| /vendor/evenement/evenement/src/Evenement/EventEmitterTrait.php |
|---|
| @@ -0,0 +1,67 @@ |
|---|
| <?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; |
| |
| trait EventEmitterTrait |
| { |
| protected $listeners = []; |
| |
| public function on($event, callable $listener) |
| { |
| if (!isset($this->listeners[$event])) { |
| $this->listeners[$event] = []; |
| } |
| |
| $this->listeners[$event][] = $listener; |
| } |
| |
| public function once($event, callable $listener) |
| { |
| $onceListener = function () use (&$onceListener, $event, $listener) { |
| $this->removeListener($event, $onceListener); |
| |
| call_user_func_array($listener, func_get_args()); |
| }; |
| |
| $this->on($event, $onceListener); |
| } |
| |
| public function removeListener($event, callable $listener) |
| { |
| if (isset($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 { |
| $this->listeners = []; |
| } |
| } |
| |
| public function listeners($event) |
| { |
| return isset($this->listeners[$event]) ? $this->listeners[$event] : []; |
| } |
| |
| public function emit($event, array $arguments = []) |
| { |
| foreach ($this->listeners($event) as $listener) { |
| call_user_func_array($listener, $arguments); |
| } |
| } |
| } |
