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<?php
declare(strict_types=1);
namespace EngineWorks\ProgressStatus;
use LogicException;
use SplObserver;
use SplSubject;
/**
* Implementation of SplSubject interface using the ObserversSet object storage.
*/
trait SplSubjectWithObserversTrait
{
/** @var ObserversSet */
private $observers;
private function constructSplSubjectWithObservers(): void
$this->observers = new ObserversSet();
}
public function attach(SplObserver $observer): void
$this->observers->attach($observer);
public function detach(SplObserver $observer): void
$this->observers->detach($observer);
public function notify(): void
if (! $this instanceof SplSubject) {
/** @psalm-var object $this Psalm identify $this as empty-mixed */
throw new LogicException(sprintf('Object %s is not an instance of SplSubject', get_class($this)));
foreach ($this->getObservers() as $observer) {
$observer->update($this);
private function getObservers(): ObserversSet
return $this->observers;
eclipxe13 /
engineworks-progress-status
