eventmanager.php

<?php
namespace Bitrix\Main\ORM;
 
use Bitrix\Main\ArgumentException;
use Bitrix\Main\ORM\Data\DataManager;
use Bitrix\Main\ORM\Objectify\EntityObject;
 
class EventManager
{
    protected static $instance;
 
    protected function __construct()
    {
    }
 
    public static function getInstance()
    {
        if (!isset(self::$instance))
        {
            $c = __CLASS__;
            self::$instance = new $c;
        }
 
        return self::$instance;
    }
 
    public function addEventHandler($entity, $eventType, $callback, $includeFile = false, $sort = 100)
    {
        $entity = static::obtainEntity($entity);
        $eventType = static::obtainEventType($entity, $eventType);
 
        // subscribe
        return \Bitrix\Main\EventManager::getInstance()
            ->addEventHandler($entity->getModule(), $eventType, $callback, $includeFile, $sort);
    }
 
    public function removeEventHandler($entity, $eventType, $iEventHandlerKey)
    {
        $entity = static::obtainEntity($entity);
        $eventType = static::obtainEventType($entity, $eventType);
 
        // unsubscribe
        return \Bitrix\Main\EventManager::getInstance()
            ->removeEventHandler($entity->getModule(), $eventType, $iEventHandlerKey);
    }
 
    public function registerEventHandler($entity, $eventType, $toModuleId, $toClass = "", $toMethod = "", $sort = 100, $toPath = "", $toMethodArg = [])
    {
        $entity = static::obtainEntity($entity);
        $eventType = static::obtainEventType($entity, $eventType);
 
        // subscribe
        \Bitrix\Main\EventManager::getInstance()
            ->registerEventHandler($entity->getModule(), $eventType, $toModuleId, $toClass, $toMethod, $sort, $toPath, $toMethodArg);
    }
 
    public function unRegisterEventHandler($entity, $eventType, $toModuleId, $toClass = "", $toMethod = "", $toPath = "", $toMethodArg = [])
    {
        $entity = static::obtainEntity($entity);
        $eventType = static::obtainEventType($entity, $eventType);
 
        // unsubscribe
        \Bitrix\Main\EventManager::getInstance()
            ->unRegisterEventHandler($entity->getModule(), $eventType, $toModuleId, $toClass, $toMethod, $toPath, $toMethodArg);
    }
 
    protected static function obtainEntity($entity)
    {
        // define entity
        if ($entity instanceof Entity)
        {
            // ok
        }
        elseif (is_subclass_of($entity, DataManager::class))
        {
            $entity = $entity::getEntity();
        }
        elseif (is_subclass_of($entity, EntityObject::class))
        {
            $dataClass = $entity::$dataClass;
            $entity = $dataClass::getEntity();
        }
        else
        {
            throw new ArgumentException('Unknown entity value');
        }
 
        return $entity;
    }
 
    protected static function obtainEventType($entity, $eventType)
    {
        if (!in_array($eventType, [
            DataManager::EVENT_ON_BEFORE_ADD,
            DataManager::EVENT_ON_ADD,
            DataManager::EVENT_ON_AFTER_ADD,
            DataManager::EVENT_ON_BEFORE_UPDATE,
            DataManager::EVENT_ON_UPDATE,
            DataManager::EVENT_ON_AFTER_UPDATE,
            DataManager::EVENT_ON_BEFORE_DELETE,
            DataManager::EVENT_ON_DELETE,
            DataManager::EVENT_ON_AFTER_DELETE,
        ], true))
        {
            throw new ArgumentException("Unknown event type `{$eventType}`");
        }
 
        return $entity->getNamespace() . $entity->getName() . '::' . $eventType;
    }
}