Added tracking/capturing/restoration of audio playback state and position.

Harmonia.WinUI/Session/SessionRestorer.cs

@@ -1,7 +1,9 @@
-using Harmonia.Core.Player;
+using Harmonia.Core.Engine;
+using Harmonia.Core.Player;
 using Harmonia.Core.Playlists;
 using System;
 using System.Linq;
+using System.Threading.Tasks;
 
 namespace Harmonia.WinUI.Session;
 
@@ -10,10 +12,10 @@ public class SessionRestorer(
     IPlaylistManager playlistManager,
     IAudioPlayer audioPlayer) : ISessionRestorer
 {
-    public void Restore()
+    public async Task RestoreAsync()
     {
         RestorePlaylist();
-        RestoreAudioPlayer();
+        await RestoreAudioPlayerAsync();
     }
 
     private void RestorePlaylist()
@@ -31,7 +33,7 @@ public class SessionRestorer(
         playlistManager.CurrentPlaylist = playlist;
     }
 
-    private void RestoreAudioPlayer()
+    private async Task RestoreAudioPlayerAsync()
     {
         AudioPlayerState audioPlayerState = sessionService.Session.Player;
 
@@ -43,13 +45,27 @@ public class SessionRestorer(
         if (playlist is null)
             return;
 
-        PlaylistSong? song = playlist.Songs.FirstOrDefault(s => s.UID == audioPlayerState.PlaylistSongUID);
+        PlaylistSong? playlistSong = playlist.Songs.FirstOrDefault(s => s.UID == audioPlayerState.PlaylistSongUID);
 
-        if (song is null)
+        if (playlistSong is null)
             return;
 
-        //PlaybackMode playbackMode = audioPlayerState.PlaybackState
+        await audioPlayer.LoadAsync(playlistSong, PlaybackMode.LoadOnly);
 
-        audioPlayer.LoadAsync(song, PlaybackMode.LoadOnly);
+        if (audioPlayerState.Position > 0 && audioPlayerState.Position <= playlistSong.Song.Length.TotalSeconds)
+            audioPlayer.Position = audioPlayerState.Position;
+
+        switch (audioPlayerState.PlaybackState)
+        {
+            case AudioPlaybackState.Playing:
+                audioPlayer.Play();
+                break;
+            case AudioPlaybackState.Paused:
+                audioPlayer.Pause();
+                break;
+            case AudioPlaybackState.Stopped:
+                audioPlayer.Stop();
+                break;
+        }
     }
 }