<?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\Translation\DependencyInjection;
 
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Exception\RuntimeException;
 use Symfony\Component\DependencyInjection\Reference;
 
 /**
  * Adds tagged translation.extractor services to translation extractor.
  */
 class TranslationExtractorPass implements CompilerPassInterface
 {
     private $extractorServiceId;
     private $extractorTag;
 
     public function __construct(string $extractorServiceId = 'translation.extractor', string $extractorTag = 'translation.extractor')
     {
         $this->extractorServiceId = $extractorServiceId;
         $this->extractorTag = $extractorTag;
     }
 
     public function process(ContainerBuilder $container)
     {
         if (!$container->hasDefinition($this->extractorServiceId)) {
             return;
         }
 
         $definition = $container->getDefinition($this->extractorServiceId);
 
         foreach ($container->findTaggedServiceIds($this->extractorTag, true) as $id => $attributes) {
             if (!isset($attributes[0]['alias'])) {
                 throw new RuntimeException(sprintf('The alias for the tag "translation.extractor" of service "%s" must be set.', $id));
             }
 
             $definition->addMethodCall('addExtractor', [$attributes[0]['alias'], new Reference($id)]);
         }
     }
 }