MVC routing using Symfony routing

Question

Using symfony / routing, need to implement routing for the MVC application. Using the whole Symfony is prohibited, only the library. Controller class:

namespace App\Controllers;
use App\Core\Controller;
class IndexController extends Controller {

    public function IndexAction(){
        $this->View->render('index');
    }

}

view class:

namespace App\Core;

namespace App\Core;

class View{

    public function render($viewName) {
        $viewAry = explode('/', $viewName);
        $viewString = implode(DS, $viewAry);
        if(file_exists('View/site' . $viewString . '.php')) {
            require 'View/site' . $viewString . '.php';
        } else {
            die('The view \"' . $viewName . '\" does not exist.');
        }
    }
}

and Index.php itself from which it all starts:

use App\Controllers\IndexController;

use App\Core\Routing;
use Symfony\Component\Routing\Generator\UrlGenerator;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;

use App\Core\Application;
use Symfony\Component\Routing\Router;


require __DIR__ . '/vendor/autoload.php';

$collection = new RouteCollection();
$collection->add('index', new Route('/', array(
    '_controller' => [IndexController::class, 'IndexAction']
)));

return $collection;

As a result of a request to the application through the postman, I get nothing, what's the problem?

Answer 1

In your front controller you are just defining the routes, but not actually processing the request, matching it to a controller or invoking it.

There is a section on this topic in the manual, it uses more symfony components, but can be of help.

You'd have to determine the requested route directly from PATH_INFO instead of using the HttpFoundation component, and then try to match the request to a route.

Here is a very crude implementation:

$collection = new RouteCollection();
$collection->add('index', new Route('/', array(
    '_controller' => [IndexController::class, 'IndexAction']
)));

$matcher = new UrlMatcher($collection, new RequestContext());

// Matcher will throw an exception if no route found
$match = $matcher->match($_SERVER['PATH_INFO']);

// If the code reaches this point, a route was found, extract the corresponding controller
$controllerClass = $match['_controller'][0];
$controllerAction = $match['_controller'][1];

// Instance the controller
$controller = new $controllerClass();
// Execute it
call_user_func([$controller, $controllerAction]);