Add extension point for Quote Address.

Move logic related to Shipping Address to the GetShippingAddress service.

Author: swnsma

app/code/Magento/QuoteGraphQl/Model/Cart/GetShippingAddress.php

@@ -32,22 +32,36 @@ public function __construct(QuoteAddressFactory $quoteAddressFactory)
     }
 
     /**
+     * Get Shipping Address based on the input.
+     *
      * @param ContextInterface $context
      * @param array $shippingAddressInput
      * @return Address
      * @throws GraphQlAuthorizationException
      * @throws GraphQlInputException
      * @throws GraphQlNoSuchEntityException
      */
-    public function execute(ContextInterface $context, array $shippingAddressInput)
+    public function execute(ContextInterface $context, array $shippingAddressInput): Address
     {
         $customerAddressId = $shippingAddressInput['customer_address_id'] ?? null;
+        $addressInput = $shippingAddressInput['address'] ?? null;
 
-        $addressInput = $shippingAddressInput['address'];
         if ($addressInput) {
             $addressInput['customer_notes'] = $shippingAddressInput['customer_notes'] ?? '';
         }
 
+        if (null === $customerAddressId && null === $addressInput) {
+            throw new GraphQlInputException(
+                __('The shipping address must contain either "customer_address_id" or "address".')
+            );
+        }
+
+        if ($customerAddressId && $addressInput) {
+            throw new GraphQlInputException(
+                __('The shipping address cannot contain "customer_address_id" and "address" at the same time.')
+            );
+        }
+
         if (null === $customerAddressId) {
             $shippingAddress = $this->quoteAddressFactory->createBasedOnInputData($addressInput);
         } else {

app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressesOnCart.php

@@ -49,20 +49,6 @@ public function execute(ContextInterface $context, CartInterface $cart, array $s
             );
         }
         $shippingAddressInput = current($shippingAddressesInput);
-        $customerAddressId = $shippingAddressInput['customer_address_id'] ?? null;
-        $addressInput = $shippingAddressInput['address'] ?? null;
-
-        if (null === $customerAddressId && null === $addressInput) {
-            throw new GraphQlInputException(
-                __('The shipping address must contain either "customer_address_id" or "address".')
-            );
-        }
-
-        if ($customerAddressId && $addressInput) {
-            throw new GraphQlInputException(
-                __('The shipping address cannot contain "customer_address_id" and "address" at the same time.')
-            );
-        }
 
         $shippingAddress = $this->getShippingAddress->execute($context, $shippingAddressInput);