Base::bigDataLoadAction

protected function bigDataLoadAction()
{
	$this->initBigDataLastUsage();
	$this->productIds = $this->getBigDataProductIds();

	// if no products - show empty response
	if (empty($this->productIds))
	{
		static::sendJsonAnswer();
	}

	$this->productIdMap = $this->getProductIdMap($this->productIds);
	$this->loadData();
}