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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); } }
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