CAllCrmCatalog::Add

static function Add($arFields)
{
	if (!Loader::includeModule('catalog'))
	{
		return false;
	}

	self::$LAST_ERROR = '';
	global $DB;
	$tableName = CCrmCatalog::TABLE_NAME;

	if (!self::CheckFields('ADD', $arFields, 0))
	{
		return false;
	}

	$DB->Add($tableName, $arFields, array(), '', false, 'File: '.__FILE__.'
Line: '.__LINE__);

	if($DB->db_Error <> '')
	{
		self::RegisterError($DB->db_Error);
		return false;
	}

	// -------------- register in catalog module -------------->
	$catalogId = $arFields['ID'];
	$arFields = array(
		'IBLOCK_ID' => $catalogId
	);

	// get default vat
	// TODO: replace this code to use preset vat id
	$defCatVatId = 0;
	$iterator = \Bitrix\Catalog\VatTable::getList([
		'select' => ['ID', 'SORT'],
		'order' => ['SORT' => 'ASC'],
		'limit' => 1
	]);
	$vat = $iterator->fetch();
	if (!empty($vat))
	{
		$defCatVatId = (int)$vat['ID'];
	}
	unset($vat, $iterator);
	if ($defCatVatId > 0)
	{
		$arFields['VAT_ID'] = $defCatVatId;
	}
	unset($defCatVatId);

	// add crm iblock to catalog
	$CCatalog = new CCatalog();
	$dbRes = $CCatalog->GetList(array(), array('ID' => $catalogId), false, false, array('ID'));
	if (!$dbRes->Fetch())    // if catalog iblock is not exists
	{
		if ($CCatalog->Add($arFields))
		{
			COption::SetOptionString('catalog', 'save_product_without_price', 'Y');
			COption::SetOptionString('catalog', 'default_can_buy_zero', 'Y');
		}
		else
		{
			self::RegisterError(GetMessage('CRM_ERR_REGISTER_CATALOG'));
			return false;
		}
	}
	// <------------- register in catalog module --------------

	return true;
}