refactor: extract helpers to reduce funlen in command_palette

internal/db/command_palette.go

@@ -9,9 +9,7 @@ func (q *Queries) GetCommandPaletteContinueWatching(ctx context.Context, userID
 	if userID == "" {
 		return nil, nil
 	}
-	if limit <= 0 {
+	limit = commandPaletteLimit(limit)
-		limit = 5
-	}
 
 	needle, pattern := commandPalettePattern(query)
 	rows, err := q.db.QueryContext(ctx, `
@@ -85,9 +83,7 @@ func (q *Queries) GetCommandPaletteWatchlist(ctx context.Context, userID string,
 	if userID == "" {
 		return nil, nil
 	}
-	if limit <= 0 {
+	limit = commandPaletteLimit(limit)
-		limit = 5
-	}
 
 	needle, pattern := commandPalettePattern(query)
 	rows, err := q.db.QueryContext(ctx, `
@@ -132,8 +128,22 @@ LIMIT ?`, userID, needle, pattern, pattern, pattern, pattern, limit)
 
 	items := make([]GetUserWatchListRow, 0, int(limit))
 	for rows.Next() {
+		item, err := scanWatchListEntry(rows)
+		if err != nil {
+			return nil, err
+		}
+		items = append(items, item)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return items, nil
+}
+
+func scanWatchListEntry(rows scanner) (GetUserWatchListRow, error) {
 	var item GetUserWatchListRow
-		if err := rows.Scan(
+	err := rows.Scan(
 		&item.ID,
 		&item.UserID,
 		&item.AnimeID,
@@ -148,16 +158,8 @@ LIMIT ?`, userID, needle, pattern, pattern, pattern, pattern, limit)
 		&item.TitleJapanese,
 		&item.ImageUrl,
 		&item.Airing,
-		); err != nil {
+	)
-			return nil, err
+	return item, err
-		}
-		items = append(items, item)
-	}
-	if err := rows.Err(); err != nil {
-		return nil, err
-	}
-
-	return items, nil
 }
 
 func commandPalettePattern(query string) (string, string) {
@@ -165,6 +167,14 @@ func commandPalettePattern(query string) (string, string) {
 	return needle, "%" + needle + "%"
 }
 
+func commandPaletteLimit(limit int64) int64 {
+	if limit <= 0 {
+		return 5
+	}
+
+	return limit
+}
+
 type scanner interface {
 	Scan(dest ...interface{}) error
 }