/**
* Retrieve block cache tags
*
* @return array
*/
public function getCacheTags()
{
return array_merge(parent::getCacheTags(), $this->getItemsTags($this->getItemCollection()));
}
/**
* Retrieve array of cross-sell products
*
* @return array
*/
public function getItemCollection()
{
if (is_null($this->_items)) {
// if has just added product to cart - load cross-sell products for it
$productsByLastAdded = $this->_getProductsByLastAddedProduct();
$limit = $this->getPositionLimit();
if (count($productsByLastAdded) < $limit) {
// reset collection
$this->_linkCollection = null;
parent::getItemCollection();
// products by last added are preferable
$this->_items = $productsByLastAdded + $this->_items;
$this->_sliceItems();
} else {
$this->_items = $productsByLastAdded;
}
$this->_orderProductItems();
}
return $this->_items;
}
/**
* Retrieve block cache tags
*
* @return array
*/
public function getCacheTags()
{
$tags = parent::getCacheTags();
$ids = $this->getAllIds();
if (!empty($ids)) {
foreach ($ids as $id) {
$tags[] = Mage_Catalog_Model_Product::CACHE_TAG . '_' . $id;
}
}
return $tags;
}
