ACP2E-748: Layered navigation filters don't work when "show out of stock" is enabled

Author: pradeep1819

app/code/Magento/CatalogInventory/Model/StockStatusApplier.php

@@ -0,0 +1,45 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\CatalogInventory\Model;
+
+/**
+ * Search Result Applier getters and setters
+ *
+ * @deprecated - as the implementation has been reverted during the fix of ACP2E-748
+ */
+class StockStatusApplier implements StockStatusApplierInterface
+{
+    /**
+     * Storefront search result applier flag
+     *
+     * @var bool
+     */
+    private $searchResultApplier = false;
+
+    /**
+     * Set flag, if the request is originated from SearchResultApplier
+     *
+     * @param bool $status
+     * @deprecated
+     */
+    public function setSearchResultApplier(bool $status): void
+    {
+        $this->searchResultApplier = $status;
+    }
+
+    /**
+     * Get flag, if the request is originated from SearchResultApplier
+     *
+     * @return bool
+     * @deprecated
+     */
+    public function hasSearchResultApplier() : bool
+    {
+        return $this->searchResultApplier;
+    }
+}

app/code/Magento/CatalogInventory/Model/StockStatusApplierInterface.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\CatalogInventory\Model;
+
+/**
+ * Search Result Applier interface.
+ *
+ * @deprecated - as the implementation has been reverted during the fix of ACP2E-748
+ */
+interface StockStatusApplierInterface
+{
+
+    /**
+     * Set flag, if the request is originated from SearchResultApplier
+     *
+     * @param bool $status
+     * @deprecated
+     */
+    public function setSearchResultApplier(bool $status): void;
+
+    /**
+     * Get flag, if the request is originated from SearchResultApplier
+     *
+     * @return bool
+     * @deprecated
+     */
+    public function hasSearchResultApplier() : bool;
+}

app/code/Magento/CatalogInventory/etc/di.xml

@@ -33,6 +33,7 @@
 
     <preference for="Magento\CatalogInventory\Model\ResourceModel\QtyCounterInterface" type="Magento\CatalogInventory\Model\ResourceModel\Stock" />
     <preference for="Magento\CatalogInventory\Model\ResourceModel\StockStatusFilterInterface" type="Magento\CatalogInventory\Model\ResourceModel\StockStatusFilter" />
+    <preference for="Magento\CatalogInventory\Model\StockStatusApplierInterface" type="Magento\CatalogInventory\Model\StockStatusApplier" />
     <type name="Magento\Catalog\Model\Product\Attribute\Repository">
         <plugin name="filterCustomAttribute" type="Magento\CatalogInventory\Model\Plugin\FilterCustomAttribute" />
     </type>