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<?php
namespace Drupal\migrate\Plugin;
use Drupal\migrate\Event\ImportAwareInterface;
use Drupal\migrate\Event\MigrateEvents;
use Drupal\migrate\Event\MigrateImportEvent;
use Drupal\migrate\Event\MigrateRollbackEvent;
use Drupal\migrate\Event\RollbackAwareInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
* Event subscriber to forward Migrate events to source and destination plugins.
*/
class PluginEventSubscriber implements EventSubscriberInterface {
/**
* Tries to invoke event handling methods on source and destination plugins.
*
* @param string $method
* The method to invoke.
* @param \Drupal\migrate\Event\MigrateImportEvent|\Drupal\migrate\Event\MigrateRollbackEvent $event
* The event that has triggered the invocation.
* @param string $plugin_interface
* The interface which plugins must implement in order to be invoked.
*/
protected function invoke($method, $event, $plugin_interface) {
$migration = $event->getMigration();
$source = $migration->getSourcePlugin();
if ($source instanceof $plugin_interface) {
call_user_func([$source, $method], $event);
}
$destination = $migration->getDestinationPlugin();
if ($destination instanceof $plugin_interface) {
call_user_func([$destination, $method], $event);
}
}
/**
* Forwards pre-import events to the source and destination plugins.
*
* @param \Drupal\migrate\Event\MigrateImportEvent $event
* The import event.
*/
public function preImport(MigrateImportEvent $event) {
$this->invoke('preImport', $event, ImportAwareInterface::class);
}
/**
* Forwards post-import events to the source and destination plugins.
*
* @param \Drupal\migrate\Event\MigrateImportEvent $event
* The import event.
*/
public function postImport(MigrateImportEvent $event) {
$this->invoke('postImport', $event, ImportAwareInterface::class);
}
/**
* Forwards pre-rollback events to the source and destination plugins.
*
* @param \Drupal\migrate\Event\MigrateRollbackEvent $event
* The rollback event.
*/
public function preRollback(MigrateRollbackEvent $event) {
$this->invoke('preRollback', $event, RollbackAwareInterface::class);
}
/**
* Forwards post-rollback events to the source and destination plugins.
*
* @param \Drupal\migrate\Event\MigrateRollbackEvent $event
* The rollback event.
*/
public function postRollback(MigrateRollbackEvent $event) {
$this->invoke('postRollback', $event, RollbackAwareInterface::class);
}
/**
* {@inheritdoc}
*/
public static function getSubscribedEvents(): array {
$events = [];
$events[MigrateEvents::PRE_IMPORT][] = ['preImport'];
$events[MigrateEvents::POST_IMPORT][] = ['postImport'];
$events[MigrateEvents::PRE_ROLLBACK][] = ['preRollback'];
$events[MigrateEvents::POST_ROLLBACK][] = ['postRollback'];
return $events;
}
}
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