【缺陷修复】商城：修复积分不够还能兑换商品的 bug

yudao-module-mall/yudao-module-trade-api/src/main/java/cn/iocoder/yudao/module/trade/enums/ErrorCodeConstants.java

@@ -37,6 +37,7 @@ public interface ErrorCodeConstants {
     ErrorCode ORDER_CREATE_FAIL_EXIST_UNPAID = new ErrorCode(1_011_000_032, "交易订单创建失败，原因：存在未付款订单");
     ErrorCode ORDER_CANCEL_PAID_FAIL = new ErrorCode(1_011_000_033, "交易订单取消支付失败，原因：订单不是【{}】状态");
     ErrorCode ORDER_PICK_UP_FAIL_NOT_VERIFY_USER = new ErrorCode(1_011_000_034, "交易订单自提失败，原因：你没有核销该门店订单的权限");
+    ErrorCode ORDER_CREATE_FAIL_INSUFFICIENT_USER_POINTS = new ErrorCode(1_011_000_035, "交易订单创建失败，原因：用户积分不足");
 
     // ========== After Sale 模块 1-011-000-100 ==========
     ErrorCode AFTER_SALE_NOT_FOUND = new ErrorCode(1_011_000_100, "售后单不存在");

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/order/handler/TradePointOrderHandler.java

@@ -2,6 +2,8 @@ package cn.iocoder.yudao.module.trade.service.order.handler;
 
 import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.lang.Assert;
+import cn.iocoder.yudao.module.member.api.user.MemberUserApi;
+import cn.iocoder.yudao.module.member.api.user.dto.MemberUserRespDTO;
 import cn.iocoder.yudao.module.promotion.api.point.PointActivityApi;
 import cn.iocoder.yudao.module.trade.dal.dataobject.order.TradeOrderDO;
 import cn.iocoder.yudao.module.trade.dal.dataobject.order.TradeOrderItemDO;
@@ -13,6 +15,9 @@ import org.springframework.stereotype.Component;
 import java.util.List;
 import java.util.Objects;
 
+import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
+import static cn.iocoder.yudao.module.trade.enums.ErrorCodeConstants.ORDER_CREATE_FAIL_INSUFFICIENT_USER_POINTS;
+
 /**
  * 积分商城活动订单的 {@link TradeOrderHandler} 实现类
  *
@@ -23,6 +28,8 @@ public class TradePointOrderHandler implements TradeOrderHandler {
 
     @Resource
     private PointActivityApi pointActivityApi;
+    @Resource
+    private MemberUserApi memberUserApi;
 
     @Override
     public void beforeOrderCreate(TradeOrderDO order, List<TradeOrderItemDO> orderItems) {
@@ -31,6 +38,11 @@ public class TradePointOrderHandler implements TradeOrderHandler {
         }
         // 明确校验一下
         Assert.isTrue(orderItems.size() == 1, "积分商城活动兑换商品兑换时，只允许选择一个商品");
+        // 校验用户剩余积分是否足够兑换商品
+        MemberUserRespDTO user = memberUserApi.getUser(order.getUserId());
+        if (user.getPoint() < order.getUsePoint()) {
+            throw exception(ORDER_CREATE_FAIL_INSUFFICIENT_USER_POINTS);
+        }
 
         // 扣减积分商城活动的库存
         pointActivityApi.updatePointStockDecr(order.getPointActivityId(),

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/price/calculator/TradePointActivityPriceCalculator.java

@@ -60,21 +60,21 @@ public class TradePointActivityPriceCalculator implements TradePriceCalculator {
                 param.getUserId(), param.getPointActivityId(),
                 orderItem.getSkuId(), orderItem.getCount());
 
+        // 3.0 积分兑换前置校验
+        Assert.isTrue(activity.getPoint() >= 1, "积分商城商品兑换积分必须大于 1");
         // 3.1 记录优惠明细
+        int usePoint = activity.getPoint() * orderItem.getCount();
+        result.setUsePoint(usePoint);
+        orderItem.setUsePoint(usePoint);
         int discountPrice = orderItem.getPayPrice(); // 情况一：单使用积分兑换
-        Assert.isTrue(activity.getPoint() >= 1, "积分商城商品兑换积分必须大于 1");
-        result.setUsePoint(activity.getPoint() * orderItem.getCount());
-        orderItem.setUsePoint(activity.getPoint() * orderItem.getCount());
         if (activity.getPrice() != null && activity.getPrice() > 0) { // 情况二：积分 + 金额
             discountPrice = orderItem.getPayPrice() - activity.getPrice() * orderItem.getCount();
         }
-        // 3.2 记录优惠明细
         TradePriceCalculatorHelper.addPromotion(result, orderItem,
                 param.getPointActivityId(), "积分商城活动", PromotionTypeEnum.POINT.getType(),
                 StrUtil.format("积分商城活动：省 {} 元", TradePriceCalculatorHelper.formatPrice(discountPrice)),
                 discountPrice);
-
-        // 3.3 更新 SKU 优惠金额
+        // 3.2 更新 SKU 优惠金额
         orderItem.setDiscountPrice(orderItem.getDiscountPrice() + discountPrice);
         TradePriceCalculatorHelper.recountPayPrice(orderItem);
         TradePriceCalculatorHelper.recountAllPrice(result);