Event.php

См. документацию.

<?php
 
namespace Bitrix\Catalog\v2\Event;
 
final class Event
{
    // Option region
    private const MODULE_ID = 'Catalog';
    private const EVENT_NAME_START_WITH = 'on';
 
    // Entity region
    public const ENTITY_PRODUCT = 'Product';
 
    // Method region
    public const METHOD_UPDATE = 'Update';
 
    // Stage region
    public const STAGE_BEFORE = 'Before';
    public const STAGE_ON = '';
    public const STAGE_AFTER = 'After';
 
    public static function send(string $entity, string $method, string $stage, array $parameters): void
    {
        $eventName = Event::makeEventName($entity, $method, $stage);
 
        $eventHandler = new \Bitrix\Main\Event(Event::MODULE_ID, $eventName, $parameters);
 
        $eventHandler->send();
    }
 
    public static function makeEventName(string $entity, string $method, string $stage): string
    {
        return Event::EVENT_NAME_START_WITH . $stage . Event::MODULE_ID . $entity . $method;
    }
}