Current File : //data/www_bck/varak.net_bck/ampache.varak.net/modules/Evenement/EventEmitter.php
<?php
/*
* This file is part of Evenement.
*
* (c) Igor Wiedler <igor@wiedler.ch>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Evenement;
class EventEmitter implements EventEmitterInterface
{
protected $listeners = array();
public function on($event, $listener)
{
if (!is_callable($listener)) {
throw new \InvalidArgumentException('The provided listener was not a valid callable.');
}
if (!isset($this->listeners[$event])) {
$this->listeners[$event] = array();
}
$this->listeners[$event][] = $listener;
}
public function once($event, $listener)
{
$that = $this;
$onceListener = function () use ($that, &$onceListener, $event, $listener) {
$that->removeListener($event, $onceListener);
call_user_func_array($listener, func_get_args());
};
$this->on($event, $onceListener);
}
public function removeListener($event, $listener)
{
if (isset($this->listeners[$event])) {
if (false !== $index = array_search($listener, $this->listeners[$event], true)) {
unset($this->listeners[$event][$index]);
}
}
}
public function removeAllListeners($event = null)
{
if ($event !== null) {
unset($this->listeners[$event]);
} else {
$this->listeners = array();
}
}
public function listeners($event)
{
return isset($this->listeners[$event]) ? $this->listeners[$event] : array();
}
public function emit($event, array $arguments = array())
{
foreach ($this->listeners($event) as $listener) {
call_user_func_array($listener, $arguments);
}
}
}
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