refactoring continued - compiles now

sharedutil/sharedutil.go

@@ -4,7 +4,6 @@ import (
 	"math"
 	"slices"
 
-	"github.com/dweymouth/supersonic/backend"
 	"github.com/dweymouth/supersonic/backend/mediaprovider"
 )
 
@@ -77,25 +76,18 @@ func FindTrackByID(id string, tracks []*mediaprovider.Track) *mediaprovider.Trac
 
 func FindMediaItemByID(id string, items []mediaprovider.MediaItem) mediaprovider.MediaItem {
 	for _, tr := range items {
-		if id == tr.MediaItemID() {
+		if id == tr.Metadata().ID {
 			return tr
 		}
 	}
 	return nil
 }
 
-func TrackIDOrEmptyStr(track *mediaprovider.Track) string {
-	if track == nil {
+func MediaItemIDOrEmptyStr(item mediaprovider.MediaItem) string {
+	if item == nil {
 		return ""
 	}
-	return track.ID
-}
-
-func TrackIDOremptyStringFromMeta(meta *backend.NowPlayingMetadata) string {
-	if meta == nil || meta.Type != backend.MediaTypeTrack {
-		return ""
-	}
-	return meta.ID
+	return item.Metadata().ID
 }
 
 func AlbumIDOrEmptyStr(track *mediaprovider.Track) string {