init

server/internal/service/aftersale.go

@@ -0,0 +1,125 @@
+package service
+
+import (
+	"dianshang/internal/model"
+	"fmt"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// AfterSaleService 售后服务
+type AfterSaleService struct {
+	db *gorm.DB
+}
+
+// NewAfterSaleService 创建售后服务
+func NewAfterSaleService(db *gorm.DB) *AfterSaleService {
+	return &AfterSaleService{
+		db: db,
+	}
+}
+
+// GetUserAfterSales 获取用户售后列表
+func (s *AfterSaleService) GetUserAfterSales(userID uint, page, pageSize int, status int) ([]model.AfterSale, int64, error) {
+	var afterSales []model.AfterSale
+	var total int64
+
+	query := s.db.Model(&model.AfterSale{}).Where("user_id = ?", userID)
+	
+	// 如果指定了状态，添加状态过滤
+	if status > 0 {
+		query = query.Where("status = ?", status)
+	}
+
+	// 获取总数
+	if err := query.Count(&total).Error; err != nil {
+		return nil, 0, err
+	}
+
+	// 分页查询，预加载关联数据
+	offset := (page - 1) * pageSize
+	if err := query.Preload("Order").Preload("OrderItem").Preload("User").
+		Order("created_at DESC").
+		Offset(offset).Limit(pageSize).
+		Find(&afterSales).Error; err != nil {
+		return nil, 0, err
+	}
+
+	return afterSales, total, nil
+}
+
+// GetAfterSaleDetail 获取售后详情
+func (s *AfterSaleService) GetAfterSaleDetail(userID, afterSaleID uint) (*model.AfterSale, error) {
+	var afterSale model.AfterSale
+	
+	if err := s.db.Where("id = ? AND user_id = ?", afterSaleID, userID).
+		Preload("Order").Preload("OrderItem").Preload("User").
+		First(&afterSale).Error; err != nil {
+		return nil, err
+	}
+
+	return &afterSale, nil
+}
+
+// CreateAfterSale 创建售后申请
+func (s *AfterSaleService) CreateAfterSale(userID uint, req *CreateAfterSaleRequest) (*model.AfterSale, error) {
+	// 验证订单是否存在且属于该用户
+	var order model.Order
+	if err := s.db.Where("id = ? AND user_id = ?", req.OrderID, userID).First(&order).Error; err != nil {
+		return nil, fmt.Errorf("订单不存在或无权限")
+	}
+
+	// 验证订单项是否存在
+	var orderItem model.OrderItem
+	if err := s.db.Where("id = ? AND order_id = ?", req.OrderItemID, req.OrderID).First(&orderItem).Error; err != nil {
+		return nil, fmt.Errorf("订单项不存在")
+	}
+
+	// 创建售后记录
+	afterSale := &model.AfterSale{
+		OrderID:     req.OrderID,
+		OrderItemID: req.OrderItemID,
+		UserID:      userID,
+		Type:        req.Type,
+		Reason:      req.Reason,
+		Description: req.Description,
+		Images:      req.Images,
+		Status:      1, // 1待审核
+		CreatedAt:   time.Now(),
+		UpdatedAt:   time.Now(),
+	}
+
+	if err := s.db.Create(afterSale).Error; err != nil {
+		return nil, err
+	}
+
+	// 预加载关联数据
+	if err := s.db.Preload("Order").Preload("OrderItem").Preload("User").
+		First(afterSale, afterSale.ID).Error; err != nil {
+		return nil, err
+	}
+
+	return afterSale, nil
+}
+
+// CreateAfterSaleRequest 创建售后申请请求
+type CreateAfterSaleRequest struct {
+	OrderID     uint      `json:"order_id" binding:"required"`
+	OrderItemID uint      `json:"order_item_id" binding:"required"`
+	Type        int       `json:"type" binding:"required"` // 1退货，2换货，3维修
+	Reason      string    `json:"reason" binding:"required"`
+	Description string    `json:"description"`
+	Images      model.JSONSlice `json:"images"`
+}
+
+// UpdateAfterSaleStatus 更新售后状态
+func (s *AfterSaleService) UpdateAfterSaleStatus(afterSaleID uint, status int, adminRemark string) error {
+	return s.db.Model(&model.AfterSale{}).
+		Where("id = ?", afterSaleID).
+		Updates(map[string]interface{}{
+			"status":       status,
+			"admin_remark": adminRemark,
+			"updated_at":   time.Now(),
+		}).Error
+}