feat(uploads): match release groups with MusicBrainz and AcoustID

services/api/internal/uploads/service.go

@@ -13,9 +13,11 @@ import (
 
 	"github.com/google/uuid"
 
+	"pipu/api/internal/acoustid"
 	"pipu/api/internal/auth"
 	"pipu/api/internal/library"
 	"pipu/api/internal/library/meta"
+	"pipu/api/internal/musicbrainz"
 	"pipu/api/internal/platform/apperr"
 )
 
@@ -37,9 +39,28 @@ type Service struct {
 	cfg     Config
 	log     *slog.Logger
 
-	wakeProcess chan struct{}
-	wakeImport  chan struct{}
-	now         func() time.Time
+	wakeProcess        chan struct{}
+	wakeImport         chan struct{}
+	now                func() time.Time
+	catalogue          ReleaseCatalogue
+	identifier         AudioIdentifier
+	encodedFingerprint func(context.Context, string) (string, error)
+}
+
+type ReleaseCatalogue interface {
+	Search(context.Context, musicbrainz.Query) ([]musicbrainz.Release, error)
+	Cover(context.Context, musicbrainz.Release) (musicbrainz.Cover, error)
+}
+
+func (s *Service) SetReleaseCatalogue(c ReleaseCatalogue) { s.catalogue = c }
+
+type AudioIdentifier interface {
+	Lookup(context.Context, string, int) ([]acoustid.Match, error)
+}
+
+func (s *Service) SetAudioIdentifier(c AudioIdentifier) {
+	s.identifier = c
+	s.encodedFingerprint = s.fpcalc.EncodedFingerprint
 }
 
 // NewService создаёт сервис очереди.
@@ -578,7 +599,13 @@ func (s *Service) removeStaging(ctx context.Context, f File) {
 		_ = os.Remove(m)
 	}
 	_ = os.Remove(filepath.Dir(p)) // каталог пачки, если опустел
-	if f.CoverPath != nil {
+	// A mixed batch can retain an unassigned original cover even when this file has none.
+	if s.store != nil {
+		if covers, err := s.store.UnusedReleaseCovers(ctx, f.BatchID); err == nil {
+			for _, cover := range covers {
+				_ = os.Remove(s.stagingAbs(cover))
+			}
+		}
 		if cover, err := s.store.UnusedBatchCover(ctx, f.BatchID); err == nil && cover != nil {
 			_ = os.Remove(s.stagingAbs(*cover))
 		}