Symfony Flex: Overriding Twig's routing path function - symfony

Question

In Symfony2 it was straightforward to override the RoutingExtension, that I could inject some extra parameters.
I'm using a dynamic domain to route to different parts of my application.
{subdomain}.domain.com
However, I don't want to have to specify subdomain every time I call path or url in twig.
I could create my own unique filter name, but I'd rather not.
Previously, we could put this in the services.yaml file and it would work.
services:
twig.extension.routing:
class: AppBundle\Twig\Extension\RoutingExtension
public: false
arguments:
- '#router'
- '#request_stack'
- '%domain%'
Symfony2 Twig overriding default path function
With Symfony Flex, all I get is Unable to register extension "App\TwigExtension\TwigRoutingExtension" as it is already registered.

Answer 1

This is how to override Twig's routing path/url functions in Symfony 5.x using AbstractExtension:
namespace App\Twig;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Twig\Extension\AbstractExtension;
use Twig\TwigFunction;
class MyRoutingExtension extends AbstractExtension
{
public function __construct(
private UrlGeneratorInterface $generator
){}
public function getFunctions(): array
{
return [
new TwigFunction('path', [$this, 'getPath']),
new TwigFunction('url', [$this, 'getUrl']),
];
}
public function getPath(string $name, array $parameters = [], bool $relative = false): string
{
return $this->generator->generate($name, $parameters, $relative ? UrlGeneratorInterface::RELATIVE_PATH : UrlGeneratorInterface::ABSOLUTE_PATH);
}
public function getUrl(string $name, array $parameters = [], bool $schemeRelative = false): string
{
return $this->generator->generate($name, $parameters, $schemeRelative ? UrlGeneratorInterface::NETWORK_PATH : UrlGeneratorInterface::ABSOLUTE_URL);
}
}

Answer 2

In SF4 it's even simpler:
first composer require symfony/twig-bundle twig/extensions
Normally autowiring is enable so you can simply do:
<?php
namespace App\Twig;
use Symfony\Bridge\Twig\Extension\RoutingExtension;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
class TestExtension extends RoutingExtension
{
public function __construct(UrlGeneratorInterface $generator)
{
parent::__construct($generator);
}
public function getPath($name, $parameters = array(), $relative = false)
{
return parent::getPath($name, $parameters, $relative);
}
}
If you want to setup a service forget about arguments definition it's boring :). Assuming your %domain% is available in your parameter do something like this:
<?php
namespace App\Twig;
use Symfony\Bridge\Twig\Extension\RoutingExtension;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Routing\RouterInterface;
class TestExtension extends RoutingExtension
{
/** #var RouterInterface $router */
protected $router;
/** #var RequestStack $stack */
protected $stack;
/** #var mixed $domain */
protected $domain;
/**
* TestExtension constructor.
*
* #param RouterInterface $router
* #param RequestStack $stack
* #param ParameterBagInterface $bag
*/
public function __construct(RouterInterface $router, RequestStack $stack, ParameterBagInterface $bag)
{
$this->router = $router;
$this->stack = $stack;
$this->domain = $bag->get('domain');
}
public function getPath($name, $parameters = array(), $relative = false)
{
return parent::getPath($name, $parameters, $relative);
}
}