gnu-social/src/Core/Controller.php

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<?php
// {{{ License
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
// }}}
/**
* Base class for controllers
*
* @package GNUsocial
* @category Controller
*
* @author Hugo Sales <hugo@hsal.es>
* @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
namespace App\Core;
use function App\Core\I18n\_m;
use App\Util\Common;
use App\Util\Exception\ClientException;
use App\Util\Exception\RedirectException;
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use Exception;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Event\ControllerEvent;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\Event\ViewEvent;
use Symfony\Component\HttpKernel\KernelEvents;
class Controller extends AbstractController implements EventSubscriberInterface
{
private array $vars = [];
private ?Request $request = null;
public function __construct(RequestStack $requestStack)
{
$this->request = $requestStack->getCurrentRequest();
}
/**
* TODO: Not currently used, so not tested, but should be
*
* @codeCoverageIgnore
*/
public function __invoke(Request $request)
{
$this->request = $request;
$class = get_called_class();
$method = 'on' . ucfirst(strtolower($request->getMethod()));
if (method_exists($class, $method)) {
return $class::$method($request, $this->vars);
} else {
return $class::handle($request, $this->vars);
}
}
/**
* Symfony event when it's searching for which controller to use
*/
public function onKernelController(ControllerEvent $event)
{
$controller = $event->getController();
$request = $event->getRequest();
$this->request = $request;
$this->vars = ['controler' => $controller, 'request' => $request, 'have_user' => Common::user() !== null];
Event::handle('StartTwigPopulateVars', [&$this->vars]);
$event->stopPropagation();
return $event;
}
/**
* Symfony event when the controller result is not a Response object
*/
public function onKernelView(ViewEvent $event)
{
$request = $event->getRequest();
$response = $event->getControllerResult();
if (!is_array($response)) {
// This means it's not one of our custom format responses, nothing to do
// @codeCoverageIgnoreStart
return $event;
// @codeCoverageIgnoreEnd
}
$this->vars = array_merge_recursive($this->vars, $response);
Event::handle('EndTwigPopulateVars', [&$this->vars]);
$template = $this->vars['_template'];
unset($this->vars['_template'], $this->vars['request'], $response['_template']);
// Respond in the the most preffered acceptable content type
$accept = $request->getAcceptableContentTypes() ?: ['text/html'];
$format = $request->getFormat($accept[0]);
switch ($format) {
case 'html':
$event->setResponse($this->render($template, $this->vars));
break;
case 'json':
$event->setResponse(new JsonResponse($response));
break;
default:
throw new ClientException(_m('Unsupported format'), 406); // 406 Not Acceptable
}
return $event;
}
/**
* Symfony event when the controller throws an exception
*
* @codeCoverageIgnore
*/
public function onKernelException(ExceptionEvent $event)
{
$except = $event->getThrowable();
if ($_ENV['APP_ENV'] !== 'dev') {
// TODO: This is where our custom exception pages could go
// $event->setResponse((new Response())->setStatusCode(455));
}
do {
if ($except instanceof RedirectException) {
if (($redir = $except->redirect_response) != null) {
$event->setResponse($redir);
} else {
$event->setResponse(new RedirectResponse($event->getRequest()->getPathInfo()));
}
}
} while ($except != null && ($except = $except->getPrevious()) != null);
return $event;
}
/**
* @codeCoverageIgnore
*/
public static function getSubscribedEvents()
{
return [
KernelEvents::CONTROLLER => 'onKernelController',
KernelEvents::EXCEPTION => 'onKernelException',
KernelEvents::VIEW => 'onKernelView',
];
}
/**
* Get and convert GET parameters. Can be called with `int`, `bool`, etc
*
* @param string $name
*
* @throws ValidatorException
*/
public function __call(string $method, array $args)
{
$name = $args[0];
$value = $this->request->query->get($name);
switch ($method) {
case 'int':
return (int) $value;
case 'bool':
return (bool) $value;
default:
// @codeCoverageIgnoreStart
Log::critical($m = "Method '{$method}' on class App\\Core\\Controller not found (__call)");
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throw new Exception($m);
// @codeCoverageIgnoreEnd
}
}
}