Factory.php

См. документацию.

<?php
 
namespace Bitrix\Calendar\Relation\Strategy;
 
use Bitrix\Calendar\Core\Event\Event;
use Bitrix\Calendar\Core\Event\Tools\Dictionary;
 
class Factory
{
    protected static ?Factory $instance = null;
 
    public static function getInstance(): Factory
    {
        if (self::$instance === null)
        {
            self::$instance = new self();
        }
 
        return self::$instance;
    }
 
    private function __construct()
    {}
 
    public function getStrategy(int $userId, Event $event): RelationStrategy
    {
        if ($event->getSpecialLabel() === Dictionary::EVENT_TYPE['shared_crm'])
        {
            return new CrmSharingStrategy($userId, $event);
        }
 
        return new NullStrategy($userId, $event);
    }
}