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Dispatcher.php
142 lines (128 loc) · 3.85 KB
/
Dispatcher.php
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<?php
/*
* This file is part of the slince/event-dispatcher package.
*
* (c) Slince <taosikai@yeah.net>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Slince\EventDispatcher;
use Slince\EventDispatcher\Exception\InvalidArgumentException;
class Dispatcher implements DispatcherInterface
{
/**
* Array of listeners.
*
* @var ListenerPriorityQueue[]
*/
protected $listeners = [];
/**
* {@inheritdoc}
*/
public function dispatch($eventName, EventInterface $event = null)
{
if ($eventName instanceof EventInterface) {
$event = $eventName;
} elseif (is_null($event)) {
$event = new Event($eventName, null);
}
if (isset($this->listeners[$event->getName()])) {
foreach ($this->listeners[$event->getName()] as $listener) {
if ($event->isPropagationStopped()) {
break;
}
call_user_func([$listener, 'handle'], $event);
}
}
}
/**
* {@inheritdoc}
*/
public function addListener($eventName, $listener, $priority = self::PRIORITY_DEFAULT)
{
if (!isset($this->listeners[$eventName])) {
$this->listeners[$eventName] = new ListenerPriorityQueue();
}
if (is_callable($listener)) {
$listener = CallableListener::createFromCallable($listener);
}
if (!$listener instanceof ListenerInterface) {
throw new InvalidArgumentException('The listener should be the implementation of the listenerInterface or callable');
}
$this->listeners[$eventName]->insert($listener, $priority);
}
/**
* {@inheritdoc}
*/
public function addSubscriber(SubscriberInterface $subscriber)
{
foreach ($subscriber->getSubscribedEvents() as $eventName => $action) {
$this->addListener($eventName, [$subscriber, $action]);
}
}
/**
* {@inheritdoc}
*/
public function removeListener($eventName, $listener)
{
if (empty($this->listeners[$eventName])) {
return;
}
if (is_callable($listener) && false === ($listener = CallableListener::findByCallable($listener))) {
return;
}
$this->listeners[$eventName]->detach($listener);
}
/**
* {@inheritdoc}
*/
public function removeSubscriber(SubscriberInterface $subscriber)
{
foreach ($subscriber->getSubscribedEvents() as $eventName => $action) {
$this->removeListener($eventName, [$subscriber, $action]);
}
}
/**
* {@inheritdoc}
*/
public function removeAllListeners($eventName = null)
{
if (!is_null($eventName) && isset($this->listeners[$eventName])) {
$this->listeners[$eventName]->clear();
} else {
foreach ($this->listeners as $queue) {
$queue->clear();
}
}
}
/**
* {@inheritdoc}
*/
public function hasListener($eventName, $listener)
{
if (!isset($this->listeners[$eventName])) {
return false;
}
if (is_callable($listener)) {
$listener = CallableListener::findByCallable($listener);
}
return $this->listeners[$eventName]->contains($listener);
}
/**
* {@inheritdoc}
*/
public function getListeners($eventName = null)
{
if (!is_null($eventName)) {
return isset($this->listeners[$eventName]) ?
$this->listeners[$eventName]->all() : [];
} else {
$listeners = [];
foreach ($this->listeners as $queue) {
$listeners = array_merge($listeners, $queue->all());
}
return $listeners;
}
}
}