inanzzz | Servis parametrelerini twig extension içine enjekte etme

Istediğiniz her türlü servis parametresini veya herhangi bir değeri twig extensionuna enjekte edebilirsiniz. Aşağıdaki örnek herhangi bir anlam ifade etmeyebilir ama faydalı bilgi verir.

Parameters

# sport/app/config/parameters.yml
parameters:
    project_name: Sport

Encrypt Extension Class

# sport/src/Football/FrontendBundle/Twig/EncryptExtension.php
namespace Football\FrontendBundle\Twig;

use Twig_Extension;
use Twig_SimpleFilter;

class EncryptExtension extends Twig_Extension
{
    public function getName()
    {
        return 'encrypt_extension';
    }

    public function getFilters()
    {
        return array(
            new Twig_SimpleFilter(
                'encrypt',
                array($this, 'encryptFilter')
            )
        );
    }

    public function encryptFilter($value)
    {
        return sha1($value);
    }
}

Print Extension Class

# sport/src/Football/FrontendBundle/Twig/PrintExtension.php
namespace Football\FrontendBundle\Twig;

use Doctrine\ORM\EntityManager;
use Symfony\Component\Routing\RouterInterface;
use Twig_Extension;
use Twig_SimpleFilter;

class PrintExtension extends Twig_Extension
{
    private $entityManager;
    private $router;
    private $encryptExtension;
    private $projectName;
    private $randomValue;

    public function __construct(
        EntityManager $entityManager,
        RouterInterface $router,
        EncryptExtension $encryptExtension,
        $projectName,
        $randomValue
    ) {
        $this->entityManager = $entityManager;
        $this->router = $router;
        $this->encryptExtension = $encryptExtension;
        $this->projectName = $projectName;
        $this->randomValue = $randomValue;
    }

    public function getName()
    {
        return 'print_extension';
    }

    public function getFilters()
    {
        return array(
            new Twig_SimpleFilter(
                'print',
                array($this, 'printFilter')
            )
        );
    }

    public function printFilter($value)
    {
        return sprintf(
            'Doctrine EM class: %s # Home URL: %s # Plain value: %s # Encrypted value: %s # Project: %s # Random: %s',
            get_class($this->entityManager),
            $this->router->generate('football_frontend_homepage'),
            $value,
            $this->encryptExtension->encryptFilter($value),
            $this->projectName,
            $this->randomValue
        );
    }
}

Config

Service container'in tamamının @service_container classa enjekte edilmesi "kötü pratik" olarak kabul edilir, bu nedenle bu işlem tavsiye edilmez.

# sport/src/Football/FrontendBundle/Resources/config/services.yml
services:

    football_frontend.twig.extension.encrypt:
        class: Football\FrontendBundle\Twig\EncryptExtension
        public: false
        tags:
            - { name: twig.extension }

    football_frontend.twig.extension.print:
        class: Football\FrontendBundle\Twig\PrintExtension
        public: false
        arguments: [ @doctrine.orm.entity_manager, @router, @football_frontend.twig.extension.encrypt, %project_name%, 'London' ]
        tags:
            - { name: twig.extension }

Twig

Varsayalım ki name değişkeni "inanzzz" değerini tutacak şekilde, default controller içinde tanımlanmış olsun.

{{ name|print }}

Test

Eğer tarayıcınızdan http://sport.local/app_dev.php linkini açarsanız, aşağıdaki çıktıyı alırsınız.

Doctrine EM class: Doctrine\ORM\EntityManager # Home URL: /app_dev.php/ # Plain value: inanzzz # Encrypted value: bae9e624ee464e275fa804d047955bcc08caab5b # Project: Sport # Random: London