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<?php |
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namespace Event; |
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use Psr\EventManager\EventManagerInterface; |
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use Psr\EventManager\EventInterface; |
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use Event\Event; |
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use Event\ListenerQueue; |
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class EventManager implements EventManagerInterface |
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{ |
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private $listenersHeap = []; |
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/** |
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* Attaches a listener to an event |
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* |
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* @param string $event the event to attach too |
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* @param callable $callback a callable function |
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* @param int $priority the priority at which the $callback executed |
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* @return bool true on success false on failure |
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*/ |
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public function attach($event, $callback, $priority = 0) |
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{ |
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if (is_string($event) |
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&& is_callable($callback) |
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&& is_integer($priority)) { |
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if (!array_key_exists($event, $this->listenersHeap)) { |
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$this->listenersHeap[$event] = new ListenerQueue; |
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} |
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$this->listenersHeap[$event]->add($callback, $priority); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Detaches a listener from an event |
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* |
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* @param string $event the event to attach too |
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* @param callable $callback a callable function |
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* @return bool true on success false on failure |
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*/ |
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public function detach($event, $callback) |
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{ |
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if (is_string($event) && is_callable($callback)) { |
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if (array_key_exists($event, $this->listenersHeap)) { |
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$this->listenersHeap[$event]->eject($callback); |
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} |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Clear all listeners for a given event |
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* |
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* @param string $event |
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* @return bool true on success false on failure |
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*/ |
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public function clearListeners($event) |
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{ |
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if (is_string($event)) { |
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$this->listenersHeap[$event] = null; |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Trigger an event |
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* |
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* Can accept an EventInterface or will create one if not passed |
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* |
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* @param string|EventInterface $event |
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* @param object|string $target |
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* @param array|object $argv - arguments for listener callback |
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* @return mixed |
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*/ |
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public function trigger($event, $target = null, $argv = []) |
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{ |
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$result = false; |
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if (is_string($event) || (is_object($event) && $event instanceof EventInterface) |
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&& (is_string($target) || is_object($target)) |
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&& (is_array($argv) || is_object($argv))) { |
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if (is_string($event)) { |
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$result = $event = new Event($event); |
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} |
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} |
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if ($event->isPropagationStopped()) { |
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return; |
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} |
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$event = $event->getName(); |
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$listeners = $this->listenersHeap[$event]->get(); |
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foreach ($listeners as $listener) { |
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call_user_func_array( |
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$listener['callback'], |
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$argv |
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); |
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} |
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return $result; |
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} |
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/** |
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* Custom method for check event listeners |
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* |
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* @param string $event |
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* @return bool true on success false on failure |
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*/ |
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1 |
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public function isExistListeners($event) |
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{ |
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1 |
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if (is_string($event)) { |
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1 |
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if (is_null($this->listenersHeap[$event])) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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Folleah /
psr7-event-emitter
