Add game scene and level catalog interfaces, and implement scene management in AppRoot

common/AppRoot.cs

@@ -1,6 +1,8 @@
 using Chickensoft.AutoInject;
 using Chickensoft.Introspection;
 using Godot;
+using Godot.Collections;
+using Mr.BrickAdventures.app;
 using Mr.BrickAdventures.data;
 using Mr.BrickAdventures.game.repositories;
 using Mr.BrickAdventures.game.services;
@@ -8,27 +10,61 @@ using Mr.BrickAdventures.game.services;
 namespace Mr.BrickAdventures.common;
 
 [Meta(typeof(IAutoNode))]
-public partial class AppRoot : Node2D, IProvide<PlayerRepository>, IProvide<LevelRepository>, IProvide<SaveClient>, IProvide<SaveService>
+public partial class AppRoot : Node2D,
+    IProvide<PlayerRepository>,
+    IProvide<LevelRepository>,
+    IProvide<SaveClient>,
+    IProvide<SaveService>,
+    IProvide<LevelService>,
+    IProvide<IGameScenes>,
+    IProvide<ILevelCatalog>,
+    IGameScenes
 {
     public override void _Notification(int what) => this.Notify(what);
+    
+    [Export] private Array<PackedScene> _levels = [];
+    [Export] private PackedScene _mainMenu = null!;
 
     private readonly SaveClient _save = new("user://savegame.save", version: 2);
     private readonly PlayerRepository _players = new();
-    private readonly LevelRepository _levels = new();
+    private readonly LevelRepository _levelsRepo = new();
     private SaveService _saveService = null!;
+    private LevelService _levelService = null!;
+    private ILevelCatalog _catalog = null!;
 
     PlayerRepository IProvide<PlayerRepository>.Value() => _players;
-    LevelRepository  IProvide<LevelRepository>.Value()  => _levels;
+    LevelRepository  IProvide<LevelRepository>.Value()  => _levelsRepo;
     SaveClient       IProvide<SaveClient>.Value()       => _save;
     SaveService      IProvide<SaveService>.Value()      => _saveService;
+    LevelService     IProvide<LevelService>.Value()     => _levelService;
+    ILevelCatalog    IProvide<ILevelCatalog>.Value()    => _catalog;
+    IGameScenes IProvide<IGameScenes>.Value()  => this;
     
 
     public void OnReady()
     {
-        _saveService = new SaveService(_players, _levels, _save);
+        _saveService = new SaveService(_players, _levelsRepo, _save);
+        _levelService = new LevelService(_levelsRepo);
+
+        _catalog = new ExportedLevelCatalog(_levels, _mainMenu);
 
         _saveService.TryLoad();
-
         this.Provide();
     }
+
+    public void Load(PackedScene scene) => GetTree().ChangeSceneToPacked(scene);
+    public void Restart() => GetTree().ReloadCurrentScene();
+    public void ReturnToMain(PackedScene mainMenu) => GetTree().ChangeSceneToPacked(mainMenu);
+
+    private sealed class ExportedLevelCatalog : ILevelCatalog
+    {
+        private readonly Array<PackedScene> _levels;
+        public PackedScene MainMenu { get; }
+        public ExportedLevelCatalog(Array<PackedScene> levels, PackedScene mainMenu) {
+            _levels = levels; MainMenu = mainMenu;
+        }
+        public int Count => _levels.Count;
+        public PackedScene? Get(int index) => (index >= 0 && index < _levels.Count) ? _levels[index] : null;
+        public PackedScene First => _levels.Count > 0 ? _levels[0] : MainMenu;
+    }
 }