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

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

namespace Babushka.scripts.CSharp.Common.CharacterControls;

/// <summary>
/// Defines an <see cref="Area2D"/> Node with a <see cref="CollisionShape2D"/> used for detecting <see cref="InteractionArea2D"/> nodes.
/// </summary>
public partial class Detector : Area2D
{

    [Export] private bool _active = true;
    
    /// <summary>
    /// Called when entering an interactionArea node.
    /// </summary>
    [Signal] public delegate void InteractableEnteredEventHandler();
    
    /// <summary>
    /// Called when exiting an interactionArea node.
    /// </summary>
    [Signal] public delegate void InteractableExitedEventHandler();
    
    public bool IsActive
    {
        get => _active;
        set
        {
            Visible = value;
            _active = value;
        }
    }

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

    /// <summary>
    /// Called every time this node enters an Area2D. 
    /// </summary>
    /// <param name="area"></param>
    public void OnEnteredInteractable(Node area)
    {
        if (!_active || !InputService.Instance.InputEnabled)
            return;

        if (area is DetectableInteractionArea interactionArea2D)
        {
            EmitSignal(SignalName.InteractableEntered);
        }
    }

    /// <summary>
    /// Called whenever this node exits an Area2D.
    /// </summary>
    /// <param name="area"></param>
    public void OnExitedInteractable(Node area)
    {
        if (!_active || !InputService.Instance.InputEnabled)
            return;
        
        if (area is DetectableInteractionArea interactionArea2D)
        {
            EmitSignal(SignalName.InteractableExited);
        }
    }
}