Harden preview enrichment and recommendation metadata

2026-03-16 16:39:09 +09:00
parent 93b9f571ab
commit 2064825d29
7 changed files with 433 additions and 106 deletions
@@ -47,14 +47,17 @@ type cachedExpansionValue struct {
 }

 type AIRecommendation struct {
-	Title           string `json:"title"`
-	Link            string `json:"link"`
-	Snippet         string `json:"snippet"`
-	ThumbnailURL    string `json:"thumbnailUrl"`
-	PreviewVideoURL string `json:"previewVideoUrl"`
-	Source          string `json:"source"`
-	Reason          string `json:"reason"`
-	Recommended     bool   `json:"recommended"`
+	Title                string `json:"title"`
+	Link                 string `json:"link"`
+	Snippet              string `json:"snippet"`
+	ThumbnailURL         string `json:"thumbnailUrl"`
+	PreviewVideoURL      string `json:"previewVideoUrl"`
+	Source               string `json:"source"`
+	Reason               string `json:"reason"`
+	Recommended          bool   `json:"recommended"`
+	MediaMode            string `json:"mediaMode,omitempty"`
+	EmbedURL             string `json:"embedUrl,omitempty"`
+	PreviewBlockedReason string `json:"previewBlockedReason,omitempty"`
 }

 type QueryExpansion struct {
@@ -480,6 +483,14 @@ func (g *GeminiService) fetchCandidateVisualInlineData(candidate SearchResult) (
 		}
 	}
 	if candidate.ThumbnailURL != "" {
+		if isLowValueThumbnail(candidate.ThumbnailURL) {
+			g.debug("gemini:vision_candidate_rejected_low_value", map[string]any{
+				"link":         candidate.Link,
+				"source":       candidate.Source,
+				"thumbnailUrl": candidate.ThumbnailURL,
+			})
+			return "", "", fmt.Errorf("candidate thumbnail is low value")
+		}
 		cacheKey := "image\n" + candidate.ThumbnailURL
 		if data, mimeType, ok := g.getCachedVisual(cacheKey); ok {
 			return data, mimeType, nil