simrsx-fe/app/lib/date.ts

export function getAge(dateString: string, comparedDate?: string): { idFormat: string; extFormat: string } {
	const birthDate = new Date(dateString);
	const today = new Date();

	if (comparedDate) {
		const comparedDateObj = new Date(comparedDate);
		today.setFullYear(comparedDateObj.getFullYear());
		today.setMonth(comparedDateObj.getMonth());
		today.setDate(comparedDateObj.getDate());
	}

	// Format the date part
	const options: Intl.DateTimeFormatOptions = { day: 'numeric', month: 'long', year: 'numeric' };
	const idFormat = birthDate.toLocaleDateString('id-ID', options);

	// Calculate age
	let years = today.getFullYear() - birthDate.getFullYear();
	let months = today.getMonth() - birthDate.getMonth();
	let days = today.getDate() - birthDate.getDate();

	if (months < 0 || (months === 0 && days < 0)) {
		years--;
		months += 12;
	}

	if (days < 0) {
		const prevMonth = new Date(today.getFullYear(), today.getMonth() - 1, 0);
		days += prevMonth.getDate();
		months--;
	}

	// Format the age part
	let extFormat = '';
	if ([years, months, days].filter(Boolean).join(' ')) {
		extFormat = `${years} Tahun ${months} Bulan ${days} Hari`;
	} else {
		extFormat = '0';
	}

	return {
		idFormat,
		extFormat
	};
}

export function formatDateYyyyMmDd(isoDateString: string): string {
	const date = new Date(isoDateString);
	const year = date.getFullYear();
	const month = String(date.getMonth() + 1).padStart(2, '0');
	const day = String(date.getDate()).padStart(2, '0');
	return `${year}-${month}-${day}`;
}