completed mappers

orders-backend/src/main/java/com/andwati/orders/mappers/InventoryMapper.java

@@ -0,0 +1,22 @@
+package com.andwati.orders.mappers;
+
+import com.andwati.orders.dto.response.InventoryItemResponse;
+import com.andwati.orders.model.InventoryItem;
+import org.springframework.stereotype.Component;
+
+@Component
+public class InventoryMapper {
+
+    public InventoryItemResponse toResponse(InventoryItem inventoryItem) {
+        return new InventoryItemResponse(
+                inventoryItem.getProduct().getId(),
+                inventoryItem.getProduct().getName(),
+                inventoryItem.getProduct().getSku(),
+                inventoryItem.getAvailableQuantity(),
+                inventoryItem.getReservedQuantity(),
+                inventoryItem.getReorderLevel(),
+                inventoryItem.getStatus(),
+                inventoryItem.getUpdatedAt()
+        );
+    }
+}

orders-backend/src/main/java/com/andwati/orders/mappers/OrderMapper.java

@@ -0,0 +1,63 @@
+package com.andwati.orders.mappers;
+
+import com.andwati.orders.dto.response.CancelOrderResponse;
+import com.andwati.orders.dto.response.OrderItemResponse;
+import com.andwati.orders.dto.response.OrderResponse;
+import com.andwati.orders.dto.response.OrderSummaryResponse;
+import com.andwati.orders.model.Order;
+import com.andwati.orders.model.OrderItem;
+import org.springframework.stereotype.Component;
+
+@Component
+public class OrderMapper {
+
+    public OrderResponse toResponse(Order order) {
+        return new OrderResponse(
+                order.getId(),
+                order.getCustomerName(),
+                order.getStatus(),
+                order.getItems().stream().map(this::toItemResponse).toList(),
+                order.getTotalAmount(),
+                order.getCurrency(),
+                order.getCreatedAt(),
+                order.getCancelledAt()
+        );
+    }
+
+    public OrderSummaryResponse toSummaryResponse(Order order) {
+        int itemCount = order.getItems()
+                .stream()
+                .mapToInt(OrderItem::getQuantity)
+                .sum();
+
+        return new OrderSummaryResponse(
+                order.getId(),
+                order.getCustomerName(),
+                order.getStatus(),
+                order.getTotalAmount(),
+                order.getCurrency(),
+                itemCount,
+                order.getCreatedAt(),
+                order.getCancelledAt()
+        );
+    }
+
+    public CancelOrderResponse toCancelResponse(Order order) {
+        return new CancelOrderResponse(
+                order.getId(),
+                order.getStatus(),
+                order.getCancelledAt(),
+                true
+        );
+    }
+
+    private OrderItemResponse toItemResponse(OrderItem item) {
+        return new OrderItemResponse(
+                item.getProduct().getId(),
+                item.getProductName(),
+                item.getQuantity(),
+                item.getUnitPrice(),
+                item.getLineTotal()
+        );
+    }
+}