Optimized import, only updating changed data and purging old data

domain/album.go

@@ -29,4 +29,5 @@ type AlbumRepository interface {
 	Get(id string) (*Album, error)
 	FindByArtist(artistId string) (Albums, error)
 	GetAll(QueryOptions) (Albums, error)
+	PurgeInactive(active *Albums) error
 }

domain/artist.go

@@ -10,6 +10,7 @@ type ArtistRepository interface {
 	Put(m *Artist) error
 	Get(id string) (*Artist, error)
 	GetByName(name string) (*Artist, error)
+	PurgeInactive(active *Artists) error
 }
 
 type Artists []Artist

domain/mediafile.go

@@ -48,4 +48,5 @@ type MediaFileRepository interface {
 	Put(m *MediaFile) error
 	Get(id string) (*MediaFile, error)
 	FindByAlbum(albumId string) (MediaFiles, error)
+	PurgeInactive(active *MediaFiles) error
 }