init

server/internal/service/comment.go

@@ -0,0 +1,202 @@
+package service
+
+import (
+	"encoding/json"
+	"fmt"
+	"dianshang/internal/model"
+	"dianshang/internal/repository"
+)
+
+type CommentService struct {
+	commentRepo *repository.CommentRepository
+	orderRepo   *repository.OrderRepository
+	productRepo *repository.ProductRepository
+}
+
+func NewCommentService(commentRepo *repository.CommentRepository, orderRepo *repository.OrderRepository, productRepo *repository.ProductRepository) *CommentService {
+	return &CommentService{
+		commentRepo: commentRepo,
+		orderRepo:   orderRepo,
+		productRepo: productRepo,
+	}
+}
+
+// CreateCommentRequest 创建评论请求
+type CreateCommentRequest struct {
+	OrderItemID uint     `json:"order_item_id" binding:"required"`
+	Rating      int      `json:"rating" binding:"required,min=1,max=5"`
+	Content     string   `json:"content"`
+	Images      []string `json:"images"`
+	IsAnonymous bool     `json:"is_anonymous"`
+}
+
+// CreateComment 创建评论
+func (s *CommentService) CreateComment(userID uint, req *CreateCommentRequest) (*model.Comment, error) {
+	// 1. 验证订单项是否存在且属于该用户
+	orderItem, err := s.orderRepo.GetOrderItemByID(req.OrderItemID)
+	if err != nil {
+		return nil, fmt.Errorf("订单项不存在")
+	}
+
+	// 获取订单信息验证用户权限
+	order, err := s.orderRepo.GetByID(orderItem.OrderID)
+	if err != nil {
+		return nil, fmt.Errorf("订单不存在")
+	}
+
+	if order.UserID != userID {
+		return nil, fmt.Errorf("无权限评论此商品")
+	}
+
+	// 2. 验证订单状态（只有已完成的订单才能评论）
+	if order.Status != model.OrderStatusCompleted {
+		return nil, fmt.Errorf("订单未完成，无法评论")
+	}
+
+	// 3. 检查是否已经评论过
+	if orderItem.IsCommented {
+		return nil, fmt.Errorf("该商品已经评论过了")
+	}
+
+	// 4. 处理图片数据
+	var imagesJSON string
+	if len(req.Images) > 0 {
+		imagesBytes, _ := json.Marshal(req.Images)
+		imagesJSON = string(imagesBytes)
+	}
+
+	// 5. 创建评论
+	comment := &model.Comment{
+		UserID:      userID,
+		ProductID:   orderItem.ProductID,
+		OrderID:     orderItem.OrderID,
+		OrderItemID: req.OrderItemID,
+		Rating:      req.Rating,
+		Content:     req.Content,
+		Images:      imagesJSON,
+		IsAnonymous: req.IsAnonymous,
+		Status:      1,
+	}
+
+	if err := s.commentRepo.Create(comment); err != nil {
+		return nil, fmt.Errorf("创建评论失败: %v", err)
+	}
+
+	// 6. 更新订单项评论状态
+	orderItem.IsCommented = true
+	if err := s.orderRepo.SaveOrderItem(orderItem); err != nil {
+		return nil, fmt.Errorf("更新订单项状态失败: %v", err)
+	}
+
+	// 7. 更新商品评论统计
+	if err := s.commentRepo.UpdateProductStats(orderItem.ProductID); err != nil {
+		return nil, fmt.Errorf("更新商品统计失败: %v", err)
+	}
+
+	return comment, nil
+}
+
+// GetProductComments 获取商品评论列表
+func (s *CommentService) GetProductComments(productID uint, page, pageSize int, rating int) ([]model.Comment, int64, error) {
+	offset := (page - 1) * pageSize
+	return s.commentRepo.GetByProductID(productID, offset, pageSize, rating)
+}
+
+// GetUserComments 获取用户评论列表
+func (s *CommentService) GetUserComments(userID uint, page, pageSize int) ([]model.Comment, int64, error) {
+	offset := (page - 1) * pageSize
+	return s.commentRepo.GetByUserID(userID, offset, pageSize)
+}
+
+// GetCommentStats 获取商品评论统计
+func (s *CommentService) GetCommentStats(productID uint) (*model.CommentStats, error) {
+	return s.commentRepo.GetStats(productID)
+}
+
+// GetCommentByID 获取评论详情
+func (s *CommentService) GetCommentByID(id uint) (*model.Comment, error) {
+	return s.commentRepo.GetByID(id)
+}
+
+// CreateReplyRequest 创建回复请求
+type CreateReplyRequest struct {
+	CommentID uint   `json:"comment_id" binding:"required"`
+	Content   string `json:"content" binding:"required"`
+}
+
+// CreateReply 创建评论回复
+func (s *CommentService) CreateReply(userID uint, req *CreateReplyRequest, isAdmin bool) (*model.CommentReply, error) {
+	// 验证评论是否存在
+	comment, err := s.commentRepo.GetByID(req.CommentID)
+	if err != nil {
+		return nil, fmt.Errorf("评论不存在")
+	}
+
+	if comment.Status != 1 {
+		return nil, fmt.Errorf("评论状态异常，无法回复")
+	}
+
+	// 创建回复
+	reply := &model.CommentReply{
+		CommentID: req.CommentID,
+		UserID:    userID,
+		Content:   req.Content,
+		IsAdmin:   isAdmin,
+		Status:    1,
+	}
+
+	if err := s.commentRepo.CreateReply(reply); err != nil {
+		return nil, fmt.Errorf("创建回复失败: %v", err)
+	}
+
+	return reply, nil
+}
+
+// LikeComment 点赞评论
+func (s *CommentService) LikeComment(commentID, userID uint) error {
+	return s.commentRepo.LikeComment(commentID, userID)
+}
+
+// UnlikeComment 取消点赞评论
+func (s *CommentService) UnlikeComment(commentID, userID uint) error {
+	return s.commentRepo.UnlikeComment(commentID, userID)
+}
+
+// GetCommentList 获取评论列表（管理端）
+func (s *CommentService) GetCommentList(page, pageSize int, conditions map[string]interface{}) ([]model.Comment, int64, error) {
+	offset := (page - 1) * pageSize
+	return s.commentRepo.GetList(offset, pageSize, conditions)
+}
+
+// UpdateCommentStatus 更新评论状态（管理端）
+func (s *CommentService) UpdateCommentStatus(id uint, status int) error {
+	comment, err := s.commentRepo.GetByID(id)
+	if err != nil {
+		return fmt.Errorf("评论不存在")
+	}
+
+	comment.Status = status
+	if err := s.commentRepo.Update(comment); err != nil {
+		return fmt.Errorf("更新评论状态失败: %v", err)
+	}
+
+	// 如果是隐藏或删除评论，需要更新商品统计
+	if status != 1 {
+		if err := s.commentRepo.UpdateProductStats(comment.ProductID); err != nil {
+			return fmt.Errorf("更新商品统计失败: %v", err)
+		}
+	}
+
+	return nil
+}
+
+// DeleteComment 删除评论（管理端）
+func (s *CommentService) DeleteComment(id uint) error {
+	return s.UpdateCommentStatus(id, 3)
+}
+
+// GetUncommentedOrderItems 获取用户未评论的订单项
+func (s *CommentService) GetUncommentedOrderItems(userID uint) ([]model.OrderItem, error) {
+	// 获取用户已完成但未评论的订单项
+	return s.orderRepo.GetUncommentedOrderItems(userID)
+}