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Editing: EventEmitterTrait.php

<?php

declare (strict_types=1);
/*
 * 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 RectorPrefix202411\Evenement;

use InvalidArgumentException;
use function count;
use function array_keys;
use function array_merge;
use function array_search;
use function array_unique;
use function array_values;
trait EventEmitterTrait
{
    protected $listeners = [];
    protected $onceListeners = [];
    public function on($event, callable $listener)
    {
        if ($event === null) {
            throw new InvalidArgumentException('event name must not be null');
        }
        if (!isset($this->listeners[$event])) {
            $this->listeners[$event] = [];
        }
        $this->listeners[$event][] = $listener;
        return $this;
    }
    public function once($event, callable $listener)
    {
        if ($event === null) {
            throw new InvalidArgumentException('event name must not be null');
        }
        if (!isset($this->onceListeners[$event])) {
            $this->onceListeners[$event] = [];
        }
        $this->onceListeners[$event][] = $listener;
        return $this;
    }
    public function removeListener($event, callable $listener)
    {
        if ($event === null) {
            throw new InvalidArgumentException('event name must not be null');
        }
        if (isset($this->listeners[$event])) {
            $index = array_search($listener, $this->listeners[$event], \true);
            if (\false !== $index) {
                unset($this->listeners[$event][$index]);
                if (count($this->listeners[$event]) === 0) {
                    unset($this->listeners[$event]);
                }
            }
        }
        if (isset($this->onceListeners[$event])) {
            $index = array_search($listener, $this->onceListeners[$event], \true);
            if (\false !== $index) {
                unset($this->onceListeners[$event][$index]);
                if (count($this->onceListeners[$event]) === 0) {
                    unset($this->onceListeners[$event]);
                }
            }
        }
    }
    public function removeAllListeners($event = null)
    {
        if ($event !== null) {
            unset($this->listeners[$event]);
        } else {
            $this->listeners = [];
        }
        if ($event !== null) {
            unset($this->onceListeners[$event]);
        } else {
            $this->onceListeners = [];
        }
    }
    public function listeners($event = null) : array
    {
        if ($event === null) {
            $events = [];
            $eventNames = array_unique(array_merge(array_keys($this->listeners), array_keys($this->onceListeners)));
            foreach ($eventNames as $eventName) {
                $events[$eventName] = array_merge(isset($this->listeners[$eventName]) ? $this->listeners[$eventName] : [], isset($this->onceListeners[$eventName]) ? $this->onceListeners[$eventName] : []);
            }
            return $events;
        }
        return array_merge(isset($this->listeners[$event]) ? $this->listeners[$event] : [], isset($this->onceListeners[$event]) ? $this->onceListeners[$event] : []);
    }
    public function emit($event, array $arguments = [])
    {
        if ($event === null) {
            throw new InvalidArgumentException('event name must not be null');
        }
        $listeners = [];
        if (isset($this->listeners[$event])) {
            $listeners = array_values($this->listeners[$event]);
        }
        $onceListeners = [];
        if (isset($this->onceListeners[$event])) {
            $onceListeners = array_values($this->onceListeners[$event]);
        }
        if (empty($listeners) === \false) {
            foreach ($listeners as $listener) {
                $listener(...$arguments);
            }
        }
        if (empty($onceListeners) === \false) {
            unset($this->onceListeners[$event]);
            foreach ($onceListeners as $listener) {
                $listener(...$arguments);
            }
        }
    }
}

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