diff core/modules/migrate/src/Plugin/PluginEventSubscriber.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/migrate/src/Plugin/PluginEventSubscriber.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,94 @@
+<?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() {
+    $events = [];
+    $events[MigrateEvents::PRE_IMPORT][] = ['preImport'];
+    $events[MigrateEvents::POST_IMPORT][] = ['postImport'];
+    $events[MigrateEvents::PRE_ROLLBACK][] = ['preRollback'];
+    $events[MigrateEvents::POST_ROLLBACK][] = ['postRollback'];
+
+    return $events;
+  }
+
+}