Issue #3452591 by sethhill: Duplicate action is available to users without...

Issue #3452591 by sethhill: Duplicate action is available to users without permissions to create paragraphs.

src/Element/LayoutParagraphsBuilder.php

@@ -278,7 +278,7 @@ class LayoutParagraphsBuilder extends RenderElement implements ContainerFactoryP
       '#uuid' => $entity->uuid(),
       '#layout_paragraphs_layout' => $this->layoutParagraphsLayout,
       '#edit_access' => $this->editAccess($entity),
-      '#duplicate_access' => $this->createAccess() && $this->checkCardinality(),
+      '#duplicate_access' => $this->duplicateAccess($entity) && $this->checkCardinality(),
       '#delete_access' => $this->deleteAccess($entity),
     ];
     $build['#attached']['drupalSettings']['lpBuilder']['uiElements'][$entity->uuid()] = [];
@@ -528,8 +528,8 @@ class LayoutParagraphsBuilder extends RenderElement implements ContainerFactoryP
   /**
    * Returns an AccessResult object.
    *
-   * @return \Drupal\Core\Access\AccessResultInterface
-   *   True if user can edit.
+   * @return bool
+   *   True if user can create.
    */
   protected function createAccess() {
     $access = new AccessResultAllowed();
@@ -539,6 +539,23 @@ class LayoutParagraphsBuilder extends RenderElement implements ContainerFactoryP
     return $access->isAllowed();
   }
 
+  /**
+   * Returns an AccessResult object.
+   *
+   * @param \Drupal\paragraphs\ParagraphInterface $paragraph
+   *   The paragraph entity.
+   *
+   * @return bool
+   *   True if user can duplicate.
+   */
+  protected function duplicateAccess(ParagraphInterface $paragraph) {
+    if ($this->isTranslating() && !($this->supportsAsymmetricTranslations())) {
+      $access = new AccessResultForbidden('Cannot duplicate paragraphs while in translation mode.');
+      return $access->isAllowed();
+    }
+    return $paragraph->access('create');
+  }
+
   /**
    * Returns TRUE if in translation context.
    *