feat(moderation): add user profile content moderation for avatars, covers, and bios

internal/service/post_ai_service.go

@@ -89,6 +89,86 @@ func (e *CommentModerationReviewError) IsReview() bool {
 	return true
 }
 
+type ImageModerationRejectedError struct {
+	Reason string
+}
+
+func (e *ImageModerationRejectedError) Error() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "image rejected by moderation"
+	}
+	return "image rejected by moderation: " + e.Reason
+}
+
+func (e *ImageModerationRejectedError) UserMessage() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "图片未通过审核，请更换后重试"
+	}
+	return strings.TrimSpace(e.Reason)
+}
+
+type ImageModerationReviewError struct {
+	Reason string
+}
+
+func (e *ImageModerationReviewError) Error() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "image needs manual review"
+	}
+	return "image needs manual review: " + e.Reason
+}
+
+func (e *ImageModerationReviewError) UserMessage() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "图片需要人工复审，请耐心等待"
+	}
+	return strings.TrimSpace(e.Reason)
+}
+
+func (e *ImageModerationReviewError) IsReview() bool {
+	return true
+}
+
+type BioModerationRejectedError struct {
+	Reason string
+}
+
+func (e *BioModerationRejectedError) Error() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "bio rejected by moderation"
+	}
+	return "bio rejected by moderation: " + e.Reason
+}
+
+func (e *BioModerationRejectedError) UserMessage() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "个性签名未通过审核，请修改后重试"
+	}
+	return strings.TrimSpace(e.Reason)
+}
+
+type BioModerationReviewError struct {
+	Reason string
+}
+
+func (e *BioModerationReviewError) Error() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "bio needs manual review"
+	}
+	return "bio needs manual review: " + e.Reason
+}
+
+func (e *BioModerationReviewError) UserMessage() string {
+	if strings.TrimSpace(e.Reason) == "" {
+		return "个性签名需要人工复审，请耐心等待"
+	}
+	return strings.TrimSpace(e.Reason)
+}
+
+func (e *BioModerationReviewError) IsReview() bool {
+	return true
+}
+
 type PostAIService struct {
 	openAIClient openai.Client
 }
@@ -154,3 +234,55 @@ func (s *PostAIService) ModerateComment(ctx context.Context, content string, ima
 		return nil
 	}
 }
+
+func (s *PostAIService) ModerateImage(ctx context.Context, imageURL string) error {
+	if !s.IsEnabled() {
+		return nil
+	}
+
+	resp, err := s.openAIClient.ModerateImage(ctx, imageURL)
+	if err != nil {
+		if s.openAIClient.Config().StrictModeration {
+			return err
+		}
+		zap.L().Warn("AI image moderation failed, fallback allow",
+			zap.Error(err),
+		)
+		return nil
+	}
+
+	switch resp.Result {
+	case openai.ModerationResultBlock:
+		return &ImageModerationRejectedError{Reason: resp.Reason}
+	case openai.ModerationResultReview:
+		return &ImageModerationReviewError{Reason: resp.Reason}
+	default:
+		return nil
+	}
+}
+
+func (s *PostAIService) ModerateBio(ctx context.Context, bio string) error {
+	if !s.IsEnabled() {
+		return nil
+	}
+
+	resp, err := s.openAIClient.ModerateBio(ctx, bio)
+	if err != nil {
+		if s.openAIClient.Config().StrictModeration {
+			return err
+		}
+		zap.L().Warn("AI bio moderation failed, fallback allow",
+			zap.Error(err),
+		)
+		return nil
+	}
+
+	switch resp.Result {
+	case openai.ModerationResultBlock:
+		return &BioModerationRejectedError{Reason: resp.Reason}
+	case openai.ModerationResultReview:
+		return &BioModerationReviewError{Reason: resp.Reason}
+	default:
+		return nil
+	}
+}