baseevent.php

См. документацию.

<?php
 
namespace Bitrix\Calendar\Internals\EventManager;
 
use Bitrix\Calendar\Core\Common;
use Bitrix\Calendar\Internals\EventManager\EventSubscriber\EventSubscriberInterface;
use Bitrix\Main\DI\ServiceLocator;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
 
abstract class BaseEvent
{
    protected static array $subscribers = [];

    public function emit(): array
    {
        foreach ($this->getSubscribers() as $subscriber)
        {
            self::$subscribers[$this::getEventType()] ??= [];
 
            if (!empty(self::$subscribers[$this::getEventType()][$subscriber::class]))
            {
                continue;
            }
 
            ServiceLocator::getInstance()->get(EventManagerInterface::class)->addEventHandler(
                fromModuleId: $this::getModuleId(),
                eventType: $this::getEventType(),
                callback: $subscriber,
            );
 
            self::$subscribers[$this::getEventType()][$subscriber::class] = $subscriber::class;
        }
 
        return $this->send($this->buildEvent());
    }
 
    protected function send(Event $event): array
    {
        $eventManager = ServiceLocator::getInstance()->get(EventManagerInterface::class);
        $eventManager->send($event);
 
        return $event->getResults();
    }
 
    protected function buildEvent(): Event
    {
        return new Event($this::getModuleId(), $this::getEventType(), $this->getEventParams());
    }
 
    public static function getModuleId(): string
    {
        return Common::CALENDAR_MODULE_ID;
    }
 
    abstract public static function getEventType(): string;
 
    abstract protected function getEventParams(): array;

    protected function getSubscribers(): array
    {
        return [];
    }
}