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<?php
namespace Maatwebsite\Excel;
trait HasEventBus
{
/**
* @var array
*/
protected static $globalEvents = [];
/**
* @var array
*/
protected $events = [];
/**
* Register local event listeners.
*
* @param array $listeners
*/
public function registerListeners(array $listeners)
{
foreach ($listeners as $event => $listener) {
$this->events[$event][] = $listener;
}
}
public function clearListeners()
{
$this->events = [];
}
/**
* Register a global event listener.
*
* @param string $event
* @param callable $listener
*/
public static function listen(string $event, callable $listener)
{
static::$globalEvents[$event][] = $listener;
}
/**
* @param object $event
*/
public function raise($event)
{
foreach ($this->listeners($event) as $listener) {
$listener($event);
}
}
/**
* @param object $event
*
* @return callable[]
*/
public function listeners($event): array
{
$name = \get_class($event);
$localListeners = $this->events[$name] ?? [];
$globalListeners = static::$globalEvents[$name] ?? [];
return array_merge($globalListeners, $localListeners);
}
}