MaskExport.php

<?php
namespace Bitrix\UI\Integration\Rest;
 
use \Bitrix\Main;
use \Bitrix\Main\Event;
use \Bitrix\Ui;
use \Bitrix\UI\Avatar;
 
class MaskExport extends ExportStep
{
    private const PAGE_SIZE = 1;
    public static function getSettings(Event $event): ?array
    {
        $step = $event->getParameter('STEP');
        $setting = $event->getParameter('SETTING');
        return [
            'SETTING' => $setting,
            'NEXT' => false
        ];
    }
 
    public function init(): void
    {
        $query = Avatar\Model\ItemTable::query()
            ->setFilter([
                '=OWNER_TYPE' => Avatar\Mask\Owner\User::class,
                '=OWNER_ID' => $this->entityId
            ])
            ->setSelect(['ID', 'FILE_ID', 'TITLE', 'DESCRIPTION', 'SORT'])
            ->setOrder(['ID' => 'ASC'])
            ->setLimit(static::PAGE_SIZE)
            ->setOffset($this->stepNumber * static::PAGE_SIZE)
            ->exec();
 
        while ($res = $query->fetch())
        {
            $this->data[] = $res;
            $this->files[] = ['ID' => $res['FILE_ID']];
        }
        if ($this->data->count() >= static::PAGE_SIZE)
        {
            $this->nextStep->set('last', $this->data->current());
        }
    }
}