feat(product-gift): create 流程注入赠品校验与 product_order_gifts 记录

cfc-backend/src/main/java/com/etotem/cfc/dto/CreateProductOrderDTO.java

@@ -20,6 +20,11 @@ public class CreateProductOrderDTO {
     private Long consigneeId;         // 收货人ID
     private Map<String, String> purchaseInfo; // 购买信息(字段key→值)
 
+    private List<Long> giftItemIds; // 选中的赠品项ID列表（来自 product_gift_items.id）
+
+    public List<Long> getGiftItemIds() { return giftItemIds; }
+    public void setGiftItemIds(List<Long> giftItemIds) { this.giftItemIds = giftItemIds; }
+
     // 配送与履约扩展
     private Long pickupLocationId;      // 自取地点ID
     private Long timeSlotId;             // 时间段ID(自取/线上)

cfc-backend/src/main/java/com/etotem/cfc/service/ProductOrderService.java

@@ -47,6 +47,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 import com.etotem.cfc.dto.ChildInfoDTO;
+import com.etotem.cfc.dto.GiftConfigVO;
+import com.etotem.cfc.dto.MembershipLevelDTO;
 import com.etotem.cfc.service.EnergyService;
 import com.etotem.cfc.service.UnlockGateService;
 import com.etotem.cfc.service.UserService;
@@ -54,6 +56,10 @@ import com.alibaba.fastjson.JSON;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import com.etotem.cfc.util.SortUtil;
+import com.etotem.cfc.entity.ProductGiftItem;
+import com.etotem.cfc.entity.ProductOrderGift;
+import com.etotem.cfc.mapper.ProductOrderGiftMapper;
+import java.util.Set;
 
 @Service
 public class ProductOrderService {
@@ -159,11 +165,22 @@ public class ProductOrderService {
     @Resource
     private com.etotem.cfc.mapper.ConsigneeMapper consigneeMapper;
 
+    @Resource
+    private ProductOrderGiftMapper productOrderGiftMapper;
+
+    @Resource
+    private ProductGiftService productGiftService;
+
     public Result<ProductOrderDTO> create(CreateProductOrderDTO dto, Long buyerId) {
         if (buyerId == null) {
             return Result.error("请先登录");
         }
 
+        if (dto.getItems() != null && !dto.getItems().isEmpty()
+                && dto.getGiftItemIds() != null && !dto.getGiftItemIds().isEmpty()) {
+            return Result.error("赠品仅支持单商品下单");
+        }
+
         if (dto.getItems() != null && !dto.getItems().isEmpty()) {
             return createMultiItem(dto, buyerId);
         }
@@ -248,6 +265,46 @@ public class ProductOrderService {
         order.setCreatedAt(new Date());
         order.setUpdatedAt(new Date());
         orderMapper.insert(order);
+        // ===== 赠品校验与记录 =====
+        if (dto.getGiftItemIds() != null && !dto.getGiftItemIds().isEmpty()) {
+            MembershipLevelDTO currentLevel = order.getFamilyId() != null
+                    ? membershipService.getCurrentLevel(order.getFamilyId())
+                    : null;
+            String userLevel = currentLevel != null ? currentLevel.getLevelCode() : null;
+            if (userLevel == null || "FREE".equals(userLevel)) {
+                return Result.error("您暂无会员等级，无法享受赠品");
+            }
+            List<GiftConfigVO> activeConfigs = productGiftService.getActiveConfigsByProductAndLevel(
+                    product.getId(), userLevel);
+            if (activeConfigs.isEmpty()) {
+                return Result.error("您所在等级暂无该商品赠品");
+            }
+            Set<Long> allowedItemIds = activeConfigs.stream()
+                    .flatMap(c -> c.getItems().stream())
+                    .map(GiftConfigVO.GiftItemVO::getId)
+                    .collect(Collectors.toSet());
+            for (Long itemId : dto.getGiftItemIds()) {
+                if (!allowedItemIds.contains(itemId)) {
+                    return Result.error("赠品项不存在或超出权限");
+                }
+                ProductGiftItem giftItem = productGiftService.getActiveItemById(itemId);
+                if (giftItem == null) {
+                    return Result.error("赠品项不存在");
+                }
+                ProductOrderGift orderGift = new ProductOrderGift();
+                orderGift.setOrderId(order.getId());
+                orderGift.setOrderNo(order.getOrderNo());
+                orderGift.setGiftType(giftItem.getGiftType());
+                orderGift.setGiftProductId(giftItem.getGiftProductId());
+                orderGift.setGiftProductName(giftItem.getGiftProductName());
+                orderGift.setGiftProductImage(giftItem.getGiftProductImage());
+                orderGift.setCfValue(giftItem.getCfValue() != null ? giftItem.getCfValue() : 0);
+                orderGift.setQuantity(1);
+                orderGift.setFulfilled(0);
+                orderGift.setCreatedAt(new Date());
+                productOrderGiftMapper.insert(orderGift);
+            }
+        }
         return Result.success(ProductOrderDTO.from(order));
     }