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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bundle\FrameworkBundle\Routing;
use Symfony\Bundle\FrameworkBundle\Controller\ControllerNameParser;
use Symfony\Component\Config\Exception\LoaderLoadException;
use Symfony\Component\Config\Loader\DelegatingLoader as BaseDelegatingLoader;
use Symfony\Component\Config\Loader\LoaderResolverInterface;
/**
* DelegatingLoader delegates route loading to other loaders using a loader resolver.
*
* This implementation resolves the _controller attribute from the short notation
* to the fully-qualified form (from a:b:c to class::method).
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @final since Symfony 4.4
*/
class DelegatingLoader extends BaseDelegatingLoader
{
/**
* @deprecated since Symfony 4.4
*/
protected $parser;
private $loading = false;
private $defaultOptions;
/**
* @param LoaderResolverInterface $resolver
* @param array $defaultOptions
*/
public function __construct($resolver, $defaultOptions = [])
{
if ($resolver instanceof ControllerNameParser) {
@trigger_error(sprintf('Passing a "%s" instance as first argument to "%s()" is deprecated since Symfony 4.4, pass a "%s" instance instead.', ControllerNameParser::class, __METHOD__, LoaderResolverInterface::class), \E_USER_DEPRECATED);
$this->parser = $resolver;
$resolver = $defaultOptions;
$defaultOptions = 2 < \func_num_args() ? func_get_arg(2) : [];
} elseif (2 < \func_num_args() && func_get_arg(2) instanceof ControllerNameParser) {
$this->parser = func_get_arg(2);
}
$this->defaultOptions = $defaultOptions;
parent::__construct($resolver);
}
/**
* {@inheritdoc}
*/
public function load($resource, $type = null)
{
if ($this->loading) {
// This can happen if a fatal error occurs in parent::load().
// Here is the scenario:
// - while routes are being loaded by parent::load() below, a fatal error
// occurs (e.g. parse error in a controller while loading annotations);
// - PHP abruptly empties the stack trace, bypassing all catch/finally blocks;
// it then calls the registered shutdown functions;
// - the ErrorHandler catches the fatal error and re-injects it for rendering
// thanks to HttpKernel->terminateWithException() (that calls handleException());
// - at this stage, if we try to load the routes again, we must prevent
// the fatal error from occurring a second time,
// otherwise the PHP process would be killed immediately;
// - while rendering the exception page, the router can be required
// (by e.g. the web profiler that needs to generate an URL);
// - this handles the case and prevents the second fatal error
// by triggering an exception beforehand.
throw new LoaderLoadException($resource, null, 0, null, $type);
}
$this->loading = true;
try {
$collection = parent::load($resource, $type);
} finally {
$this->loading = false;
}
foreach ($collection->all() as $route) {
if ($this->defaultOptions) {
$route->setOptions($route->getOptions() + $this->defaultOptions);
}
if (!\is_string($controller = $route->getDefault('_controller'))) {
continue;
}
if (str_contains($controller, '::')) {
continue;
}
if ($this->parser && 2 === substr_count($controller, ':')) {
$deprecatedNotation = $controller;
try {
$controller = $this->parser->parse($controller, false);
@trigger_error(sprintf('Referencing controllers with %s is deprecated since Symfony 4.1, use "%s" instead.', $deprecatedNotation, $controller), \E_USER_DEPRECATED);
} catch (\InvalidArgumentException $e) {
// unable to optimize unknown notation
}
}
$route->setDefault('_controller', $controller);
}
return $collection;
}
}