elastic-inventory-2-3-2.diff

diff --git a/vendor/magento/module-catalog-inventory/Model/Plugin/Layer.php b/app/code/Magento/CatalogInventory/Model/Plugin/Layer.php
new file mode 100644
index 00000000000..b8e8e47bb1f
--- /dev/null
+++ b/vendor/magento/module-catalog-inventory/Model/Plugin/Layer.php
@@ -0,0 +1,67 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\CatalogInventory\Model\Plugin;
+
+class Layer
+{
+    /**
+     * Stock status instance
+     *
+     * @var \Magento\CatalogInventory\Helper\Stock
+     */
+    protected $stockHelper;
+
+    /**
+     * Store config instance
+     *
+     * @var \Magento\Framework\App\Config\ScopeConfigInterface
+     */
+    protected $scopeConfig;
+
+    /**
+     * @param \Magento\CatalogInventory\Helper\Stock $stockHelper
+     * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
+     */
+    public function __construct(
+        \Magento\CatalogInventory\Helper\Stock $stockHelper,
+        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
+    ) {
+        $this->stockHelper = $stockHelper;
+        $this->scopeConfig = $scopeConfig;
+    }
+
+    /**
+     * Before prepare product collection handler
+     *
+     * @param \Magento\Catalog\Model\Layer $subject
+     * @param \Magento\Catalog\Model\ResourceModel\Collection\AbstractCollection $collection
+     *
+     * @return void
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     */
+    public function beforePrepareProductCollection(
+        \Magento\Catalog\Model\Layer $subject,
+        \Magento\Catalog\Model\ResourceModel\Collection\AbstractCollection $collection
+    ) {
+        if ($this->_isEnabledShowOutOfStock()) {
+            return;
+        }
+        $this->stockHelper->addIsInStockFilterToCollection($collection);
+    }
+
+    /**
+     * Get config value for 'display out of stock' option
+     *
+     * @return bool
+     */
+    protected function _isEnabledShowOutOfStock()
+    {
+        return $this->scopeConfig->isSetFlag(
+            'cataloginventory/options/show_out_of_stock',
+            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
+        );
+    }
+}