fix: 特殊情况处理，如参与多个促销活动，部分商品在其他促销计算后的金额不足以满足与当前参与的促销活动的优惠金额
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misworga831
parent
ae93661763
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a33e053bc7
@ -10,6 +10,7 @@ import lombok.extern.slf4j.Slf4j;
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import java.util.Date;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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/**
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* 促销价格计算业务层实现
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@ -66,7 +67,7 @@ public class PromotionPriceUtil {
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List<CartSkuVO> skuVOList = tradeDTO.getSkuList();
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// 获取map分配sku的总数，如果是最后一个商品分配金额，则将金额从百分比改为总金额扣减，避免出现小数除不尽
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Integer count = skuPromotionDetail.size();
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int count = skuPromotionDetail.size();
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//已优惠金额
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Double deducted = 0D;
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@ -81,12 +82,12 @@ public class PromotionPriceUtil {
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count--;
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//sku 优惠金额
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Double skuDiscountPrice = 0d;
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Double skuDiscountPrice;
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//非最后一个商品，则按照比例计算
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if (count > 0) {
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//商品金额占比
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Double point = CurrencyUtil.div(cartSkuVO.getPriceDetailDTO().getGoodsPrice(), totalPrice, 4);
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double point = CurrencyUtil.div(cartSkuVO.getPriceDetailDTO().getGoodsPrice(), totalPrice, 4);
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//商品优惠金额
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skuDiscountPrice = CurrencyUtil.mul(discountPrice, point);
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//累加已优惠金额
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@ -96,64 +97,135 @@ public class PromotionPriceUtil {
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else {
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skuDiscountPrice = CurrencyUtil.sub(discountPrice, deducted);
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}
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//优惠券金额，则计入优惠券 ，其他则计入总的discount price
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if (promotionTypeEnum == PromotionTypeEnum.COUPON) {
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cartSkuVO.getPriceDetailDTO().setCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), skuDiscountPrice));
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.COUPON)
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.promotionId(activityId)
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.build()
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);
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} else if (promotionTypeEnum == PromotionTypeEnum.PLATFORM_COUPON) {
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cartSkuVO.getPriceDetailDTO().setSiteCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), skuDiscountPrice));
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cartSkuVO.getPriceDetailDTO().setCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), cartSkuVO.getPriceDetailDTO().getSiteCouponPrice()));
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.PLATFORM_COUPON)
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.promotionId(activityId)
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.build()
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);
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} else {
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cartSkuVO.getPriceDetailDTO().setDiscountPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getDiscountPrice(), skuDiscountPrice));
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//目前剩余的只有满减金额活动。后续如果需要调整，这里建议传递活动类型进来
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.FULL_DISCOUNT)
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.promotionId(activityId)
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.build()
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);
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}
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calculateCartSkuPromotionsPrice(cartSkuVO, skuDiscountPrice, promotionTypeEnum, activityId);
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}
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}
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}
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calculateNotEnoughPromotionsPrice(skuVOList, skuPromotionDetail, discountPrice, totalPrice, promotionTypeEnum, activityId);
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}
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/**
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* 计算购物车商品优惠金额
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*
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* @param cartSkuVO 购物车商品
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* @param skuDiscountPrice 商品优惠金额
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* @param promotionTypeEnum 优惠类型
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* @param activityId 优惠活动id
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*/
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private static void calculateCartSkuPromotionsPrice(CartSkuVO cartSkuVO, Double skuDiscountPrice, PromotionTypeEnum promotionTypeEnum, String activityId) {
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//优惠券金额，则计入优惠券 ，其他则计入总的discount price
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if (promotionTypeEnum == PromotionTypeEnum.COUPON) {
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cartSkuVO.getPriceDetailDTO().setCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), skuDiscountPrice));
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.COUPON)
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.promotionId(activityId)
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.build()
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);
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} else if (promotionTypeEnum == PromotionTypeEnum.PLATFORM_COUPON) {
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cartSkuVO.getPriceDetailDTO().setSiteCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), skuDiscountPrice));
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cartSkuVO.getPriceDetailDTO().setCouponPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getCouponPrice(), cartSkuVO.getPriceDetailDTO().getSiteCouponPrice()));
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.PLATFORM_COUPON)
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.promotionId(activityId)
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.build()
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);
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} else {
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cartSkuVO.getPriceDetailDTO().setDiscountPrice(
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CurrencyUtil.add(cartSkuVO.getPriceDetailDTO().getDiscountPrice(), skuDiscountPrice));
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//目前剩余的只有满减金额活动。后续如果需要调整，这里建议传递活动类型进来
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cartSkuVO.getPriceDetailDTO().addDiscountPriceItem(
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DiscountPriceItem.builder()
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.goodsId(cartSkuVO.getGoodsSku().getGoodsId())
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.skuId(cartSkuVO.getGoodsSku().getId())
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.discountPrice(skuDiscountPrice)
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.promotionTypeEnum(PromotionTypeEnum.FULL_DISCOUNT)
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.promotionId(activityId)
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.build()
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);
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}
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}
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/**
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* 特殊情况处理，如参与多个促销活动，部分商品在其他促销计算后的金额不足以满足与当前参与的促销活动的优惠金额
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*
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* @param skuVOList 获取购物车信息
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* @param skuPromotionDetail 参与活动的商品，以及商品总金额
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* @param discountPrice 需要分发的优惠金额
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* @param totalPrice 计算总金额
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* @param promotionTypeEnum 优惠类型
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* @param activityId 优惠活动id
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*/
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private static void calculateNotEnoughPromotionsPrice(List<CartSkuVO> skuVOList, Map<String, Double> skuPromotionDetail, Double discountPrice, Double totalPrice, PromotionTypeEnum promotionTypeEnum, String activityId) {
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// 特殊情况处理，如参与多个促销活动，部分商品在其他促销计算后的金额不足以满足与当前参与的促销活动的优惠金额
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// 但当前购物车内存在当前当前促销活动的其他商品且剩余金额也满足分摊不足商品的不足金额，则分摊到其他商品上
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// 满足当前促销的总优惠金额
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if (skuPromotionDetail == null || skuPromotionDetail.isEmpty()) {
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return;
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}
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long matchPromotionsZeroCount = skuVOList.stream().filter(l -> l.getPriceDetailDTO().getFlowPrice() == 0 && skuPromotionDetail.containsKey(l.getGoodsSku().getId())).count();
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long matchPromotionsCount = skuVOList.stream().filter(l -> skuPromotionDetail.containsKey(l.getGoodsSku().getId())).count();
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if (matchPromotionsZeroCount == matchPromotionsCount) {
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return;
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}
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// 获取剩余金额不足优惠金额的商品
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List<CartSkuVO> unEnoughSku = skuVOList.stream().filter(k -> {
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if (skuPromotionDetail.containsKey(k.getGoodsSku().getId()) && skuPromotionDetail.size() >= 2) {
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//商品金额占比
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double point = CurrencyUtil.div(k.getPriceDetailDTO().getGoodsPrice(), totalPrice, 4);
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//商品优惠金额
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Double skuDiscountPrice = CurrencyUtil.mul(discountPrice, point);
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return skuDiscountPrice > k.getPriceDetailDTO().getCouponPrice();
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}
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return false;
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}).collect(Collectors.toList());
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if (!unEnoughSku.isEmpty()) {
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for (CartSkuVO cartSkuVO : skuVOList) {
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if (unEnoughSku.isEmpty()) {
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return;
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}
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if (skuPromotionDetail.containsKey(cartSkuVO.getGoodsSku().getId()) && unEnoughSku.stream().noneMatch(k -> k.getGoodsSku().getId().equals(cartSkuVO.getGoodsSku().getId()))) {
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// 商品金额占比
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double point = CurrencyUtil.div(cartSkuVO.getPriceDetailDTO().getGoodsPrice(), totalPrice, 4);
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// 商品优惠金额
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Double skuDiscountPrice = CurrencyUtil.mul(discountPrice, point);
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// 商品优惠金额 - 不足优惠金额 = 差额
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Double sub = CurrencyUtil.sub(skuDiscountPrice, unEnoughSku.get(0).getPriceDetailDTO().getCouponPrice());
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// 分摊到其他商品： 其他商品原优惠金额 + 差额
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calculateCartSkuPromotionsPrice(cartSkuVO, sub, promotionTypeEnum, activityId);
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// 从不足商品列表中移除
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unEnoughSku.remove(0);
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}
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}
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} else {
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return;
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}
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calculateNotEnoughPromotionsPrice(skuVOList, skuPromotionDetail, discountPrice, totalPrice, promotionTypeEnum, activityId);
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}
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/**
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* 检查活动有效时间
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*
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