trade：1、重构 order handler 的参数；2、增加砍价商品的价格计算

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/bargain/BargainRecordApi.java

@@ -1,6 +1,7 @@
 package cn.iocoder.yudao.module.promotion.api.bargain;
 
 import cn.iocoder.yudao.module.promotion.api.bargain.dto.BargainRecordCreateReqDTO;
+import cn.iocoder.yudao.module.promotion.api.bargain.dto.BargainValidateJoinRespDTO;
 
 import javax.validation.Valid;
 
@@ -20,4 +21,16 @@ public interface BargainRecordApi {
      */
     void createBargainRecord(@Valid BargainRecordCreateReqDTO reqDTO);
 
+    /**
+     * 【下单前】校验是否参与砍价活动
+     * <p>
+     * 如果校验失败，则抛出业务异常
+     *
+     * @param userId          用户编号
+     * @param bargainRecordId 砍价活动编号
+     * @param skuId           SKU 编号
+     * @return 砍价信息
+     */
+    BargainValidateJoinRespDTO validateJoinBargain(Long userId, Long bargainRecordId, Long skuId);
+
 }

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/bargain/dto/BargainRecordCreateReqDTO.java

@@ -51,6 +51,7 @@ public class BargainRecordCreateReqDTO {
     @NotNull(message = "商品原价不能为空")
     private Integer price;
 
+    // TODO @puhui999：创建时，这个参数不应该传递哈；
     /**
      * 开团状态：进行中 砍价成功 砍价失败
      */

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/bargain/dto/BargainValidateJoinRespDTO.java

@@ -0,0 +1,25 @@
+package cn.iocoder.yudao.module.promotion.api.bargain.dto;
+
+import lombok.Data;
+
+/**
+ * 校验参与砍价 Response DTO
+ */
+@Data
+public class BargainValidateJoinRespDTO {
+
+    /**
+     * 砍价活动编号
+     */
+    private Long activityId;
+    /**
+     * 砍价活动名称
+     */
+    private String name;
+
+    /**
+     * 砍价金额
+     */
+    private Integer bargainPrice;
+
+}

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/api/seckill/SeckillActivityApi.java

@@ -19,13 +19,14 @@ public interface SeckillActivityApi {
     void updateSeckillStock(Long id, Long skuId, Integer count);
 
     /**
-     * 校验是否参与秒杀商品
+     * 【下单前】校验是否参与秒杀活动
      *
      * 如果校验失败，则抛出业务异常
      *
      * @param activityId 活动编号
      * @param skuId SKU 编号
      * @param count 数量
+     * @return 秒杀信息
      */
     SeckillValidateJoinRespDTO validateJoinSeckill(Long activityId, Long skuId, Integer count);
 

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/enums/ErrorCodeConstants.java

@@ -97,5 +97,8 @@ public interface ErrorCodeConstants {
     ErrorCode BARGAIN_RECORD_EXISTS = new ErrorCode(1_013_013_001, "砍价失败，已参与过该砍价");
     ErrorCode BARGAIN_RECORD_HEAD_NOT_EXISTS = new ErrorCode(1_013_013_002, "砍价失败，父砍价不存在");
     ErrorCode BARGAIN_RECORD_USER_FULL = new ErrorCode(1_013_013_003, "砍价失败，砍价人数已满");
+    ErrorCode BARGAIN_JOIN_RECORD_NOT_IN_PROGRESS = new ErrorCode(1_013_013_004, "砍价失败，砍价记录不在进行中");
+    ErrorCode BARGAIN_JOIN_FAILED_ACTIVITY_TIME_END = new ErrorCode(1_013_013_005, "砍价失败，活动已经结束");
+    ErrorCode BARGAIN_JOIN_ACTIVITY_STATUS_CLOSED = new ErrorCode(1_013_013_006, "砍价失败，原因：砍价活动已关闭");
 
 }

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/enums/bargain/BargainRecordStatusEnum.java

@@ -0,0 +1,39 @@
+package cn.iocoder.yudao.module.promotion.enums.bargain;
+
+import cn.iocoder.yudao.framework.common.core.IntArrayValuable;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.Arrays;
+
+/**
+ * 砍价记录的状态枚举
+ *
+ * @author 芋道源码
+ */
+@AllArgsConstructor
+@Getter
+public enum BargainRecordStatusEnum implements IntArrayValuable {
+
+    IN_PROGRESS(1, "砍价中"),
+    SUCCESS(2, "砍价成功"),
+    FAILED(3, "砍价失败"),
+    ;
+
+    public static final int[] ARRAYS = Arrays.stream(values()).mapToInt(BargainRecordStatusEnum::getStatus).toArray();
+
+    /**
+     * 值
+     */
+    private final Integer status;
+    /**
+     * 名字
+     */
+    private final String name;
+
+    @Override
+    public int[] array() {
+        return ARRAYS;
+    }
+
+}

yudao-module-mall/yudao-module-promotion-api/src/main/java/cn/iocoder/yudao/module/promotion/enums/common/PromotionTypeEnum.java

@@ -16,8 +16,8 @@ import java.util.Arrays;
 public enum PromotionTypeEnum implements IntArrayValuable {
 
     SECKILL_ACTIVITY(1, "秒杀活动"),
-    BARGAIN_ACTIVITY(2, "拼团活动"),
-    COMBINATION_ACTIVITY(3, "砍价活动"),
+    BARGAIN_ACTIVITY(2, "砍价活动"),
+    COMBINATION_ACTIVITY(3, "拼团活动"),
 
     DISCOUNT_ACTIVITY(4, "限时折扣"),
     REWARD_ACTIVITY(5, "满减送"),