ACP2E-2620: In admin, the "Shopping Cart" on left side doesn't get updated when selecting the items and "Move to Shopping Cart" from the right side

 - Changed the implementation based on QA comments.

Author: devarul

app/code/Magento/Sales/Model/AdminOrder/Create.php

@@ -20,6 +20,7 @@
 use Magento\Store\Model\StoreManagerInterface;
 use Psr\Log\LoggerInterface;
 use Magento\Quote\Model\Quote;
+use Magento\Framework\App\Request\Http as HttpRequest;
 
 /**
  * Order create model
@@ -264,6 +265,11 @@ class Create extends \Magento\Framework\DataObject implements \Magento\Checkout\
      */
     private $orderRepositoryInterface;
 
+    /**
+     * @var HttpRequest
+     */
+    private $request;
+
     /**
      * @param \Magento\Framework\ObjectManagerInterface $objectManager
      * @param \Magento\Framework\Event\ManagerInterface $eventManager
@@ -298,6 +304,7 @@ class Create extends \Magento\Framework\DataObject implements \Magento\Checkout\
      * @param StoreManagerInterface $storeManager
      * @param CustomAttributeListInterface|null $customAttributeList
      * @param OrderRepositoryInterface|null $orderRepositoryInterface
+     * @param HttpRequest|null $request
      * @SuppressWarnings(PHPMD.ExcessiveParameterList)
      */
     public function __construct(
@@ -333,7 +340,8 @@ public function __construct(
         ExtensibleDataObjectConverter $dataObjectConverter = null,
         StoreManagerInterface $storeManager = null,
         CustomAttributeListInterface $customAttributeList = null,
-        OrderRepositoryInterface $orderRepositoryInterface = null
+        OrderRepositoryInterface $orderRepositoryInterface = null,
+        HttpRequest $request = null
     ) {
         $this->_objectManager = $objectManager;
         $this->_eventManager = $eventManager;
@@ -372,6 +380,8 @@ public function __construct(
             ->get(CustomAttributeListInterface::class);
         $this->orderRepositoryInterface = $orderRepositoryInterface ?: ObjectManager::getInstance()
             ->get(OrderRepositoryInterface::class);
+        $this->request = $request ?: ObjectManager::getInstance()
+            ->get(HttpRequest::class);
     }
 
     /**
@@ -893,7 +903,7 @@ public function moveQuoteItem($item, $moveTo, $qty)
                         $cartItem->setPrice($item->getProduct()->getPrice());
                         $this->_needCollectCart = true;
                         $removeItem = true;
-                        $this->removeCartTransferredItems();
+                        $this->removeCartTransferredItemsAndUpdateQty($cartItem, $item->getId());
                     }
                     break;
                 case 'wishlist':
@@ -2274,16 +2284,31 @@ private function formattedOptions(\Magento\Catalog\Model\Product $product, $buyR
     }
 
     /**
-     * Remove cart from transferred items.
+     * Remove cart from transferred items and update the qty.
      *
+     * @param int|null|Item $cartItem
+     * @param int $itemId
      * @return void
      */
-    private function removeCartTransferredItems()
+    private function removeCartTransferredItemsAndUpdateQty(int|null|Item $cartItem, int $itemId)
     {
         $removeCartTransferredItems = $this->getSession()->getTransferredItems() ?? [];
         if (isset($removeCartTransferredItems['cart'])) {
-            unset($removeCartTransferredItems['cart']);
+            $removeTransferredItemKey = array_search($cartItem->getId(), $removeCartTransferredItems['cart']);
+            if ($removeCartTransferredItems['cart'][$removeTransferredItemKey]) {
+                $cartItem->clearMessage();
+                $cartItem->setHasError(false);
+                if (isset($this->request->get('item')[$itemId]['qty'])) {
+                    $qty = $this->request->get('item')[$itemId]['qty'];
+                }
+                $cartItem->setQty($qty);
+
+                if ($cartItem->getHasError()) {
+                    throw new LocalizedException(__($cartItem->getMessage()));
+                }
+                unset($removeCartTransferredItems['cart'][$removeTransferredItemKey]);
+            }
+            $this->getSession()->setTransferredItems($removeCartTransferredItems);
         }
-        $this->getSession()->setTransferredItems($removeCartTransferredItems);
     }
 }