OwnRouter.php

<?php


namespace App\Router;


use Symfony\Bundle\FrameworkBundle\Routing\Router;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface;
use Symfony\Component\Routing\Exception\InvalidParameterException;
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
use Symfony\Component\Routing\Exception\MissingMandatoryParametersException;
use Symfony\Component\Routing\Exception\NoConfigurationException;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\Exception\RouteNotFoundException;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Routing\Matcher\RequestMatcherInterface;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RouterInterface;
use Symfony\Contracts\Service\ServiceSubscriberInterface;


class OwnRouter implements WarmableInterface, ServiceSubscriberInterface, RouterInterface, RequestMatcherInterface
{
    /**
     * @var Router original
     */
    private $router;

    public function __construct(Router $router)
    {
        $this->router = $router;
    }

    public function getRouteCollection()
    {
        return $this->router->getRouteCollection();
    }

    public function warmUp(string $cacheDir)
    {
        return $this->router->warmUp($cacheDir);
    }

    public static function getSubscribedServices()
    {
        return [
            'routing.loader' => LoaderInterface::class,
        ];
    }

    public function setContext(RequestContext $context)
    {
        return $this->router->setContext($context);
    }

    public function getContext()
    {
        return $this->router->getContext();
    }

    public function matchRequest(Request $request)
    {
        return $this->router->matchRequest($request);
    }

    public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH)
    {
        // if it's not internal _profiler/_wdt routes
        // (best would be to have a allow list of routes to change)
        if(substr($name,0,1) !== '_'){
             // then add additional parameter
             $parameters['tenant'] = "5"; //you probably would like to take it from different service instead const ;)
        }
        
        return $this->router->generate($name, $parameters, $referenceType);
    }

    public function match(string $pathinfo)
    {
        return $this->router->match($pathinfo);
    }
}

services.yaml

services:
    ...
    App\Router\OwnRouter:
        decorates: router
        arguments: ['@.inner']

https://www.buymeacoffee.com/jzawadzki :D