/
LoggerChannelPass.php
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/
LoggerChannelPass.php
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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\MonologBundle\DependencyInjection\Compiler;
use Symfony\Component\DependencyInjection\Argument\BoundArgument;
use Symfony\Component\DependencyInjection\Reference;
use Symfony\Component\DependencyInjection\ChildDefinition;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\DefinitionDecorator;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
/**
* Replaces the default logger by another one with its own channel for tagged services.
*
* @author Christophe Coevoet <stof@notk.org>
*/
class LoggerChannelPass implements CompilerPassInterface
{
protected $channels = array('app');
public function process(ContainerBuilder $container)
{
if (!$container->hasDefinition('monolog.logger')) {
return;
}
// create channels necessary for the handlers
foreach ($container->findTaggedServiceIds('monolog.logger') as $id => $tags) {
foreach ($tags as $tag) {
if (empty($tag['channel']) || 'app' === $tag['channel']) {
continue;
}
$resolvedChannel = $container->getParameterBag()->resolveValue($tag['channel']);
$definition = $container->getDefinition($id);
$loggerId = sprintf('monolog.logger.%s', $resolvedChannel);
$this->createLogger($resolvedChannel, $loggerId, $container);
foreach ($definition->getArguments() as $index => $argument) {
if ($argument instanceof Reference && 'logger' === (string) $argument) {
$definition->replaceArgument($index, $this->changeReference($argument, $loggerId));
}
}
$calls = $definition->getMethodCalls();
foreach ($calls as $i => $call) {
foreach ($call[1] as $index => $argument) {
if ($argument instanceof Reference && 'logger' === (string) $argument) {
$calls[$i][1][$index] = $this->changeReference($argument, $loggerId);
}
}
}
$definition->setMethodCalls($calls);
if (\method_exists($definition, 'getBindings')) {
$binding = new BoundArgument(new Reference($loggerId));
// Mark the binding as used already, to avoid reporting it as unused if the service does not use a
// logger injected through the LoggerInterface alias.
$values = $binding->getValues();
$values[2] = true;
$binding->setValues($values);
$bindings = $definition->getBindings();
$bindings['Psr\Log\LoggerInterface'] = $binding;
$definition->setBindings($bindings);
}
}
}
// create additional channels
foreach ($container->getParameter('monolog.additional_channels') as $chan) {
if ($chan === 'app') {
continue;
}
$loggerId = sprintf('monolog.logger.%s', $chan);
$this->createLogger($chan, $loggerId, $container);
$container->getDefinition($loggerId)->setPublic(true);
}
$container->getParameterBag()->remove('monolog.additional_channels');
// wire handlers to channels
$handlersToChannels = $container->getParameter('monolog.handlers_to_channels');
foreach ($handlersToChannels as $handler => $channels) {
foreach ($this->processChannels($channels) as $channel) {
try {
$logger = $container->getDefinition($channel === 'app' ? 'monolog.logger' : 'monolog.logger.'.$channel);
} catch (InvalidArgumentException $e) {
$msg = 'Monolog configuration error: The logging channel "'.$channel.'" assigned to the "'.substr($handler, 16).'" handler does not exist.';
throw new \InvalidArgumentException($msg, 0, $e);
}
$logger->addMethodCall('pushHandler', array(new Reference($handler)));
}
}
}
public function getChannels()
{
return $this->channels;
}
protected function processChannels($configuration)
{
if (null === $configuration) {
return $this->channels;
}
if ('inclusive' === $configuration['type']) {
return $configuration['elements'] ?: $this->channels;
}
return array_diff($this->channels, $configuration['elements']);
}
protected function createLogger($channel, $loggerId, ContainerBuilder $container)
{
if (!in_array($channel, $this->channels)) {
$logger = new ChildDefinition('monolog.logger_prototype');
$logger->replaceArgument(0, $channel);
$container->setDefinition($loggerId, $logger);
$this->channels[] = $channel;
}
}
/**
* Creates a copy of a reference and alters the service ID.
*
* @param Reference $reference
* @param string $serviceId
*
* @return Reference
*/
private function changeReference(Reference $reference, $serviceId)
{
if (method_exists($reference, 'isStrict')) {
// Stay compatible with Symfony 2
return new Reference($serviceId, $reference->getInvalidBehavior(), $reference->isStrict(false));
}
return new Reference($serviceId, $reference->getInvalidBehavior());
}
}