/**
* Add user selected products.
*
* @param CategoryInterface $category Category.
*
* @return $this
*/
private function addSelectedProducts(CategoryInterface $category)
{
$selectedProducts = $this->getRequest()->getParam('selected_products', []);
$addedProducts = isset($selectedProducts['added_products']) ? $selectedProducts['added_products'] : [];
$category->setAddedProductIds($addedProducts);
$deletedProducts = isset($selectedProducts['deleted_products']) ? $selectedProducts['deleted_products'] : [];
$category->setDeletedProductIds($deletedProducts);
return $this;
}