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<?php |
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/** |
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* Created by Gorlum 22.06.2017 16:50 |
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*/ |
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namespace Event; |
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use Common\GlobalContainer; |
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/** |
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* Class EventBus |
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* @package Event |
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*/ |
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class EventBus { |
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/** |
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* @var IObserver[][] $subscriptions |
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*/ |
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protected $subscriptions; |
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/** |
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* @var GlobalContainer $gc |
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*/ |
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protected $gc; |
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public function __construct(GlobalContainer $gc) { |
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$this->gc = $gc; |
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} |
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/** |
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* @param IObserver $observer |
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* @param int $eventId |
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* |
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* @return bool|mixed - false if observer not subscribed to event or observer subscription ID |
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*/ |
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public function haveSubscription(IObserver $observer, $eventId) { |
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if (!is_array($this->subscriptions[$eventId])) { |
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return false; |
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} |
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return array_search($observer, $this->subscriptions[$eventId]); |
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} |
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protected function unSubscribeFromOne(IObserver $observer, $eventId) { |
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if (($foundKey = $this->haveSubscription($observer, $eventId)) !== false) { |
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unset($this->subscriptions[$eventId][$foundKey]); |
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} |
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} |
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/** |
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* Unsubscribes observer from all events |
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* |
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* @param IObserver $observer |
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*/ |
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protected function unSubscribeFromAll(IObserver $observer) { |
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foreach ($this->subscriptions as $eventId => $cork) { |
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$this->unSubscribeFromOne($observer, $eventId); |
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} |
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} |
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public function subscribe(IObserver $observer, $eventId = EVENT_ALL) { |
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// In case of global subscription removing secondary subscriptions to avoid duplicate calls |
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View Code Duplication |
if ($eventId === EVENT_ALL) { |
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$this->unSubscribeFromAll($observer); |
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} elseif ($this->haveSubscription($observer, $eventId) !== false) { |
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// Observer already subscribed |
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return; |
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} |
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!isset($this->subscriptions[$eventId]) ? $this->subscriptions[$eventId] = [] : false; |
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$this->subscriptions[$eventId][] = $observer; |
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} |
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public function unSubscribe($observer, $eventId = EVENT_ALL) { |
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View Code Duplication |
if ($eventId === EVENT_ALL) { |
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$this->unSubscribeFromAll($observer); |
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} elseif ($this->haveSubscription($observer, $eventId) !== false) { |
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$this->unSubscribeFromOne($observer, $eventId); |
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} |
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} |
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public function dispatch(Event $event) { |
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$subscriptions = empty($this->subscriptions[$event->getType()]) ? [] : $this->subscriptions[$event->getType()]; |
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$subscriptions = $this->mergeEventAllObservers($subscriptions); |
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if (empty($subscriptions)) { |
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return; |
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} |
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$methodName = STR_OBSERVER_ENTRY_METHOD_NAME; |
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foreach ($subscriptions as $observer) { |
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if (is_object($observer) && method_exists($observer, $methodName)) { |
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$observer->$methodName($event); |
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} |
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} |
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} |
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/** |
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* @param IObserver[] $typeSubscriptions |
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* |
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* @return IObserver[] |
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*/ |
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protected function mergeEventAllObservers($typeSubscriptions) { |
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$eventAllObservers = empty($this->subscriptions[EVENT_ALL]) ? [] : $this->subscriptions[EVENT_ALL]; |
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foreach ($eventAllObservers as $object) { |
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if (!array_search($object, $typeSubscriptions)) { |
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$typeSubscriptions[] = $object; |
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} |
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} |
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return $typeSubscriptions; |
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} |
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} |
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supernova-ws /
SuperNova
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.