Add multiple genres to MediaFile

scanner/cached_genre_repository.go

@@ -0,0 +1,45 @@
+package scanner
+
+import (
+	"context"
+	"strings"
+	"time"
+
+	"github.com/ReneKroon/ttlcache/v2"
+	"github.com/navidrome/navidrome/log"
+	"github.com/navidrome/navidrome/model"
+)
+
+func newCachedGenreRepository(ctx context.Context, repo model.GenreRepository) model.GenreRepository {
+	r := &cachedGenreRepo{
+		GenreRepository: repo,
+		ctx:             ctx,
+	}
+	genres, err := repo.GetAll()
+	if err != nil {
+		log.Error(ctx, "Could not load genres from DB", err)
+		return repo
+	}
+
+	r.cache = ttlcache.NewCache()
+	for _, g := range genres {
+		_ = r.cache.Set(strings.ToLower(g.Name), g.ID)
+	}
+
+	return r
+}
+
+type cachedGenreRepo struct {
+	model.GenreRepository
+	cache *ttlcache.Cache
+	ctx   context.Context
+}
+
+func (r *cachedGenreRepo) Put(g *model.Genre) error {
+	id, err := r.cache.GetByLoader(strings.ToLower(g.Name), func(key string) (interface{}, time.Duration, error) {
+		err := r.GenreRepository.Put(g)
+		return g.ID, 24 * time.Hour, err
+	})
+	g.ID = id.(string)
+	return err
+}