refactor(ReservationService): timeId를 통해 time과 맵핑하는 코드 추가

src/main/java/roomescape/model/reservation/ReservationService.java

@@ -34,7 +34,8 @@ public Reservation addReservation(ReservationRequest reservationRequest) {
             throw new InvalidReservationParameterException("예약 내용에 누락된 부분이 있습니다.");
         }
 
-        Time time = reservationRequest.getTime();
+        Long timeId = reservationRequest.getTime();
+        Time time = findTimeById(timeId);
 
         Reservation reservation = new Reservation(
                 reservationRequest.getName(),
@@ -60,6 +61,14 @@ public Reservation addReservation(ReservationRequest reservationRequest) {
         return reservation;
     }
 
+    private Time findTimeById(Long timeId) {
+        String sql = "SELECT id, time FROM time WHERE id = ?";
+        return jdbcTemplate.queryForObject(sql, (rs, rowNum) -> new Time(
+                rs.getLong("id"),
+                rs.getString("time")
+        ), timeId);
+    }
+
     public void deleteReservation(Long id) {
         int rowAffected = reservationRepository.deleteById(id);
         if (rowAffected == 0) {

src/main/java/roomescape/model/time/Time.java

@@ -16,6 +16,11 @@ public Time(@JsonProperty("time") String time) {
         this.time = time;
     }
 
+    public Time(Long id, String time) {
+        this.id = id;
+        this.time = time;
+    }
+
     public Long getId() {
         return id;
     }