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

features/level/ExitDoorComponent.cs

@@ -0,0 +1,40 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Godot;
+using Mr.BrickAdventures.app;
+using Mr.BrickAdventures.game.services;
+
+namespace Mr.BrickAdventures.features.level;
+
+[Meta(typeof(IAutoNode))]
+public partial class ExitDoorComponent : Area2D
+{
+    public override void _Notification(int what) => this.Notify(what);
+
+    [Export] public CollisionShape2D UnlockIndicator { get; set; } = null!;
+    [Export] public bool Unlocked { get; set; } = false;
+
+    [Dependency] public LevelService Levels => this.DependOn<LevelService>();
+    [Dependency] public ILevelCatalog Catalog => this.DependOn<ILevelCatalog>();
+    [Dependency] public IGameScenes Scenes => this.DependOn<IGameScenes>();
+
+    public void OnReady() {
+        BodyEntered += OnBodyEntered;
+        UpdateVisuals();
+    }
+
+    private void OnBodyEntered(Node body) {
+        if (!Unlocked) return;
+        if (body is not CharacterBody2D) return;
+
+        var nextIdx = Levels.CompleteAndAdvance();
+        var next = Catalog.Get(nextIdx);
+        if (next != null) Scenes.Load(next); else Scenes.ReturnToMain(Catalog.MainMenu);
+    }
+
+    private void UpdateVisuals() {
+        if (UnlockIndicator != null) UnlockIndicator.Disabled = !Unlocked;
+    }
+
+    public void SetUnlocked(bool value) { Unlocked = value; UpdateVisuals(); }
+}