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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\Component\DependencyInjection\Compiler;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
use Symfony\Component\DependencyInjection\Reference;
/**
* Replaces all references to aliases with references to the actual service.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ResolveReferencesToAliasesPass extends AbstractRecursivePass
{
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container)
{
parent::process($container);
foreach ($container->getAliases() as $id => $alias) {
$aliasId = (string) $alias;
$this->currentId = $id;
if ($aliasId !== $defId = $this->getDefinitionId($aliasId, $container)) {
$container->setAlias($id, $defId)->setPublic($alias->isPublic())->setPrivate($alias->isPrivate());
}
}
}
/**
* {@inheritdoc}
*/
protected function processValue($value, $isRoot = false)
{
if (!$value instanceof Reference) {
return parent::processValue($value, $isRoot);
}
$defId = $this->getDefinitionId($id = (string) $value, $this->container);
return $defId !== $id ? new Reference($defId, $value->getInvalidBehavior()) : $value;
}
private function getDefinitionId(string $id, ContainerBuilder $container): string
{
if (!$container->hasAlias($id)) {
return $id;
}
$alias = $container->getAlias($id);
if ($alias->isDeprecated()) {
$referencingDefinition = $container->hasDefinition($this->currentId) ? $container->getDefinition($this->currentId) : $container->getAlias($this->currentId);
if (!$referencingDefinition->isDeprecated()) {
@trigger_error(sprintf('%s. It is being referenced by the "%s" %s.', rtrim($alias->getDeprecationMessage($id), '. '), $this->currentId, $container->hasDefinition($this->currentId) ? 'service' : 'alias'), \E_USER_DEPRECATED);
}
}
$seen = [];
do {
if (isset($seen[$id])) {
throw new ServiceCircularReferenceException($id, array_merge(array_keys($seen), [$id]));
}
$seen[$id] = true;
$id = (string) $container->getAlias($id);
} while ($container->hasAlias($id));
return $id;
}
}
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