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<?php |
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namespace SmoothPhp\EventDispatcher; |
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use SmoothPhp\Contracts\EventDispatcher\EventDispatcher; |
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use SmoothPhp\Contracts\EventDispatcher\Projection; |
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use SmoothPhp\Contracts\EventDispatcher\Subscriber; |
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/** |
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* Class ProjectEnabledDispatcher |
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* @package SmoothPhp\EventDispatcher |
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* @author Simon Bennett <[email protected]> |
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*/ |
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final class ProjectEnabledDispatcher implements EventDispatcher |
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{ |
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/** |
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* @var array |
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*/ |
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private $listeners = []; |
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/** |
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* @param string $eventName |
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* @param array $arguments |
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* @param bool $runProjectionsOnly |
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*/ |
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public function dispatch($eventName, array $arguments, $runProjectionsOnly = false) |
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{ |
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if (!isset($this->listeners[$eventName])) { |
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return; |
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} |
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foreach ($this->getListenersInOrder($eventName) as $listener) { |
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if ($this->listenerCanRun($runProjectionsOnly, $listener)) { |
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call_user_func_array($listener, $arguments); |
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} |
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} |
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} |
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/** |
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* @param string $eventName |
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* @param callable $callable |
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* @param int $priority |
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*/ |
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public function addListener($eventName, callable $callable, $priority = 0) |
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{ |
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$this->listeners[$eventName][$priority][] = $callable; |
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unset($this->sorted[$eventName]); |
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} |
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/** |
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* @param Subscriber $subscriber |
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* @return void |
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*/ |
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public function addSubscriber(Subscriber $subscriber) |
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{ |
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foreach ($subscriber->getSubscribedEvents() as $eventName => $params) { |
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if (is_string($params)) { |
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$this->addListener($eventName, array($subscriber, $params)); |
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} elseif (is_string($params[0])) { |
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$this->addListener($eventName, array($subscriber, $params[0]), isset($params[1]) ? $params[1] : 0); |
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} else { |
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foreach ($params as $listener) { |
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$this->addListener($eventName, array($subscriber, $listener[0]), isset($listener[1]) ? $listener[1] : 0); |
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} |
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} |
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} |
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} |
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/** |
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* @param $runProjectionsOnly |
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* @param $listener |
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* @return bool |
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*/ |
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protected function listenerCanRun($runProjectionsOnly, $listener) |
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{ |
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return !$runProjectionsOnly || (is_array($listener) && $listener[0] instanceof Projection); |
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} |
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/** |
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* @param $eventName |
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* @return array |
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*/ |
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protected function getListenersInOrder($eventName) |
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{ |
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if (!isset($this->listeners[$eventName])) { |
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return []; |
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} |
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if (!isset($this->sorted[$eventName])) { |
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$this->sortListeners($eventName); |
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} |
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return $this->sorted[$eventName]; |
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} |
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/** |
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* Sorts the internal list of listeners for the given event by priority. |
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* |
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* @param string $eventName The name of the event. |
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*/ |
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private function sortListeners($eventName) |
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{ |
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$this->sorted[$eventName] = array(); |
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krsort($this->listeners[$eventName]); |
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$this->sorted[$eventName] = call_user_func_array('array_merge', $this->listeners[$eventName]); |
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} |
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} |
SmoothPhp /
CQRS-ES-Framework
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: