/**
* Calculate count of wishlist items and put value to customer session.
* Method called after wishlist modifications and trigger 'wishlist_items_renewed' event.
* Depends from configuration.
*
* @return $this
*/
public function calculate()
{
$count = 0;
if ($this->getCustomer()) {
$collection = $this->getWishlistItemCollection()->setInStockFilter(true);
if ($this->scopeConfig->getValue(self::XML_PATH_WISHLIST_LINK_USE_QTY, \Magento\Store\Model\ScopeInterface::SCOPE_STORE)) {
$count = $collection->getItemsQty();
} else {
$count = $collection->getSize();
}
$this->_customerSession->setWishlistDisplayType($this->scopeConfig->getValue(self::XML_PATH_WISHLIST_LINK_USE_QTY, \Magento\Store\Model\ScopeInterface::SCOPE_STORE));
$this->_customerSession->setDisplayOutOfStockProducts($this->scopeConfig->getValue(self::XML_PATH_CATALOGINVENTORY_SHOW_OUT_OF_STOCK, \Magento\Store\Model\ScopeInterface::SCOPE_STORE));
}
$this->_customerSession->setWishlistItemCount($count);
$this->_eventManager->dispatch('wishlist_items_renewed');
return $this;
}