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@ -1,336 +0,0 @@
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package cn.iocoder.mall.promotionservice.manager.price;
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import cn.iocoder.common.framework.exception.util.ServiceExceptionUtil;
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import cn.iocoder.common.framework.util.CollectionUtils;
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import cn.iocoder.common.framework.vo.CommonResult;
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import cn.iocoder.mall.productservice.rpc.sku.ProductSkuFeign;
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import cn.iocoder.mall.productservice.rpc.sku.dto.ProductSkuListQueryReqDTO;
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import cn.iocoder.mall.productservice.rpc.sku.dto.ProductSkuRespDTO;
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import cn.iocoder.mall.productservice.rpc.spu.ProductSpuFeign;
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import cn.iocoder.mall.productservice.rpc.spu.dto.ProductSpuRespDTO;
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import cn.iocoder.mall.promotion.api.enums.MeetTypeEnum;
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import cn.iocoder.mall.promotion.api.enums.PreferentialTypeEnum;
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import cn.iocoder.mall.promotion.api.enums.RangeTypeEnum;
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import cn.iocoder.mall.promotion.api.enums.activity.PromotionActivityStatusEnum;
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import cn.iocoder.mall.promotion.api.enums.activity.PromotionActivityTypeEnum;
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import cn.iocoder.mall.promotion.api.rpc.activity.dto.PromotionActivityRespDTO;
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import cn.iocoder.mall.promotion.api.rpc.coupon.dto.card.CouponCardRespDTO;
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import cn.iocoder.mall.promotion.api.rpc.coupon.dto.template.CouponTemplateRespDTO;
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import cn.iocoder.mall.promotion.api.rpc.price.dto.PriceProductCalcReqDTO;
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import cn.iocoder.mall.promotion.api.rpc.price.dto.PriceProductCalcRespDTO;
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import cn.iocoder.mall.promotionservice.service.activity.PromotionActivityService;
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import cn.iocoder.mall.promotionservice.service.coupon.CouponCardService;
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import cn.iocoder.mall.promotionservice.service.coupon.CouponTemplateService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.util.Assert;
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import org.springframework.validation.annotation.Validated;
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import java.util.*;
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import java.util.stream.Collectors;
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import static cn.iocoder.mall.promotion.api.enums.PromotionErrorCodeConstants.*;
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@Service
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@Validated
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public class PriceManager {
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@Autowired
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private ProductSkuFeign productSkuFeign;
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@Autowired
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private ProductSpuFeign productSpuFeign;
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@Autowired
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private PromotionActivityService promotionActivityService;
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@Autowired
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private CouponCardService couponCardService;
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@Autowired
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private CouponTemplateService couponTemplateService;
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public PriceProductCalcRespDTO calcProductPrice(PriceProductCalcReqDTO calcReqDTO) {
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// 拼装结果（主要是计算价格）
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PriceProductCalcRespDTO calcRespDTO = new PriceProductCalcRespDTO();
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List<PromotionActivityRespDTO> activityRespDTOs = promotionActivityService.listPromotionActivitiesBySpuIds(
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CollectionUtils.convertSet(listProductSkusResult.getData(), ProductSkuRespDTO::getSpuId),
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Collections.singleton(PromotionActivityStatusEnum.RUN.getValue()));
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// 2. 计算【限时折扣】促销
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this.modifyPriceByTimeLimitDiscount(calcItemRespDTOs, activityRespDTOs);
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// 3. 计算【满减送】促销
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List<PriceProductCalcRespDTO.ItemGroup> itemGroups = this.groupByFullPrivilege(calcItemRespDTOs, activityRespDTOs);
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calcRespDTO.setItemGroups(itemGroups);
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// 4. 计算优惠劵 TODO 芋艿：未详细测试；
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if (calcReqDTO.getCouponCardId() != null) {
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Integer result = this.modifyPriceByCouponCard(calcReqDTO.getUserId(), calcReqDTO.getCouponCardId(), itemGroups);
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calcRespDTO.setCouponCardDiscountTotal(result);
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}
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// 5. 计算最终的价格
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int buyTotal = 0;
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int discountTotal = 0;
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int presentTotal = 0;
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for (PriceProductCalcRespDTO.ItemGroup itemGroup : calcRespDTO.getItemGroups()) {
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buyTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getBuyTotal() : 0).sum();
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discountTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getDiscountTotal() : 0).sum();
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presentTotal += itemGroup.getItems().stream().mapToInt(item -> item.getSelected() ? item.getPresentTotal() : 0).sum();
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}
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Assert.isTrue(buyTotal - discountTotal == presentTotal,
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String.format("价格合计( %d - %d == %d )不正确", buyTotal, discountTotal, presentTotal));
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calcRespDTO.setFee(new PriceProductCalcRespDTO.Fee(buyTotal, discountTotal, 0, presentTotal));
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return calcRespDTO;
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}
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private void modifyPriceByTimeLimitDiscount(List<PriceProductCalcRespDTO.Item> items, List<PromotionActivityRespDTO> activityList) {
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for (PriceProductCalcRespDTO.Item item : items) {
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// 获得符合条件的限时折扣
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PromotionActivityRespDTO timeLimitedDiscount = activityList.stream()
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.filter(activity -> PromotionActivityTypeEnum.TIME_LIMITED_DISCOUNT.getValue().equals(activity.getActivityType())
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&& activity.getTimeLimitedDiscount().getItems().stream().anyMatch(item0 -> item0.getSpuId().equals(item.getSpuId())))
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.findFirst().orElse(null);
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if (timeLimitedDiscount == null) {
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continue;
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}
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// 计算价格
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Integer newBuyPrice = calcSkuPriceByTimeLimitDiscount(item, timeLimitedDiscount);
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if (newBuyPrice.equals(item.getBuyPrice())) { // 未优惠
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continue;
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}
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// 设置优惠
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item.setActivityId(timeLimitedDiscount.getId());
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// 设置价格
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item.setBuyPrice(newBuyPrice);
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item.setBuyTotal(newBuyPrice * item.getBuyQuantity());
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item.setPresentTotal(item.getBuyTotal() - item.getDiscountTotal());
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item.setPresentPrice(item.getPresentTotal() / item.getBuyQuantity());
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}
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}
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/**
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* 计算指定 SKU 在限时折扣下的价格
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*
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* @param sku SKU
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* @param timeLimitedDiscount 限时折扣促销。
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* 传入的该活动，要保证该 SKU 在该促销下一定有优惠。
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* @return 计算后的价格
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*/
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private Integer calcSkuPriceByTimeLimitDiscount(PriceProductCalcRespDTO.Item sku, PromotionActivityRespDTO timeLimitedDiscount) {
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if (timeLimitedDiscount == null) {
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return sku.getBuyPrice();
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}
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// 获得对应的优惠项
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PromotionActivityRespDTO.TimeLimitedDiscount.Item item = timeLimitedDiscount.getTimeLimitedDiscount().getItems().stream()
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.filter(item0 -> item0.getSpuId().equals(sku.getSpuId()))
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.findFirst().orElse(null);
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if (item == null) {
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throw new IllegalArgumentException(String.format("折扣活动(%s) 不存在商品(%s) 的优惠配置",
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timeLimitedDiscount.toString(), sku.toString()));
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}
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// 计算价格
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if (PreferentialTypeEnum.PRICE.getValue().equals(item.getPreferentialType())) { // 减价
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int presentPrice = sku.getBuyPrice() - item.getPreferentialValue();
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return presentPrice >= 0 ? presentPrice : sku.getBuyPrice(); // 如果计算优惠价格小于 0 ，则说明无法使用优惠。
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}
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if (PreferentialTypeEnum.DISCOUNT.getValue().equals(item.getPreferentialType())) { // 打折
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return sku.getBuyPrice() * item.getPreferentialValue() / 100;
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}
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throw new IllegalArgumentException(String.format("折扣活动(%s) 的优惠类型不正确", timeLimitedDiscount.toString()));
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}
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private List<PriceProductCalcRespDTO.ItemGroup> groupByFullPrivilege(List<PriceProductCalcRespDTO.Item> items, List<PromotionActivityRespDTO> activityList) {
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List<PriceProductCalcRespDTO.ItemGroup> itemGroups = new ArrayList<>();
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// 获得所有满减送促销
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List<PromotionActivityRespDTO> fullPrivileges = activityList.stream()
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.filter(activity -> PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()))
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.collect(Collectors.toList());
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// 基于满减送促销，进行分组
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if (!fullPrivileges.isEmpty()) {
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items = new ArrayList<>(items); // 因为下面会修改数组，进行浅拷贝，避免影响传入的 items 。
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for (PromotionActivityRespDTO fullPrivilege : fullPrivileges) {
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// 创建 fullPrivilege 对应的分组
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PriceProductCalcRespDTO.ItemGroup itemGroup = new PriceProductCalcRespDTO.ItemGroup()
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.setActivityId(fullPrivilege.getId())
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.setItems(new ArrayList<>());
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// 筛选商品到分组中
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for (Iterator<PriceProductCalcRespDTO.Item> iterator = items.iterator(); iterator.hasNext(); ) {
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PriceProductCalcRespDTO.Item item = iterator.next();
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if (!isSpuMatchFullPrivilege(item.getSpuId(), fullPrivilege)) {
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continue;
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}
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itemGroup.getItems().add(item);
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iterator.remove();
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}
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// 如果匹配到，则添加到 itemGroups 中
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if (!itemGroup.getItems().isEmpty()) {
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itemGroups.add(itemGroup);
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}
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}
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}
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// 处理未参加活动的商品，形成一个分组
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if (!items.isEmpty()) {
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itemGroups.add(new PriceProductCalcRespDTO.ItemGroup().setItems(items));
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}
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// 计算每个分组的价格
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Map<Integer, PromotionActivityRespDTO> activityMap = CollectionUtils.convertMap(activityList, PromotionActivityRespDTO::getId);
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for (PriceProductCalcRespDTO.ItemGroup itemGroup : itemGroups) {
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itemGroup.setActivityDiscountTotal(calcSkuPriceByFullPrivilege(itemGroup, activityMap.get(itemGroup.getActivityId())));
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}
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// 返回结果
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return itemGroups;
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}
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private boolean isSpuMatchFullPrivilege(Integer spuId, PromotionActivityRespDTO activity) {
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Assert.isTrue(PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()),
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"传入的必须的促销活动必须是满减送");
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PromotionActivityRespDTO.FullPrivilege fullPrivilege = activity.getFullPrivilege();
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if (RangeTypeEnum.ALL.getValue().equals(fullPrivilege.getRangeType())) {
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return true;
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} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(fullPrivilege.getRangeType())) {
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return fullPrivilege.getRangeValues().contains(spuId);
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}
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throw new IllegalArgumentException(String.format("促销活动(%s) 可用范围的类型是不正确", activity.toString()));
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}
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private Integer calcSkuPriceByFullPrivilege(PriceProductCalcRespDTO.ItemGroup itemGroup, PromotionActivityRespDTO activity) {
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if (itemGroup.getActivityId() == null) {
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return null;
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}
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Assert.isTrue(PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()),
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"传入的必须的满减送活动必须是满减送");
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// 获得优惠信息
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List<PriceProductCalcRespDTO.Item> items = itemGroup.getItems().stream().filter(PriceProductCalcRespDTO.Item::getSelected)
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.collect(Collectors.toList());
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Integer itemCnt = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getBuyQuantity).sum();
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Integer originalTotal = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getPresentTotal).sum();
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List<PromotionActivityRespDTO.FullPrivilege.Privilege> privileges = activity.getFullPrivilege().getPrivileges().stream()
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.filter(privilege -> {
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if (MeetTypeEnum.PRICE.getValue().equals(privilege.getMeetType())) {
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return originalTotal >= privilege.getMeetValue();
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}
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if (MeetTypeEnum.QUANTITY.getValue().equals(privilege.getMeetType())) {
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return itemCnt >= privilege.getMeetValue();
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}
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throw new IllegalArgumentException(String.format("满减送活动(%s) 的匹配(%s)不正确",
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activity.toString(), privilege.toString()));
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}).collect(Collectors.toList());
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// 获得不到优惠信息，返回原始价格
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if (privileges.isEmpty()) {
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return null;
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}
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// 获得到优惠信息，进行价格计算
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PromotionActivityRespDTO.FullPrivilege.Privilege privilege = privileges.get(privileges.size() - 1);
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Integer presentTotal;
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if (PreferentialTypeEnum.PRICE.getValue().equals(privilege.getPreferentialType())) { // 减价
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// 计算循环次数。这样，后续优惠的金额就是相乘了
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Integer cycleCount = 1;
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if (activity.getFullPrivilege().getCycled()) {
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if (MeetTypeEnum.PRICE.getValue().equals(privilege.getMeetType())) {
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cycleCount = originalTotal / privilege.getMeetValue();
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} else if (MeetTypeEnum.QUANTITY.getValue().equals(privilege.getMeetType())) {
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cycleCount = itemCnt / privilege.getMeetValue();
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}
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}
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presentTotal = originalTotal - cycleCount * privilege.getMeetValue();
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if (presentTotal < 0) { // 如果计算优惠价格小于 0 ，则说明无法使用优惠。
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presentTotal = originalTotal;
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}
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} else if (PreferentialTypeEnum.DISCOUNT.getValue().equals(privilege.getPreferentialType())) { // 打折
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presentTotal = originalTotal * privilege.getPreferentialValue() / 100;
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} else {
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throw new IllegalArgumentException(String.format("满减送促销(%s) 的优惠类型不正确", activity.toString()));
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}
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int discountTotal = originalTotal - presentTotal;
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if (discountTotal == 0) {
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return null;
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}
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// 按比例，拆分 presentTotal
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splitDiscountPriceToItems(items, discountTotal, presentTotal);
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// 返回优惠金额
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return originalTotal - presentTotal;
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}
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private Integer modifyPriceByCouponCard(Integer userId, Integer couponCardId, List<PriceProductCalcRespDTO.ItemGroup> itemGroups) {
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Assert.isTrue(couponCardId != null, "优惠劵编号不能为空");
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// 查询优惠劵
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CouponCardRespDTO couponCard = couponCardService.getCouponCard(userId, couponCardId);
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if (couponCard == null) {
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throw ServiceExceptionUtil.exception(COUPON_CARD_NOT_EXISTS);
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}
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CouponTemplateRespDTO couponTemplate = couponTemplateService.getCouponTemplate(couponCardId);
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if (couponTemplate == null) {
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throw ServiceExceptionUtil.exception(COUPON_TEMPLATE_NOT_EXISTS);
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}
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// 获得匹配的商品
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List<PriceProductCalcRespDTO.Item> items = new ArrayList<>();
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if (RangeTypeEnum.ALL.getValue().equals(couponTemplate.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.addAll(itemGroup.getItems()));
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} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (couponTemplate.getRangeValues().contains(item.getSpuId())) {
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items.add(item);
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}
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}));
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} else if (RangeTypeEnum.PRODUCT_EXCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (!couponTemplate.getRangeValues().contains(item.getSpuId())) {
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items.add(item);
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}
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}));
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} else if (RangeTypeEnum.CATEGORY_INCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (couponTemplate.getRangeValues().contains(item.getCid())) {
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items.add(item);
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}
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}));
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} else if (RangeTypeEnum.CATEGORY_EXCLUDE_PART.getValue().equals(couponTemplate.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (!couponTemplate.getRangeValues().contains(item.getCid())) {
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items.add(item);
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}
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}));
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}
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// 判断是否符合条件
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int originalTotal = items.stream().mapToInt(PriceProductCalcRespDTO.Item::getPresentTotal).sum(); // 此处，指的是以优惠劵视角的原价
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if (originalTotal == 0 || originalTotal < couponCard.getPriceAvailable()) {
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throw ServiceExceptionUtil.exception(COUPON_CARD_NOT_MATCH); // TODO 芋艿，这种情况，会出现错误码的提示，无法格式化出来。另外，这块的最佳实践，找人讨论下。
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}
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// 计算价格
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// 获得到优惠信息，进行价格计算
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int presentTotal;
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if (PreferentialTypeEnum.PRICE.getValue().equals(couponCard.getPreferentialType())) { // 减价
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// 计算循环次数。这样，后续优惠的金额就是相乘了
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presentTotal = originalTotal - couponCard.getPriceOff();
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Assert.isTrue(presentTotal > 0, "计算后，价格为负数：" + presentTotal);
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} else if (PreferentialTypeEnum.DISCOUNT.getValue().equals(couponCard.getPreferentialType())) { // 打折
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presentTotal = originalTotal * couponCard.getPercentOff() / 100;
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if (couponCard.getDiscountPriceLimit() != null // 空，代表不限制优惠上限
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&& originalTotal - presentTotal > couponCard.getDiscountPriceLimit()) {
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presentTotal = originalTotal - couponCard.getDiscountPriceLimit();
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}
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} else {
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throw new IllegalArgumentException(String.format("优惠劵(%s) 的优惠类型不正确", couponCard.toString()));
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}
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int discountTotal = originalTotal - presentTotal;
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Assert.isTrue(discountTotal > 0, "计算后，不产生优惠：" + discountTotal);
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// 按比例，拆分 presentTotal
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splitDiscountPriceToItems(items, discountTotal, presentTotal);
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// 返回优惠金额
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return originalTotal - presentTotal;
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}
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private void splitDiscountPriceToItems(List<PriceProductCalcRespDTO.Item> items, Integer discountTotal, Integer presentTotal) {
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for (int i = 0; i < items.size(); i++) {
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PriceProductCalcRespDTO.Item item = items.get(i);
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Integer discountPart;
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if (i < items.size() - 1) { // 减一的原因，是因为拆分时，如果按照比例，可能会出现.所以最后一个，使用反减
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discountPart = (int) (discountTotal * (1.0D * item.getPresentTotal() / presentTotal));
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discountTotal -= discountPart;
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} else {
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discountPart = discountTotal;
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}
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Assert.isTrue(discountPart > 0, "优惠金额必须大于 0");
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item.setDiscountTotal(item.getDiscountTotal() + discountPart);
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item.setPresentTotal(item.getBuyTotal() - item.getDiscountTotal());
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item.setPresentPrice(item.getPresentTotal() / item.getBuyQuantity());
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}
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}
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}
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YunaiV
3 years ago