refactor: Money 값객체 생성 및 적용 (#115)

src/main/kotlin/com/petqua/application/cart/CartProductService.kt

@@ -4,6 +4,7 @@ import com.petqua.application.cart.dto.CartProductWithSupportedOptionResponse
 import com.petqua.application.cart.dto.DeleteCartProductCommand
 import com.petqua.application.cart.dto.SaveCartProductCommand
 import com.petqua.application.cart.dto.UpdateCartProductOptionCommand
+import com.petqua.common.domain.Money
 import com.petqua.common.domain.existByIdOrThrow
 import com.petqua.common.domain.findByIdOrThrow
 import com.petqua.common.util.throwExceptionWhen
@@ -27,7 +28,6 @@ import com.petqua.exception.product.ProductException
 import com.petqua.exception.product.ProductExceptionType.NOT_FOUND_PRODUCT
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
-import java.math.BigDecimal
 
 @Transactional
 @Service
@@ -86,7 +86,7 @@ class CartProductService(
         )
     }
 
-    private fun validateDeliveryFee(product: Product, deliveryMethod: DeliveryMethod, deliveryFee: BigDecimal) {
+    private fun validateDeliveryFee(product: Product, deliveryMethod: DeliveryMethod, deliveryFee: Money) {
         product.getDeliveryFee(deliveryMethod)
             .also { throwExceptionWhen(it != deliveryFee) { CartProductException(DIFFERENT_DELIVERY_FEE) } }
     }

src/main/kotlin/com/petqua/application/cart/dto/CartProductDtos.kt

@@ -1,5 +1,6 @@
 package com.petqua.application.cart.dto
 
+import com.petqua.common.domain.Money
 import com.petqua.domain.cart.CartProduct
 import com.petqua.domain.cart.CartProductQuantity
 import com.petqua.domain.delivery.DeliveryMethod
@@ -14,7 +15,7 @@ data class SaveCartProductCommand(
     val quantity: Int,
     val sex: Sex,
     val deliveryMethod: DeliveryMethod,
-    val deliveryFee: BigDecimal,
+    val deliveryFee: Money,
 ) {
     fun toCartProduct(): CartProduct {
         return CartProduct(
@@ -23,7 +24,7 @@ data class SaveCartProductCommand(
             quantity = CartProductQuantity(quantity),
             sex = sex,
             deliveryMethod = deliveryMethod,
-            deliveryFee = deliveryFee.setScale(2),
+            deliveryFee = deliveryFee,
         )
     }
 }
@@ -35,7 +36,7 @@ data class UpdateCartProductOptionCommand(
     val quantity: CartProductQuantity,
     val sex: Sex,
     val deliveryMethod: DeliveryMethod,
-    val deliveryFee: BigDecimal,
+    val deliveryFee: Money,
 )
 
 data class DeleteCartProductCommand(
@@ -78,7 +79,7 @@ data class CartProductWithSupportedOptionResponse(
         description = "상품 가격",
         example = "30000"
     )
-    val productPrice: Int,
+    val productPrice: Money,
 
     @Schema(
         description = "가격 할인율",
@@ -90,7 +91,7 @@ data class CartProductWithSupportedOptionResponse(
         description = "할인 가격(판매 가격)",
         example = "21000"
     )
-    val productDiscountPrice: Int,
+    val productDiscountPrice: Money,
 
     @Schema(
         description = "봉달(장바구니) 수량",
@@ -116,7 +117,7 @@ data class CartProductWithSupportedOptionResponse(
         description = "배송비",
         example = "3000"
     )
-    val deliveryFee: BigDecimal,
+    val deliveryFee: Money,
 
     @Schema(
         description = "판매 여부(품절 및 삭제 확인)",
@@ -129,37 +130,37 @@ data class CartProductWithSupportedOptionResponse(
         description = "안전 배송 가격 (null인 경우 지원 X)",
         example = "5000"
     )
-    val safeDeliveryFee: BigDecimal?,
+    val safeDeliveryFee: Money?,
 
     @Schema(
         description = "일반 배송 가격 (null인 경우 지원 X)",
         example = "3000"
     )
-    val commonDeliveryFee: BigDecimal?,
+    val commonDeliveryFee: Money?,
 
     @Schema(
         description = "픽업 배송 가격 (null인 경우 지원 X)",
         example = "0"
     )
-    val pickUpDeliveryFee: BigDecimal?,
+    val pickUpDeliveryFee: Money?,
 
     @Schema(
         description = "수컷 추가 가격 (null인 경우 지원 X)",
         example = "1000"
     )
-    val maleAdditionalPrice: BigDecimal?,
+    val maleAdditionalPrice: Money?,
 
     @Schema(
         description = "암컷 추가 가격 (null인 경우 지원 X)",
         example = "1000"
     )
-    val femaleAdditionalPrice: BigDecimal?,
+    val femaleAdditionalPrice: Money?,
 ) {
 
     constructor(
         cartProductResponse: CartProductResponse,
-        maleAdditionalPrice: BigDecimal?,
-        femaleAdditionalPrice: BigDecimal?,
+        maleAdditionalPrice: Money?,
+        femaleAdditionalPrice: Money?,
     ) : this(
         id = cartProductResponse.id,
         storeName = cartProductResponse.storeName,
@@ -188,17 +189,17 @@ data class CartProductResponse(
     val productId: Long,
     val productName: String,
     val productThumbnailUrl: String,
-    val productPrice: Int,
+    val productPrice: Money,
     val productDiscountRate: Int,
-    val productDiscountPrice: Int,
+    val productDiscountPrice: Money,
     val quantity: Int,
     val sex: Sex,
     val deliveryMethod: String,
-    val deliveryFee: BigDecimal,
+    val deliveryFee: Money,
     val isOnSale: Boolean,
-    val safeDeliveryFee: BigDecimal?,
-    val commonDeliveryFee: BigDecimal?,
-    val pickUpDeliveryFee: BigDecimal?,
+    val safeDeliveryFee: Money?,
+    val commonDeliveryFee: Money?,
+    val pickUpDeliveryFee: Money?,
 ) {
 
     constructor(
@@ -211,9 +212,9 @@ data class CartProductResponse(
         productId = product?.id ?: 0L,
         productName = product?.name ?: "",
         productThumbnailUrl = product?.thumbnailUrl ?: "",
-        productPrice = product?.price?.intValueExact() ?: 0,
+        productPrice = product?.price ?: Money.from(BigDecimal.ZERO),
         productDiscountRate = product?.discountRate ?: 0,
-        productDiscountPrice = product?.discountPrice?.intValueExact() ?: 0,
+        productDiscountPrice = product?.discountPrice ?: Money.from(BigDecimal.ZERO),
         quantity = cartProduct.quantity.value,
         sex = cartProduct.sex,
         deliveryMethod = cartProduct.deliveryMethod.name,

src/main/kotlin/com/petqua/application/order/OrderService.kt

@@ -3,6 +3,7 @@ package com.petqua.application.order
 import com.petqua.application.order.dto.SaveOrderCommand
 import com.petqua.application.order.dto.SaveOrderResponse
 import com.petqua.application.payment.infra.PaymentGatewayClient
+import com.petqua.common.domain.Money
 import com.petqua.common.domain.findByIdOrThrow
 import com.petqua.common.util.throwExceptionWhen
 import com.petqua.domain.order.Order
@@ -70,8 +71,8 @@ class OrderService(
                 ?: throw ProductException(INVALID_PRODUCT_OPTION)
 
             throwExceptionWhen(
-                productCommand.orderPrice.setScale(2) != (product.discountPrice + productOption.additionalPrice) * productCommand.quantity.toBigDecimal()
-                        || productCommand.deliveryFee.setScale(2) != product.getDeliveryFee(productCommand.deliveryMethod)
+                productCommand.orderPrice != (product.discountPrice + productOption.additionalPrice) * productCommand.quantity.toBigDecimal()
+                        || productCommand.deliveryFee != product.getDeliveryFee(productCommand.deliveryMethod)
             ) {
                 OrderException(
                     ORDER_PRICE_NOT_MATCH
@@ -89,11 +90,11 @@ class OrderService(
         }
         val orderDeliveryFee = groupBy.map { (storeDeliveryMethod, products) ->
             val deliveryMethod = storeDeliveryMethod.second
-            products.first().getDeliveryFee(deliveryMethod).toInt()
+            products.first().getDeliveryFee(deliveryMethod).value.toInt() // TODO int로 바꾼 이유?
         }.sum()
 
         // 4. 총 결제 금액 검증
-        throwExceptionWhen(command.totalAmount != orderDeliveryFee.toBigDecimal() + command.orderProductCommands.sumOf { it.orderPrice }) {
+        throwExceptionWhen(command.totalAmount != Money.from(orderDeliveryFee.toBigDecimal() + command.orderProductCommands.sumOf { it.orderPrice.value })) {
             OrderException(
                 ORDER_PRICE_NOT_MATCH
             )

src/main/kotlin/com/petqua/application/order/dto/OrderDtos.kt

@@ -1,39 +1,39 @@
 package com.petqua.application.order.dto
 
+import com.petqua.common.domain.Money
 import com.petqua.domain.delivery.DeliveryMethod
 import com.petqua.domain.order.OrderProduct
 import com.petqua.domain.order.ShippingNumber
 import com.petqua.domain.product.Product
 import com.petqua.domain.product.option.ProductOption
 import com.petqua.domain.product.option.Sex
-import java.math.BigDecimal
 
 data class SaveOrderCommand(
     val memberId: Long,
     val shippingAddressId: Long,
     val shippingRequest: String?,
     val orderProductCommands: List<OrderProductCommand>,
-    val totalAmount: BigDecimal,
+    val totalAmount: Money,
 )
 
 data class OrderProductCommand(
     val productId: Long,
     val quantity: Int,
-    val originalPrice: BigDecimal,
+    val originalPrice: Money,
     val discountRate: Int,
-    val discountPrice: BigDecimal,
-    val orderPrice: BigDecimal,
+    val discountPrice: Money,
+    val orderPrice: Money,
     val sex: Sex,
-    val additionalPrice: BigDecimal,
-    val deliveryFee: BigDecimal,
+    val additionalPrice: Money,
+    val deliveryFee: Money,
     val deliveryMethod: DeliveryMethod,
 ) {
 
     fun toProductOption(): ProductOption {
         return ProductOption(
             sex = sex,
             productId = productId,
-            additionalPrice = additionalPrice.setScale(2),
+            additionalPrice = additionalPrice,
         )
     }
 
@@ -44,12 +44,12 @@ data class OrderProductCommand(
     ): OrderProduct {
         return OrderProduct(
             quantity = quantity,
-            originalPrice = originalPrice.setScale(2),
+            originalPrice = originalPrice,
             discountRate = discountRate,
-            discountPrice = discountPrice.setScale(2),
-            deliveryFee = deliveryFee.setScale(2),
+            discountPrice = discountPrice,
+            deliveryFee = deliveryFee,
             shippingNumber = shippingNumber,
-            orderPrice = orderPrice.setScale(2),
+            orderPrice = orderPrice,
             productId = productId,
             productName = product.name,
             thumbnailUrl = product.thumbnailUrl,

src/main/kotlin/com/petqua/application/payment/PaymentDtos.kt

@@ -1,18 +1,18 @@
 package com.petqua.application.payment
 
+import com.petqua.common.domain.Money
 import com.petqua.domain.order.OrderNumber
 import com.petqua.domain.payment.tosspayment.TossPaymentType
 import com.petqua.exception.payment.FailPaymentCode
 import com.petqua.exception.payment.FailPaymentException
 import com.petqua.exception.payment.FailPaymentExceptionType.ORDER_NUMBER_MISSING_EXCEPTION
-import java.math.BigDecimal
 
 data class SucceedPaymentCommand(
     val memberId: Long,
     val paymentType: TossPaymentType,
     val orderNumber: OrderNumber,
     val paymentKey: String,
-    val amount: BigDecimal,
+    val amount: Money,
 ) {
     fun toPaymentConfirmRequest(): PaymentConfirmRequestToPG {
         return PaymentConfirmRequestToPG(
@@ -28,7 +28,7 @@ data class SucceedPaymentCommand(
             paymentType: String,
             orderId: String,
             paymentKey: String,
-            amount: BigDecimal,
+            amount: Money,
         ): SucceedPaymentCommand {
             return SucceedPaymentCommand(
                 memberId = memberId,