/**
* Calculate cache product compare collection
*
* @param bool $logout
* @return $this
*/
public function calculate($logout = false)
{
/** @var $collection Collection */
$collection = $this->_itemCollectionFactory->create()->useProductItem(true);
if (!$logout && $this->_customerSession->isLoggedIn()) {
$collection->setCustomerId($this->_customerSession->getCustomerId());
} elseif ($this->_customerId) {
$collection->setCustomerId($this->_customerId);
} else {
$collection->setVisitorId($this->_logVisitor->getId());
}
/* Price data is added to consider item stock status using price index */
$collection->addPriceData()->setVisibility($this->_catalogProductVisibility->getVisibleInSiteIds());
$count = $collection->getSize();
$this->_catalogSession->setCatalogCompareItemsCount($count);
return $this;
}
