Mutation for creating braintree client token

This token is required by the sdk when creating nonces client-side

Author: pmclain

app/code/Magento/BraintreeGraphQl/Model/Resolver/CreateBraintreeClientToken.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\BraintreeGraphQl\Model\Resolver;
+
+use Magento\Braintree\Gateway\Config\Config;
+use Magento\Braintree\Gateway\Request\PaymentDataBuilder;
+use Magento\Braintree\Model\Adapter\BraintreeAdapterFactory;
+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\Store\Model\StoreManagerInterface;
+
+/**
+ * Resolver for generating Braintree client token
+ */
+class CreateBraintreeClientToken implements ResolverInterface
+{
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
+
+    /**
+     * @var Config
+     */
+    private $config;
+
+    /**
+     * @var BraintreeAdapterFactory
+     */
+    private $adapterFactory;
+
+    /**
+     * @param StoreManagerInterface $storeManager
+     * @param Config $config
+     * @param BraintreeAdapterFactory $adapterFactory
+     */
+    public function __construct(
+        StoreManagerInterface $storeManager,
+        Config $config,
+        BraintreeAdapterFactory $adapterFactory
+    ) {
+        $this->storeManager = $storeManager;
+        $this->config = $config;
+        $this->adapterFactory = $adapterFactory;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function resolve(
+        Field $field,
+        $context,
+        ResolveInfo $info,
+        array $value = null,
+        array $args = null
+    ) {
+        $storeId = $this->storeManager->getStore()->getId();
+
+        if (!$this->config->isActive($storeId)) {
+            throw new GraphQlInputException(__('The Braintree payment method is not active.'));
+        }
+
+        $params = [];
+        $merchantAccountId = $this->config->getMerchantAccountId($storeId);
+        if (!empty($merchantAccountId)) {
+            $params[PaymentDataBuilder::MERCHANT_ACCOUNT_ID] = $merchantAccountId;
+        }
+
+        return $this->adapterFactory->create($storeId)->generate($params);
+    }
+}

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

@@ -1,6 +1,10 @@
 # Copyright © Magento, Inc. All rights reserved.
 # See COPYING.txt for license details.
 
+type Mutation {
+    createBraintreeClientToken: String! @resolver(class: "\\Magento\\BraintreeGraphQl\\Model\\Resolver\\CreateBraintreeClientToken") @doc(description:"Creates Braintree Client Token for creating client-side nonce.")
+}
+
 input PaymentMethodInput {
     braintree: BraintreeInput
     braintree_cc_vault: BraintreeCcVaultInput

dev/tests/api-functional/_files/Magento/TestModuleBraintree/Model/Adapter/BraintreeAdapter.php

@@ -62,4 +62,13 @@ public function sale(array $attributes)
     {
         return $this->mockResponseDataProvider->generateMockSaleResponse($attributes);
     }
+
+    /**
+     * @param array $params
+     * @return string|\Braintree\Result\Error
+     */
+    public function generate(array $params = [])
+    {
+        return $this->mockResponseDataProvider->generateMockClientToken();
+    }
 }

dev/tests/api-functional/_files/Magento/TestModuleBraintree/Model/MockResponseDataProvider.php

@@ -54,6 +54,16 @@ public function generateMockNonceResponse(string $token): \Braintree\Instance
         return new \Braintree\Result\Successful($nonce, 'paymentMethodNonce');
     }
 
+    /**
+     * Create mock client token
+     *
+     * @return string
+     */
+    public function generateMockClientToken(): string
+    {
+        return $this->random->getRandomString(32);
+    }
+
     /**
      * Create Braintree transaction from provided request attributes
      *

dev/tests/api-functional/testsuite/Magento/GraphQl/Braintree/CreateBraintreeClientTokenTest.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Braintree;
+
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+/**
+ * Test creating Braintree client token mutation
+ */
+class CreateBraintreeClientTokenTest extends GraphQlAbstract
+{
+    /**
+     * Test creating Braintree client token
+     *
+     * @magentoApiDataFixture Magento/GraphQl/Braintree/_files/enable_braintree_payment.php
+     */
+    public function testCreateBraintreeClientToken()
+    {
+        $response = $this->graphQlMutation($this->getMutation());
+
+        self::assertArrayHasKey('createBraintreeClientToken', $response);
+        self::assertNotEmpty($response['createBraintreeClientToken']);
+    }
+
+    /**
+     * Test creating Braintree client token when method is disabled
+     *
+     * @expectedException \Exception
+     * @expectedExceptionMessage payment method is not active
+     */
+    public function testCreateBraintreeClientTokenNotActive()
+    {
+        $this->graphQlMutation($this->getMutation());
+    }
+
+    private function getMutation(): string
+    {
+        return <<<QUERY
+mutation {
+  createBraintreeClientToken
+}
+QUERY;
+    }
+}