fix: 优惠券使用逻辑修改

eladmin-system/src/main/java/cn/ysk/cashier/dto/order/OrderCouponInfoDTO.java

@@ -17,4 +17,5 @@ public class OrderCouponInfoDTO {
     private HashMap<Integer, TbUserCouponVo> fullReductionCouponMap = new HashMap<>();
     // 商品优惠券
     private HashMap<Integer, TbUserCouponVo> productCouponMap = new HashMap<>();
+    private HashMap<Integer, List<TbUserCouponVo>> couponMap = new HashMap<>();
 }

eladmin-system/src/main/java/cn/ysk/cashier/mybatis/service/impl/MpCashierCartServiceImpl.java

@@ -134,7 +134,7 @@ public class MpCashierCartServiceImpl extends ServiceImpl<TbCashierCartMapper, T
     @Override
     public List<TbCashierCart> selectByOrderIdAndState(Integer orderId, TableConstant.OrderInfo.Status... status) {
         LambdaQueryChainWrapper<TbCashierCart> queryChainWrapper = lambdaQuery().eq(TbCashierCart::getOrderId, orderId);
-        if (status != null) {
+        if (status != null && status.length > 0) {
             queryChainWrapper.in(TbCashierCart::getStatus, CollUtil.newArrayList(status));
         }
         return queryChainWrapper.list();

eladmin-system/src/main/java/cn/ysk/cashier/mybatis/service/impl/TbShopCouponServiceImpl.java

@@ -74,17 +74,13 @@ public class TbShopCouponServiceImpl extends ServiceImpl<TbShopCouponMapper, TbS
     private TbActivateOutRecordMapper outRecordMapper;
     @Autowired
     private TbShopShareRecordService shareRecordService;
-    private final TbMShopUserMapper shopUserMapper;
     private final MpShopUserService shopUserService;
     private final MpOrderInfoService mpOrderInfoService;
-    private final MpOrderDetailService mpOrderDetailService;
     private final MpCashierCartService mpCashierCartService;
 
-    public TbShopCouponServiceImpl(TbMShopUserMapper shopUserMapper, MpShopUserService shopUserService, MpOrderInfoService mpOrderInfoService, MpOrderDetailService mpOrderDetailService, MpCashierCartService mpCashierCartService) {
+    public TbShopCouponServiceImpl(MpShopUserService shopUserService, MpOrderInfoService mpOrderInfoService, MpCashierCartService mpCashierCartService) {
-        this.shopUserMapper = shopUserMapper;
         this.shopUserService = shopUserService;
         this.mpOrderInfoService = mpOrderInfoService;
-        this.mpOrderDetailService = mpOrderDetailService;
         this.mpCashierCartService = mpCashierCartService;
     }
 

eladmin-system/src/main/java/cn/ysk/cashier/pojo/order/TbCashierCart.java

@@ -19,15 +19,16 @@ import lombok.Data;
 import cn.hutool.core.bean.BeanUtil;
 import io.swagger.annotations.ApiModelProperty;
 import cn.hutool.core.bean.copier.CopyOptions;
+
 import javax.persistence.*;
 import javax.validation.constraints.*;
 import java.math.BigDecimal;
 import java.io.Serializable;
 
 /**
+ * @author lyf
  * @website https://eladmin.vip
  * @description /
-* @author lyf
  * @date 2024-03-02
  **/
 @Entity
@@ -189,4 +190,19 @@ public class TbCashierCart implements Serializable {
             }
         }
     }
+
+    /**
+     * 获取总价不包含打包费
+     *
+     */
+    public BigDecimal getTotalAmountByNum(Integer num) {
+        if (num == null) {
+            num = totalNumber;
+        }
+        if (isMember != null && isMember == 1 && memberPrice != null && memberPrice.compareTo(BigDecimal.ZERO) > 0) {
+            return BigDecimal.valueOf(num).multiply(memberPrice);
+        } else {
+            return BigDecimal.valueOf(num).multiply(salePrice);
+        }
+    }
 }

eladmin-system/src/main/java/cn/ysk/cashier/service/impl/shopimpl/TbShopTableServiceImpl.java

@@ -1177,33 +1177,32 @@ public class TbShopTableServiceImpl implements TbShopTableService {
 
     }
 
-    private BigDecimal calcCartPriceWithCoupon(List<TbCashierCart> newCashierCarts, OrderCouponInfoDTO couponInfoDTO, Integer memberId, TbOrderInfo orderInfo) {
+    private TbUserCouponVo getCanUseCoupon(HashMap<String, List<TbUserCouponVo>> couponMap, String productId) {
-        ArrayList<TbCashierCart> balanceCartList = new ArrayList<>();
+        List<TbUserCouponVo> tbUserCouponVos = couponMap.get(productId);
-        BigDecimal discountAmount = BigDecimal.ZERO;
+        if (tbUserCouponVos == null || tbUserCouponVos.isEmpty()) return null;
-        HashMap<String, TbUserCouponVo> couponMap = new HashMap<>();
+        for (TbUserCouponVo tbUserCouponVo : tbUserCouponVos) {
-        couponInfoDTO.getProductCouponMap().values().forEach(item -> {
+            if (tbUserCouponVo.getCurrentUseNum() > 0) {
-            couponMap.put(item.getProId().toString(), item);
+                return tbUserCouponVo;
-        });
+            }
-        HashMap<Integer, TbUserCouponVo> usedCouponMap = new HashMap<>();
+        }
-        ArrayList<TbActivateOutRecord> outRecords = new ArrayList<>();
+        return null;
-        for (TbCashierCart cashierCart : newCashierCarts) {
+    }
-            TbUserCouponVo couponVo = couponMap.get(cashierCart.getProductId());
+
-            boolean useCoupon;
+    private BigDecimal reduceProCoupon(HashMap<String, List<TbUserCouponVo>> couponMap, TbCashierCart cashierCart, HashMap<Integer,
+            List<TbUserCouponVo>> usedCouponMap, BigDecimal discountAmount, ArrayList<TbCashierCart> balanceCartList,
+                                 ArrayList<TbActivateOutRecord> outRecords, Integer memberId) {
+        TbUserCouponVo couponVo = getCanUseCoupon(couponMap, cashierCart.getProductId());
         if (couponVo != null && couponVo.getCurrentUseNum() > 0) {
-                BigDecimal currentUseNum = BigDecimal.ZERO;
+            BigDecimal currentUseNum;
             if (cashierCart.getNumber() < couponVo.getCurrentUseNum()) {
-                    currentUseNum = BigDecimal.valueOf(couponVo.getCurrentUseNum());
-                    BigDecimal cartNum = BigDecimal.valueOf(cashierCart.getNumber());
-                    BigDecimal singlePackFee = cashierCart.getPackFee().divide(cartNum, RoundingMode.HALF_UP);
-                    cashierCart.setPackFee(singlePackFee.multiply(currentUseNum));
-                    cashierCart.setTotalAmount(cashierCart.getSalePrice().multiply(currentUseNum).add(singlePackFee.multiply(currentUseNum)));
-                    cashierCart.setNumber(couponVo.getCurrentUseNum());
-                    cashierCart.setTotalNumber(couponVo.getCurrentUseNum());
                 cashierCart.setUserCouponId(couponVo.getId());
-                    discountAmount = discountAmount.add(cashierCart.getTotalAmount());
+                discountAmount = discountAmount.add(cashierCart.getTotalAmountByNum(null));
                 couponVo.setCurrentUseNum(couponVo.getCurrentUseNum() - cashierCart.getNumber());
             }
-                usedCouponMap.put(Integer.valueOf(cashierCart.getProductId()), couponVo);
+            List<TbUserCouponVo> tbUserCouponVos = usedCouponMap.computeIfAbsent(Integer.valueOf(cashierCart.getProductId()), k -> new ArrayList<>());
+            tbUserCouponVos.add(couponVo);
+
+            TbCashierCart balanceCart = null;
             // 优惠券数量小于购物车数量，分割购物车数据
             if (cashierCart.getNumber() > couponVo.getCurrentUseNum()) {
                 currentUseNum = BigDecimal.valueOf(couponVo.getCurrentUseNum());
@@ -1211,16 +1210,17 @@ public class TbShopTableServiceImpl implements TbShopTableService {
                 int balanceNum = cashierCart.getTotalNumber() - couponVo.getCurrentUseNum();
                 BigDecimal singlePackFee = cashierCart.getPackFee().divide(cartNum, RoundingMode.HALF_UP);
                 cashierCart.setPackFee(singlePackFee.multiply(currentUseNum));
-                    cashierCart.setTotalAmount(cashierCart.getSalePrice().multiply(currentUseNum).add(singlePackFee.multiply(currentUseNum)));
+                BigDecimal totalAmountByNum = cashierCart.getTotalAmountByNum(couponVo.getCurrentUseNum());
+                cashierCart.setTotalAmount(totalAmountByNum.add(singlePackFee.multiply(currentUseNum)));
                 cashierCart.setNumber(couponVo.getCurrentUseNum());
                 cashierCart.setTotalNumber(couponVo.getCurrentUseNum());
                 cashierCart.setUserCouponId(couponVo.getId());
-                    discountAmount = discountAmount.add(cashierCart.getTotalAmount());
+                discountAmount = discountAmount.add(totalAmountByNum);
                 couponVo.setCurrentUseNum(couponVo.getCurrentUseNum() - cashierCart.getNumber());
 
 
                 // 创建结余购物车
-                    TbCashierCart balanceCart = BeanUtil.copyProperties(cashierCart, TbCashierCart.class);
+                balanceCart = BeanUtil.copyProperties(cashierCart, TbCashierCart.class);
                 BigDecimal num = BigDecimal.valueOf(balanceNum);
                 balanceCart.setUserCouponId(null);
                 balanceCart.setId(null);
@@ -1231,7 +1231,7 @@ public class TbShopTableServiceImpl implements TbShopTableService {
                 balanceCartList.add(balanceCart);
             } else {
                 currentUseNum = BigDecimal.valueOf(cashierCart.getNumber());
-                    discountAmount = discountAmount.add(cashierCart.getTotalAmount());
+                discountAmount = discountAmount.add(cashierCart.getTotalAmount().divide(BigDecimal.valueOf(cashierCart.getTotalNumber()), RoundingMode.HALF_UP).multiply(currentUseNum));
                 cashierCart.setUserCouponId(couponVo.getId());
                 couponVo.setCurrentUseNum(couponVo.getCurrentUseNum() - cashierCart.getNumber());
             }
@@ -1247,7 +1247,37 @@ public class TbShopTableServiceImpl implements TbShopTableService {
             tbActivateOutRecord.setCreateTime(DateUtil.date());
             tbActivateOutRecord.setRefNum(0);
             outRecords.add(tbActivateOutRecord);
+
+            // 优惠券未消耗完毕
+            if (balanceCart != null && getCanUseCoupon(couponMap, balanceCart.getProductId()) != null) {
+                discountAmount = reduceProCoupon(couponMap, balanceCart, usedCouponMap, discountAmount, balanceCartList, outRecords, memberId);
             }
+            return discountAmount;
+        }
+        return discountAmount;
+    }
+
+    private BigDecimal calcCartPriceWithCoupon(List<TbCashierCart> newCashierCarts, OrderCouponInfoDTO couponInfoDTO, Integer memberId, TbOrderInfo orderInfo) {
+        ArrayList<TbCashierCart> balanceCartList = new ArrayList<>();
+        BigDecimal discountAmount = BigDecimal.ZERO;
+        HashMap<String, List<TbUserCouponVo>> couponMap = new HashMap<>();
+        couponInfoDTO.getProductCouponMap().values().forEach(item -> {
+            if (item.getCurrentUseNum() <= 0) {
+                return;
+            }
+            List<TbUserCouponVo> tbUserCouponVos = couponMap.get(item.getProId().toString());
+            if (tbUserCouponVos == null) {
+                tbUserCouponVos = new ArrayList<>();
+                tbUserCouponVos.add(item);
+                couponMap.put(item.getProId().toString(), tbUserCouponVos);
+            }else {
+                tbUserCouponVos.add(item);
+            }
+        });
+        HashMap<Integer, List<TbUserCouponVo>> usedCouponMap = new HashMap<>();
+        ArrayList<TbActivateOutRecord> outRecords = new ArrayList<>();
+        for (TbCashierCart cashierCart : newCashierCarts) {
+            discountAmount = reduceProCoupon(couponMap, cashierCart, usedCouponMap, discountAmount, balanceCartList, outRecords, memberId);
         }
 
         if (!balanceCartList.isEmpty()) {
@@ -1258,7 +1288,7 @@ public class TbShopTableServiceImpl implements TbShopTableService {
         mpCashierCartService.updateBatchById(newCashierCarts);
 
         couponInfoDTO.setOutRecordList(outRecords);
-        couponInfoDTO.setProductCouponMap(usedCouponMap);
+        couponInfoDTO.setCouponMap(usedCouponMap);
 
         return discountAmount;
     }
@@ -1939,7 +1969,7 @@ public class TbShopTableServiceImpl implements TbShopTableService {
         returnCoupon(orderInfo);
 
         Set<String> productIdSet = new HashSet<>();
-        List<TbCashierCart> cashierCarts = mpCashierCartService.selectByOrderIdAndState(orderInfo.getId(), null);
+        List<TbCashierCart> cashierCarts = mpCashierCartService.selectByOrderIdAndState(orderInfo.getId());
         ArrayList<TbCashierCart> activateCartInfo = new ArrayList<>();
         for (TbCashierCart cashierCart : cashierCarts) {
             productIdSet.add(cashierCart.getProductId());