Symfony 4 How to autowire strings when making a general class? - symfony

Question

I would first like to say that I saw the other questions on here relating to this error I'm having and none solved my problems.
I have the following code for a controller to check an APIkey before sending data from the backend to the frontend.
file1Controller.php
<?php
namespace App\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;
class file1Controller extends AbstractController
{
/**
* #Route("/Some/URI", methods={"GET"}) // "/Some/URI" here
* #param Request $request
* #return JsonResponse
*/
public function list(Request $request)
{
if (empty($request->headers->get('api-key'))) {
return new JsonResponse(['error' => 'Please provide an API_key'], 401);
}
if ($request->headers->get('api-key') !== $_ENV['API_KEY']) {
return new JsonResponse(['error' => 'Invalid API key'], 401);
}
return new JsonResponse($this->getDoctrine()->getRepository('App:Something')->findAll()); //Something here
}
}
Which works exactly as intended (tested it with Postman and with my browser) for my simple learning example. I would like to generalize it so that I can use it in other places. Almost everything should stay the same except the parts where there are comments. This is what it becomes when making it general:
General.php
<?php
namespace App;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;
class General extends AbstractController
{
private $route;
private $entity;
/**
* General constructor.
* #param String $route
* #param String $entity
*/
function __construct(String $route, String $entity)
{
$this->route = $route;
$this->entity = $entity;
}
/**
* #Route({$this->route}, methods={"GET"})
* #param Request $request
* #return JsonResponse
*/
public function list(Request $request)
{
if (empty($request->headers->get('api-key'))) {
return new JsonResponse(['error' => 'Please provide an API_key'], 401);
}
if ($request->headers->get('api-key') !== $_ENV['API_KEY']) {
return new JsonResponse(['error' => 'Invalid API key'], 401);
}
return new JsonResponse($this->getDoctrine()->getRepository('App:{$this->entity}')->findAll());
}
}
And the file file1Controller.php changes to:
<?php
namespace App\Controller;
use App\General;
use Symfony\Component\HttpFoundation\Request;
class SubscriptionController
{
/**
* #return General
*/
public function AuthenticateAPI()
{
$generalObject = new General("/Some/URI", 'Something');
return $generalObject;
}
}
This new setup gives no compiler errors but of course, do give the following error (when testing it):
Cannot autowire service "App\General": argument "$route" of method "__construct()" is type-hinted "string", you should configure its value explicitly.
I understand that this error occurs because Symfony doesn't know which String to inject. But there must be a way to get around this? Because I can't specify the value explicitly in my case because I'll be making another file file2Controller.php which will be the exact same but with different $route and $entity.