feat: 요리 완료 상태로 변경하는 service 메서드 구현

src/main/java/com/ray/pominowner/orders/service/OrderService.java

@@ -4,9 +4,9 @@
 import com.ray.pominowner.orders.domain.OrderStatus;
 import com.ray.pominowner.orders.repository.OrderRepository;
 import com.ray.pominowner.payment.service.PaymentService;
-import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalTime;
 import java.util.List;
@@ -34,6 +34,7 @@ public Order approve(Long orderId) {
                 OrderStatus.COOKING,
                 generator.incrementAndGet(),
                 LocalTime.now().plusMinutes(15));
+
         orderRepository.save(approvedOrder);
 
         return approvedOrder;
@@ -53,6 +54,17 @@ public Order reject(Long orderId) {
         return rejectedOrder;
     }
 
+    public Order finishCooking(Long orderId) {
+        Order order = orderRepository.findById(orderId).orElseThrow(
+                () -> new IllegalArgumentException("해당하는 주문이 없습니다"));
+
+        Order readyOrder = Order.of(order, OrderStatus.READY);
+
+        orderRepository.save(readyOrder);
+
+        return readyOrder;
+    }
+
     public List<Order> getTodayOrders(Long storeId) {
         List<Order> storeOrders = orderRepository.findAllByStoreId(storeId);