From f137d84a4673b9744ba9d1a883412b26686f8c0b Mon Sep 17 00:00:00 2001
From: Alula <julekonopinska@gmail.com>
Date: Sat, 5 Sep 2020 04:08:59 +0200
Subject: [PATCH] save prev bgm song id as well

---
 src/sound/mod.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sound/mod.rs b/src/sound/mod.rs
index b2e6b00..256e0c4 100644
--- a/src/sound/mod.rs
+++ b/src/sound/mod.rs
@@ -22,6 +22,7 @@ mod wav;
 
 pub struct SoundManager {
     tx: Sender<PlaybackMessage>,
+    prev_song_id: usize,
     current_song_id: usize,
 }
 
@@ -92,6 +93,7 @@ impl SoundManager {
 
         Ok(SoundManager {
             tx: tx.clone(),
+            prev_song_id: 0,
             current_song_id: 0,
         })
     }
@@ -110,6 +112,7 @@ impl SoundManager {
             let org = organya::Song::load_from(filesystem::open(ctx, ["/base/Org/", &song_name.to_lowercase(), ".org"].join(""))?)?;
             log::info!("Playing BGM: {}", song_name);
 
+            self.prev_song_id = self.current_song_id;
             self.current_song_id = song_id;
             self.tx.send(PlaybackMessage::SaveState)?;
             self.tx.send(PlaybackMessage::PlaySong(Box::new(org)))?;
@@ -119,12 +122,14 @@ impl SoundManager {
 
     pub fn save_state(&mut self) -> GameResult {
         self.tx.send(PlaybackMessage::SaveState)?;
+        self.prev_song_id = self.current_song_id;
 
         Ok(())
     }
 
     pub fn restore_state(&mut self) -> GameResult {
         self.tx.send(PlaybackMessage::RestoreState)?;
+        self.current_song_id = self.prev_song_id;
 
         Ok(())
     }