userfield.php

См. документацию.

<?php
 
namespace Bitrix\Main\Rest;
 
use Bitrix\Rest\Event\EventBind;
use Bitrix\Rest\Event\EventBindInterface;
use Bitrix\Rest\RestException;
 
class UserField implements EventBindInterface
{
    const EVENT_ON_AFTER_ADD = 'OnAfterUserTypeAdd';
    const EVENT_ON_AFTER_UPDATE = 'OnAfterUserTypeUpdate';
    const EVENT_ON_AFTER_DELETE = 'OnAfterUserTypeDelete';

    public static function getHandlers(): array
    {
        return (new EventBind(self::class))->getHandlers(static::getBindings());
    }

    protected static function getBindings(): array
    {
        return [
            self::EVENT_ON_AFTER_ADD => 'main.on.user.type.add',
            self::EVENT_ON_AFTER_UPDATE => 'main.on.user.type.update',
            self::EVENT_ON_AFTER_DELETE => 'main.on.user.type.delete',
        ];
    }

    public static function getCallbackRestEvent(): array
    {
        return [self::class, 'processItemEvent'];
    }

    public static function processItemEvent(array $arParams, array $arHandler): array
    {
        $item = $arParams[0] ?? null;
        $id = $arParams[1] ?? null;
 
        $id = $id?:$item['ID'];
 
        if (!$id)
        {
            throw new RestException('id not found trying to process event');
        }
 
        return [
            'FIELDS' => [
                'ID' => $id
            ],
        ];
    }
}