实现音频服务api

internal/service/song_svc.go

@@ -0,0 +1,32 @@
+package service
+
+import "butterfliu/internal/repository"
+
+type SongService struct {
+	songRepo  *repository.SongRepository
+	mediaRepo *repository.MediaRepository
+}
+
+func NewSongService(songRepo *repository.SongRepository, mediaRepo *repository.MediaRepository) *SongService {
+	return &SongService{songRepo, mediaRepo}
+}
+
+func (s *SongService) GetAll() ([]repository.Song, error) {
+	return s.songRepo.GetAll()
+}
+
+func (s *SongService) GetAllWithDetails() ([]repository.SongDetail, error) {
+	return s.songRepo.GetAllWithDetails()
+}
+
+func (service *SongService) GetMediaFile(id int) (repository.MediaFile, error) {
+	song, err := service.songRepo.Get(id)
+	if err != nil {
+		return repository.MediaFile{}, err
+	}
+	media, err := service.mediaRepo.Get(song.MediaFileID)
+	if err != nil {
+		return repository.MediaFile{}, err
+	}
+	return media, nil
+}