todo_api/src/Tqdev/PhpCrudApi/Controller/OpenApiController.php

<?php

namespace Tqdev\PhpCrudApi\Controller;

use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Tqdev\PhpCrudApi\Middleware\Router\Router;
use Tqdev\PhpCrudApi\OpenApi\OpenApiService;

class OpenApiController
{
    private $openApi;
    private $responder;

    public function __construct(Router $router, Responder $responder, OpenApiService $openApi)
    {
        $router->register('GET', '/openapi', array($this, 'openapi'));
        $this->openApi = $openApi;
        $this->responder = $responder;
    }

    public function openapi(ServerRequestInterface $request): ResponseInterface
    {
        return $this->responder->success($this->openApi->get());
    }
}