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+package cn.iocoder.yudao.module.trade.service.price.calculator;
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+
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+import cn.hutool.core.lang.Assert;
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+import cn.hutool.core.util.ObjectUtil;
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+import cn.hutool.core.util.StrUtil;
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+import cn.iocoder.yudao.module.promotion.api.point.PointActivityApi;
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+import cn.iocoder.yudao.module.promotion.api.point.dto.PointValidateJoinRespDTO;
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+import cn.iocoder.yudao.module.promotion.enums.common.PromotionTypeEnum;
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+import cn.iocoder.yudao.module.trade.enums.order.TradeOrderTypeEnum;
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+import cn.iocoder.yudao.module.trade.service.order.TradeOrderQueryService;
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+import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateReqBO;
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+import cn.iocoder.yudao.module.trade.service.price.bo.TradePriceCalculateRespBO;
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+import jakarta.annotation.Resource;
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+import lombok.extern.slf4j.Slf4j;
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+import org.springframework.core.annotation.Order;
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+import org.springframework.stereotype.Component;
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+
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+import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
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+import static cn.iocoder.yudao.module.trade.enums.ErrorCodeConstants.PRICE_CALCULATE_POINT_TOTAL_LIMIT_COUNT;
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+
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+/**
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+ * 积分商城的 {@link TradePriceCalculator} 实现类
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+ *
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+ * @author owen
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+ */
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+@Component
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+@Order(TradePriceCalculator.ORDER_POINT_ACTIVITY)
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+@Slf4j
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+public class TradePointActivityPriceCalculator implements TradePriceCalculator {
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+
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+ @Resource
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+ private PointActivityApi pointActivityApi;
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+
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+ @Resource
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+ private TradeOrderQueryService tradeOrderQueryService;
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+
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+ @Override
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+ public void calculate(TradePriceCalculateReqBO param, TradePriceCalculateRespBO result) {
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+ // 1. 判断订单类型是否为积分商城活动
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+ if (ObjectUtil.notEqual(result.getType(), TradeOrderTypeEnum.POINT.getType())) {
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+ return;
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+ }
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+
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+ Assert.isTrue(param.getItems().size() == 1, "积分商城兑换商品时,只允许选择一个商品");
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+ // 2. 校验是否可以参与积分商城活动
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+ TradePriceCalculateRespBO.OrderItem orderItem = result.getItems().get(0);
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+ PointValidateJoinRespDTO activity = validateJoinSeckill(
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+ param.getUserId(), param.getPointActivityId(),
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+ orderItem.getSkuId(), orderItem.getCount());
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+
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+ // 3.1 记录优惠明细
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+ int discountPrice = 0;
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+ Assert.isTrue(activity.getPoint() >= 1, "积分商城商品兑换积分必须大于 1");
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+ // 情况一:单使用积分兑换
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+ if (activity.getPrice() == null || activity.getPrice() == 0) {
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+ discountPrice = orderItem.getPayPrice();
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+ } else { // 情况二:积分 + 金额
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+ discountPrice = orderItem.getPayPrice() - activity.getPrice() * orderItem.getCount();
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+ }
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+ TradePriceCalculatorHelper.addPromotion(result, orderItem,
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+ param.getPointActivityId(), "积分商城活动", PromotionTypeEnum.POINT.getType(),
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+ StrUtil.format("积分商城活动:省 {} 元", TradePriceCalculatorHelper.formatPrice(discountPrice)),
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+ discountPrice);
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+ // 3.2 更新 SKU 优惠金额
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+ orderItem.setDiscountPrice(orderItem.getDiscountPrice() + discountPrice);
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+ TradePriceCalculatorHelper.recountPayPrice(orderItem);
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+ TradePriceCalculatorHelper.recountAllPrice(result);
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+ }
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+
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+ private PointValidateJoinRespDTO validateJoinSeckill(Long userId, Long activityId, Long skuId, Integer count) {
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+ // 1. 校验是否可以参与积分商城活动
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+ PointValidateJoinRespDTO pointValidateJoinRespDTO = pointActivityApi.validateJoinPointActivity(activityId, skuId, count);
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+ // 2. 校验总限购数量,目前只有 trade 有具体下单的数据,需要交给 trade 价格计算使用
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+ int activityProductCount = tradeOrderQueryService.getActivityProductCount(userId, activityId);
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+ if (activityProductCount + count > pointValidateJoinRespDTO.getCount()) {
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+ throw exception(PRICE_CALCULATE_POINT_TOTAL_LIMIT_COUNT);
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+ }
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+ return pointValidateJoinRespDTO;
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+ }
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+
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+}
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