public function ContainerAwareEventDispatcher::dispatch in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php \Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::dispatch()

File

core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php, line 91

Class

ContainerAwareEventDispatcher

A performance optimized container aware event dispatcher.

Namespace

Drupal\Component\EventDispatcher

Code

public function dispatch($event) {
  $event_name = 1 < \func_num_args() ? func_get_arg(1) : NULL;
  if (\is_object($event)) {
    $class_name = get_class($event);
    $event_name = $event_name ?? $class_name;
    $deprecation_message = 'Symfony\\Component\\EventDispatcher\\Event is deprecated in drupal:9.1.0 and will be replaced by Symfony\\Contracts\\EventDispatcher\\Event in drupal:10.0.0. A new Drupal\\Component\\EventDispatcher\\Event class is available to bridge the two versions of the class. See https://www.drupal.org/node/3159012';

    // Trigger a deprecation error if the deprecated Event class is used
    // directly.
    if ($class_name === 'Symfony\\Component\\EventDispatcher\\Event') {
      @trigger_error($deprecation_message, E_USER_DEPRECATED);
    }
    elseif ($class_name !== 'Drupal\\Component\\EventDispatcher\\Event' && strpos($class_name, 'Drupal') !== FALSE) {
      if (get_parent_class($event) === 'Symfony\\Component\\EventDispatcher\\Event') {
        @trigger_error($deprecation_message, E_USER_DEPRECATED);
      }
    }
  }
  elseif (\is_string($event) && (NULL === $event_name || $event_name instanceof ContractsEvent || $event_name instanceof Event)) {
    @trigger_error('Calling the Symfony\\Component\\EventDispatcher\\EventDispatcherInterface::dispatch() method with a string event name as the first argument is deprecated in drupal:9.1.0, an Event object will be required instead in drupal:10.0.0. See https://www.drupal.org/node/3154407', E_USER_DEPRECATED);
    $swap = $event;
    $event = $event_name ?? new Event();
    $event_name = $swap;
  }
  else {
    throw new \TypeError(sprintf('Argument 1 passed to "%s::dispatch()" must be an object, %s given.', ContractsEventDispatcherInterface::class, \gettype($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]);
    }

    // Invoke listeners and resolve callables if necessary.
    foreach ($this->listeners[$event_name] as $priority => &$definitions) {
      foreach ($definitions as $key => &$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, $this);
        if ($event
          ->isPropagationStopped()) {
          return $event;
        }
      }
    }
  }
  return $event;
}