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EventListener.php
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76 lines (65 loc) · 1.64 KB
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<?php
namespace Thenbsp\Wechat\Event;
class EventListener implements EventListenerInterface
{
/**
* list of listeners
*/
protected $listeners = array();
/**
* trigger event
*/
public function trigger($handler, Event $event)
{
if( $listener = $this->getListener($handler) ) {
return call_user_func_array($listener, array($event));
}
}
/**
* add listener
*/
public function addListener($handler, callable $callable)
{
if( !class_exists($handler) ) {
throw new \InvalidArgumentException(sprintf('Invlaid Handler "%s"', $handler));
}
if( !is_subclass_of($handler, Event::class) ) {
throw new \InvalidArgumentException(sprintf(
'The Handler "%s" must be extends "%s"', $handler, Event::class));
}
$this->listeners[$handler] = $callable;
return $this;
}
/**
* get listener
*/
public function getListener($handler)
{
if( $this->hasListener($handler) ) {
return $this->listeners[$handler];
}
}
/**
* has listener
*/
public function hasListener($handler)
{
return array_key_exists($handler, $this->listeners);
}
/**
* remove listener
*/
public function removeListener($handler)
{
if( $this->hasListener($handler) ) {
unset($this->listeners[$handler]);
}
}
/**
* get listeners
*/
public function getListeners()
{
return $this->listeners;
}
}