (can be negative)
|
|
* @returns A new gregorian date with the months added
|
|
*/
|
|
function addMonths(date, amount) {
|
|
const { year, month, day } = (0, index_js_1.toEthiopicDate)(date);
|
|
let newMonth = month + amount;
|
|
const yearAdjustment = Math.floor((newMonth - 1) / 13);
|
|
newMonth = ((newMonth - 1) % 13) + 1;
|
|
if (newMonth < 1) {
|
|
newMonth += 13;
|
|
}
|
|
const newYear = year + yearAdjustment;
|
|
// Adjust day if it exceeds the month length
|
|
const monthLength = (0, daysInMonth_js_1.daysInMonth)(newMonth, newYear);
|
|
const newDay = Math.min(day, monthLength);
|
|
return (0, index_js_1.toGregorianDate)({ year: newYear, month: newMonth, day: newDay });
|
|
}
|