calculatetotalcountaction.php

См. документацию.

<?php
 
namespace Bitrix\Main\Grid\Action;
 
use Bitrix\Main\HttpRequest;
use Bitrix\Main\Result;
use Bitrix\Main\UI\PageNavigation;
use Closure;
 
final class CalculateTotalCountAction implements Action
{
    public function __construct(
        private readonly Closure $calculator,
        private readonly PageNavigation $pagination,
    )
    {}

    public static function getId(): string
    {
        return 'get_total_rows_count';
    }

    public function processRequest(HttpRequest $request): ?Result
    {
        $totalCount = $this->calculator->__invoke();
 
        $this->pagination->setRecordCount($totalCount);
 
        $result = new Result();
        $result->setData([
            'totalCount' => $totalCount,
        ]);
 
        return $result;
    }
}