update

core/storage/local/extractors.go

@@ -0,0 +1,29 @@
+package local
+
+import (
+	"io/fs"
+	"sync"
+
+	"github.com/navidrome/navidrome/model/metadata"
+)
+
+// Extractor is an interface that defines the methods that a tag/metadata extractor must implement
+type Extractor interface {
+	Parse(files ...string) (map[string]metadata.Info, error)
+	Version() string
+}
+
+type extractorConstructor func(fs.FS, string) Extractor
+
+var (
+	extractors = map[string]extractorConstructor{}
+	lock       sync.RWMutex
+)
+
+// RegisterExtractor registers a new extractor, so it can be used by the local storage. The one to be used is
+// defined with the configuration option Scanner.Extractor.
+func RegisterExtractor(id string, f extractorConstructor) {
+	lock.Lock()
+	defer lock.Unlock()
+	extractors[id] = f
+}