Added MakeSerializerEncoder command.

composer.json

@@ -17,7 +17,8 @@
         "symfony/dependency-injection": "^3.4|^4.0",
         "symfony/filesystem": "^3.4|^4.0",
         "symfony/framework-bundle": "^3.4|^4.0",
-        "symfony/http-kernel": "^3.4|^4.0"
+        "symfony/http-kernel": "^3.4|^4.0",
+        "symfony/serializer": "^3.4|^4.0"
     },
     "require-dev": {
         "symfony/phpunit-bridge": "^3.4|^4.0",

src/Command/MakeSerializerEncoderCommand.php

@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\MakerBundle\Command;
+
+use Symfony\Bundle\MakerBundle\ConsoleStyle;
+use Symfony\Bundle\MakerBundle\DependencyBuilder;
+use Symfony\Bundle\MakerBundle\Str;
+use Symfony\Bundle\MakerBundle\Validator;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Question\Question;
+use Symfony\Component\Serializer\Serializer;
+
+/**
+ * @author Piotr Grabski-Gradzinski <piotr.gradzinski@gmail.com>
+ */
+final class MakeSerializerEncoderCommand extends AbstractCommand
+{
+    protected static $defaultName = 'make:serializer:encoder';
+
+    protected function configure()
+    {
+        $this
+            ->setDescription('Creates a new custom encoder class')
+            ->addArgument('name', InputArgument::OPTIONAL, 'Choose a class name for your encoder (e.g. <fg=yellow>YamlEncoder</>).')
+            ->addArgument('format', InputArgument::OPTIONAL, 'Pick your format name (e.g. <fg=yellow>yaml</>)')
+            ->setHelp(file_get_contents(__DIR__.'/../Resources/help/MakeSerializerEncoder.txt'))
+        ;
+    }
+
+    protected function getParameters(): array
+    {
+        $encoderClassName = Str::asClassName($this->input->getArgument('name'), 'Encoder');
+        Validator::validateClassName($encoderClassName);
+        $format = $this->input->getArgument('format');
+
+        return [
+            'encoder_class_name' => $encoderClassName,
+            'format' => $format,
+        ];
+    }
+
+    protected function getFiles(array $params): array
+    {
+        return [
+            __DIR__.'/../Resources/skeleton/serializer/Encoder.php.txt' => 'src/Serializer/'.$params['encoder_class_name'].'.php'
+        ];
+    }
+
+    protected function writeNextStepsMessage(array $params, ConsoleStyle $io)
+    {
+        $io->text([
+            'Next: Open your new encoder class and start customizing it.',
+            'Find the documentation at <fg=yellow>http://symfony.com/doc/current/serializer/custom_encoders.html</>'
+        ]);
+    }
+
+    protected function configureDependencies(DependencyBuilder $dependencies)
+    {
+        $dependencies->addClassDependency(
+          Serializer::class,
+          'serializer'
+        );
+    }
+}

src/Resources/help/MakeSerializerEncoder.txt

@@ -0,0 +1,5 @@
+The <info>%command.name%</info> command generates a new encoder class.
+
+<info>php %command.full_name% YamlEncoder</info>
+
+If the argument is missing, the command will ask for the class name interactively.

src/Resources/skeleton/serializer/Encoder.php.txt

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Serializer;
+
+use Symfony\Component\Serializer\Encoder\DecoderInterface;
+use Symfony\Component\Serializer\Encoder\EncoderInterface;
+
+class {{ encoder_class_name }} implements EncoderInterface, DecoderInterface
+{
+    public function encode($data, $format, array $context = array())
+    {
+        // TODO: return your encoded data
+        return '';
+    }
+
+    public function supportsEncoding($format)
+    {
+        return '{{ format }}' === $format;
+    }
+
+    public function decode($data, $format, array $context = array())
+    {
+        // TODO: return your decoded data
+        return '';
+    }
+
+    public function supportsDecoding($format)
+    {
+        return '{{ format }}' === $format;
+    }
+}

tests/Command/FunctionalTest.php

@@ -9,6 +9,7 @@
 use Symfony\Bundle\MakerBundle\Command\MakeEntityCommand;
 use Symfony\Bundle\MakerBundle\Command\MakeFormCommand;
 use Symfony\Bundle\MakerBundle\Command\MakeFunctionalTestCommand;
+use Symfony\Bundle\MakerBundle\Command\MakeSerializerEncoderCommand;
 use Symfony\Bundle\MakerBundle\Command\MakeSubscriberCommand;
 use Symfony\Bundle\MakerBundle\Command\MakeTwigExtensionCommand;
 use Symfony\Bundle\MakerBundle\Command\MakeUnitTestCommand;
@@ -151,6 +152,16 @@ public function getCommandTests()
             ],
         ];
 
+        $commands['serializer_encoder'] = [
+            new MakeSerializerEncoderCommand($generator),
+            [
+                // encoder class name
+                'FooBarEncoder',
+                // encoder format
+                'foobar'
+            ]
+        ];
+
         $commands['twig_extension'] = [
             new MakeTwigExtensionCommand($generator),
             [