restore index only if the incoming tracks dont start with currently p…

…laying

related #411

jukebox/jukebox.go

@@ -121,7 +121,7 @@ func (j *Jukebox) SetPlaylist(items []string) error {
 	if err := getDecode(j.conn, &playlist, "playlist"); err != nil {
 		return fmt.Errorf("get playlist: %w", err)
 	}
-	currentPlaylistIndex := slices.IndexFunc(playlist, func(pl mpvPlaylistItem) bool {
+	currentPlayingIndex := slices.IndexFunc(playlist, func(pl mpvPlaylistItem) bool {
 		return pl.Current
 	})
 
@@ -131,19 +131,18 @@ func (j *Jukebox) SetPlaylist(items []string) error {
 	}
 	defer cleanup()
 
-	var foundExistingTrack bool
-	for _, item := range items {
+	var newPlayingIndex int = -1
+	for i, item := range items {
 		item, _ = filepath.Abs(item)
-
-		if currentPlaylistIndex >= 0 && playlist[currentPlaylistIndex].Filename == item {
-			foundExistingTrack = true
+		if currentPlayingIndex >= 0 && playlist[currentPlayingIndex].Filename == item {
+			newPlayingIndex = i
 			continue // don't add current track to loadlist
 		}
 
 		fmt.Fprintln(tmp, item)
 	}
 
-	if !foundExistingTrack {
+	if newPlayingIndex < 0 {
 		if _, err := j.conn.Call("loadlist", tmp.Name(), "replace"); err != nil {
 			return fmt.Errorf("load list: %w", err)
 		}
@@ -156,6 +155,11 @@ func (j *Jukebox) SetPlaylist(items []string) error {
 	if _, err := j.conn.Call("loadlist", tmp.Name(), "append-play"); err != nil {
 		return fmt.Errorf("load list: %w", err)
 	}
+	if newPlayingIndex > 0 {
+		if _, err := j.conn.Call("playlist-move", 0, newPlayingIndex+1); err != nil {
+			return fmt.Errorf("playlist move: %w", err)
+		}
+	}
 	return nil
 }
 

jukebox/jukebox_test.go

@@ -74,7 +74,7 @@ func TestPlaySkipReset(t *testing.T) {
 	require.Equal(t, true, status.Playing)
 
 	// just add one more by overwriting the playlist like some clients do
-	// we should move the now play playing index (3) back to the start if we find it
+	// we should move keep the playing indedx
 	require.NoError(t, j.SetPlaylist([]string{
 		"testdata/tr_0.mp3",
 		"testdata/tr_1.mp3",
@@ -86,21 +86,11 @@ func TestPlaySkipReset(t *testing.T) {
 
 	status, err = j.GetStatus()
 	require.NoError(t, err)
-	require.Equal(t, 0, status.CurrentIndex) // index moved to start
+	require.Equal(t, 3, status.CurrentIndex) // index moved to start
 	require.Equal(t, testPath("tr_3.mp3"), status.CurrentFilename)
 	require.Equal(t, 6, status.Length) // we added one more track
 	require.Equal(t, true, status.Playing)
 
-	// skip to index 3 again, which is now tr_2 after re-order
-	require.NoError(t, j.SkipToPlaylistIndex(3, 0))
-
-	status, err = j.GetStatus()
-	require.NoError(t, err)
-	require.Equal(t, 3, status.CurrentIndex)
-	require.Equal(t, testPath("tr_2.mp3"), status.CurrentFilename)
-	require.Equal(t, 6, status.Length)
-	require.Equal(t, true, status.Playing)
-
 	// new playlist with out current track (tr_2)
 	require.NoError(t, j.SetPlaylist([]string{
 		"testdata/tr_6.mp3",