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Diffstat (limited to 'vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php')
| -rw-r--r-- | vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php b/vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php new file mode 100644 index 00000000..b92defe6 --- /dev/null +++ b/vendor/symfony/event-dispatcher/ContainerAwareEventDispatcher.php @@ -0,0 +1,187 @@ +<?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; + +use Symfony\Component\DependencyInjection\ContainerInterface; + +/** + * Lazily loads listeners and subscribers from the dependency injection + * container. + * + * @author Fabien Potencier <fabien@symfony.com> + * @author Bernhard Schussek <bschussek@gmail.com> + * @author Jordan Alliot <jordan.alliot@gmail.com> + */ +class ContainerAwareEventDispatcher extends EventDispatcher +{ + /** + * The container from where services are loaded. + * + * @var ContainerInterface + */ + private $container; + + /** + * The service IDs of the event listeners and subscribers. + * + * @var array + */ + private $listenerIds = array(); + + /** + * The services registered as listeners. + * + * @var array + */ + private $listeners = array(); + + /** + * Constructor. + * + * @param ContainerInterface $container A ContainerInterface instance + */ + public function __construct(ContainerInterface $container) + { + $this->container = $container; + } + + /** + * Adds a service as event listener. + * + * @param string $eventName Event for which the listener is added + * @param array $callback The service ID of the listener service & the method + * name that has to be called + * @param int $priority The higher this value, the earlier an event listener + * will be triggered in the chain. + * Defaults to 0. + * + * @throws \InvalidArgumentException + */ + public function addListenerService($eventName, $callback, $priority = 0) + { + if (!is_array($callback) || 2 !== count($callback)) { + throw new \InvalidArgumentException('Expected an array("service", "method") argument'); + } + + $this->listenerIds[$eventName][] = array($callback[0], $callback[1], $priority); + } + + public function removeListener($eventName, $listener) + { + $this->lazyLoad($eventName); + + if (isset($this->listenerIds[$eventName])) { + foreach ($this->listenerIds[$eventName] as $i => $args) { + list($serviceId, $method, $priority) = $args; + $key = $serviceId.'.'.$method; + if (isset($this->listeners[$eventName][$key]) && $listener === array($this->listeners[$eventName][$key], $method)) { + unset($this->listeners[$eventName][$key]); + if (empty($this->listeners[$eventName])) { + unset($this->listeners[$eventName]); + } + unset($this->listenerIds[$eventName][$i]); + if (empty($this->listenerIds[$eventName])) { + unset($this->listenerIds[$eventName]); + } + } + } + } + + parent::removeListener($eventName, $listener); + } + + /** + * {@inheritdoc} + */ + public function hasListeners($eventName = null) + { + if (null === $eventName) { + return (bool) count($this->listenerIds) || (bool) count($this->listeners); + } + + if (isset($this->listenerIds[$eventName])) { + return true; + } + + return parent::hasListeners($eventName); + } + + /** + * {@inheritdoc} + */ + public function getListeners($eventName = null) + { + if (null === $eventName) { + foreach ($this->listenerIds as $serviceEventName => $args) { + $this->lazyLoad($serviceEventName); + } + } else { + $this->lazyLoad($eventName); + } + + return parent::getListeners($eventName); + } + + /** + * Adds a service as event subscriber. + * + * @param string $serviceId The service ID of the subscriber service + * @param string $class The service's class name (which must implement EventSubscriberInterface) + */ + public function addSubscriberService($serviceId, $class) + { + foreach ($class::getSubscribedEvents() as $eventName => $params) { + if (is_string($params)) { + $this->listenerIds[$eventName][] = array($serviceId, $params, 0); + } elseif (is_string($params[0])) { + $this->listenerIds[$eventName][] = array($serviceId, $params[0], isset($params[1]) ? $params[1] : 0); + } else { + foreach ($params as $listener) { + $this->listenerIds[$eventName][] = array($serviceId, $listener[0], isset($listener[1]) ? $listener[1] : 0); + } + } + } + } + + public function getContainer() + { + return $this->container; + } + + /** + * Lazily loads listeners for this event from the dependency injection + * container. + * + * @param string $eventName The name of the event to dispatch. The name of + * the event is the name of the method that is + * invoked on listeners. + */ + protected function lazyLoad($eventName) + { + if (isset($this->listenerIds[$eventName])) { + foreach ($this->listenerIds[$eventName] as $args) { + list($serviceId, $method, $priority) = $args; + $listener = $this->container->get($serviceId); + + $key = $serviceId.'.'.$method; + if (!isset($this->listeners[$eventName][$key])) { + $this->addListener($eventName, array($listener, $method), $priority); + } elseif ($listener !== $this->listeners[$eventName][$key]) { + parent::removeListener($eventName, array($this->listeners[$eventName][$key], $method)); + $this->addListener($eventName, array($listener, $method), $priority); + } + + $this->listeners[$eventName][$key] = $listener; + } + } + } +} |