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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\EventDispatcher\DependencyInjection;
- use Symfony\Component\DependencyInjection\ContainerBuilder;
- use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
- /**
- * Compiler pass to register tagged services for an event dispatcher.
- */
- class RegisterListenersPass implements CompilerPassInterface
- {
- protected $dispatcherService;
- protected $listenerTag;
- protected $subscriberTag;
- /**
- * @param string $dispatcherService Service name of the event dispatcher in processed container
- * @param string $listenerTag Tag name used for listener
- * @param string $subscriberTag Tag name used for subscribers
- */
- public function __construct($dispatcherService = 'event_dispatcher', $listenerTag = 'kernel.event_listener', $subscriberTag = 'kernel.event_subscriber')
- {
- $this->dispatcherService = $dispatcherService;
- $this->listenerTag = $listenerTag;
- $this->subscriberTag = $subscriberTag;
- }
- public function process(ContainerBuilder $container)
- {
- if (!$container->hasDefinition($this->dispatcherService) && !$container->hasAlias($this->dispatcherService)) {
- return;
- }
- $definition = $container->findDefinition($this->dispatcherService);
- foreach ($container->findTaggedServiceIds($this->listenerTag) as $id => $events) {
- $def = $container->getDefinition($id);
- if (!$def->isPublic()) {
- throw new \InvalidArgumentException(sprintf('The service "%s" must be public as event listeners are lazy-loaded.', $id));
- }
- if ($def->isAbstract()) {
- throw new \InvalidArgumentException(sprintf('The service "%s" must not be abstract as event listeners are lazy-loaded.', $id));
- }
- foreach ($events as $event) {
- $priority = isset($event['priority']) ? $event['priority'] : 0;
- if (!isset($event['event'])) {
- throw new \InvalidArgumentException(sprintf('Service "%s" must define the "event" attribute on "%s" tags.', $id, $this->listenerTag));
- }
- if (!isset($event['method'])) {
- $event['method'] = 'on'.preg_replace_callback(array(
- '/(?<=\b)[a-z]/i',
- '/[^a-z0-9]/i',
- ), function ($matches) { return strtoupper($matches[0]); }, $event['event']);
- $event['method'] = preg_replace('/[^a-z0-9]/i', '', $event['method']);
- }
- $definition->addMethodCall('addListenerService', array($event['event'], array($id, $event['method']), $priority));
- }
- }
- foreach ($container->findTaggedServiceIds($this->subscriberTag) as $id => $attributes) {
- $def = $container->getDefinition($id);
- if (!$def->isPublic()) {
- throw new \InvalidArgumentException(sprintf('The service "%s" must be public as event subscribers are lazy-loaded.', $id));
- }
- if ($def->isAbstract()) {
- throw new \InvalidArgumentException(sprintf('The service "%s" must not be abstract as event subscribers are lazy-loaded.', $id));
- }
- // We must assume that the class value has been correctly filled, even if the service is created by a factory
- $class = $container->getParameterBag()->resolveValue($def->getClass());
- $interface = 'Symfony\Component\EventDispatcher\EventSubscriberInterface';
- if (!is_subclass_of($class, $interface)) {
- if (!class_exists($class, false)) {
- throw new \InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
- }
- throw new \InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, $interface));
- }
- $definition->addMethodCall('addSubscriberService', array($id, $class));
- }
- }
- }
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