cirnogodot/Scripts/Activables/BlackCover.cs

using System;
using Godot;

namespace Cirno.Scripts.Activables;

public partial class BlackCover : Sprite2D, IActivable
{
    [Export]
    public bool StartActive { get; private set; } = true;

    [Signal]
    public delegate void DisabledEventHandler();
    
    private bool _activated;

    public override void _Ready()
    {
        _activated = StartActive;
        UpdateSprite();
    }
    
    public bool Activate(ActivationType activationType = ActivationType.Toggle)
    {
        switch (activationType)
        {
            case ActivationType.Use:
            case ActivationType.Toggle:
                _activated = !_activated;
                break;
            case ActivationType.Close:
            case ActivationType.Enable:
                _activated = true;
                break;
            case ActivationType.Open:
            case ActivationType.Disable:
                _activated = false;
                break;
            case ActivationType.Destroy:
                break;
        }
        UpdateSprite();
        return true;
    }

    private void UpdateSprite()
    {
        if (_activated)
        {
            this.Show();
        }
        else
        {
            EmitSignalDisabled();
            this.Hide();
        }
    }

    private void OnAreaEntered(Area2D area)
    {
        if (area is not InteractionController interactionController)
        {
            return;
        }
        _activated = false;
        UpdateSprite();
    }
}