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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;
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>
*
* @deprecated since 3.3, to be removed in 4.0. Use EventDispatcher with closure factories instead.
*/
class ContainerAwareEventDispatcher extends EventDispatcher
{
private $container;
/**
* The service IDs of the event listeners and subscribers.
*/
private $listenerIds = [];
/**
* The services registered as listeners.
*/
private $listeners = [];
public function __construct(ContainerInterface $container)
{
$this->container = $container;
$class = \get_class($this);
if ($this instanceof \PHPUnit_Framework_MockObject_MockObject || $this instanceof \Prophecy\Doubler\DoubleInterface) {
$class = get_parent_class($class);
}
if (__CLASS__ !== $class) {
@trigger_error(sprintf('The %s class is deprecated since Symfony 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.', __CLASS__), E_USER_DEPRECATED);
}
}
/**
* 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, $priority = 0)
{
@trigger_error(sprintf('The %s class is deprecated since Symfony 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.', __CLASS__), E_USER_DEPRECATED);
if (!\is_array($callback) || 2 !== \count($callback)) {
throw new \InvalidArgumentException('Expected an ["service", "method"] argument');
}
$this->listenerIds[$eventName][] = [$callback[0], $callback[1], $priority];
}
public function removeListener($eventName, $listener)
{
$this->lazyLoad($eventName);
if (isset($this->listenerIds[$eventName])) {
foreach ($this->listenerIds[$eventName] as $i => list($serviceId, $method)) {
$key = $serviceId.'.'.$method;
if (isset($this->listeners[$eventName][$key]) && $listener === [$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 $this->listenerIds || $this->listeners || parent::hasListeners();
}
if (isset($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($eventName);
}
/**
* {@inheritdoc}
*/
public function getListenerPriority($eventName, $listener)
{
$this->lazyLoad($eventName);
return parent::getListenerPriority($eventName, $listener);
}
/**
* 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, $class)
{
@trigger_error(sprintf('The %s class is deprecated since Symfony 3.3 and will be removed in 4.0. Use EventDispatcher with closure factories instead.', __CLASS__), E_USER_DEPRECATED);
foreach ($class::getSubscribedEvents() as $eventName => $params) {
if (\is_string($params)) {
$this->listenerIds[$eventName][] = [$serviceId, $params, 0];
} elseif (\is_string($params[0])) {
$this->listenerIds[$eventName][] = [$serviceId, $params[0], isset($params[1]) ? $params[1] : 0];
} else {
foreach ($params as $listener) {
$this->listenerIds[$eventName][] = [$serviceId, $listener[0], isset($listener[1]) ? $listener[1] : 0];
}
}
}
}
public function getContainer()
{
@trigger_error('The '.__METHOD__.'() method is deprecated since Symfony 3.3 as its class will be removed in 4.0. Inject the container or the services you need in your listeners/subscribers instead.', E_USER_DEPRECATED);
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 list($serviceId, $method, $priority)) {
$listener = $this->container->get($serviceId);
$key = $serviceId.'.'.$method;
if (!isset($this->listeners[$eventName][$key])) {
$this->addListener($eventName, [$listener, $method], $priority);
} elseif ($this->listeners[$eventName][$key] !== $listener) {
parent::removeListener($eventName, [$this->listeners[$eventName][$key], $method]);
$this->addListener($eventName, [$listener, $method], $priority);
}
$this->listeners[$eventName][$key] = $listener;
}
}
}
}