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<?php |
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/** |
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* Bluz Framework Component |
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* |
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* @copyright Bluz PHP Team |
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* @link https://github.com/bluzphp/framework |
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*/ |
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declare(strict_types=1); |
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namespace Bluz\EventManager; |
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/** |
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* Event manager |
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* |
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* @package Bluz\EventManager |
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* @link https://github.com/bluzphp/framework/wiki/EventManager |
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*/ |
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class EventManager |
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{ |
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/** |
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* @var array list of listeners |
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*/ |
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protected $listeners = []; |
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/** |
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* Attach callback to event |
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* |
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* @param string $eventName |
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* @param callable $callback |
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* @param integer $priority |
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* |
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* @return void |
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*/ |
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public function attach(string $eventName, callable $callback, int $priority = 1): void |
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{ |
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if (!isset($this->listeners[$eventName])) { |
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$this->listeners[$eventName] = []; |
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} |
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if (!isset($this->listeners[$eventName][$priority])) { |
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$this->listeners[$eventName][$priority] = []; |
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} |
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$this->listeners[$eventName][$priority][] = $callback; |
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} |
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/** |
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* Trigger event |
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* |
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* @param string|Event $event |
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* @param string|object $target |
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* @param array|object $params |
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* |
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* @return string|object |
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* @throws EventException |
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*/ |
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public function trigger($event, $target = null, $params = null) |
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{ |
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if (!$event instanceof Event) { |
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$event = new Event($event, $target, $params); |
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} |
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if (false !== strpos($event->getName(), ':')) { |
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$namespace = substr($event->getName(), 0, strpos($event->getName(), ':')); |
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if (isset($this->listeners[$namespace])) { |
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$this->fire($this->listeners[$namespace], $event); |
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} |
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} |
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if (isset($this->listeners[$event->getName()])) { |
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$this->fire($this->listeners[$event->getName()], $event); |
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} |
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return $event->getTarget(); |
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} |
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/** |
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* Fire! |
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* |
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* @param array $listeners |
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* @param Event $event |
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* |
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* @return void |
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*/ |
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protected function fire(array $listeners, Event $event): void |
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{ |
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ksort($listeners); |
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foreach ($listeners as $list) { |
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foreach ($list as $listener) { |
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$result = $listener($event); |
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if (null === $result) { |
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// continue; |
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} elseif (false === $result) { |
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break 2; |
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} else { |
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$event->setTarget($result); |
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} |
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} |
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} |
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} |
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} |
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bluzphp /
framework
