Subsonic: album/song lists (getAlbumList/2, getRandomSongs, getSongsByGenre, getNowPlaying, getStarred/2) and search (search, search2, search3)

internal/database/subsonic_helpers2.go

@@ -89,3 +89,52 @@ func SimilarSongsByArtist(db *sql.DB, artistID string, limit int) ([]*Song, erro
 	defer rows.Close()
 	return scanSongs(rows)
 }
+
+// AlbumsByHighestRating orders albums by their average user rating
+// (unrated albums last).
+func AlbumsByHighestRating(db *sql.DB, limit, offset int) ([]*Album, error) {
+	rows, err := db.Query(`SELECT al.id, al.title, al.sort_title, al.year, al.original_year, al.record_label, al.musicbrainz_id, al.primary_album_artist_id, al.cover_art_id, al.created_at
+		FROM albums al
+		LEFT JOIN (SELECT item_id, AVG(rating) AS avg_rating FROM ratings WHERE item_type='album' GROUP BY item_id) r ON r.item_id = al.id
+		ORDER BY COALESCE(r.avg_rating, 0) DESC, al.sort_title COLLATE NOCASE
+		LIMIT ? OFFSET ?`, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanAlbums(rows)
+}
+
+// AlbumsByPlayCount orders albums by total play count across all users
+// (an album with all its songs never played sorts last).
+func AlbumsByPlayCount(db *sql.DB, limit, offset int) ([]*Album, error) {
+	rows, err := db.Query(`SELECT al.id, al.title, al.sort_title, al.year, al.original_year, al.record_label, al.musicbrainz_id, al.primary_album_artist_id, al.cover_art_id, al.created_at
+		FROM albums al
+		LEFT JOIN songs s ON s.album_id = al.id
+		LEFT JOIN playback_history ph ON ph.song_id = s.id
+		GROUP BY al.id
+		ORDER BY COUNT(ph.id) DESC, al.sort_title COLLATE NOCASE
+		LIMIT ? OFFSET ?`, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanAlbums(rows)
+}
+
+// AlbumsByRecentlyPlayed orders albums by the most recent play of any of
+// their songs by the given user, most recent first.
+func AlbumsByRecentlyPlayed(db *sql.DB, userID string, limit, offset int) ([]*Album, error) {
+	rows, err := db.Query(`SELECT al.id, al.title, al.sort_title, al.year, al.original_year, al.record_label, al.musicbrainz_id, al.primary_album_artist_id, al.cover_art_id, al.created_at
+		FROM albums al
+		JOIN songs s ON s.album_id = al.id
+		JOIN playback_history ph ON ph.song_id = s.id AND ph.user_id = ?
+		GROUP BY al.id
+		ORDER BY MAX(ph.played_at) DESC
+		LIMIT ? OFFSET ?`, userID, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanAlbums(rows)
+}