实现音频服务api

internal/repository/song_repo.go

@@ -0,0 +1,67 @@
+package repository
+
+import "database/sql"
+
+type SongRepository struct {
+	db *sql.DB
+}
+
+func NewSongRepository(db *sql.DB) *SongRepository {
+	return &SongRepository{db: db}
+}
+
+func (r *SongRepository) GetAll() ([]Song, error) {
+	rows, err := r.db.Query("SELECT id, title, artist_id, album_id, duration, media_file_id FROM songs")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	songs := []Song{}
+	for rows.Next() {
+		var song Song
+		if err := rows.Scan(&song.ID, &song.Title, &song.ArtistID, &song.AlbumID, &song.Duration, &song.MediaFileID); err != nil {
+			return nil, err
+		}
+		songs = append(songs, song)
+	}
+	return songs, nil
+}
+
+func (r *SongRepository) GetAllWithDetails() ([]SongDetail, error) {
+	rows, err := r.db.Query(`
+		SELECT s.id, s.title, a.name as artist_name, al.title as album_title, s.duration, mf.path
+		FROM songs s
+		INNER JOIN media_files mf ON s.media_file_id = mf.id
+		INNER JOIN artists a ON s.artist_id = a.id
+		INNER JOIN albums al ON s.album_id = al.id
+		ORDER BY s.title
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	songs := []SongDetail{}
+	for rows.Next() {
+		var song SongDetail
+		if err := rows.Scan(&song.ID, &song.Title, &song.Artist, &song.Album, &song.Duration, &song.Path); err != nil {
+			return nil, err
+		}
+		songs = append(songs, song)
+	}
+	return songs, nil
+}
+
+func (r *SongRepository) Get(id int) (Song, error) {
+	var song Song
+	rows, err := r.db.Query("SELECT id, title, artist_id, album_id, duration, media_file_id FROM songs WHERE id = ?", id)
+	if err != nil {
+		return Song{}, err
+	}
+	defer rows.Close()
+	if rows.Next() {
+		rows.Scan(&song.ID, &song.Title, &song.ArtistID, &song.AlbumID, &song.Duration, &song.MediaFileID)
+	}
+	return song, nil
+}