callback.php

См. документацию.

<?php
 
namespace Bitrix\Rest\UserField;
 
 
use Bitrix\Main\EventManager;
use Bitrix\Rest\Api\UserFieldType;
use Bitrix\Rest\PlacementTable;
 
class Callback
{
    const USER_TYPE_ID_PREFIX = 'rest';
 
    protected static $descriptionCache = null;
 
    public static function __callStatic($handlerCode, $arguments)
    {
        $userTypeDescription = static::getUserTypeDescription($handlerCode);
 
        if($userTypeDescription === null)
        {
            static::unbindByCode($handlerCode);
        }
 
        return $userTypeDescription;
    }
 
    public static function bind($fields)
    {
        global $USER_FIELD_MANAGER;
 
        $eventManager = EventManager::getInstance();
        $eventManager->registerEventHandlerCompatible('main', 'OnUserTypeBuildList', 'rest', __CLASS__, static::getUserTypeId($fields));
 
        $USER_FIELD_MANAGER->CleanCache();
        static::$descriptionCache = null;
        \Bitrix\Rest\PlacementTable::clearHandlerCache();
    }
 
    public static function unbind($fields)
    {
        static::unbindByCode(static::getUserTypeId($fields));
    }
 
    public static function unbindByCode($handlerCode)
    {
        global $USER_FIELD_MANAGER;
 
        $eventManager = EventManager::getInstance();
        $eventManager->unRegisterEventHandler('main', 'OnUserTypeBuildList', 'rest', __CLASS__, $handlerCode);
 
        $USER_FIELD_MANAGER->CleanCache();
        static::$descriptionCache = null;
        \Bitrix\Rest\PlacementTable::clearHandlerCache();
    }
 
    protected static function getUserTypeDescription($placementHandlerCode)
    {
        if(static::$descriptionCache === null)
        {
            static::$descriptionCache = array();
 
            $placementHandlerList = PlacementTable::getHandlersList(UserFieldType::PLACEMENT_UF_TYPE, true);
            foreach($placementHandlerList as $placementInfo)
            {
                static::$descriptionCache[static::getUserTypeId($placementInfo)] = array(
                    'USER_TYPE_ID' => static::getUserTypeId($placementInfo),
                    'CLASS_NAME' => '\Bitrix\Rest\UserField\Type',
                    'DESCRIPTION' => $placementInfo['TITLE'],
                    'BASE_TYPE' => \CUserTypeManager::BASE_TYPE_STRING,
                    'VIEW_CALLBACK' => array('\Bitrix\Rest\UserField\Type', 'getPublicView'),
                    'EDIT_CALLBACK' => array('\Bitrix\Rest\UserField\Type', 'getPublicEdit'),
                );
            }
        }
 
        return array_key_exists($placementHandlerCode, static::$descriptionCache)
            ? static::$descriptionCache[$placementHandlerCode]
            : null;
    }
 
    public static function getUserTypeId($userTypeInfo)
    {
        return static::USER_TYPE_ID_PREFIX.'_'.$userTypeInfo['APP_ID'].'_'.$userTypeInfo['ADDITIONAL'];
    }
}