清理价格计算相关的逻辑

pull/12/head
YunaiV 2022-10-30 18:11:52 +08:00
parent c54b330cdf
commit 0e6d94876d
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package cn.iocoder.mall.promotionservice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients(basePackages = {"cn.iocoder.mall.productservice.rpc"})
public class PromotionServiceApplication {
public static void main(String[] args) {
SpringApplication.run(PromotionServiceApplication.class, args);
}
}

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package cn.iocoder.mall.promotionservice.dal.mysql.dataobject.coupon;
import cn.iocoder.mall.mybatis.core.dataobject.BaseDO;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;
import java.util.Date;
/**
* DO
*/
@TableName("coupon_card")
@Data
@EqualsAndHashCode(callSuper = true)
@Accessors(chain = true)
public class CouponCardDO extends BaseDO {
// ========== 基本信息 BEGIN ==========
/**
*
*/
private Integer id;
/**
* {@link CouponTemplateDO} id
*/
private Integer templateId;
/**
*
*
* {@link CouponTemplateDO} title
*
* TODO
*/
private String title;
// /**
// * 核销码
// */
// private String verifyCode;
/**
*
*
* 1-使
* 2-使
* 3-
*/
private Integer status;
// ========== 基本信息 END ==========
// ========== 领取情况 BEGIN ==========
/**
*
*/
private Integer userId;
/**
*
*
* 1 -
* 2 -
*/
private Integer takeType;
// ========== 领取情况 END ==========
// ========== 使用规则 BEGIN ==========
/**
*
*/
private Integer priceAvailable;
/**
*
*/
private Date validStartTime;
/**
*
*/
private Date validEndTime;
// ========== 使用规则 END ==========
// ========== 使用效果 BEGIN ==========
/**
*
*
* 1-
* 2-
*/
private Integer preferentialType;
/**
*
*/
private Integer percentOff;
/**
*
*/
private Integer priceOff;
/**
* {@link #preferentialType} 2
*
* 20 使 8 1000 20 80
*/
private Integer discountPriceLimit;
// ========== 使用效果 END ==========
// ========== 使用情况 BEGIN ==========
// /**
// * 使用订单号
// */
// private Integer usedOrderId; // TODO 芋艿,暂时不考虑这个字段
// /**
// * 订单中优惠面值,单位:分
// */
// private Integer usedPrice; // TODO 芋艿,暂时不考虑这个字段
/**
* 使
*/
private Date usedTime;
// TODO 芋艿,后续要加优惠劵的使用日志,因为下单后,可能会取消。
// ========== 使用情况 END ==========
}

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

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package cn.iocoder.mall.promotionservice.service.banner;
import cn.iocoder.common.framework.exception.util.ServiceExceptionUtil;
import cn.iocoder.common.framework.vo.PageResult;
import cn.iocoder.mall.promotion.api.rpc.banner.dto.*;
import cn.iocoder.mall.promotionservice.convert.banner.BannerConvert;
import cn.iocoder.mall.promotionservice.dal.mysql.dataobject.banner.BannerDO;
import cn.iocoder.mall.promotionservice.dal.mysql.mapper.banner.BannerMapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;
import javax.validation.Valid;
import java.util.List;
import static cn.iocoder.mall.promotion.api.enums.PromotionErrorCodeConstants.BANNER_NOT_EXISTS;
@Service
@Validated
public class BannerService {
@Autowired
private BannerMapper bannerMapper;
/**
* Banner
*
* @param listReqDTO Banner
* @return Banner
*/
public List<BannerRespDTO> listBanners(BannerListReqDTO listReqDTO) {
List<BannerDO> banners = bannerMapper.selectList(listReqDTO);
return BannerConvert.INSTANCE.convertList(banners);
}
/**
* Banner
*
* @param bannerPageDTO Banner
* @return Banner
*/
public PageResult<BannerRespDTO> pageBanner(BannerPageReqDTO bannerPageDTO) {
IPage<BannerDO> bannerPage = bannerMapper.selectPage(bannerPageDTO);
return BannerConvert.INSTANCE.convertPage(bannerPage);
}
/**
* Banner
*
* @param createReqDTO Banner
* @return banner
*/
public Integer createBanner(@Valid BannerCreateReqDTO createReqDTO) {
// 插入到数据库
BannerDO bannerDO = BannerConvert.INSTANCE.convert(createReqDTO);
bannerMapper.insert(bannerDO);
// 返回
return bannerDO.getId();
}
/**
* Banner
*
* @param updateReqDTO Banner
*/
public void updateBanner(@Valid BannerUpdateReqDTO updateReqDTO) {
// 校验更新的 Banner 是否存在
if (bannerMapper.selectById(updateReqDTO.getId()) == null) {
throw ServiceExceptionUtil.exception(BANNER_NOT_EXISTS);
}
// 更新到数据库
BannerDO updateObject = BannerConvert.INSTANCE.convert(updateReqDTO);
bannerMapper.updateById(updateObject);
}
/**
* Banner
*
* @param bannerId Banner
*/
public void deleteBanner(Integer bannerId) {
// 校验 Banner 存在
if (bannerMapper.selectById(bannerId) == null) {
throw ServiceExceptionUtil.exception(BANNER_NOT_EXISTS);
}
// 更新到数据库
bannerMapper.deleteById(bannerId);
}
}