<?php
/**
 * Trigger registry (docs/20 §11).
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Domain\Automation;

/**
 * Typed trigger collection.
 *
 * @since 0.1.0
 */
final class AutomationTriggerRegistry {

	/**
	 * Triggers keyed by identifier.
	 *
	 * @var array<string, AutomationTrigger>
	 */
	private array $items = [];

	/**
	 * Register.
	 *
	 * @param AutomationTrigger $trigger Trigger.
	 *
	 * @since 0.1.0
	 */
	public function register( AutomationTrigger $trigger ): void {
		$this->items[ $trigger->identifier() ] = $trigger;
	}

	/**
	 * Find.
	 *
	 * @param string $identifier Identifier.
	 *
	 * @since 0.1.0
	 */
	public function get( string $identifier ): ?AutomationTrigger {
		return $this->items[ $identifier ] ?? null;
	}

	/**
	 * All.
	 *
	 * @return list<AutomationTrigger>
	 *
	 * @since 0.1.0
	 */
	public function all(): array {
		return array_values( $this->items );
	}
}