cloudroam
2024-12-04 6c823dd44dbde79f008001a2a11e7bf9bc6bf8cc
src/main/java/com/mzl/flower/service/impl/coupon/CouponRecordServiceImpl.java
@@ -33,6 +33,7 @@
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.time.temporal.TemporalAdjusters;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
@@ -95,15 +96,29 @@
            // 获取锁,最多等待 10 秒,锁自动释放时间 30 秒
            if (lock.tryLock(10, 30, TimeUnit.SECONDS)) {
                try {
                    // 活动优惠券和积分优惠券需要根据库存来控制- 根据优惠券的发放数量来控制有没有超发
                    if(StringUtils.isNotBlank(couponTemplateDO.getCategory()) && (
                            couponTemplateDO.getCategory().equals(CouponCategoryEnum.ACTIVITY.getStatus()) || couponTemplateDO.getCategory().equals(CouponCategoryEnum.POINT.getStatus())
                    )){
                    // 活动优惠券 根据优惠券的发放数量来控制有没有超发
                    if(StringUtils.isNotBlank(couponTemplateDO.getCategory()) &&
                            couponTemplateDO.getCategory().equals(CouponCategoryEnum.ACTIVITY.getStatus())
                    ){
                        // 获取当前优惠券已经领取的数量
                        final Integer gainTotal = getExistGainCouponRecordAmountById(couponTemplateDO.getId());
                        if(couponTemplateDO.getCouponAmount().compareTo(gainTotal)<=0){
                            throw new ValidationException("当前优惠券已经领完!");
                        }
                    }
                    if(StringUtils.isNotBlank(couponTemplateDO.getCategory())
                            && couponTemplateDO.getCategory().equals(CouponCategoryEnum.POINT.getStatus()
                    )){
                        // 获取当前优惠券已经领取的数量
                        if(couponTemplateDO.getCouponAmount()<=0){
                            throw new ValidationException("当前优惠券已经领完!");
                        }else{
                            couponTemplateDO.setCouponAmount(couponTemplateDO.getCouponAmount()-1);
                            // 更新库存
                            couponTemplateService.updateById(couponTemplateDO);
                        }
                    }
                    // 根据用户领取设置的getLimit 查看当前用户是否已经超领优惠券
@@ -144,7 +159,9 @@
                    couponRecordDO.setCouponDiscountType(couponTemplateDO.getCouponDiscountType());
                    couponRecordDO.setGetUserType(couponTemplateDO.getGetUserType());
                    couponRecordDO.setPoint(couponTemplateDO.getPoint());
                    couponRecordDO.setMemberId(couponRecordDO.getMemberId());
                    couponRecordDO.setMemberId(couponTemplateDO.getMemberId());
                    couponRecordDO.setImageUrl(couponTemplateDO.getImageUrl());
                    couponRecordDO.setCouponDescription(couponTemplateDO.getCouponDescription());
                    // 根据优惠券模板来计算优惠券的生效开始时间和结束时间
@@ -276,6 +293,8 @@
                    couponRecordDO.setEffectiveStart(firstDayStart);
                    couponRecordDO.setEffectiveEnd(lastDayEnd);
                    couponRecordDO.setMemberId(couponTemplateDO.getMemberId());
                    couponRecordDO.setImageUrl(couponTemplateDO.getImageUrl());
                    couponRecordDO.setCouponDescription(couponTemplateDO.getCouponDescription());
                    // 创建信息
                    couponRecordDO.create();
                    if(!checkCurMonVipCouponExists(couponRecordDO.getCouponId(),couponRecordDO.getCustomerId(),firstDayStart,lastDayEnd)){
@@ -547,4 +566,65 @@
        ;
        return baseMapper.selectCount(queryWrapper)>0;
    }
    @Override
    public boolean expireCouponRecordAll() {
        return couponRecordMapperCustom.expireCouponRecordAll();
    }
    @Override
    public CouponRecordVO getUnusedFit(QueryMineCouponRecordDTO dto) {
        /**
         * ①.先查询出满足条件的优惠券(满减面值最大)
         * ②.查询面值最大的优惠券(无门槛面值最大)
         * ③查询过期时间早的优惠券④在满足③的条件下,优先使用无门槛优惠券
         * ④基于以上规则如果还存在相同的优惠券,任意选择一张优惠券即可
         */
        CouponRecordVO bestCoupon=null;
        // 查出我所有可用优惠券
        final List<CouponRecordVO> mineCouponRecordList = getMineCouponRecordList(dto);
        if(null!=dto.getOrderAmount() && CollectionUtils.isNotEmpty(mineCouponRecordList)){
            // ①.先查询出满足条件的优惠券
            // 遍历优惠券列表,找出所有minOrderAmount >= dto.orderAmount ,且couponDiscountValue 最大的优惠券
            // 筛选符合条件并找出优惠面值最大的优惠券
            bestCoupon = mineCouponRecordList.stream()
                    // 筛选出 minOrderAmount >= dto.orderAmount 的优惠券并且优惠券类型是discount的
                    .filter(coupon -> coupon.getCouponDiscountType().equals(CouponTypeEnum.DISCOUNT.getType()))
                    .filter(coupon -> coupon.getMinOrderAmount().compareTo(dto.getOrderAmount()) <= 0)
                    // 按 couponDiscountValue 倒序排序
                    .max(Comparator.comparing(CouponRecordVO::getCouponDiscountValue))
                    // 如果没有符合条件的优惠券,使用 Optional.orElse(null) 返回 null
                    .orElse(null);
            if(null==bestCoupon){
            // ②.查询面值最大的优惠券(无门槛面值最大)
//               过滤出discountType 是zero的优惠券,并根据couponDiscountValue倒序排序
                bestCoupon = mineCouponRecordList.stream()
                        .filter(coupon -> coupon.getCouponDiscountType().equals(CouponTypeEnum.ZERO.getType()))
                        .max(Comparator.comparing(CouponRecordVO::getCouponDiscountValue))
                        .orElse(null);
                // ③查询过期时间早的优惠券
                if(null!=bestCoupon){
                    final BigDecimal zeroMaxCouponDiscountValue = bestCoupon.getCouponDiscountValue();
                    // 过滤出discountType 是zero的优惠券,且couponDiscountValue与bestCoupon的couponDiscountValue面值一样的优惠券,并根据effectiveEnd正序排,获取第一条数据
                    CouponRecordVO effectiveEndEarlyCoupon= mineCouponRecordList.stream()
                            .filter(coupon -> coupon.getCouponDiscountType().equals(CouponTypeEnum.ZERO.getType()))
                            .filter(coupon -> coupon.getCouponDiscountValue().compareTo(zeroMaxCouponDiscountValue)==0)
                            .min(Comparator.comparing(CouponRecordVO::getEffectiveEnd))
                            .orElse(null);
                    if(null!=effectiveEndEarlyCoupon){
                        bestCoupon=effectiveEndEarlyCoupon;
                    }
                }
            }
        }
        return bestCoupon;
    }
}