AC-13671 : New files added for REST API fix

Author: del02433

app/code/Magento/Catalog/Model/Plugin/SpecialPricePluginForREST/SpecialPriceStoragePlugin.php

@@ -0,0 +1,57 @@
+<?php
+/**
+ * Copyright 2025 Adobe
+ * All Rights Reserved.
+ */
+namespace Magento\Catalog\Model\Plugin\SpecialPricePluginForREST;
+
+use Magento\Catalog\Model\Product\Price\SpecialPriceStorage;
+use Magento\Store\Model\StoreManagerInterface;
+
+/**
+ * Special price storage Plugin to handle website scope issue at the frontend (only for REST API calls)
+ * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
+ */
+class SpecialPriceStoragePlugin
+{
+    public function __construct(
+        private StoreManagerInterface $storeManager
+    ) {}
+
+    public function aroundUpdate(SpecialPriceStorage $subject, callable $proceed, array $prices)
+    {
+        $prices = $this->applyWebsitePrices($prices);
+        return $proceed($prices);
+    }
+
+    private function applyWebsitePrices(array $formattedPrices): array
+    {
+        $newPrices = [];
+
+        foreach ($formattedPrices as $price) {
+            // Add the original price first
+            $newPrices[] = $price;
+
+            if ($price->getStoreId() == \Magento\Store\Model\Store::DEFAULT_STORE_ID) {
+                continue;
+            }
+
+            $store = $this->storeManager->getStore($price->getStoreId());
+            $website = $store->getWebsite();
+            $storeIds = $website->getStoreIds();
+
+            // Unset origin store view to avoid duplication
+            unset($storeIds[$price->getStoreId()]);
+
+            foreach ($storeIds as $storeId) {
+                /** @var \Magento\Catalog\Model\Product\Price\SpecialPrice $cloned */
+                $cloned = clone $price;
+                $cloned->setStoreId((int) $storeId);
+                $newPrices[] = $cloned;
+            }
+        }
+
+        return $newPrices;
+    }
+
+}

app/code/Magento/Catalog/etc/webapi_rest/di.xml

@@ -47,4 +47,8 @@
     <type name="Magento\Catalog\Model\CategoryRepository">
         <plugin name="format_category_url_key_rest_api" type="Magento\Catalog\Plugin\Model\CategoryRepositoryPlugin" />
     </type>
+    <type name="Magento\Catalog\Model\Product\Price\SpecialPriceStorage">
+        <plugin name="vendor_special_price_rest_plugin"
+                type="Magento\Catalog\Model\Plugin\SpecialPricePluginForREST\SpecialPriceStoragePlugin" />
+    </type>
 </config>