class EventsDataCollector

class EventsDataCollector extends DataCollector implements DrupalDataCollectorInterface, LateDataCollectorInterface {
    use StringTranslationTrait, DrupalDataCollectorTrait;
    
    /**
     * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
     */
    private $eventDispatcher;
    
    /**
     * EventsDataCollector constructor.
     *
     * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
     */
    public function __construct(EventDispatcherInterface $event_dispatcher) {
        $this->eventDispatcher = $event_dispatcher;
    }
    
    /**
     * {@inheritdoc}
     */
    public function collect(Request $request, Response $response, \Exception $exception = NULL) {
        $this->data = [
            'called_listeners' => [],
            'called_listeners_count' => 0,
            'not_called_listeners' => [],
            'not_called_listeners_count' => 0,
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function lateCollect() {
        if ($this->eventDispatcher instanceof EventDispatcherTraceableInterface) {
            $countCalled = 0;
            $calledListeners = $this->eventDispatcher
                ->getCalledListeners();
            foreach ($calledListeners as &$events) {
                foreach ($events as &$priority) {
                    foreach ($priority as &$listener) {
                        $countCalled++;
                        $listener['clazz'] = $this->getMethodData($listener['class'], $listener['method']);
                    }
                }
            }
            $countNotCalled = 0;
            $notCalledListeners = $this->eventDispatcher
                ->getNotCalledListeners();
            foreach ($notCalledListeners as $events) {
                foreach ($events as $priority) {
                    foreach ($priority as $listener) {
                        $countNotCalled++;
                    }
                }
            }
            $this->data = [
                'called_listeners' => $calledListeners,
                'called_listeners_count' => $countCalled,
                'not_called_listeners' => $notCalledListeners,
                'not_called_listeners_count' => $countNotCalled,
            ];
        }
    }
    
    /**
     * @return array
     */
    public function getCalledListeners() {
        return $this->data['called_listeners'];
    }
    
    /**
     * @return array
     */
    public function getNotCalledListeners() {
        return $this->data['not_called_listeners'];
    }
    
    /**
     * @return int
     */
    public function getCalledListenersCount() {
        return $this->data['called_listeners_count'];
    }
    
    /**
     * @return int
     */
    public function getNotCalledListenersCount() {
        return $this->data['not_called_listeners_count'];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getName() {
        return 'events';
    }
    
    /**
     * @return mixed
     */
    public function getData() {
        return $this->data;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getTitle() {
        return $this->t('Events');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPanelSummary() {
        return $this->t('Called listeners: @listeners', [
            '@listeners' => $this->getCalledListenersCount(),
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIcon() {
        return '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';
    }

}