Symfony 4, How to implement a general controller as a service?

Question

I have this controller

Controller1.php

Answer 1

Okay. Back to the basics. Start by getting yourself an IDE such a PHPStorm. It will highlight various syntax errors and what not. In particular, the IDE will help with the service namespace issue as well as assorted other problems.

The fundamental concept behind dependency injection is that dependencies needed by a given class should be, well, injected. Your GeneralService class needs the entity manager. In your previous identical question you had GeneralService extending AbstractController because AbstractController has a getDoctrine method. It still would not have have worked because getDoctrine in turn needs the service container. And of course in your current code, GeneralService has no getDoctrine method at all.

In any event, since GeneralService needs the entity manager then inject it:

# src/Service/GeneralService.php
namespace App\Service; # NOTE App\Service not just Service

use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;

class GeneralService
{
    private $entityManager;

    // Let Symfony inject whatever dependencies are needed
    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
    }
    public function list(Request $request, String $entityClass) : JsonResponse
    {
        if (!$request->headers->has('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($this->entityManager->getRepository($entityClass)->findAll());
    }
}

And do not exclude the GeneralService anymore.

Your controller class is pretty much okay once you use an IDE to get rid of all the little syntax errors:

namespace App\Controller;

use App\Service\GeneralService;
use App\Entity\SomeEntity;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;

class SubscriptionClass extends AbstractController
{
    public function AuthenticateAPI(Request $request, GeneralService $generalService)
    {
        $AuthenticatorObject = $generalService->list($request,SomeEntity::class);
        return $AuthenticatorObject;
    }

}

I did not actually test the above code though it should get you at least one step further.

One final note: Don't access any of the super globals directly i.e. $_ENV['API_KEY'] is a no no. The api_key should be injected along with the entity manager. I'll leave the exact details as an exercise for the student since injecting strings is a little bit different from injecting objects.