Refactor BookRecommended function to streamline chapter recommendations. Simplify error handling and ensure consistent output format. Remove unused code related to fallback logic for chapter retrieval, enhancing performance and maintainability.

soul-api/internal/handler/book.go

@@ -380,12 +380,14 @@ func BookHot(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"success": true, "data": list})
 }
 
-// BookRecommended GET /api/book/recommended 精选推荐（首页「为你推荐」前 3 章，带 热门/推荐/精选 标签）
+// BookRecommended GET /api/book/recommended 精选推荐（首页「为你推荐」前 3 章）
+// 与内容排行榜完全同源：使用 computeArticleRankingSections，取前 3 条，保证顺序一致
 func BookRecommended(c *gin.Context) {
-	// 优先复用管理端内容排行榜的算法，保证与后台「内容排行榜」顺序一致
 	sections, err := computeArticleRankingSections(database.DB())
-	if err == nil && len(sections) > 0 {
-		// 前 3 名作为精选推荐
+	if err != nil || len(sections) == 0 {
+		c.JSON(http.StatusOK, gin.H{"success": true, "data": []gin.H{}})
+		return
+	}
 	limit := 3
 	if len(sections) < limit {
 		limit = len(sections)
@@ -411,33 +413,6 @@ func BookRecommended(c *gin.Context) {
 		})
 	}
 	c.JSON(http.StatusOK, gin.H{"success": true, "data": out})
-		return
-	}
-
-	// 兜底：沿用原有热门章节算法，至少保证有推荐
-	list := bookHotChaptersSorted(database.DB(), 3)
-	if len(list) == 0 {
-		// 第二层兜底：按 updated_at 取前 3，同样排除序言/尾声/附录
-		q := database.DB().Model(&model.Chapter{})
-		for _, p := range excludeParts {
-			q = q.Where("part_title NOT LIKE ?", "%"+p+"%")
-		}
-		q.Order("updated_at DESC, id ASC").Limit(3).Find(&list)
-	}
-	tags := []string{"热门", "推荐", "精选"}
-	out := make([]gin.H, 0, len(list))
-	for i, ch := range list {
-		tag := "精选"
-		if i < len(tags) {
-			tag = tags[i]
-		}
-		out = append(out, gin.H{
-			"id": ch.ID, "mid": ch.MID, "sectionTitle": ch.SectionTitle, "partTitle": ch.PartTitle,
-			"chapterTitle": ch.ChapterTitle, "tag": tag,
-			"isFree": ch.IsFree, "price": ch.Price, "isNew": ch.IsNew,
-		})
-	}
-	c.JSON(http.StatusOK, gin.H{"success": true, "data": out})
 }
 
 // BookLatestChapters GET /api/book/latest-chapters