<?php
/**
 * Conditions registry.
 *
 * @package Extrova
 */

declare( strict_types=1 );

namespace Extrova\Registry;

use Extrova\Rules\ConditionInterface;
use Extrova\Rules\SubtotalCondition;

defined( 'ABSPATH' ) || exit;

/**
 * Registry of rule conditions. The Lite registers only `subtotal`.
 *
 * @since 1.0.0
 */
final class ConditionRegistry extends AbstractRegistry {

	/**
	 * {@inheritDoc}
	 */
	protected function defaults(): array {
		return array(
			'subtotal' => new SubtotalCondition(),
		);
	}

	/**
	 * Hook: `extrova_register_conditions` ( array $conditions ): array — `slug => ConditionInterface`.
	 *
	 * @since 1.0.0
	 */
	protected function filter_name(): string {
		return 'extrova_register_conditions';
	}

	/**
	 * {@inheritDoc}
	 *
	 * @param mixed $item Item.
	 */
	protected function accepts( mixed $item ): bool {
		return $item instanceof ConditionInterface;
	}

	/**
	 * Condition by slug.
	 *
	 * @param string $slug Slug.
	 */
	public function get( string $slug ): ?ConditionInterface {
		return $this->all()[ $slug ] ?? null;
	}
}