Symfony2的。 创建服务以设置Cookie和重定向

Question

我的下一个任务：禁止每1分钟创建更多新消息。 接下来是逻辑。 用户提交表单时，cookie的创建时间为60秒。 然后，当用户尝试再次提交时，我检查cookie是否存在。 如果为true-将用户重定向到主页。 如果为false-创建消息，则坚持到数据库，创建cookie。 因此，我在控制器中创建了下一个动作：

namespace Faster\Bundle\MessageBundle\Controller;

use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Cookie;
use Faster\Bundle\MessageBundle\Entity\Message;
use Faster\Bundle\MessageBundle\Form\MessageType;

class MessageController extends Controller
{
...
public function createAction(Request $request)
    {
        $message = new Message();
        $form = $this->createCreateForm($message);
        $form->handleRequest($request);
        if ($form->isValid()) {
            $valueOfCookiePerMinute = $request->cookies->get('perMinute');
            if ($valueOfCookieName) {

                return $this->redirect($this->generateUrl('message'));
            }
            else {
                $cookie = new Cookie('perMinute', 'CookieIsAlreadyExist', time() + 60);
                $response = new RedirectResponse($this->generateUrl('message'));
                $response->headers->setCookie($cookie);
                $em = $this->getDoctrine()->getManager();
                $em->persist($message);
                $em->flush();

                return $response;
            }
        }
...
}

但是我认为这是脂肪控制者。 我认为可以为这部分代码实现服务：

$valueOfCookiePerMinute = $request->cookies->get('perMinute');

if ($valueOfCookieName) {

                return $this->redirect($this->generateUrl('message'));
            }
            else {
                $cookie = new Cookie('perMinute', 'CookieIsAlreadyExist', time() + 60);
                $response = new RedirectResponse($this->generateUrl('message'));
                $response->headers->setCookie($cookie);
                $em = $this->getDoctrine()->getManager();
                $em->persist($message);
                $em->flush();

                return $response;
            }

但是对我来说，实施这种服务很困难。 我不知道该怎么做/请帮助我实现并理解它

Answer 1

没错，您的控制器应该是外观，因此在服务中设置此代码是个好主意。

首先，创建一个类：

// Messaging/MessageTimer.php

namespace Faster\Bundle\MessageBundle\Messaging;

use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Cookie;
use Symfony\Component\Routing\RouterInterface;
use Doctrine\Common\Persistence\ManagerRegistry;

class MessageTimer implements MessageTimerInterface
{
    /**
     * The database object manager.
     *
     * @var Doctrine\Common\Persistence\ObjectManager
     */
    private $objectManager;

    /**
     * The router.
     *
     * @var RouterInterface
     */
    private $router;

    /**
     * Constructor.
     *
     * @param ManagerRegistry $managerRegistry The manager registry.
     */
    public function __construct(
        ManagerRegistry $managerRegistry,
        RouterInterface $router
    )
    {
        $this->objectManager = $managerRegistry->getManager();
        $this->router = $router;
    }

    /**
     * {@inheritdoc}
     */
    public function processRequest(Request $request)
    {
        $valueOfCookiePerMinute = $request->cookies->get('perMinute');

        if ($valueOfCookieName) {
            return new RedirectResponse($this->router->generate('message'));
        } else {
            $cookie = new Cookie('perMinute', 'CookieIsAlreadyExist', time() + 60);
            $response = new RedirectResponse($this->router->generate('message'));
            $response->headers->setCookie($cookie);
            $this->objectManager->persist($message);
            $this->objectManager->flush();

            return $response;
        }
    }
}

如您所见，我们使用一个接口来使用低耦合（您将能够轻松替换此类和服务的实现）。 这对于充分利用依赖项注入至关重要！

// Messaging/MessageTimerInterface.php

namespace Faster\Bundle\MessageBundle\Messaging;

use Symfony\Component\HttpFoundation\Request;

interface MessageTimerInterface
{
    /**
     * Process a request.
     *
     * @param Request $request The request.
     */
    public function processRequest(Request $request);
}

然后，您必须在此类上声明服务：

# Resources/config/services.yml

parameters:
    your_own.message_timer.class: Faster\Bundle\MessageBundle\Messaging\MessageTimer

services:
    your_own.message_timer:
        class: %your_own.message_timer.class%
        arguments: [@doctrine, @router]

最后，您只需要在控制器中像这样使用它：

namespace Faster\Bundle\MessageBundle\Controller;

use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Cookie;
use Faster\Bundle\MessageBundle\Entity\Message;
use Faster\Bundle\MessageBundle\Form\MessageType;

class MessageController extends Controller
{
    // ...

    public function createAction(Request $request)
    {
        $message = new Message();
        $form = $this->createCreateForm($message);
        $form->handleRequest($request);
        if ($form->isValid()) {
            return $this->get('your_own.message_timer').processRequest($request);
        }

    // ...
}