Deprecate the TwigSwiftMailer implementation

Changelog.md

@@ -1,6 +1,10 @@
 Changelog
 =========
 
+### 3.4.0 (2024-06-25)
+
+* Deprecated the TwigSwiftMailer implementation
+
 ### 3.3.0 (2024-06-24)
 
 * Added a mailer implementation based on symfony/mailer and Twig

docs/emails.rst

@@ -42,7 +42,7 @@ The bundle comes with 3 mailer implementations. They are listed below
 by service id:
 
 - ``fos_user.mailer.twig_symfony`` uses symfony/mailer to send emails and Twig blocks to render the message.
-- ``fos_user.mailer.twig_swift`` uses Swiftmailer to send emails and Twig blocks to render the message.
+- ``fos_user.mailer.twig_swift`` (deprecated) uses Swiftmailer to send emails and Twig blocks to render the message.
 - ``fos_user.mailer.noop`` is a mailer implementation which performs no operation, so no emails are sent.
 
 .. note::

src/DependencyInjection/Configuration.php

@@ -223,7 +223,17 @@ private function addServiceSection(ArrayNodeDefinition $node): void
                 ->arrayNode('service')
                     ->addDefaultsIfNotSet()
                         ->children()
-                            ->scalarNode('mailer')->defaultNull()->end()
+                            ->scalarNode('mailer')
+                                ->defaultNull()
+                                ->validate()
+                                    ->ifInArray(['fos_user.mailer.twig_swift'])
+                                    ->then(function ($v) {
+                                        trigger_deprecation('friendsofsymfony/user-bundle', '3.4.0', 'The twig_swift mailer is deprecated because Swiftmailer itself is unmaintained.');
+
+                                        return $v;
+                                    })
+                                ->end()
+                            ->end()
                             ->scalarNode('email_canonicalizer')->defaultValue('fos_user.util.canonicalizer.default')->end()
                             ->scalarNode('token_generator')->defaultValue('fos_user.util.token_generator.default')->end()
                             ->scalarNode('username_canonicalizer')->defaultValue('fos_user.util.canonicalizer.default')->end()

src/DependencyInjection/FOSUserExtension.php

@@ -16,6 +16,7 @@
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\Alias;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\HttpKernel\DependencyInjection\Extension;
@@ -77,6 +78,14 @@ public function load(array $configs, ContainerBuilder $container): void
             $loader->load(sprintf('%s.xml', $basename));
         }
 
+        $twigSwiftMailerDefinition = $container->getDefinition('fos_user.mailer.twig_swift');
+        if (method_exists(Definition::class, 'getDeprecation')) {
+            $twigSwiftMailerDefinition->setDeprecated('friendsofsymfony/user-bundle', '3.4.0', 'The "%service_id%" service is deprecated. Use a different mailer implementation instead.');
+        } else {
+            // BC for Symfony <5.1
+            $twigSwiftMailerDefinition->setDeprecated('The "fos_user.mailer.twig_swift" service is deprecated. Use a different mailer implementation instead.');
+        }
+
         if (!$config['use_authentication_listener']) {
             $container->removeDefinition('fos_user.listener.authentication');
         }

src/Mailer/TwigSwiftMailer.php

@@ -17,6 +17,8 @@
 
 /**
  * @author Christophe Coevoet <[email protected]>
+ *
+ * @deprecated
  */
 class TwigSwiftMailer implements MailerInterface
 {