MC-17118: PayPal :: Payflow link support

Author: danielrenaud

app/code/Magento/PaypalGraphQl/Model/PayflowLinkAdditionalDataProvider.php

@@ -7,6 +7,8 @@
 
 namespace Magento\PaypalGraphQl\Model;
 
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\Url\Validator as UrlValidator;
 use Magento\Paypal\Model\Config;
 use Magento\QuoteGraphQl\Model\Cart\Payment\AdditionalDataProviderInterface;
 
@@ -15,14 +17,51 @@
  */
 class PayflowLinkAdditionalDataProvider implements AdditionalDataProviderInterface
 {
+    /**
+     * @var UrlValidator
+     */
+    private $urlValidator;
+
+    /**
+     * @param UrlValidator $urlValidator
+     */
+    public function __construct(UrlValidator $urlValidator)
+    {
+        $this->urlValidator = $urlValidator;
+    }
+
     /**
      * Returns additional data
      *
      * @param array $data
      * @return array
+     * @throws GraphQlInputException
      */
     public function getData(array $data): array
     {
-        return $data[Config::METHOD_PAYFLOWLINK] ?? [];
+        $additionalData = $data[Config::METHOD_PAYFLOWLINK] ?? [];
+        $this->validateUrls($additionalData);
+
+        return $additionalData;
+    }
+
+    /**
+     * Validate redirect urls
+     *
+     * @param array $data
+     * @throws GraphQlInputException
+     */
+    private function validateUrls(array $data): void
+    {
+        $urlKeys = ['cancel_url', 'return_url', 'error_url'];
+
+        foreach ($urlKeys as $urlKey) {
+            if (isset($data[$urlKey])) {
+                if (!$this->urlValidator->isValid($data[$urlKey])) {
+                    $errorMessage = $this->urlValidator->getMessages()['invalidUrl'] ?? "Invalid Url.";
+                    throw new GraphQlInputException(__($errorMessage));
+                }
+            }
+        }
     }
 }