function ContainerAwareEventDispatcher::dispatch

File

core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php, line 89

Class

ContainerAwareEventDispatcher

A performance optimized container aware event dispatcher.

Namespace

Code

public function dispatch(object $event, ?string $eventName = NULL) : object {
    $event_name = $eventName ?? get_class($event);
    if (isset($this->listeners[$event_name])) {
        // Sort listeners if necessary.
        if (isset($this->unsorted[$event_name])) {
            krsort($this->listeners[$event_name]);
            unset($this->unsorted[$event_name]);
        }
        $stoppable = $event instanceof StoppableEventInterface;
        // Invoke listeners and resolve callables if necessary.
        foreach ($this->listeners[$event_name] as &$definitions) {
            foreach ($definitions as &$definition) {
                if (!isset($definition['callable'])) {
                    $definition['callable'] = [
                        $this->container
                            ->get($definition['service'][0]),
                        $definition['service'][1],
                    ];
                }
                if (is_array($definition['callable']) && isset($definition['callable'][0]) && $definition['callable'][0] instanceof \Closure) {
                    $definition['callable'][0] = $definition['callable'][0]();
                }
                call_user_func($definition['callable'], $event, $event_name, $this);
                if ($stoppable && $event->isPropagationStopped()) {
                    return $event;
                }
            }
        }
    }
    return $event;
}