【功能】完成商品列表价格计算时，需要支持减免金额的功能

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/order/AppTradeOrderController.java

@@ -1,9 +1,23 @@
 package cn.iocoder.yudao.module.trade.controller.app.order;
 
+import cn.iocoder.yudao.framework.common.enums.CommonStatusEnum;
 import cn.iocoder.yudao.framework.common.pojo.CommonResult;
 import cn.iocoder.yudao.framework.common.pojo.PageResult;
 import cn.iocoder.yudao.framework.security.core.annotations.PreAuthenticated;
+import cn.iocoder.yudao.module.member.api.level.MemberLevelApi;
+import cn.iocoder.yudao.module.member.api.level.dto.MemberLevelRespDTO;
+import cn.iocoder.yudao.module.member.api.user.MemberUserApi;
+import cn.iocoder.yudao.module.member.api.user.dto.MemberUserRespDTO;
 import cn.iocoder.yudao.module.pay.api.notify.dto.PayOrderNotifyReqDTO;
+import cn.iocoder.yudao.module.product.api.sku.ProductSkuApi;
+import cn.iocoder.yudao.module.product.api.sku.dto.ProductSkuRespDTO;
+import cn.iocoder.yudao.module.promotion.api.discount.DiscountActivityApi;
+import cn.iocoder.yudao.module.promotion.api.discount.dto.DiscountProductRespDTO;
+import cn.iocoder.yudao.module.promotion.api.reward.RewardActivityApi;
+import cn.iocoder.yudao.module.promotion.api.reward.dto.RewardActivityMatchRespDTO;
+import cn.iocoder.yudao.module.promotion.enums.common.PromotionConditionTypeEnum;
+import cn.iocoder.yudao.module.promotion.enums.common.PromotionDiscountTypeEnum;
+import cn.iocoder.yudao.module.promotion.enums.common.PromotionTypeEnum;
 import cn.iocoder.yudao.module.trade.controller.app.order.vo.*;
 import cn.iocoder.yudao.module.trade.controller.app.order.vo.item.AppTradeOrderItemCommentCreateReqVO;
 import cn.iocoder.yudao.module.trade.controller.app.order.vo.item.AppTradeOrderItemRespVO;
@@ -27,12 +41,14 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
-import java.util.List;
-import java.util.Map;
+import java.time.LocalDateTime;
+import java.util.*;
 
+import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
 import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;
 import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertSet;
 import static cn.iocoder.yudao.framework.security.core.util.SecurityFrameworkUtils.getLoginUserId;
+import static cn.iocoder.yudao.module.promotion.enums.ErrorCodeConstants.DISCOUNT_ACTIVITY_TYPE_NOT_EXISTS;
 
 @Tag(name = "用户 App - 交易订单")
 @RestController
@@ -54,6 +70,17 @@ public class AppTradeOrderController {
     @Resource
     private TradeOrderProperties tradeOrderProperties;
 
+    @Resource
+    private MemberLevelApi memberLevelApi;
+    @Resource
+    private MemberUserApi memberUserApi;
+    @Resource
+    private DiscountActivityApi discountActivityApi;
+    @Resource
+    private RewardActivityApi rewardActivityApi;
+    @Resource
+    private ProductSkuApi productKpuApi;
+
     @GetMapping("/settlement")
     @Operation(summary = "获得订单结算信息")
     @PreAuthenticated
@@ -61,6 +88,51 @@ public class AppTradeOrderController {
         return success(tradeOrderUpdateService.settlementOrder(getLoginUserId(), settlementReqVO));
     }
 
+    @GetMapping("/settlementProduct")
+    @Operation(summary = "获得商品结算信息")
+    public CommonResult<List<AppTradeProductSettlementRespVO>> settlementProduct(@RequestParam("ids") Set<Long> ids) {
+        List<AppTradeProductSettlementRespVO> appTradeProductSettlementRespVOS = new ArrayList<>();
+        MemberLevelRespDTO memberLevel = getMemberLevel();
+        ids.forEach(spuId -> {
+            List<AppTradeProductSettlementRespVO.Sku> skus = new ArrayList<>();
+            List<ProductSkuRespDTO> skuList = productKpuApi.getSkuListBySpuId(Collections.singletonList(spuId));
+            //查询sku的会员和限时优惠
+            skuList.forEach(sku -> {
+                //查询限时优惠价格
+                AppTradeProductSettlementRespVO.Sku skuDiscount = calculateDiscountPrice(sku.getId(), sku.getPrice());
+                if(skuDiscount != null){
+                    skus.add(skuDiscount);
+                }
+
+                //查询会员价
+                AppTradeProductSettlementRespVO.Sku skuVip = calculateVipPrice(sku.getId(), sku.getPrice(), memberLevel);
+                if(skuVip != null){
+                    skus.add(skuVip);
+                }
+            });
+            AppTradeProductSettlementRespVO.Reward reward = calculateReward(spuId);
+            AppTradeProductSettlementRespVO respVO = AppTradeProductSettlementRespVO.builder().id(spuId).skus(skus).build();
+            if(reward != null){
+                //创建满减活动对象
+                respVO.setReward(reward);
+            }
+            appTradeProductSettlementRespVOS.add(respVO);
+        });
+        return success(appTradeProductSettlementRespVOS);
+    }
+
+    private MemberLevelRespDTO getMemberLevel() {
+        Long userId = getLoginUserId();
+        if (userId == null) {
+            return null;
+        }
+        MemberUserRespDTO user = memberUserApi.getUser(userId);
+        if (user.getLevelId() == null || user.getLevelId() <= 0) {
+            return null;
+        }
+        return memberLevelApi.getMemberLevel(user.getLevelId());
+    }
+
     @PostMapping("/create")
     @Operation(summary = "创建订单")
     @PreAuthenticated
@@ -188,4 +260,78 @@ public class AppTradeOrderController {
         return success(tradeOrderUpdateService.createOrderItemCommentByMember(getLoginUserId(), createReqVO));
     }
 
+    /**
+     * 计算会员 VIP 优惠价格
+     *
+     * @param price 原价
+     * @param memberLevel 会员等级
+     * @return 优惠价格
+     */
+    public AppTradeProductSettlementRespVO.Sku calculateVipPrice(Long skuId, Integer price, MemberLevelRespDTO memberLevel) {
+        if (memberLevel == null || memberLevel.getDiscountPercent() == null) {
+            return null;
+        }
+        Integer newPrice = price * memberLevel.getDiscountPercent() / 100;
+        return AppTradeProductSettlementRespVO.Sku.builder().
+                skuId(skuId).
+                type(PromotionTypeEnum.MEMBER_LEVEL.getType()).
+                price(price - newPrice).build();
+    }
+
+    /**
+     * 计算限时优惠信息
+     *
+     * @param price 原价
+     * @param skuId 商品规格id
+     * @return 优惠价格
+     */
+    private AppTradeProductSettlementRespVO.Sku calculateDiscountPrice(Long skuId, Integer price) {
+        if (skuId == null) {
+            return null;
+        }
+
+        //根据商品id查询限时优惠
+        List<DiscountProductRespDTO> matchDiscountProductList = discountActivityApi.getMatchDiscountProductList(Collections.singletonList(skuId));
+        if (matchDiscountProductList != null && !matchDiscountProductList.isEmpty()) {
+            DiscountProductRespDTO discountProductRespDTO = matchDiscountProductList.get(matchDiscountProductList.size() - 1);
+            AppTradeProductSettlementRespVO.Sku sku = AppTradeProductSettlementRespVO.Sku.builder().
+                    skuId(skuId).
+                    discountId(discountProductRespDTO.getId()).
+                    type(PromotionTypeEnum.DISCOUNT_ACTIVITY.getType()).
+                    endTime(discountProductRespDTO.getActivityEndTime()).
+                    build();
+            Integer discountType = discountProductRespDTO.getDiscountType();
+            if(Objects.equals(PromotionDiscountTypeEnum.PRICE.getType(), discountType)){
+                sku.setPrice(price - discountProductRespDTO.getDiscountPrice() * 100);
+            }else if(Objects.equals(PromotionDiscountTypeEnum.PERCENT.getType(), discountType)){
+                Integer newPrice = price * discountProductRespDTO.getDiscountPercent() / 100;
+                sku.setPrice(price - newPrice);
+            }else{
+                throw exception(DISCOUNT_ACTIVITY_TYPE_NOT_EXISTS);
+            }
+            return sku;
+        }
+        return null;
+    }
+
+    /**
+     * 获取第一层满减活动
+     *
+     * @param spuId 商品规格id
+     * @return 优惠价格
+     */
+    private AppTradeProductSettlementRespVO.Reward calculateReward(Long spuId) {
+        List<RewardActivityMatchRespDTO> matchRewardActivityList = rewardActivityApi.getRewardActivityBySpuIdsAndStatusAndDateTimeLt(Collections.singletonList(spuId), CommonStatusEnum.ENABLE.getStatus(), LocalDateTime.now());
+        if(matchRewardActivityList != null && !matchRewardActivityList.isEmpty()){
+            RewardActivityMatchRespDTO rewardActivityMatchRespDTO = matchRewardActivityList.get(matchRewardActivityList.size() - 1);
+            if(rewardActivityMatchRespDTO != null){
+                RewardActivityMatchRespDTO.Rule rule = rewardActivityMatchRespDTO.getRules().get(0);
+                return AppTradeProductSettlementRespVO.Reward.builder().
+                        rewardActivity("满" + rule.getLimit() / 100 + (Objects.equals(rewardActivityMatchRespDTO.getConditionType(), PromotionConditionTypeEnum.PRICE.getType())?"元":"件"+"减") +rule.getDiscountPrice() / 100)
+                        .rewardId(rewardActivityMatchRespDTO.getId()).build();
+            }
+        }
+        return null;
+    }
+
 }

yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/order/vo/AppTradeProductSettlementRespVO.java

@@ -0,0 +1,59 @@
+package cn.iocoder.yudao.module.trade.controller.app.order.vo;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Builder;
+import lombok.Data;
+
+import java.io.Serializable;
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Schema(description = "用户 App - 商品结算信息 Response VO")
+@Data
+@Builder
+public class AppTradeProductSettlementRespVO {
+
+    @Schema(description = "商品编号", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+    private Long id;
+
+    @Schema(description = "满减活动对象", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+    private Reward reward;
+
+    @Schema(description = "sku活动信息", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+    private List<Sku> skus;
+
+    /**
+     * 满减活动
+     */
+    @Data
+    @Builder
+    public static class Reward implements Serializable {
+        @Schema(description = "满减活动编号", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+        private Long rewardId;
+
+        @Schema(description = "满减活动信息", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+        private String rewardActivity;
+    }
+
+    /**
+     * SKU 数组
+     */
+    @Data
+    @Builder
+    public static class Sku implements Serializable {
+        @Schema(description = "商品 SKU 编号", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+        private Long skuId;
+
+        @Schema(description = "价格", requiredMode = Schema.RequiredMode.REQUIRED, example = "1")
+        private Integer price;
+
+        @Schema(description = "营销类型", requiredMode = Schema.RequiredMode.REQUIRED, example = "1") //PromotionTypeEnum
+        private Integer type;
+
+        @Schema(description = "限时优惠id", requiredMode = Schema.RequiredMode.REQUIRED)
+        private Long discountId;
+
+        @Schema(description = "活动结束时间", requiredMode = Schema.RequiredMode.REQUIRED)
+        private LocalDateTime endTime;
+    }
+}

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

@@ -23,6 +23,7 @@ import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
 
+import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertSet;
 import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.filterList;
 import static cn.iocoder.yudao.module.trade.service.price.calculator.TradePriceCalculatorHelper.formatPrice;
 
@@ -47,8 +48,8 @@ public class TradeRewardActivityPriceCalculator implements TradePriceCalculator
             return;
         }
         // 获得 SKU 对应的满减送活动
-        List<RewardActivityMatchRespDTO> rewardActivities = rewardActivityApi.getRewardActivityListByStatusAndNow(
-                CommonStatusEnum.ENABLE.getStatus(), LocalDateTime.now());
+        List<RewardActivityMatchRespDTO> rewardActivities = rewardActivityApi.getRewardActivityBySpuIdsAndStatusAndDateTimeLt(
+                convertSet(result.getItems(), TradePriceCalculateRespBO.OrderItem::getSpuId), CommonStatusEnum.ENABLE.getStatus(), LocalDateTime.now());
         if (CollUtil.isEmpty(rewardActivities)) {
             return;
         }