Add configurable product to Cart

app/code/Magento/ConfigurableProductGraphQl/Model/Resolver/AddConfigurableProductsToCart.php

@@ -0,0 +1,89 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\ConfigurableProductGraphQl\Model\Resolver;
+
+use Magento\Framework\GraphQl\Config\Element\Field;
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\GraphQl\Query\ResolverInterface;
+use Magento\Framework\GraphQl\Schema\Type\ResolveInfo;
+use Magento\Framework\Stdlib\ArrayManager;
+use Magento\QuoteGraphQl\Model\Cart\AddProductsToCart;
+use Magento\QuoteGraphQl\Model\Cart\ExtractDataFromCart;
+use Magento\QuoteGraphQl\Model\Cart\GetCartForUser;
+
+/**
+ * Add configurable products to cart GraphQl resolver
+ * {@inheritdoc}
+ */
+class AddConfigurableProductsToCart implements ResolverInterface
+{
+    /**
+     * @var ArrayManager
+     */
+    private $arrayManager;
+
+    /**
+     * @var GetCartForUser
+     */
+    private $getCartForUser;
+
+    /**
+     * @var AddProductsToCart
+     */
+    private $addProductsToCart;
+
+    /**
+     * @var ExtractDataFromCart
+     */
+    private $extractDataFromCart;
+
+    /**
+     * @param ArrayManager $arrayManager
+     * @param GetCartForUser $getCartForUser
+     * @param AddProductsToCart $addProductsToCart
+     * @param ExtractDataFromCart $extractDataFromCart
+     */
+    public function __construct(
+        ArrayManager $arrayManager,
+        GetCartForUser $getCartForUser,
+        AddProductsToCart $addProductsToCart,
+        ExtractDataFromCart $extractDataFromCart
+    ) {
+        $this->arrayManager = $arrayManager;
+        $this->getCartForUser = $getCartForUser;
+        $this->addProductsToCart = $addProductsToCart;
+        $this->extractDataFromCart = $extractDataFromCart;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function resolve(Field $field, $context, ResolveInfo $info, array $value = null, array $args = null)
+    {
+        $cartHash = $this->arrayManager->get('input/cart_id', $args);
+        $cartItems = $this->arrayManager->get('input/cartItems', $args);
+
+        if (!isset($cartHash)) {
+            throw new GraphQlInputException(__('Missing key "cart_id" in cart data'));
+        }
+
+        if (!isset($cartItems) || !is_array($cartItems) || empty($cartItems)) {
+            throw new GraphQlInputException(__('Missing key "cartItems" in cart data'));
+        }
+
+        $currentUserId = $context->getUserId();
+        $cart = $this->getCartForUser->execute((string)$cartHash, $currentUserId);
+
+        $this->addProductsToCart->execute($cart, $cartItems);
+        $cartData = $this->extractDataFromCart->execute($cart);
+
+        return [
+            'cart' => $cartData,
+        ];
+    }
+}

app/code/Magento/ConfigurableProductGraphQl/composer.json

@@ -7,6 +7,7 @@
         "magento/module-catalog": "*",
         "magento/module-configurable-product": "*",
         "magento/module-catalog-graph-ql": "*",
+        "magento/module-quote-graph-ql": "*",
         "magento/framework": "*"
     },
     "license": [

app/code/Magento/ConfigurableProductGraphQl/etc/schema.graphqls

@@ -1,5 +1,8 @@
 # Copyright © Magento, Inc. All rights reserved.
 # See COPYING.txt for license details.
+type Mutation {
+    addConfigurableProductsToCart(input: AddConfigurableProductsToCartInput): AddConfigurableProductsToCartOutput @resolver(class: "Magento\\ConfigurableProductGraphQl\\Model\\Resolver\\AddConfigurableProductsToCart")
+}
 
 type ConfigurableProduct implements ProductInterface, PhysicalProductInterface, CustomizableProductInterface @doc(description: "ConfigurableProduct defines basic features of a configurable product and its simple product variants") {
     variants: [ConfigurableVariant] @doc(description: "An array of variants of products") @resolver(class: "Magento\\ConfigurableProductGraphQl\\Model\\Resolver\\ConfigurableVariant")
@@ -35,3 +38,30 @@ type ConfigurableProductOptionsValues @doc(description: "ConfigurableProductOpti
     store_label: String @doc(description: "The label of the product on the current store")
     use_default_value: Boolean @doc(description: "Indicates whether to use the default_label")
 }
+
+input AddConfigurableProductsToCartInput {
+    cart_id: String!
+    cartItems: [ConfigurableProductCartItemInput!]!
+}
+
+type AddConfigurableProductsToCartOutput {
+    cart: Cart!
+}
+
+input ConfigurableProductCartItemInput {
+    data: CartItemDetailsInput!
+    variant_sku: String!
+    customizable_options:[CustomizableOptionInput!]
+}
+
+type ConfigurableCartItem implements CartItemInterface {
+    customizable_options: [SelectedCustomizableOption]!
+    configurable_options: [SelectedConfigurableOption!]!
+}
+
+type SelectedConfigurableOption {
+    id: Int!
+    option_label: String!
+    value_id: Int!
+    value_label: String!
+}

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

@@ -45,6 +45,8 @@ public function __construct(
      * @param Quote $cart
      * @param array $cartItems
      * @throws GraphQlInputException
+     * @throws \Magento\Framework\Exception\LocalizedException
+     * @throws \Magento\Framework\GraphQl\Exception\GraphQlNoSuchEntityException
      */
     public function execute(Quote $cart, array $cartItems): void
     {

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

@@ -61,6 +61,7 @@ public function __construct(
      * @return void
      * @throws GraphQlNoSuchEntityException
      * @throws GraphQlInputException
+     * @throws \Magento\Framework\Exception\LocalizedException
      */
     public function execute(Quote $cart, array $cartItemData): void
     {

app/code/Magento/QuoteGraphQl/etc/schema.graphqls

@@ -218,3 +218,8 @@ type CartItemSelectedOptionValuePrice {
     units: String!
     type: PriceTypeEnum!
 }
+
+input CartItemDetailsInput {
+    sku: String!
+    qty: Float!
+}