landing.php

См. документацию.

<?php
namespace Bitrix\Landing\Restriction;
 
use \Bitrix\Bitrix24\Feature;
use \Bitrix\Main\Entity;
 
class Landing
{
    public static function isCreatingAllowed(string $code, array $params): bool
    {
        if (!\Bitrix\Main\Loader::includeModule('bitrix24'))
        {
            return true;
        }
 
        $optPrefix = 'landing_page_';
        $optSuffix = ($params['action_type'] == 'publication') ? '_publication' : '';
        $variableCode = $optPrefix . strtolower($params['type']) . $optSuffix;
        $limit = (int) Feature::getVariable($variableCode);
 
        if ($limit)
        {
            $filter = [
                'CHECK_PERMISSIONS' => 'N',
                '=SITE.TYPE' => $params['type'],
                '!=SITE.SPECIAL' => 'Y'
            ];
            if ($params['action_type'] == 'publication')
            {
                $filter['=ACTIVE'] = 'Y';
            }
            if (
                isset($params['filter']) &&
                is_array($params['filter'])
            )
            {
                $filter = array_merge(
                    $filter,
                    $params['filter']
                );
            }
            $check = \Bitrix\Landing\Landing::getList([
                'select' => [
                    'CNT' => new Entity\ExpressionField('CNT', 'COUNT(*)')
                ],
                'filter' => $filter,
                'group' => []
            ])->fetch();
            if ($check && $check['CNT'] >= $limit)
            {
                return false;
            }
        }
 
        return true;
    }
}