add OnSongFinished backend hook allowing to remove uploaded songs

1 files changed, 3 insertions, 4 deletions

diff --git a/backend.go b/backend.go
index 9cb42f8..0d82e7f 100644
--- a/backend.go
+++ b/backend.go
@@ -8,15 +8,14 @@ import (
 type Backend interface {
 	Play(song *Song, player *Player)
 	Search(keyword string) []Song
+	OnSongFinished(song *Song)
 }
 
 type DummyBackend struct{}
 
-func (dummy *DummyBackend) Play(song *Song, player *Player) {
-}
-
+func (dummy *DummyBackend) Play(song *Song, player *Player) {}
+func (dummy *DummyBackend) OnSongFinished(song *Song)       {}
 func (dummy *DummyBackend) Search(keyword string) []Song {
-
 	s := NewDummySong("Dummy Mc Crashtest", "exactly "+keyword)
 	return []Song{s}
 }