<?php

declare(strict_types=1);

namespace Sarcio\WordPress\Extension;

use Sarcio\WordPress\Assistant\Overlay;

/**
 * The chat preview's overlay as an extension may touch it: its own slot in
 * `Overlay::$extensions`, through `Preview` only, never the overlay itself.
 *
 * @internal
 */
final class OverlayPreview implements Preview
{
    public function __construct(private readonly Overlay $overlay, private readonly string $ability)
    {
    }

    public function staged(): mixed
    {
        return $this->overlay->extensions[$this->ability] ?? null;
    }

    public function stage(mixed $value): void
    {
        $this->overlay->extensions[$this->ability] = $value;
    }
}