Clear mage-cache-sessid on Ajax Login

This commit adds code based on
`Magento\Customer\Controller\Account\LoginPost::execute` that clears the
`mage-cache-sessid` cookie on login. This triggers a refresh of the
customer data in localStorage. The primary purpose is to make sure the
customer cart is properly loaded after login.

Author: Patrick McLain

app/code/Magento/Customer/Controller/Ajax/Login.php

@@ -13,6 +13,8 @@
 use Magento\Customer\Model\Account\Redirect as AccountRedirect;
 use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\Stdlib\CookieManagerInterface;
+use Magento\Framework\Stdlib\Cookie\CookieMetadataFactory;
 
 /**
  * Login controller
@@ -58,6 +60,16 @@ class Login extends \Magento\Framework\App\Action\Action
      */
     protected $scopeConfig;
 
+    /**
+     * @var CookieManagerInterface
+     */
+    protected $cookieManager;
+
+    /**
+     * @var CookieMetadataFactory
+     */
+    protected $cookieMetadataFactory;
+
     /**
      * Initialize Login controller
      *
@@ -67,21 +79,27 @@ class Login extends \Magento\Framework\App\Action\Action
      * @param AccountManagementInterface $customerAccountManagement
      * @param \Magento\Framework\Controller\Result\JsonFactory $resultJsonFactory
      * @param \Magento\Framework\Controller\Result\RawFactory $resultRawFactory
+     * @param CookieManagerInterface $cookieManager
+     * @param CookieMetadataFactory $cookieMetadataFactory
      */
     public function __construct(
         \Magento\Framework\App\Action\Context $context,
         \Magento\Customer\Model\Session $customerSession,
         \Magento\Framework\Json\Helper\Data $helper,
         AccountManagementInterface $customerAccountManagement,
         \Magento\Framework\Controller\Result\JsonFactory $resultJsonFactory,
-        \Magento\Framework\Controller\Result\RawFactory $resultRawFactory
+        \Magento\Framework\Controller\Result\RawFactory $resultRawFactory,
+        CookieManagerInterface $cookieManager,
+        CookieMetadataFactory $cookieMetadataFactory
     ) {
         parent::__construct($context);
         $this->customerSession = $customerSession;
         $this->helper = $helper;
         $this->customerAccountManagement = $customerAccountManagement;
         $this->resultJsonFactory = $resultJsonFactory;
         $this->resultRawFactory = $resultRawFactory;
+        $this->cookieManager = $cookieManager;
+        $this->cookieMetadataFactory = $cookieMetadataFactory;
     }
 
     /**
@@ -169,6 +187,11 @@ public function execute()
             $this->customerSession->setCustomerDataAsLoggedIn($customer);
             $this->customerSession->regenerateId();
             $redirectRoute = $this->getAccountRedirect()->getRedirectCookie();
+            if ($this->cookieManager->getCookie('mage-cache-sessid')) {
+                $metadata = $this->cookieMetadataFactory->createCookieMetadata();
+                $metadata->setPath('/');
+                $this->cookieManager->deleteCookie('mage-cache-sessid', $metadata);
+            }
             if (!$this->getScopeConfig()->getValue('customer/startup/redirect_dashboard') && $redirectRoute) {
                 $response['redirectUrl'] = $this->_redirect->success($redirectRoute);
                 $this->getAccountRedirect()->clearRedirectCookie();