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Drupal 8 - The Symfony and Drupal partnership Jakub Zalas DrupalCamp Yorkshire 31 May 2014

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@jakzal @jakub_zalas @SensioLabsUK £  

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Drupal in the eyes of a Symfony developer

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DRUPAL IS AWESOME NO, REALLY!

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Drupal community

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Drupal is a perfect tool for building websites

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BUT…

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IS IT PERFECT FOR EVERYONE?

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THE DRUPAL WAY PHP developer vs Drupal developer

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BARRIER TO ENTRY

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SO…

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FOCUS ON THE CORE OF YOUR BUSINESS AND LET OTHERS DO THE REST

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FOLLOW THE WIDELY ADOPTED INDUSTRY STANDARDS AND YOUR COMMUNITY WILL GROW

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Storm is coming in the Drupal world

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After every storm the sun will smile

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What is Symfony? First, Symfony2 is a reusable set of standalone, decoupled, and cohesive PHP components that solve common web development problems. http://fabien.potencier.org/article/49/what-is-symfony2

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Fixing PHP Debug HttpFoundation Yaml Tools Filesystem Finder Process Stopwatch Web Framework Foundation HttpKernel Routing Templating Data Helpers Config OptionsResolver PropertyAccess Serializer Patterns DependencyInjection   EventDispatcher   I18n Intl + Icu Locale Translation Crawlers BrowserKit CssSelector DomCrawler Framework+ ClassLoader Console ExpressionLanguage Form Security Validator

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What is Symfony? Then, based on these components, Symfony2 is also a full-stack web framework. http://fabien.potencier.org/article/49/what-is-symfony2

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Projects on packagist.org 4373 21% 1206 6% 14838 73% Depends on Symfony Depends on Zend Other December  2013  

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0 100 200 300 400 500 600 700 Bundles Other Symfony Component based projects December  2013  

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Symfony community

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GROWING BETTER DEVELOPERS

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3178 forks 1025 code contributors 739 doc contributors

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8421 stars

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HttpFoundation

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$_GET $_POST $_SERVER $_COOKIE $_FILES

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use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $request->query->...(); // $_GET $request->request->...(); // $_POST $request->cookies->...(); // $_COOKIE $request->files->...(); // $_FILES $request->server->...(); // $_SERVER $request->headers->...(); // $_SERVER $request->attributes->...(); // up to you :)

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$id = isset($_GET['id']) ? $_GET['id'] : -1; becomes $id = $request->query->get('id', -1);

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$request->query->get('name', 'default'); $request->query->set('name', 'default'); $request->query->has('name'); $request->query->all(); $request->query->keys(); $request->query->replace('name', 'other'); $request->query->remove('name'); $request->query->getAlpha('name'); $request->query->getAlnum('name'); $request->query->getInt('name'); $request->query->getDigits('name');

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function router(Request $request) { $path = $request->getPathInfo(); $id = preg_replace('/node/(\d+)', '$1', $path); $request->attributes->set('id', $id); $request->attributes->set( '_controller', 'myController' ); } function myController (Request $request) { $id = $request->attributes->get('id'); // do your stuff } router($request); $controller = $request->attributes->get('_controller'); $controller($request);

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$expiresAt = new \DateTime('+1hour'); $expiresAt->setTimezone( new \DateTimeZone('UTC') ); $expires = $expresAt->format('D, d M Y H:i:s'); $expires.= ' GMT'; header('X-Event: SymfonyCon'); header('Cache-Control: public'); header('Expires: '.$expires); echo 'Hello!';

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use Symfony\Component\HttpFoundation\Response; $response = new Response('Hello!', 200); $response->headers->set('X-Event', 'SymfonyCon'); $response->setPublic(); $response->setExpires(new \DateTime('+1hour')); $response->send();

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// Somewhere in a controller $id = $request->query->get('id'); $date = $this->getPageUpdatedAtById($id); $response = new Response(); $response->setPublic(); $response->setLastModified($date); if ($response->isNotModified($request)) { return $response; } // else do heavy processing to render the page

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HttpKernel

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namespace Symfony\Component\HttpKernel; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; interface HttpKernelInterface { const MASTER_REQUEST = 1; const SUB_REQUEST = 2; /** * @return Response */ public function handle( Request $request, $type = self::MASTER_REQUEST, $catch = true ); }

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Request Response /hello/drupalcamp

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use Symfony\Component\HttpKernel\HttpKernelInterface; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; class SimpleKernel implements HttpKernelInterface { public function handle(Request $request /*,...*/) { return new Response('Hello Leeds!'); } }

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use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $kernel = new SimpleKernel(); $response = $kernel->handle($request); $response->send();

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Request Response callable   callable   callable   callable   / /hello/{name} /contact /events Router /hello/drupalcamp

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Routing

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use Symfony\Component\Routing\RouteCollection; use Symfony\Component\Routing\Route; $routes = new RouteCollection(); $routes->add( 'hello', new Route( '/hello/{name}', ['controller' => 'HelloController'] ) );

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hello: path: '/hello/{name}' defaults: _controller: 'HelloController' requirements: name: 'a-zA-Z' methods: ['GET'] OR…

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use Symfony\Component\Routing\Matcher\UrlMatcher; use Symfony\Component\Routing\RequestContext; $context = new RequestContext( '/hello/Leeds', 'GET' ); $matcher = new UrlMatcher($routes, $context); $parameters = $matcher->match('/hello/Leeds'); var_dump($parameters); // [ // 'controller' => 'HelloController', // 'name' => 'Leeds', // '_route' => 'hello' // ]

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use Symfony\Component\HttpFoundation\Request; use Symfony\Component\Routing\Matcher\UrlMatcher; use Symfony\Component\Routing\RequestContext; $request = Request::createFromGlobals(); $context = new RequestContext(); $context->fromRequest($request); $matcher = new UrlMatcher($routes, $context);

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EventDispatcher

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Handle Request Execute  a   controller   Geoip  lookup   Mobile   redirect   Authen

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Request Response Router Controller Resolver Event Dispatcher GeoipListener SessionListener LocaleListener Firewall kernel.request TemplateListener ControllerListener ParamConverter Listener TemplateListener

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Request Response Router Controller Resolver Event Dispatcher GeoipListener SessionListener LocaleListener Firewall kernel.request TemplateListener ControllerListener ParamConverter Listener TemplateListener

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Subjects Listeners Event Dispatcher Mailer Listener Registration Dispatcher add listener registration.success notify registration.success call register

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Subjects Listeners Event Dispatcher Mailer Listener Registration Dispatcher add listener registration.success notify registration.success call SMS Listener add listener registration.success call register

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use Symfony\Component\EventDispatcher\EventDispatcherInterface; class Registration { private $dispatcher; public function __construct( EventDispatcherInterface $dispatcher ) { $this->dispatcher = $dispatcher; } // ... }

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use Symfony\Component\EventDispatcher\GenericEvent; class Registration { // ... public function register($user) { // register the user ... // dispatch an event if registration succeeded $this->dispatcher->dispatch( 'registration.success', new GenericEvent($user) ); } }

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class MailerListener { private $mailer; private $twig; public function __construct( Mailer $mailer, TwigEngine $twig ) { $this->mailer = $mailer; $this->twig = $twig; } // ... }

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use Symfony\Component\EventDispatcher\GenericEvent; class MailerListener { // ... public function sendMail(GenericEvent $event) { $user = $event->getSubject(); $message = $this->createMessage($user) $this->mailer->send($message); } private function createMessage($user) { return $this->twig->render(/* */); } }

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use Symfony\Component\EventDispatcher\EventDispatcher; $mailerListener = new MailerListener($mailer, $twig); $smsListener = new SmsListener($smsGateway); $dispatcher = new EventDispatcher(); $dispatcher->addListener( 'registration.success', array($mailerListener, 'sendMail') ); $dispatcher->addListener( 'registration.success', array($smsListener, 'sendSms') ); $registration = new Registration($dispatcher); $registration->register($user);

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Serializer

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namespace Symfony\Component\Serializer; interface SerializerInterface { /** * @return string */ public function serialize( $data, $format, array $context = [] ); /** * @return object */ public function deserialize( $data, $type, $format, array $context ); }

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class Person { private $age; private $name; public function getName() { return $this->name; } public function getAge() { return $this->age; } public function setName($name) { $this->name = $name; } public function setAge($age) { $this->age = $age; } }

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$person = new Person(); $person->setAge(18); $person->setName('Kuba');

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use Symfony\Component\Serializer\Serializer; use Symfony\Component\Serializer\Encoder\JsonEncoder; use Symfony\Component\Serializer\Normalizer \GetSetMethodNormalizer; $normalizers = [ new GetSetMethodNormalizer() ]; $encoders = [ new JsonEncoder(), new XmlEncoder() ]; $serializer = new Serializer($normalizers, $encoders); $serializer->serialize($person, 'json'); // {"name":"foo", "age": 18}

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Validator

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use Symfony\Component\Validator\Constraints\NotBlank; use Symfony\Component\Validator\Constraints\Email; class User { /** * @Email * @NotBlank */ public $email; }

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User: properties: name: - Email: ~ - NotBlank: ~ OR…

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use Symfony\Component\Validator\Validation; $validator = Validation::createValidatorBuilder() ->enableAnnotationMapping() ->getValidator(); $errors = $validator->validate(new User()); if (count($errors) > 0) { var_dump($errors); } Cau

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var_dump($errors); class Symfony\Component\Validator\ConstraintViolationList#18 (1) { private $violations => array(1) { [0] => class Symfony\Component\Validator\ConstraintViolation#31 (8) { private $message => string(31) "This value should not be blank." private $propertyPath => string(5) "email" private $invalidValue => NULL /* ... */ } } }

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Yaml

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parameters: username: kuba password: 123123 groups: [ 'admin', 'editor' ]

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use Symfony\Component\Yaml\Yaml; $data = Yaml::parse('config.yml'); var_dump($data); // [ // 'parameters' => [ // 'username' => 'kuba', // 'password' => '123123', // 'groups' => [ 'admin', 'editor' ] // ] // ]

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foo: &foo bar: ~ hello: drupal test: <<: *foo bar: true obj: !!php/object:O:8:"stdClass":1:{s:5:"title";s: 14:"Foo in the bar";}

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ClassLoader

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use Symfony\Component\ClassLoader\ClassLoader; $loader = new ClassLoader(); $loader->addPrefix('Acme\\', __DIR__.'/src'); $loader->register(); // Acme\Search\Query => src/Acme/Search/Query.php

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// Retrieve the Composer autoloader $loader = include __DIR__ . '/../vendor/autoload.php'; $loader->unregister(); // Wrap the Composer autoloader into cached autoloader require_once __DIR__.'/../vendor/.../ApcClassLoader.php'; $apcLoader = new ApcClassLoader('drupal.', $loader); $apcLoader->register();

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DependencyInjection

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class appDevDebugProjectContainer extends Container { protected function getSymfonyConApiService() { $this->services['drupal.api'] = $instance = new SymfonyConApi(); return $instance; } }

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Few ideas for the next steps

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{ "require": { "monolog/monolog": "1.2.*" } } https://getcomposer.org/

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    {% for user in users %}
  • {{ user.username | title }}
    • {% else %}
  • no user found
    • {% endfor %}
http://twig.sensiolabs.org/

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more ?

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{ "require": { "symfony/console": "~2.3" }, "autoload": { "psr-4": { "DrupalCamp\\": "core/lib/DrupalCamp" } } } composer.json

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curl -sS https://getcomposer.org/installer | php composer update symfony/console

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protected function configure() { $this->setName('drupal:add-article'); $this->setDescription('Adds an article to Drupal'); $this->setHelp('Very helpful and moderately long help message.'); $this->addArgument( 'title', InputArgument::REQUIRED, 'The title' ); }

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add(new \DrupalCamp\Command\AddArticleCommand()); $app->run();

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protected function execute( InputInterface $input, OutputInterface $output ) { $title = $input->getArgument('title'); $body = $this->getBody($title); $response = $this->post($body); $message = sprintf( '%d %s %s', $response->getStatusCode(), $response->getReasonPhrase(), $response->getHeader('Location') ); $output->writeln($message); }

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private function getBody($title) { return [ 'title' => [['value' => $title]], 'body' => [ [ 'format' => 'restricted_html', 'summary' => '', 'value' => '

hello there!

' ] ], '_links' => [ 'type' => [ 'href' => 'http://localhost:8000/rest/type/node/article' ] ] ]; }

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private function post($body) { $client = new Client(); $client->setDefaultOption( 'headers', [ 'Accept' => 'application/hal+json', 'Content-Type' => 'application/hal+json' ] ); return $client->post( 'http://localhost:8000/entity/node', ['body' => json_encode($body)] ); }

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Thank you http://bit.ly/sflive2014

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Credits •  https://www.flickr.com/photos/bfs_man/4939624151 •  https://www.flickr.com/photos/marine_corps/6771070707/in/photostream/ •  https://www.flickr.com/photos/katerha/5746905652/in/photostream/ •  https://www.flickr.com/photos/40855483@N00/13247934334 •  https://www.flickr.com/photos/eschipul/683341572 •  https://www.flickr.com/photos/harusday/2971387785 •  https://www.flickr.com/photos/kaptainkobold/3203311346 •  http://www.sxc.hu/photo/338038 •  http://www.sxc.hu/photo/1223174 •  http://www.freeimages.com/photo/308460 •  http://www.sxc.hu/photo/771223 •  https://www.flickr.com/photos/so_wrong_its_kelly/4380499403/in/ photolist-7F6cRM-9gU8zv-8QNo5g-6FA4u-TMjzu-4FxwKz-7jeqDa- HHoYw-5YAqDi-9m5quF-6AZ7DQ-4oqxmn-9TLn7Y-4ovcMN-4ouUou-9THiy2-4or7dt-4oqqje- 4oraCR-4ouCKo-4ovgv3-4oqYKp-4ouZa9-4ouJF1-4oquKK-4ouwgY-4ouFj5-4ouWB7-4ouQSQ- 4or3Nz-4ouMEd-8vcTct-7B9zWL-HSGyD-dxiE3c-2bfNXS-4jH2nf-7V8NfZ-ab7nsC-8ngLev- ab79CA-zwpJh-7V5twX-9TLm6G-9TLjZd-ebUsRF-9THuXc-9TLnKA-9GF6oi-ab4ogP