Adding initial playback bar logic.

Harmonia.Core/Playlists/PlaylistRepository.cs

@@ -4,7 +4,26 @@ namespace Harmonia.Core.Playlists;
 
 public class PlaylistRepository : JsonFileRepository<Playlist>, IPlaylistRepository
 {
-    protected override string DirectoryName => string.Empty;
+    protected override string DirectoryName => Path.Combine("Playlists");
+
+    public PlaylistRepository()
+    {
+        List<Playlist> playlists = Get();
+
+        foreach (Playlist playlist in playlists)
+        {
+            playlist.PlaylistUpdated += OnPlaylistUpdated;
+        }
+    }
+
+    private void OnPlaylistUpdated(object? sender, PlaylistUpdatedEventArgs e)
+    {
+        if (sender is not Playlist playlist)
+            return;
+
+        Save(playlist);
+        //PlaylistUpdated?.Invoke(sender, e);
+    }
 
     public Playlist? GetPlaylist(PlaylistSong playlistSong)
     {
@@ -24,4 +43,29 @@ public class PlaylistRepository : JsonFileRepository<Playlist>, IPlaylistReposit
 
         throw new Exception("Unable to determine new fileName");
     }
+
+    public event EventHandler<PlaylistAddedEventArgs>? PlaylistAdded;
+    //public event EventHandler<PlaylistUpdatedEventArgs>? PlaylistUpdated;
+    public event EventHandler<PlaylistRemovedEventArgs>? PlaylistRemoved;
+
+    public void AddPlaylist()
+    {
+        Playlist playlist = new()
+        {
+            Name = "New Playlist"
+        };
+
+        playlist.PlaylistUpdated += OnPlaylistUpdated;
+
+        Save(playlist);
+        PlaylistAdded?.Invoke(this, new(playlist));
+    }
+
+    public void RemovePlaylist(Playlist playlist)
+    {
+        playlist.PlaylistUpdated -= OnPlaylistUpdated;
+
+        Delete(playlist);
+        PlaylistRemoved?.Invoke(this, new(playlist));
+    }
 }