update

model/metadata/legacy_ids.go

@@ -0,0 +1,57 @@
+package metadata
+
+import (
+	"cmp"
+	"crypto/md5"
+	"fmt"
+	"strings"
+
+	"github.com/navidrome/navidrome/conf"
+	"github.com/navidrome/navidrome/consts"
+	"github.com/navidrome/navidrome/model"
+)
+
+// These are the legacy ID functions that were used in the original Navidrome ID generation.
+// They are kept here for backwards compatibility with existing databases.
+
+func legacyTrackID(mf model.MediaFile, prependLibId bool) string {
+	id := mf.Path
+	if prependLibId && mf.LibraryID != model.DefaultLibraryID {
+		id = fmt.Sprintf("%d\\%s", mf.LibraryID, id)
+	}
+	return fmt.Sprintf("%x", md5.Sum([]byte(id)))
+}
+
+func legacyAlbumID(mf model.MediaFile, md Metadata, prependLibId bool) string {
+	_, _, releaseDate := md.mapDates()
+	albumPath := strings.ToLower(fmt.Sprintf("%s\\%s", legacyMapAlbumArtistName(md), legacyMapAlbumName(md)))
+	if !conf.Server.Scanner.GroupAlbumReleases {
+		if len(releaseDate) != 0 {
+			albumPath = fmt.Sprintf("%s\\%s", albumPath, releaseDate)
+		}
+	}
+	if prependLibId && mf.LibraryID != model.DefaultLibraryID {
+		albumPath = fmt.Sprintf("%d\\%s", mf.LibraryID, albumPath)
+	}
+	return fmt.Sprintf("%x", md5.Sum([]byte(albumPath)))
+}
+
+func legacyMapAlbumArtistName(md Metadata) string {
+	values := []string{
+		md.String(model.TagAlbumArtist),
+		"",
+		md.String(model.TagTrackArtist),
+		consts.UnknownArtist,
+	}
+	if md.Bool(model.TagCompilation) {
+		values[1] = consts.VariousArtists
+	}
+	return cmp.Or(values...)
+}
+
+func legacyMapAlbumName(md Metadata) string {
+	return cmp.Or(
+		md.String(model.TagAlbum),
+		consts.UnknownAlbum,
+	)
+}