Babushka/scripts/CSharp/Common/CharacterControls/Detector.cs

using Babushka.scripts.CSharp.Common.Services;
using Godot;

namespace Babushka.scripts.CSharp.Common.CharacterControls;

public partial class Detector : Area2D
{
    [Export] private bool _active = true;
    [Export] private bool _oneAtATime = true;
    
    [Signal] public delegate void InteractableEnteredEventHandler();
    [Signal] public delegate void InteractableExitedEventHandler();
    
    private DetectableInteractionArea? _currentInteractionArea;
    
    public bool IsActive
    {
        get => _active;
        set => _active = value;
    }

    public override void _Ready()
    {
        AreaEntered += OnEnteredInteractable;
        AreaExited += OnExitedInteractable;
    }

    public void OnEnteredInteractable(Node body)
    {
        if (!_active || !InputService.Instance.InputEnabled)
            return;
        
        GD.Print("Entered Node2D.");

        if (body is DetectableInteractionArea interactionArea2D)
        {
            GD.Print("Entered interactable.");
            _currentInteractionArea = interactionArea2D;
            interactionArea2D.ActivateInteractionArea(true);
            EmitSignal(SignalName.InteractableEntered);
            if (_oneAtATime)
                _active = false;
        }
    }

    public void OnExitedInteractable(Node body)
    {
        GD.Print("Exited Node2D.");
        
        if (body is DetectableInteractionArea interactionArea2D)
        {
            GD.Print("Exited interactable.");
            
            if (_oneAtATime && _currentInteractionArea != interactionArea2D)
                return;

            interactionArea2D.ActivateInteractionArea(false);
            _currentInteractionArea = null;
            EmitSignal(SignalName.InteractableExited);
            _active = true;
        }
    }
}