Issue #3298245: Hook to allow modules to alter translation entity being created

Closes #3298245

sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php

@@ -24,6 +24,9 @@ use Drupal\tmgmt\TMGMTException;
 use Drupal\Core\Render\Element;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\tmgmt\Entity\Job;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Content entity source plugin controller.
@@ -35,7 +38,44 @@ use Drupal\tmgmt\Entity\Job;
  *   ui = "Drupal\tmgmt_content\ContentEntitySourcePluginUi"
  * )
  */
-class ContentEntitySource extends SourcePluginBase implements SourcePreviewInterface, ContinuousSourceInterface {
+class ContentEntitySource extends SourcePluginBase implements ContainerFactoryPluginInterface, SourcePreviewInterface, ContinuousSourceInterface {
+
+  /**
+   * The module handler service.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * Construct an instance of the content entity source plugin.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler service.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, ModuleHandlerInterface $module_handler) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+    $this->moduleHandler = $module_handler;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('module_handler')
+    );
+  }
 
   /**
    * Returns the entity for the given job item.
@@ -624,6 +664,12 @@ class ContentEntitySource extends SourcePluginBase implements SourcePreviewInter
       }
     }
 
+    $this->moduleHandler->invokeAll('tmgmt_content_presave_translation', [
+      $translation,
+      $entity,
+      $data,
+    ]);
+
     if ($save) {
       $translation->save();
     }