feat: initial import

Game/Target.cs

@@ -0,0 +1,61 @@
+using Godot;
+using GodotHostTest.GodotDI;
+using GodotHostTest.Interfaces;
+using R3;
+
+namespace GodotHostTest.Game;
+
+public partial class Target : Node2D, ITarget
+{
+    [Export] public double TimeOutDurationInSeconds;
+    [Export] public required Timer TimeOutTimer;
+    [Export] public required Sprite2D Image;
+    [Export] public required Area2D CollisionArea;
+
+    private readonly Subject<Unit> _timedOut = new();
+    private readonly Subject<Unit> _hit = new();
+
+    [Inject] private readonly ITargetCollector _targetCollector = null!;
+
+    public override void _Ready()
+    {
+        _targetCollector.NewTarget(this);
+    }
+
+    public override void _ExitTree()
+    {
+        _timedOut.Dispose();
+        _hit.Dispose();
+    }
+
+    public Observable<Unit> TimedOut => _timedOut.AsObservable();
+
+    public Observable<Unit> Hit => _hit.AsObservable();
+
+    // todo: hook to collision
+    private void OnHit()
+    {
+        Disable();
+        TimeOutTimer.Stop();
+        _hit.OnNext(Unit.Default);
+    }
+
+    public void Enable()
+    {
+        Image.Visible = true;
+        CollisionArea.Monitoring = true;
+        TimeOutTimer.Start(TimeOutDurationInSeconds);
+    }
+
+    private void Disable()
+    {
+        Image.Visible = false;
+        CollisionArea.Monitoring = false;
+    }
+
+    private void OnTimeout()
+    {
+        Disable();
+        _timedOut.OnNext(Unit.Default);
+    }
+}