graphQl: added extension point for multishipping

Author: vitaliyboyko

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

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Model\Cart;
+
+use InvalidArgumentException;
+use Magento\Framework\GraphQl\Query\Resolver\ContextInterface;
+
+/**
+ * Set shipping addresses for shopping cart processors chain
+ */
+class SetShippingAddressesOnCart implements SetShippingAddressesOnCartInterface
+{
+    /**
+     * @var SetShippingAddressesOnCartInterface[]
+     */
+    private $shippingAddressProcessors;
+
+    /**
+     * @param array $shippingAddressProcessors
+     */
+    public function __construct(
+        array $shippingAddressProcessors
+    ) {
+        $this->shippingAddressProcessors = $shippingAddressProcessors;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function execute(ContextInterface $context, int $cartId, array $shippingAddresses): void
+    {
+        foreach ($this->shippingAddressProcessors as $shippingAddressProcessor) {
+            if (!$shippingAddressProcessor instanceof SetShippingAddressesOnCartInterface) {
+                throw new InvalidArgumentException(
+                    get_class($shippingAddressProcessor) .
+                    ' is not instance of \Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface.'
+                );
+            }
+
+            $shippingAddressProcessor->execute($context, $cartId, $shippingAddresses);
+        }
+    }
+}

app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressOnCart.php renamed to app/code/Magento/QuoteGraphQl/Model/Cart/SetShippingAddressesOnCart/SingleShippingAddressProcessor.php

@@ -5,7 +5,7 @@
  */
 declare(strict_types=1);
 
-namespace Magento\QuoteGraphQl\Model\Cart;
+namespace Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCart;
 
 use Magento\Authorization\Model\UserContextInterface;
 use Magento\Customer\Api\Data\AddressInterface;
@@ -15,13 +15,12 @@
 use Magento\Quote\Model\Quote\Address;
 use Magento\Quote\Model\ShippingAddressManagementInterface;
 use Magento\Customer\Api\AddressRepositoryInterface;
+use Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface;
 
 /**
- * Class SetShippingAddressOnCart
- *
- * Set shipping address for a specified shopping cart
+ * Set single shipping address for a specified shopping cart
  */
-class SetShippingAddressOnCart
+class SingleShippingAddressProcessor implements SetShippingAddressesOnCartInterface
 {
     /**
      * @var ShippingAddressManagementInterface
@@ -54,17 +53,12 @@ public function __construct(
     }
 
     /**
-     * @param ContextInterface $context
-     * @param int $cartId
-     * @param array $shippingAddresses
-     * @return void
+     * @inheritdoc
      */
-    public function setAddresses(ContextInterface $context, int $cartId, array $shippingAddresses): void
+    public function execute(ContextInterface $context, int $cartId, array $shippingAddresses): void
     {
         if (count($shippingAddresses) > 1) {
-            throw new GraphQlInputException(
-                __('Multiple address does not allowed here!')
-            );
+            return;
         }
         $shippingAddress = current($shippingAddresses);
         $customerAddressId = $shippingAddress['customer_address_id'] ?? null;

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

@@ -0,0 +1,31 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Model\Cart;
+
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\GraphQl\Query\Resolver\ContextInterface;
+
+/**
+ * Extension point for setting shipping addresses for a specified shopping cart
+ *
+ * All objects that are responsible for set shipping addresses on cart via GraphQl should implement this interface.
+ */
+interface SetShippingAddressesOnCartInterface
+{
+
+    /**
+     * Set shipping addresses for a specified shopping cart
+     *
+     * @param ContextInterface $context
+     * @param int $cartId
+     * @param array $shippingAddresses
+     * @return void
+     * @throws GraphQlInputException
+     */
+    public function execute(ContextInterface $context, int $cartId, array $shippingAddresses): void;
+}

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

@@ -15,7 +15,7 @@
 use Magento\Quote\Model\MaskedQuoteIdToQuoteIdInterface;
 use Magento\Quote\Model\ShippingAddressManagementInterface;
 use Magento\QuoteGraphQl\Model\Cart\GetCartForUser;
-use Magento\QuoteGraphQl\Model\Cart\SetShippingAddressOnCart;
+use Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface;
 
 /**
  * Class SetShippingAddressesOnCart
@@ -29,11 +29,6 @@ class SetShippingAddressesOnCart implements ResolverInterface
      */
     private $maskedQuoteIdToQuoteId;
 
-    /**
-     * @var SetShippingAddressOnCart
-     */
-    private $setShippingAddressOnCart;
-
     /**
      * @var ShippingAddressManagementInterface
      */
@@ -49,25 +44,30 @@ class SetShippingAddressesOnCart implements ResolverInterface
      */
     private $arrayManager;
 
+    /**
+     * @var SetShippingAddressesOnCartInterface
+     */
+    private $setShippingAddressesOnCart;
+
     /**
      * @param MaskedQuoteIdToQuoteIdInterface $maskedQuoteIdToQuoteId
-     * @param SetShippingAddressOnCart $setShippingAddressOnCart
      * @param ShippingAddressManagementInterface $shippingAddressManagement
      * @param GetCartForUser $getCartForUser
      * @param ArrayManager $arrayManager
+     * @param SetShippingAddressesOnCartInterface $setShippingAddressesOnCart
      */
     public function __construct(
         MaskedQuoteIdToQuoteIdInterface $maskedQuoteIdToQuoteId,
-        SetShippingAddressOnCart $setShippingAddressOnCart,
         ShippingAddressManagementInterface $shippingAddressManagement,
         GetCartForUser $getCartForUser,
-        ArrayManager $arrayManager
+        ArrayManager $arrayManager,
+        SetShippingAddressesOnCartInterface $setShippingAddressesOnCart
     ) {
         $this->maskedQuoteIdToQuoteId = $maskedQuoteIdToQuoteId;
-        $this->setShippingAddressOnCart = $setShippingAddressOnCart;
         $this->shippingAddressManagement = $shippingAddressManagement;
         $this->getCartForUser = $getCartForUser;
         $this->arrayManager = $arrayManager;
+        $this->setShippingAddressesOnCart = $setShippingAddressesOnCart;
     }
 
     /**
@@ -89,7 +89,7 @@ public function resolve(Field $field, $context, ResolveInfo $info, array $value
         $cart = $this->getCartForUser->execute($maskedCartId, $context->getUserId());
         $cartId = (int)$cart->getEntityId();
 
-        $this->setShippingAddressOnCart->setAddresses($context, $cartId, $shippingAddresses);
+        $this->setShippingAddressesOnCart->execute($context, $cartId, $shippingAddresses);
 
         return [
             'cart' => [

app/code/Magento/QuoteGraphQl/etc/graphql/di.xml

@@ -6,6 +6,15 @@
  */
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <preference for="Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface"
+                type="Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCart" />
+    <type name="Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCartInterface">
+        <arguments>
+            <argument name="shippingAddressProcessors" xsi:type="array">
+                <item name="singleShippingAddress" xsi:type="object">Magento\QuoteGraphQl\Model\Cart\SetShippingAddressesOnCart\SingleShippingAddressProcessor</item>
+            </argument>
+        </arguments>
+    </type>
     <virtualType name="multishippingPaymentSpecification" type="Magento\Payment\Model\Method\Specification\Composite">
         <arguments>
             <argument name="specifications" xsi:type="array">