Add custom DSN validation for Sparkpost region

Mailer/Factory/SparkpostTransportFactory.php

@@ -14,11 +14,13 @@
 use Symfony\Component\Mailer\Transport\Dsn;
 use Symfony\Component\Mailer\Transport\TransportInterface;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
 
 class SparkpostTransportFactory extends AbstractTransportFactory
 {
     public function __construct(
         private TransportCallback $transportCallback,
+        private TranslatorInterface $translator,
         EventDispatcherInterface $eventDispatcher,
         HttpClientInterface $client = null,
         LoggerInterface $logger = null
@@ -38,11 +40,15 @@ public function create(Dsn $dsn): TransportInterface
     {
         if (SparkpostTransport::MAUTIC_SPARKPOST_API_SCHEME === $dsn->getScheme()) {
             if (!$region = $dsn->getOption('region')) {
-                throw new InvalidArgumentException('Empty region');
+                throw new InvalidArgumentException(
+                    $this->translator->trans('mautic.sparkpost.plugin.region.empty', [], 'validators')
+                );
             }
 
             if (!array_key_exists($region, SparkpostTransport::SPARK_POST_HOSTS)) {
-                throw new InvalidArgumentException('Invalid region');
+                throw new InvalidArgumentException(
+                    $this->translator->trans('mautic.sparkpost.plugin.region.invalid', [], 'validators')
+                );
             }
 
             return new SparkpostTransport(

Tests/Functional/Mailer/Transport/SparkpostTransportTest.php

@@ -13,16 +13,20 @@
 use Symfony\Component\HttpClient\Response\MockResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
 
 class SparkpostTransportTest extends MauticMysqlTestCase
 {
+    private TranslatorInterface $translator;
+
     protected function setUp(): void
     {
         $this->configParams['mailer_dsn']            = 'mautic+sparkpost+api://:some_api@some_host:25?region=us';
         $this->configParams['messenger_dsn_email']   = 'sync://';
         $this->configParams['mailer_custom_headers'] = ['x-global-custom-header' => 'value123'];
         $this->configParams['mailer_from_email']     = '[email protected]';
         parent::setUp();
+        $this->translator = self::getContainer()->get('translator');
     }
 
     public function testEmailSendToContactSync(): void
@@ -114,4 +118,45 @@ private function createContact(string $email): Lead
 
         return $lead;
     }
+
+    /**
+     * @dataProvider dataInvalidDsn
+     *
+     * @param array<string, string> $data
+     */
+    public function testInvalidDsn(array $data, string $expectedMessage): void
+    {
+        // Request config edit page
+        $crawler = $this->client->request(Request::METHOD_GET, '/s/config/edit');
+        Assert::assertTrue($this->client->getResponse()->isOk());
+
+        // Set form data
+        $form = $crawler->selectButton('config[buttons][save]')->form();
+        $form->setValues($data + ['config[leadconfig][contact_columns]' => ['name', 'email', 'id']]);
+
+        // Check if there is the given validation error
+        $crawler = $this->client->submit($form);
+        Assert::assertTrue($this->client->getResponse()->isOk());
+        Assert::assertStringContainsString($this->translator->trans($expectedMessage, [], 'validators'), $crawler->text());
+    }
+
+    /**
+     * @return array<string, mixed[]>
+     */
+    public function dataInvalidDsn(): iterable
+    {
+        yield 'Empty region' => [
+            [
+                'config[emailconfig][mailer_dsn][options][list][0][value]' => '',
+            ],
+            'mautic.sparkpost.plugin.region.empty'
+        ];
+
+        yield 'Invalid region' => [
+            [
+                'config[emailconfig][mailer_dsn][options][list][0][value]' => 'invalid_region',
+            ],
+            'mautic.sparkpost.plugin.region.invalid'
+        ];
+    }
 }

Translations/en_US/validators.ini

@@ -0,0 +1,2 @@
+mautic.sparkpost.plugin.region.empty="Sparkpost region is empty. Add 'region' as a option."
+mautic.sparkpost.plugin.region.invalid="Sparkpost region is invalid. Add 'us' or 'eu' as a suitable region."