roomescape-refactored/frontend/src/util/DateTimeFormatter.ts

export const formatDate = (dateStr: string) => {
    const date = new Date(dateStr);
    const currentYear = new Date().getFullYear();
    const reservationYear = date.getFullYear();

    const days = ['일', '월', '화', '수', '목', '금', '토'];
    const dayOfWeek = days[date.getDay()];
    const month = date.getMonth() + 1;
    const day = date.getDate();

    let datePart = '';
    if (currentYear === reservationYear) {
        datePart = `${month}월 ${day}일(${dayOfWeek})`;
    } else {
        datePart = `${reservationYear}년 ${month}월 ${day}일(${dayOfWeek})`;
    }

    return datePart;
};

export const formatTime = (timeStr: string) => {
    const [hourStr, minuteStr] = timeStr.split(':');
    let hours = parseInt(hourStr, 10);
    const minutes = parseInt(minuteStr, 10);
    const ampm = hours >= 12 ? '오후' : '오전';
    hours = hours % 12;
    hours = hours ? hours : 12;

    let timePart = `${ampm} ${hours}시`;
    if (minutes !== 0) {
        timePart += ` ${minutes}분`;
    }

    return timePart;
}