Merge pull request #110 from Loopers-dev-lab/revert-109-revert-86-3round

Revert "Revert "[volume-3] 도메인 모델링 및 구현""

Author: adminhelper

apps/commerce-api/src/main/java/com/loopers/application/example/ExampleFacade.java

@@ -0,0 +1,32 @@
+package com.loopers.application.like;
+
+import com.loopers.domain.like.LikeService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+/**
+ * packageName : com.loopers.application.like
+ * fileName     : LikeFacade
+ * author      : byeonsungmun
+ * date        : 2025. 11. 14.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 14.     byeonsungmun       최초 생성
+ */
+@Component
+@RequiredArgsConstructor
+public class LikeFacade {
+
+    private final LikeService likeService;
+
+    public void createLike(String userId, Long productId) {
+        likeService.like(userId, productId);
+    }
+
+    public void deleteLike(String userId, Long productId) {
+        likeService.unlike(userId, productId);
+    }
+}
+

apps/commerce-api/src/main/java/com/loopers/application/example/ExampleInfo.java

@@ -0,0 +1,19 @@
+package com.loopers.application.order;
+
+import java.util.List;
+
+/**
+ * packageName : com.loopers.application.order
+ * fileName     : CreateOrderCommand
+ * author      : byeonsungmun
+ * date        : 2025. 11. 14.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 14.     byeonsungmun       최초 생성
+ */
+public record CreateOrderCommand(
+        String userId,
+        List<OrderItemCommand> items
+) {}

apps/commerce-api/src/main/java/com/loopers/application/like/LikeFacade.java

@@ -0,0 +1,81 @@
+package com.loopers.application.order;
+
+import com.loopers.domain.order.Order;
+import com.loopers.domain.order.OrderItem;
+import com.loopers.domain.order.OrderService;
+import com.loopers.domain.order.OrderStatus;
+import com.loopers.domain.point.PointService;
+import com.loopers.domain.product.Product;
+import com.loopers.domain.product.ProductService;
+import com.loopers.support.error.CoreException;
+import com.loopers.support.error.ErrorType;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+/**
+ * packageName : com.loopers.application.order
+ * fileName     : OrderFacade
+ * author      : byeonsungmun
+ * date        : 2025. 11. 13.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 13.     byeonsungmun       최초 생성
+ */
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class OrderFacade {
+
+    private final OrderService orderService;
+    private final ProductService productService;
+    private final PointService pointService;
+
+    @Transactional
+    public OrderInfo createOrder(CreateOrderCommand command) {
+
+        if (command == null || command.items() == null || command.items().isEmpty()) {
+            throw new CoreException(ErrorType.BAD_REQUEST, "상품 정보가 비어있습니다");
+        }
+
+        Order order = Order.create(command.userId());
+
+        for (OrderItemCommand itemCommand : command.items()) {
+
+            //상품가져오고
+            Product product = productService.getProduct(itemCommand.productId());
+
+            // 재고감소
+            product.decreaseStock(itemCommand.quantity());
+
+            // OrderItem생성
+            OrderItem orderItem = OrderItem.create(
+                    product.getId(),
+                    product.getName(),
+                    itemCommand.quantity(),
+                    product.getPrice());
+
+            order.addOrderItem(orderItem);
+            orderItem.setOrder(order);
+        }
+
+        //총 가격구하고
+        long totalAmount = order.getOrderItems().stream()
+                .mapToLong(OrderItem::getAmount)
+                .sum();
+
+        order.updateTotalAmount(totalAmount);
+
+        pointService.usePoint(command.userId(), totalAmount);
+
+        //저장
+        Order saved = orderService.createOrder(order);
+        saved.updateStatus(OrderStatus.COMPLETE);
+
+        return OrderInfo.from(saved);
+    }
+}

apps/commerce-api/src/main/java/com/loopers/application/order/CreateOrderCommand.java

@@ -0,0 +1,42 @@
+package com.loopers.application.order;
+
+import com.loopers.domain.order.Order;
+import com.loopers.domain.order.OrderStatus;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * packageName : com.loopers.application.order
+ * fileName     : OrderInfo
+ * author      : byeonsungmun
+ * date        : 2025. 11. 14.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 14.     byeonsungmun       최초 생성
+ */
+public record OrderInfo(
+        Long orderId,
+        String userId,
+        Long totalAmount,
+        OrderStatus status,
+        LocalDateTime createdAt,
+        List<OrderItemInfo> items
+) {
+    public static OrderInfo from(Order order) {
+        List<OrderItemInfo> itemInfos = order.getOrderItems().stream()
+                .map(OrderItemInfo::from)
+                .toList();
+
+        return new OrderInfo(
+                order.getId(),
+                order.getUserId(),
+                order.getTotalAmount(),
+                order.getStatus(),
+                order.getCreatedAt(),
+                itemInfos
+        );
+    }
+}

apps/commerce-api/src/main/java/com/loopers/application/order/OrderFacade.java

@@ -0,0 +1,17 @@
+package com.loopers.application.order;
+
+/**
+ * packageName : com.loopers.application.order
+ * fileName     : OrderItemCommand
+ * author      : byeonsungmun
+ * date        : 2025. 11. 14.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 14.     byeonsungmun       최초 생성
+ */
+public record OrderItemCommand(
+        Long productId,
+        Long quantity
+) {}

apps/commerce-api/src/main/java/com/loopers/application/order/OrderInfo.java

@@ -0,0 +1,32 @@
+package com.loopers.application.order;
+
+import com.loopers.domain.order.OrderItem;
+
+/**
+ * packageName : com.loopers.application.order
+ * fileName     : OrderInfo
+ * author      : byeonsungmun
+ * date        : 2025. 11. 13.
+ * description :
+ * ===========================================
+ * DATE         AUTHOR       NOTE
+ * -------------------------------------------
+ * 2025. 11. 13.     byeonsungmun       최초 생성
+ */
+public record OrderItemInfo(
+        Long productId,
+        String productName,
+        Long quantity,
+        Long price,
+        Long amount
+) {
+    public static OrderItemInfo from(OrderItem item) {
+        return new OrderItemInfo(
+                item.getProductId(),
+                item.getProductName(),
+                item.getQuantity(),
+                item.getPrice(),
+                item.getAmount()
+        );
+    }
+}

apps/commerce-api/src/main/java/com/loopers/application/order/OrderItemCommand.java

@@ -0,0 +1,28 @@
+package com.loopers.application.point;
+
+import com.loopers.domain.point.Point;
+import com.loopers.domain.point.PointService;
+import com.loopers.interfaces.api.point.PointV1Dto;
+import com.loopers.support.error.CoreException;
+import com.loopers.support.error.ErrorType;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@RequiredArgsConstructor
+@Component
+public class PointFacade {
+    private final PointService pointService;
+
+    public PointInfo getPoint(String userId) {
+        Point point = pointService.findPointByUserId(userId);
+
+        if (point == null) {
+            throw new CoreException(ErrorType.NOT_FOUND, "사용자 존재하지 않습니다.");
+        }
+        return PointInfo.from(point);
+    }
+
+    public PointInfo chargePoint(PointV1Dto.ChargePointRequest request) {
+        return PointInfo.from(pointService.chargePoint(request.userId(), request.chargeAmount()));
+    }
+}

apps/commerce-api/src/main/java/com/loopers/application/order/OrderItemInfo.java

@@ -0,0 +1,13 @@
+package com.loopers.application.point;
+
+import com.loopers.domain.point.Point;
+
+public record PointInfo(String userId, Long amount) {
+    public static PointInfo from(Point info) {
+        return new PointInfo(
+                info.getUserId(),
+                info.getBalance()
+        );
+    }
+
+}