Price 价格服务的编写
This commit is contained in:
YunaiV
@@ -1,351 +1,54 @@
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package cn.iocoder.mall.order.biz.service;
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import cn.iocoder.common.framework.enums.CommonStatusEnum;
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import cn.iocoder.common.framework.util.ServiceExceptionUtil;
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import cn.iocoder.mall.order.api.CartService;
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import cn.iocoder.mall.order.api.bo.CalcOrderPriceBO;
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import cn.iocoder.mall.order.api.bo.CalcSkuPriceBO;
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import cn.iocoder.mall.order.api.bo.CartItemBO;
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import cn.iocoder.mall.order.api.constant.CartItemStatusEnum;
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import cn.iocoder.mall.order.api.constant.OrderErrorCodeEnum;
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import cn.iocoder.mall.order.api.dto.CalcOrderPriceDTO;
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import cn.iocoder.mall.order.biz.convert.CartConvert;
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import cn.iocoder.mall.order.biz.dao.CartMapper;
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import cn.iocoder.mall.order.biz.dataobject.CartItemDO;
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import cn.iocoder.mall.product.api.ProductSpuService;
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import cn.iocoder.mall.product.api.bo.ProductSkuBO;
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import cn.iocoder.mall.product.api.bo.ProductSkuDetailBO;
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import cn.iocoder.mall.promotion.api.CouponService;
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import cn.iocoder.mall.promotion.api.PromotionActivityService;
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import cn.iocoder.mall.promotion.api.bo.CouponCardDetailBO;
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import cn.iocoder.mall.promotion.api.bo.PromotionActivityBO;
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import cn.iocoder.mall.promotion.api.enums.*;
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import org.apache.dubbo.config.annotation.Reference;
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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 java.util.*;
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import java.util.stream.Collectors;
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/**
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* 购物车服务 Service 实现类
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*/
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@Service
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@org.apache.dubbo.config.annotation.Service(validation = "true", version = "${dubbo.provider.CartService.version}")
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public class CartServiceImpl implements CartService {
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@Reference(validation = "true", version = "${dubbo.consumer.PromotionActivityService.version}")
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private ProductSpuService productSpuService;
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@Reference(validation = "true", version = "${dubbo.consumer.PromotionActivityService.version}")
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private PromotionActivityService promotionActivityService;
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@Reference(validation = "true", version = "${dubbo.consumer.CouponService.version}")
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private CouponService couponService;
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@Autowired
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private CartMapper cartMapper;
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@Override
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public CalcOrderPriceBO calcOrderPrice(CalcOrderPriceDTO calcOrderPriceDTO) {
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// 2. 计算【限时折扣】促销
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// 3. 计算【满减送】促销
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List<CalcOrderPriceBO.ItemGroup> itemGroups = groupByFullPrivilege(items, activityList);
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calcOrderPriceBO.setItemGroups(itemGroups);
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// 4. 计算优惠劵
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if (calcOrderPriceDTO.getCouponCardId() != null) {
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Integer result = modifyPriceByCouponCard(calcOrderPriceDTO.getUserId(), calcOrderPriceDTO.getCouponCardId(), itemGroups);
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calcOrderPriceBO.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 (CalcOrderPriceBO.ItemGroup itemGroup : calcOrderPriceBO.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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calcOrderPriceBO.setFee(new CalcOrderPriceBO.Fee(buyTotal, discountTotal, 0, presentTotal));
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// 返回
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return calcOrderPriceBO;
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}
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@Override
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@SuppressWarnings("Duplicates")
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public CalcSkuPriceBO calcSkuPrice(Integer skuId) {
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// 查询 SKU 是否合法
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ProductSkuBO sku = productSpuService.getProductSku(skuId);
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if (sku == null
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|| CommonStatusEnum.DISABLE.getValue().equals(sku.getStatus())) { // sku 被禁用
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throw ServiceExceptionUtil.exception(OrderErrorCodeEnum.CARD_ITEM_SKU_NOT_FOUND.getCode());
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}
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// 查询促销活动
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List<PromotionActivityBO> activityList = promotionActivityService.getPromotionActivityListBySpuId(sku.getSpuId(),
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Arrays.asList(PromotionActivityStatusEnum.WAIT.getValue(), PromotionActivityStatusEnum.RUN.getValue()));
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if (activityList.isEmpty()) { // 如果无促销活动，则直接返回默认结果即可
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return new CalcSkuPriceBO().setOriginalPrice(sku.getPrice()).setBuyPrice(sku.getPrice());
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}
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// 如果有促销活动，则开始做计算 TODO 芋艿，因为现在暂时只有限时折扣 + 满减送。所以写的比较简单先
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PromotionActivityBO fullPrivilege = findPromotionActivityByType(activityList, PromotionActivityTypeEnum.FULL_PRIVILEGE);
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PromotionActivityBO timeLimitedDiscount = findPromotionActivityByType(activityList, PromotionActivityTypeEnum.TIME_LIMITED_DISCOUNT);
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Integer presentPrice = calcSkuPriceByTimeLimitDiscount(sku, timeLimitedDiscount);
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// 返回结果
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return new CalcSkuPriceBO().setFullPrivilege(fullPrivilege).setTimeLimitedDiscount(timeLimitedDiscount)
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.setOriginalPrice(sku.getPrice()).setBuyPrice(presentPrice);
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}
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public class CartServiceImpl {
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private List<CalcOrderPriceBO.ItemGroup> groupByFullPrivilege(List<CalcOrderPriceBO.Item> items, List<PromotionActivityBO> activityList) {
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List<CalcOrderPriceBO.ItemGroup> itemGroups = new ArrayList<>();
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// 获得所有满减送促销
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List<PromotionActivityBO> 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 (PromotionActivityBO fullPrivilege : fullPrivileges) {
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// 创建 fullPrivilege 对应的分组
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CalcOrderPriceBO.ItemGroup itemGroup = new CalcOrderPriceBO.ItemGroup()
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.setActivity(fullPrivilege)
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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<CalcOrderPriceBO.Item> iterator = items.iterator(); iterator.hasNext(); ) {
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CalcOrderPriceBO.Item item = iterator.next();
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if (!isSpuMatchFullPrivilege(item.getSpu().getId(), 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 CalcOrderPriceBO.ItemGroup().setItems(items));
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}
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// 计算每个分组的价格
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for (CalcOrderPriceBO.ItemGroup itemGroup : itemGroups) {
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itemGroup.setActivityDiscountTotal(calcSkuPriceByFullPrivilege(itemGroup));
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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 Integer modifyPriceByCouponCard(Integer userId, Integer couponCardId, List<CalcOrderPriceBO.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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CouponCardDetailBO couponCard = couponService.getCouponCardDetail(userId, couponCardId);
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// 获得匹配的商品
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List<CalcOrderPriceBO.Item> items = new ArrayList<>();
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if (RangeTypeEnum.ALL.getValue().equals(couponCard.getRangeType())) {
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// totalPrice = spus.stream().mapToInt(spu -> spu.getPrice() * spu.getQuantity()).sum();
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itemGroups.forEach(itemGroup -> items.addAll(itemGroup.getItems()));
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} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(couponCard.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (couponCard.getRangeValues().contains(item.getSpu().getId())) {
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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(couponCard.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (!couponCard.getRangeValues().contains(item.getSpu().getId())) {
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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(couponCard.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (couponCard.getRangeValues().contains(item.getSpu().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(couponCard.getRangeType())) {
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itemGroups.forEach(itemGroup -> items.forEach(item -> {
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if (!couponCard.getRangeValues().contains(item.getSpu().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(CalcOrderPriceBO.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(PromotionErrorCodeConstants.COUPON_CARD_NOT_MATCH.getCode()); // 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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/**
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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(ProductSkuBO sku, PromotionActivityBO timeLimitedDiscount) {
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if (timeLimitedDiscount == null) {
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return sku.getPrice();
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}
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// 获得对应的优惠项
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PromotionActivityBO.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.getPrice() - item.getPreferentialValue();
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return presentPrice >= 0 ? presentPrice : sku.getPrice(); // 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.getPrice() * 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 Integer calcSkuPriceByFullPrivilege(CalcOrderPriceBO.ItemGroup itemGroup) {
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if (itemGroup.getActivity() == null) {
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return null;
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}
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PromotionActivityBO activity = itemGroup.getActivity();
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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<CalcOrderPriceBO.Item> items = itemGroup.getItems().stream().filter(CalcOrderPriceBO.Item::getSelected)
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.collect(Collectors.toList());
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Integer itemCnt = items.stream().mapToInt(CalcOrderPriceBO.Item::getBuyQuantity).sum();
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Integer originalTotal = items.stream().mapToInt(CalcOrderPriceBO.Item::getPresentTotal).sum();
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List<PromotionActivityBO.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", itemGroup.getActivity().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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PromotionActivityBO.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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// for (int i = 0; i < items.size(); i++) {
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// CalcOrderPriceBO.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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// @Override
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// @SuppressWarnings("Duplicates")
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// public CalcSkuPriceBO calcSkuPrice(Integer skuId) {
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// // 查询 SKU 是否合法
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// ProductSkuBO sku = productSpuService.getProductSku(skuId);
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// if (sku == null
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// || CommonStatusEnum.DISABLE.getValue().equals(sku.getStatus())) { // sku 被禁用
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// throw ServiceExceptionUtil.exception(OrderErrorCodeEnum.CARD_ITEM_SKU_NOT_FOUND.getCode());
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// }
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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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// // 查询促销活动
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// List<PromotionActivityBO> activityList = promotionActivityService.getPromotionActivityListBySpuId(sku.getSpuId(),
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// Arrays.asList(PromotionActivityStatusEnum.WAIT.getValue(), PromotionActivityStatusEnum.RUN.getValue()));
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// if (activityList.isEmpty()) { // 如果无促销活动，则直接返回默认结果即可
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// return new CalcSkuPriceBO().setOriginalPrice(sku.getPrice()).setBuyPrice(sku.getPrice());
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// }
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// // 如果有促销活动，则开始做计算 TODO 芋艿，因为现在暂时只有限时折扣 + 满减送。所以写的比较简单先
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// PromotionActivityBO fullPrivilege = findPromotionActivityByType(activityList, PromotionActivityTypeEnum.FULL_PRIVILEGE);
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// PromotionActivityBO timeLimitedDiscount = findPromotionActivityByType(activityList, PromotionActivityTypeEnum.TIME_LIMITED_DISCOUNT);
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// Integer presentPrice = calcSkuPriceByTimeLimitDiscount(sku, timeLimitedDiscount);
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// // 返回结果
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// return new CalcSkuPriceBO().setFullPrivilege(fullPrivilege).setTimeLimitedDiscount(timeLimitedDiscount)
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// .setOriginalPrice(sku.getPrice()).setBuyPrice(presentPrice);
|
||||
// }
|
||||
//
|
||||
//
|
||||
//
|
||||
//
|
||||
// private PromotionActivityBO findPromotionActivityByType(List<PromotionActivityBO> activityList, PromotionActivityTypeEnum type) {
|
||||
// return activityList.stream()
|
||||
// .filter(activity -> type.getValue().equals(activity.getActivityType()))
|
||||
// .findFirst().orElse(null);
|
||||
// }
|
||||
//
|
||||
// private List<PromotionActivityBO> findPromotionActivityListByType(List<PromotionActivityBO> activityList, PromotionActivityTypeEnum type) {
|
||||
// return activityList.stream()
|
||||
// .filter(activity -> type.getValue().equals(activity.getActivityType()))
|
||||
// .collect(Collectors.toList());
|
||||
// }
|
||||
|
||||
private void splitDiscountPriceToItems(List<CalcOrderPriceBO.Item> items, Integer discountTotal, Integer presentTotal) {
|
||||
for (int i = 0; i < items.size(); i++) {
|
||||
CalcOrderPriceBO.Item item = items.get(i);
|
||||
Integer discountPart;
|
||||
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
|
||||
discountPart = (int) (discountTotal * (1.0D * item.getPresentTotal() / presentTotal));
|
||||
discountTotal -= discountPart;
|
||||
} else {
|
||||
discountPart = discountTotal;
|
||||
}
|
||||
Assert.isTrue(discountPart > 0, "优惠金额必须大于 0");
|
||||
item.setDiscountTotal(item.getDiscountTotal() + discountPart);
|
||||
item.setPresentTotal(item.getBuyTotal() - item.getDiscountTotal());
|
||||
item.setPresentPrice(item.getPresentTotal() / item.getBuyQuantity());
|
||||
}
|
||||
}
|
||||
|
||||
private PromotionActivityBO findPromotionActivityByType(List<PromotionActivityBO> activityList, PromotionActivityTypeEnum type) {
|
||||
return activityList.stream()
|
||||
.filter(activity -> type.getValue().equals(activity.getActivityType()))
|
||||
.findFirst().orElse(null);
|
||||
}
|
||||
|
||||
private List<PromotionActivityBO> findPromotionActivityListByType(List<PromotionActivityBO> activityList, PromotionActivityTypeEnum type) {
|
||||
return activityList.stream()
|
||||
.filter(activity -> type.getValue().equals(activity.getActivityType()))
|
||||
.collect(Collectors.toList());
|
||||
}
|
||||
|
||||
private boolean isSpuMatchFullPrivilege(Integer spuId, PromotionActivityBO activity) {
|
||||
Assert.isTrue(PromotionActivityTypeEnum.FULL_PRIVILEGE.getValue().equals(activity.getActivityType()),
|
||||
"传入的必须的促销活动必须是满减送");
|
||||
PromotionActivityBO.FullPrivilege fullPrivilege = activity.getFullPrivilege();
|
||||
if (RangeTypeEnum.ALL.getValue().equals(fullPrivilege.getRangeType())) {
|
||||
return true;
|
||||
} else if (RangeTypeEnum.PRODUCT_INCLUDE_PART.getValue().equals(fullPrivilege.getRangeType())) {
|
||||
return fullPrivilege.getRangeValues().contains(spuId);
|
||||
} else {
|
||||
throw new IllegalArgumentException(String.format("促销活动(%s) 可用范围的类型是不正确", activity.toString()));
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user