feat: 迁移plant

app/plant/rpc/internal/logic/createExchangeOrderLogic.go

@@ -2,11 +2,15 @@ package logic
 
 import (
 	"context"
+	"errors"
+	"time"
 
+	plantModel "sundynix-micro-go/app/plant/model"
 	"sundynix-micro-go/app/plant/rpc/internal/svc"
 	"sundynix-micro-go/app/plant/rpc/plant"
 
 	"github.com/zeromicro/go-zero/core/logx"
+	"gorm.io/gorm"
 )
 
 type CreateExchangeOrderLogic struct {
@@ -23,8 +27,92 @@ func NewCreateExchangeOrderLogic(ctx context.Context, svcCtx *svc.ServiceContext
 	}
 }
 
+// 创建兑换订单（阳光值扣减+库存扣减事务）
 func (l *CreateExchangeOrderLogic) CreateExchangeOrder(in *plant.CreateExchangeOrderReq) (*plant.CommonResp, error) {
-	// todo: add your logic here and delete this line
+	txErr := l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
+		// 1. 查询并锁定商品
+		var item plantModel.ExchangeItem
+		if err := tx.Set("gorm:query_option", "FOR UPDATE").
+			Where("id = ? AND status = 1", in.ItemId).First(&item).Error; err != nil {
+			if errors.Is(err, gorm.ErrRecordNotFound) {
+				return errors.New("商品不存在或已下架")
+			}
+			return err
+		}
 
-	return &plant.CommonResp{}, nil
+		quantity := int(in.Quantity)
+		if quantity <= 0 {
+			quantity = 1
+		}
+		cost := item.CostSunlight
+		if cost == 0 {
+			cost = item.Cost
+		}
+		totalCost := cost * int64(quantity)
+		now := time.Now()
+		if item.StartTime != nil && now.Before(*item.StartTime) {
+			return errors.New("兑换尚未开始")
+		}
+		if item.EndTime != nil && now.After(*item.EndTime) {
+			return errors.New("兑换已结束")
+		}
+		if item.LimitPerUser > 0 {
+			var count int64
+			tx.Model(&plantModel.ExchangeOrder{}).
+				Where("user_id = ? AND item_id = ? AND status <> ?", in.UserId, in.ItemId, 5).
+				Count(&count)
+			if int(count)+quantity > item.LimitPerUser {
+				return errors.New("已达到兑换上限")
+			}
+		}
+
+		// 2. 检查库存（-1 表示无限库存）
+		if item.Stock >= 0 && item.Stock < quantity {
+			return errors.New("库存不足")
+		}
+
+		// 3. 扣减阳光值（原子操作，RowsAffected==0 说明阳光不足）
+		result := tx.Model(&plantModel.UserProfile{}).
+			Where("user_id = ? AND current_sunlight >= ?", in.UserId, totalCost).
+			Update("current_sunlight", gorm.Expr("current_sunlight - ?", totalCost))
+		if result.Error != nil {
+			return result.Error
+		}
+		if result.RowsAffected == 0 {
+			return errors.New("阳光值不足")
+		}
+
+		// 4. 扣减库存（-1无限库存时跳过）
+		if item.Stock >= 0 {
+			if err := tx.Model(&plantModel.ExchangeItem{}).
+				Where("id = ? AND stock >= ?", in.ItemId, quantity).
+				Update("stock", gorm.Expr("stock - ?", quantity)).Error; err != nil {
+				return err
+			}
+		}
+
+		// 5. 创建订单
+		order := plantModel.ExchangeOrder{
+			UserID:        in.UserId,
+			ItemID:        in.ItemId,
+			ItemName:      item.Name,
+			Cost:          totalCost,
+			CostSunlight:  totalCost,
+			Quantity:      quantity,
+			ItemType:      item.Type,
+			RecipientName: in.RecipientName,
+			Phone:         in.Phone,
+			Address:       in.Address,
+			Status:        1,
+		}
+		if item.Type == "VIRTUAL" {
+			order.Status = 4
+			order.CompletedAt = &now
+		}
+		return tx.Create(&order).Error
+	})
+	if txErr != nil {
+		return nil, txErr
+	}
+	return &plant.CommonResp{Code: 0, Msg: "ok"}, nil
 }