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<?php |
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declare(strict_types=1); |
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namespace N1215\Tsukuyomi\Event; |
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class EventManager implements EventManagerInterface |
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{ |
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/** |
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* @var array |
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* |
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* ex) |
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* [ |
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* 'eventName' => [ |
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* ['priority' => 1, 'callback' => [self::class, 'methodName']] |
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* ], |
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* ]; |
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*/ |
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private $listenerMapping = []; |
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/** |
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* @inheritDoc |
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*/ |
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public function attach(string $event, callable $callback, int $priority = 0): bool |
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{ |
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if (!isset($this->listenerMapping[$event])) { |
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$this->listenerMapping[$event] = []; |
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} |
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$this->listenerMapping[$event][] = [ |
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'priority' => $priority, |
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'callback' => $callback |
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]; |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function detach(string $event, callable $callback): bool |
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{ |
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foreach ($this->listenerMapping as $event => $listeners) { |
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foreach ($listeners as $index => $listener) { |
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if ($listener['callback'] === $callback) { |
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unset($listeners[$index]); |
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} |
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} |
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$this->listenerMapping[$event] = array_values($listeners); |
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} |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function clearListeners(string $event): void |
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{ |
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if (isset($this->listenerMapping[$event])) { |
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unset($this->listenerMapping[$event]); |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function trigger($event, $target = null, array $argv = []) |
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{ |
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if (is_string($event)) { |
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1 |
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$event = new Event($event, $target, $argv); |
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} |
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$listeners = $this->getListenersForEvent($event); |
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foreach ($listeners as $listener) { |
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call_user_func($listener['callback'], $event); |
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if ($event->isPropagationStopped()) { |
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return; |
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} |
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} |
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} |
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private function getListenersForEvent(EventInterface $event): array |
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{ |
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$eventName = $event->getName(); |
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if (!isset($this->listenerMapping[$eventName])) { |
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1 |
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return []; |
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} |
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$listeners = $this->listenerMapping[$eventName]; |
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uasort($listeners, function ($a, $b) { |
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if ($a['priority'] === $b['priority']) { |
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return 0; |
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} |
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return $a['priority'] < $b['priority'] ? -1 : 1; |
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}); |
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7 |
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return $listeners; |
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} |
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} |
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n1215 /
tsukuyomi
