introduce Player interface to allow multiple player implementations

1 files changed, 3 insertions, 3 deletions

diff --git a/backend.go b/backend.go
index 0d82e7f..9f778b2 100644
--- a/backend.go
+++ b/backend.go
@@ -6,15 +6,15 @@ import (
 )
 
 type Backend interface {
-	Play(song *Song, player *Player)
+	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) OnSongFinished(song *Song)       {}
+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}