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<?php |
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/** |
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* @Author : a.zinovyev |
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* @Package: emittr |
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* @License: http://www.opensource.org/licenses/mit-license.php |
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*/ |
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namespace xobotyi\emittr; |
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class EventEmitter implements Interfaces\EventEmitter |
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{ |
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public const EVENT_LISTENER_ADDED = 'listenerAdded'; |
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public const EVENT_LISTENER_REMOVED = 'listenerRemoved'; |
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/** |
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* @var Interfaces\EventEmitterGlobal; |
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*/ |
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private $eventEmitterGlobal; |
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private $eventListeners = []; |
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private $maxListenersCount = 10; |
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public function __construct(?Interfaces\EventEmitterGlobal $emitterGlobal = null) { |
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$this->setGlobalEmitter($emitterGlobal ?: EventEmitterGlobal::getInstance()); |
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} |
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public function emit(string $eventName, $payload = null) :self { |
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$event = new Event($eventName, $payload, get_called_class(), $this); |
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if (empty($this->eventListeners) || $this->eventEmitterGlobal::propagateEvent($event, $this->eventListeners)) { |
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$this->eventEmitterGlobal->propagateEventGlobal($event); |
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} |
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return $this; |
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} |
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public function on(string $eventName, $callback) :self { |
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$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, false, false); |
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$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
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return $this; |
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} |
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public function once(string $eventName, $callback) :self { |
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$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, true, false); |
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$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
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return $this; |
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} |
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public function prependListener(string $eventName, $callback) :self { |
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$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, false, true); |
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$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
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return $this; |
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} |
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public function prependOnceListener(string $eventName, $callback) :self { |
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$this->eventEmitterGlobal::storeCallback($this->eventListeners, $eventName, $callback, $this->maxListenersCount, true, true); |
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$this->emit(self::EVENT_LISTENER_ADDED, ['callback' => &$callback]); |
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return $this; |
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} |
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public function off(string $eventName, $callback) :self { |
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if (empty($this->eventListeners[$eventName])) { |
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return $this; |
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} |
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$this->eventListeners[$eventName] = \array_values(\array_filter($this->eventListeners[$eventName], function ($item) use (&$callback) { return $item[1] !== $callback; })); |
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$this->emit(self::EVENT_LISTENER_REMOVED, ['eventName' => $eventName, 'callback' => &$callback]); |
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if (empty($this->eventListeners[$eventName])) { |
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unset($this->eventListeners[$eventName]); |
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} |
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return $this; |
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} |
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public function removeAllListeners(?string $eventName = null) :self { |
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if ($eventName === null) { |
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foreach ($this->eventListeners as $eventName => $callbacks) { |
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foreach ($callbacks as &$callback) { |
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$this->emit(self::EVENT_LISTENER_REMOVED, [ |
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'eventName' => $eventName, |
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'callback' => &$callback[1], |
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]); |
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} |
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} |
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$this->eventListeners = []; |
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return $this; |
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} |
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if (empty($this->eventListeners[$eventName])) { |
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return $this; |
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} |
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foreach ($this->eventListeners[$eventName] as $callback) { |
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$this->emit(self::EVENT_LISTENER_REMOVED, ['eventName' => $eventName, 'callback' => &$callback[1]]); |
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} |
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unset($this->eventListeners[$eventName]); |
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return $this; |
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} |
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public function getEventNames() :array { |
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return empty($this->eventListeners) ? [] : \array_keys($this->eventListeners); |
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} |
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public function getListeners(?string $eventName = null) :array { |
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return $eventName ? $this->eventListeners[$eventName] ?? [] : $this->eventListeners; |
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} |
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public function getMaxListenersCount() :int { |
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return $this->maxListenersCount; |
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} |
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public function setMaxListenersCount(int $maxListenersCount) :self { |
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if ($maxListenersCount < 0) { |
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throw new \InvalidArgumentException('Listeners count must be greater or equal 0, got ' . $maxListenersCount); |
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} |
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$this->maxListenersCount = $maxListenersCount; |
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return $this; |
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} |
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public function getGlobalEmitter() :Interfaces\EventEmitterGlobal { |
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return $this->eventEmitterGlobal; |
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} |
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public function setGlobalEmitter(Interfaces\EventEmitterGlobal $emitterGlobal) :self { |
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$this->eventEmitterGlobal = $emitterGlobal; |
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return $this; |
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} |
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} |
xobotyi /
emittr
