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Listener.php
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Listener.php
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<?php
namespace omnilight\events;
use omnilight\events\contracts\EmitterEventsProviderInterface;
use omnilight\events\contracts\ListenerMethodFinderInterface;
use yii\base\Component;
use yii\base\Event;
/**
* Class Listener
*/
class Listener
{
/**
* @var EmitterEventsProviderInterface
*/
private $eventsProvider;
/**
* @var ListenerMethodFinderInterface
*/
private $methodFinder;
function __construct(EmitterEventsProviderInterface $eventsProvider, ListenerMethodFinderInterface $methodFinder)
{
$this->eventsProvider = $eventsProvider;
$this->methodFinder = $methodFinder;
}
/**
* @param string | Component $emitter Class or class name that emits events
* @param string | object $listener Listener class or class name that will listen to those events
*/
public function bind($emitter, $listener)
{
$emitterReflection = new \ReflectionClass($emitter);
$listenerReflection = new \ReflectionClass($listener);
foreach ($this->eventsProvider->getEventNames($emitterReflection) as $eventName) {
$methodReflection = $this->methodFinder->getMethodForEvent($listenerReflection, $eventName);
if ($methodReflection === false) {
continue;
}
$handler = $this->createHandler($listener, $methodReflection);
if ($handler === false) {
continue;
}
if (is_string($emitter)) {
Event::on($emitter, $eventName, $handler);
} elseif ($emitter instanceof Component) {
$emitter->on($eventName, $handler);
}
}
}
/**
* @param string | object $listener
* @param \ReflectionMethod $methodReflection
* @return array
*/
protected function createHandler($listener, \ReflectionMethod $methodReflection)
{
if (is_string($listener) && $methodReflection->isStatic()) {
return [$listener, $methodReflection->getName()];
} elseif (is_object($listener) && $methodReflection->isStatic()) {
return [get_class($listener), $methodReflection->getName()];
} elseif (is_object($listener) && $methodReflection->isStatic() == false) {
return [$listener, $methodReflection->getName()];
}
return false;
}
/**
* @param string | Component $emitter Class or class name that emits events
* @param string | object $listener Listener class or class name that will listen to those events
*/
public function unbind($emitter, $listener)
{
$emitterReflection = new \ReflectionClass($emitter);
$listenerReflection = new \ReflectionClass($listener);
foreach ($this->eventsProvider->getEventNames($emitterReflection) as $eventName) {
$methodReflection = $this->methodFinder->getMethodForEvent($listenerReflection, $eventName);
if ($methodReflection === false) {
continue;
}
$handler = $this->createHandler($listener, $methodReflection);
if ($handler === false) {
continue;
}
if (is_string($emitter)) {
Event::off($emitter, $eventName, $handler);
} elseif ($emitter instanceof Component) {
$emitter->off($eventName, $handler);
}
}
}
}