Issue #2968170 by joelpittet, idebr, heddn, quietone, mikelutz, tim.plunkett:...

Issue #2968170 by joelpittet, idebr, heddn, quietone, mikelutz, tim.plunkett: MenuLinkParent breaks migration when Parent URI is external

(cherry picked from commit 296ba5d8)

core/modules/migrate/src/Plugin/migrate/process/MenuLinkParent.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\migrate\Plugin\migrate\process;
 
+use Drupal\Component\Utility\UrlHelper;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Menu\MenuLinkManagerInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
@@ -85,17 +86,25 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
     catch (MigrateSkipRowException $e) {
 
     }
+
     if (isset($value[1])) {
       list($menu_name, $parent_link_path) = $value;
-      $url = Url::fromUserInput("/$parent_link_path");
-      if ($url->isRouted()) {
-        $links = $this->menuLinkManager->loadLinksByRoute($url->getRouteName(), $url->getRouteParameters(), $menu_name);
-        if (count($links) == 1) {
-          /** @var \Drupal\Core\Menu\MenuLinkInterface $link */
-          $link = reset($links);
-          return $link->getPluginId();
+
+      $links = [];
+      if (UrlHelper::isExternal($parent_link_path)) {
+        $links = $this->menuLinkStorage->loadByProperties(['link__uri' => $parent_link_path]);
+      }
+      else {
+        $url = Url::fromUserInput("/$parent_link_path");
+        if ($url->isRouted()) {
+          $links = $this->menuLinkManager->loadLinksByRoute($url->getRouteName(), $url->getRouteParameters(), $menu_name);
         }
       }
+      if (count($links) == 1) {
+        /** @var \Drupal\Core\Menu\MenuLinkInterface $link */
+        $link = reset($links);
+        return $link->getPluginId();
+      }
     }
     throw new MigrateSkipRowException(sprintf("No parent link found for plid '%d' in menu '%s'.", $parent_id, $value[0]));
   }

core/modules/migrate/tests/src/Unit/process/MenuLinkParentTest.php

@@ -2,8 +2,10 @@
 
 namespace Drupal\Tests\migrate\Unit\process;
 
+use Drupal\Component\Plugin\PluginInspectionInterface;
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\Core\Menu\MenuLinkManagerInterface;
+use Drupal\menu_link_content\MenuLinkContentInterface;
 use Drupal\migrate\MigrateSkipRowException;
 use Drupal\migrate\Plugin\migrate\process\MenuLinkParent;
 use Drupal\migrate\Plugin\MigrateProcessInterface;
@@ -35,4 +37,28 @@ public function testTransformException() {
     $this->plugin->transform([1, 'admin', NULL], $this->migrateExecutable, $this->row, 'destinationproperty');
   }
 
+  /**
+   * Tests the plugin when the parent is an external link.
+   *
+   * @covers ::transform
+   */
+  public function testTransformExternal() {
+    $migration_plugin = $this->prophesize(MigrateProcessInterface::class);
+    $menu_link_manager = $this->prophesize(MenuLinkManagerInterface::class);
+    $menu_link_storage = $this->prophesize(EntityStorageInterface::class);
+    $menu_link_content = $this->prophesize(MenuLinkContentInterface::class);
+    $menu_link_content->getPluginId()->willReturn('menu_link_content:fe151460-dfa2-4133-8864-c1746f28ab27');
+    $menu_link_storage->loadByProperties([
+      'link__uri' => 'http://example.com',
+    ])->willReturn([
+      9054 => $menu_link_content,
+    ]);
+    $plugin = $this->prophesize(PluginInspectionInterface::class);
+    $menu_link_manager->createInstance('menu_link_content:fe151460-dfa2-4133-8864-c1746f28ab27')->willReturn($plugin->reveal());
+    $plugin = new MenuLinkParent([], 'map', [], $migration_plugin->reveal(), $menu_link_manager->reveal(), $menu_link_storage->reveal());
+
+    $result = $plugin->transform([1, 'admin', 'http://example.com'], $this->migrateExecutable, $this->row, 'destinationproperty');
+    $this->assertEquals('menu_link_content:fe151460-dfa2-4133-8864-c1746f28ab27', $result);
+  }
+
 }