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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\Argument\ArgumentInterface;
use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\TypedReference;
/**
* Emulates the invalid behavior if the reference is not found within the
* container.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
class ResolveInvalidReferencesPass implements CompilerPassInterface
{
private $container;
private $signalingException;
private $currentId;
/**
* Process the ContainerBuilder to resolve invalid references.
*/
public function process(ContainerBuilder $container)
{
$this->container = $container;
$this->signalingException = new RuntimeException('Invalid reference.');
try {
foreach ($container->getDefinitions() as $this->currentId => $definition) {
$this->processValue($definition);
}
} finally {
$this->container = $this->signalingException = null;
}
}
/**
* Processes arguments to determine invalid references.
*
* @return mixed
*
* @throws RuntimeException When an invalid reference is found
*/
private function processValue($value, int $rootLevel = 0, int $level = 0)
{
if ($value instanceof ServiceClosureArgument) {
$value->setValues($this->processValue($value->getValues(), 1, 1));
} elseif ($value instanceof ArgumentInterface) {
$value->setValues($this->processValue($value->getValues(), $rootLevel, 1 + $level));
} elseif ($value instanceof Definition) {
if ($value->isSynthetic() || $value->isAbstract()) {
return $value;
}
$value->setArguments($this->processValue($value->getArguments(), 0));
$value->setProperties($this->processValue($value->getProperties(), 1));
$value->setMethodCalls($this->processValue($value->getMethodCalls(), 2));
} elseif (\is_array($value)) {
$i = 0;
foreach ($value as $k => $v) {
try {
if (false !== $i && $k !== $i++) {
$i = false;
}
if ($v !== $processedValue = $this->processValue($v, $rootLevel, 1 + $level)) {
$value[$k] = $processedValue;
}
} catch (RuntimeException $e) {
if ($rootLevel < $level || ($rootLevel && !$level)) {
unset($value[$k]);
} elseif ($rootLevel) {
throw $e;
} else {
$value[$k] = null;
}
}
}
// Ensure numerically indexed arguments have sequential numeric keys.
if (false !== $i) {
$value = array_values($value);
}
} elseif ($value instanceof Reference) {
if ($this->container->has($id = (string) $value)) {
return $value;
}
$currentDefinition = $this->container->getDefinition($this->currentId);
// resolve decorated service behavior depending on decorator service
if ($currentDefinition->innerServiceId === $id && ContainerInterface::NULL_ON_INVALID_REFERENCE === $currentDefinition->decorationOnInvalid) {
return null;
}
$invalidBehavior = $value->getInvalidBehavior();
if (ContainerInterface::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE === $invalidBehavior && $value instanceof TypedReference && !$this->container->has($id)) {
$e = new ServiceNotFoundException($id, $this->currentId);
// since the error message varies by $id and $this->currentId, so should the id of the dummy errored definition
$this->container->register($id = sprintf('.errored.%s.%s', $this->currentId, $id), $value->getType())
->addError($e->getMessage());
return new TypedReference($id, $value->getType(), $value->getInvalidBehavior());
}
// resolve invalid behavior
if (ContainerInterface::NULL_ON_INVALID_REFERENCE === $invalidBehavior) {
$value = null;
} elseif (ContainerInterface::IGNORE_ON_INVALID_REFERENCE === $invalidBehavior) {
if (0 < $level || $rootLevel) {
throw $this->signalingException;
}
$value = null;
}
}
return $value;
}
}
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