move: 后端

backend/internal/video/comment_service.go

@@ -0,0 +1,51 @@
+package video
+
+import (
+	"context"
+	"errors"
+)
+
+type CommentService struct {
+	repo            *CommentRepository
+	VideoRepository *VideoRepository
+}
+
+func NewCommentService(repo *CommentRepository, videoRepo *VideoRepository) *CommentService {
+	return &CommentService{repo: repo, VideoRepository: videoRepo}
+}
+
+func (s *CommentService) Publish(ctx context.Context, comment *Comment) error {
+	exists, err := s.VideoRepository.IsExist(ctx, comment.VideoID)
+	if err != nil {
+		return err
+	}
+	if !exists {
+		return errors.New("video not found")
+	}
+	return s.repo.CreateComment(ctx, comment)
+}
+
+func (s *CommentService) Delete(ctx context.Context, commentID uint, accountID uint) error {
+	comment, err := s.repo.GetByID(ctx, commentID)
+	if err != nil {
+		return err
+	}
+	if comment == nil {
+		return errors.New("comment not found")
+	}
+	if comment.AuthorID != accountID {
+		return errors.New("permission denied")
+	}
+	return s.repo.DeleteComment(ctx, comment)
+}
+
+func (s *CommentService) GetAll(ctx context.Context, videoID uint) ([]Comment, error) {
+	exists, err := s.VideoRepository.IsExist(ctx, videoID)
+	if err != nil {
+		return nil, err
+	}
+	if !exists {
+		return nil, errors.New("video not found")
+	}
+	return s.repo.GetAllComments(ctx, videoID)
+}