#19345: Incorrect caching subscription status in newsletter plugin.

app/code/Magento/Newsletter/Model/CustomerSubscriberCache.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Newsletter\Model;
+
+/**
+ * This service provides caching Subscriber by Customer id.
+ */
+class CustomerSubscriberCache
+{
+    /**
+     * @var array
+     */
+    private $customerSubscriber = [];
+
+    /**
+     * Get Subscriber from cache by Customer id.
+     *
+     * @param int $customerId
+     * @return Subscriber|null
+     */
+    public function getCustomerSubscriber(int $customerId): ?Subscriber
+    {
+        $subscriber = null;
+        if (isset($this->customerSubscriber[$customerId])) {
+            $subscriber = $this->customerSubscriber[$customerId];
+        }
+
+        return $subscriber;
+    }
+
+    /**
+     * Set Subscriber to cache by Customer id.
+     *
+     * @param int $customerId
+     * @param Subscriber|null $subscriber
+     */
+    public function setCustomerSubscriber(int $customerId, ?Subscriber $subscriber): void
+    {
+        $this->customerSubscriber[$customerId] = $subscriber;
+    }
+}

app/code/Magento/Newsletter/Model/Plugin/CustomerPlugin.php

@@ -3,21 +3,24 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 namespace Magento\Newsletter\Model\Plugin;
 
 use Magento\Customer\Api\CustomerRepositoryInterface;
+use Magento\Customer\Api\Data\CustomerExtensionInterface;
 use Magento\Customer\Api\Data\CustomerInterface;
 use Magento\Customer\Model\Config\Share;
 use Magento\Framework\Api\ExtensionAttributesFactory;
+use Magento\Framework\Api\SearchResults;
+use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Exception\NoSuchEntityException;
-use Magento\Newsletter\Model\Subscriber;
+use Magento\Newsletter\Model\CustomerSubscriberCache;
 use Magento\Newsletter\Model\ResourceModel\Subscriber\CollectionFactory;
-use Magento\Customer\Api\Data\CustomerExtensionInterface;
+use Magento\Newsletter\Model\Subscriber;
 use Magento\Newsletter\Model\SubscriberFactory;
 use Magento\Newsletter\Model\SubscriptionManagerInterface;
 use Magento\Store\Model\Store;
 use Magento\Store\Model\StoreManagerInterface;
-use Magento\Framework\Api\SearchResults;
 use Psr\Log\LoggerInterface;
 
 /**
@@ -62,6 +65,11 @@ class CustomerPlugin
      */
     private $logger;
 
+    /**
+     * @var CustomerSubscriberCache
+     */
+    private $customerSubscriberCache;
+
     /**
      * @param SubscriberFactory $subscriberFactory
      * @param ExtensionAttributesFactory $extensionFactory
@@ -70,6 +78,7 @@ class CustomerPlugin
      * @param Share $shareConfig
      * @param StoreManagerInterface $storeManager
      * @param LoggerInterface $logger
+     * @param CustomerSubscriberCache|null $customerSubscriberCache
      */
     public function __construct(
         SubscriberFactory $subscriberFactory,
@@ -78,7 +87,8 @@ public function __construct(
         SubscriptionManagerInterface $subscriptionManager,
         Share $shareConfig,
         StoreManagerInterface $storeManager,
-        LoggerInterface $logger
+        LoggerInterface $logger,
+        CustomerSubscriberCache $customerSubscriberCache = null
     ) {
         $this->subscriberFactory = $subscriberFactory;
         $this->extensionFactory = $extensionFactory;
@@ -87,6 +97,8 @@ public function __construct(
         $this->shareConfig = $shareConfig;
         $this->storeManager = $storeManager;
         $this->logger = $logger;
+        $this->customerSubscriberCache = $customerSubscriberCache
+            ?? ObjectManager::getInstance()->get(CustomerSubscriberCache::class);
     }
 
     /**
@@ -124,9 +136,11 @@ public function afterSave(
         }
         if ($needToUpdate) {
             $storeId = $this->getCurrentStoreId($result);
+            $customerId = (int)$result->getId();
             $subscriber = $subscribeStatus
-                ? $this->subscriptionManager->subscribeCustomer((int)$result->getId(), $storeId)
-                : $this->subscriptionManager->unsubscribeCustomer((int)$result->getId(), $storeId);
+                ? $this->subscriptionManager->subscribeCustomer($customerId, $storeId)
+                : $this->subscriptionManager->unsubscribeCustomer($customerId, $storeId);
+            $this->customerSubscriberCache->setCustomerSubscriber($customerId, $subscriber);
         }
         $this->addIsSubscribedExtensionAttribute($result, $subscriber->isSubscribed());
 
@@ -252,7 +266,7 @@ public function afterGetList(CustomerRepositoryInterface $subject, SearchResults
             $extensionAttributes = $customer->getExtensionAttributes();
             /** @var Subscriber $subscribe */
             $subscribe = $collection->getItemByColumnValue('subscriber_email', $customer->getEmail());
-            $isSubscribed = $subscribe && (int) $subscribe->getStatus() === Subscriber::STATUS_SUBSCRIBED;
+            $isSubscribed = $subscribe && (int)$subscribe->getStatus() === Subscriber::STATUS_SUBSCRIBED;
             $extensionAttributes->setIsSubscribed($isSubscribed);
         }
 
@@ -308,16 +322,20 @@ private function deleteSubscriptionsAfterCustomerDelete(CustomerInterface $custo
      */
     private function getSubscriber(CustomerInterface $customer): Subscriber
     {
-        /** @var Subscriber $subscriber */
-        $subscriber = $this->subscriberFactory->create();
-        $websiteId = $this->getCurrentWebsiteId($customer);
-        $subscriber->loadByCustomer((int)$customer->getId(), $websiteId);
-        /**
-         * If subscriber was't found by customer id then try to find subscriber by customer email.
-         * It need when the customer is creating and he has already subscribed as guest by same email.
-         */
-        if (!$subscriber->getId()) {
-            $subscriber->loadBySubscriberEmail((string)$customer->getEmail(), $websiteId);
+        $customerId = (int)$customer->getId();
+        $subscriber = $this->customerSubscriberCache->getCustomerSubscriber($customerId);
+        if ($subscriber === null) {
+            $subscriber = $this->subscriberFactory->create();
+            $websiteId = $this->getCurrentWebsiteId($customer);
+            $subscriber->loadByCustomer((int)$customer->getId(), $websiteId);
+            /**
+             * If subscriber wasn't found by customer id then try to find subscriber by customer email.
+             * It need when the customer is creating and he has already subscribed as guest by same email.
+             */
+            if (!$subscriber->getId()) {
+                $subscriber->loadBySubscriberEmail((string)$customer->getEmail(), $websiteId);
+            }
+            $this->customerSubscriberCache->setCustomerSubscriber($customerId, $subscriber);
         }
 
         return $subscriber;

app/code/Magento/Newsletter/Model/SubscriptionManager.php

@@ -11,6 +11,7 @@
 use Magento\Customer\Api\CustomerRepositoryInterface;
 use Magento\Customer\Api\Data\CustomerInterface;
 use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\ObjectManager;
 use Magento\Framework\Exception\MailException;
 use Magento\Store\Model\ScopeInterface;
 use Magento\Store\Model\StoreManagerInterface;
@@ -51,28 +52,37 @@ class SubscriptionManager implements SubscriptionManagerInterface
      */
     private $customerRepository;
 
+    /**
+     * @var CustomerSubscriberCache
+     */
+    private $customerSubscriberCache;
+
     /**
      * @param SubscriberFactory $subscriberFactory
      * @param LoggerInterface $logger
      * @param StoreManagerInterface $storeManager
      * @param ScopeConfigInterface $scopeConfig
      * @param AccountManagementInterface $customerAccountManagement
      * @param CustomerRepositoryInterface $customerRepository
+     * @param CustomerSubscriberCache|null $customerSubscriberCache
      */
     public function __construct(
         SubscriberFactory $subscriberFactory,
         LoggerInterface $logger,
         StoreManagerInterface $storeManager,
         ScopeConfigInterface $scopeConfig,
         AccountManagementInterface $customerAccountManagement,
-        CustomerRepositoryInterface $customerRepository
+        CustomerRepositoryInterface $customerRepository,
+        CustomerSubscriberCache $customerSubscriberCache = null
     ) {
         $this->subscriberFactory = $subscriberFactory;
         $this->logger = $logger;
         $this->storeManager = $storeManager;
         $this->scopeConfig = $scopeConfig;
         $this->customerAccountManagement = $customerAccountManagement;
         $this->customerRepository = $customerRepository;
+        $this->customerSubscriberCache = $customerSubscriberCache
+            ?? ObjectManager::getInstance()->get(CustomerSubscriberCache::class);
     }
 
     /**
@@ -209,14 +219,16 @@ private function saveSubscriber(
         if (!$subscriber->getId()) {
             $subscriber->setSubscriberConfirmCode($subscriber->randomSequence());
         }
+        $customerId = (int)$customer->getId();
         $subscriber->setStatus($status)
             ->setStatusChanged($statusChanged)
-            ->setCustomerId($customer->getId())
+            ->setCustomerId($customerId)
             ->setStoreId($storeId)
             ->setEmail($customer->getEmail())
             ->save();
 
         if ($statusChanged) {
+            $this->customerSubscriberCache->setCustomerSubscriber($customerId, null);
             return true;
         }