Issue #3360396: Add more menu links

src/Plugin/Derivative/EckTypesMenuItemsDeriver.php

+<?php
+
+namespace Drupal\eck\Plugin\Derivative;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides menu links for the different settings entity types & bundles.
+ */
+class EckTypesMenuItemsDeriver extends DeriverBase implements ContainerDeriverInterface {
+
+  use StringTranslationTrait;
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * The route provider.
+   *
+   * @var \Drupal\Core\Routing\RouteProviderInterface
+   */
+  protected $routeProvider;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, $basePluginId) {
+    $instance = new static();
+    $instance->entityTypeManager = $container->get('entity_type.manager');
+    $instance->moduleHandler = $container->get('module_handler');
+    $instance->routeProvider = $container->get('router.route_provider');
+
+    return $instance;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDerivativeDefinitions($base_plugin_definition) {
+    $entityTypes = $this->entityTypeManager
+      ->getStorage('eck_entity_type')
+      ->loadMultiple();
+
+    foreach ($entityTypes as $entityType) {
+      $id = sprintf('eck.entity_type.%s', $entityType->id());
+      $this->derivatives[$id] = [
+        'title' => $entityType->label(),
+        'route_name' => 'entity.eck_entity_type.edit_form',
+        'route_parameters' => [
+          'eck_entity_type' => $entityType->id(),
+        ],
+        'parent' => 'eck.entity_type.admin.structure.settings',
+        'id' => $id,
+      ] + $base_plugin_definition;
+
+      $parentId = implode(':', [$base_plugin_definition['id'], $id]);
+      $bundleType = sprintf('%s_type', $entityType->id());
+
+      if (!$this->entityTypeManager->hasDefinition($bundleType)) {
+        continue;
+      }
+
+      $bundles = $this->entityTypeManager
+        ->getStorage($bundleType)
+        ->loadMultiple();
+
+      foreach ($bundles as $bundle) {
+        $id = sprintf('eck.entity_type.%s.%s', $entityType->id(), $bundle->id());
+        $this->derivatives[$id] = [
+          'title' => $bundle->label(),
+          'route_name' => sprintf('entity.%s.edit_form', $bundleType),
+          'route_parameters' => [
+            $bundleType => $bundle->id(),
+          ],
+          'parent' => $parentId,
+          'id' => $id,
+        ] + $base_plugin_definition;
+
+        $bundleParentId = implode(':', [$base_plugin_definition['id'], $id]);
+        if ($this->moduleHandler->moduleExists('field_ui')) {
+          $this->derivatives['entity.' . $entityType->id() . '.field_ui_fields.' . $bundle->id()] = [
+            'title' => $this->t('Manage fields'),
+            'route_name' => 'entity.' . $entityType->id() . '.field_ui_fields',
+            'parent' => $bundleParentId,
+            'route_parameters' => [
+              $bundleType => $bundle->id(),
+            ],
+            'weight' => 1,
+          ] + $base_plugin_definition;
+          $this->derivatives['entity.entity_form_display.' . $entityType->id() . '.default.' . $bundle->id()] = [
+            'title' => $this->t('Manage form display'),
+            'route_name' => 'entity.entity_form_display.' . $entityType->id() . '.default',
+            'parent' => $bundleParentId,
+            'route_parameters' => [
+              $bundleType => $bundle->id(),
+            ],
+            'weight' => 2,
+          ] + $base_plugin_definition;
+          $this->derivatives['entity.entity_view_display.' . $entityType->id() . '.default.' . $bundle->id()] = [
+            'title' => $this->t('Manage display'),
+            'route_name' => 'entity.entity_view_display.' . $entityType->id() . '.default',
+            'parent' => $bundleParentId,
+            'route_parameters' => [
+              $bundleType => $bundle->id(),
+            ],
+            'weight' => 3,
+          ] + $base_plugin_definition;
+          if ($this->routeExists('entity.' . $entityType->id() . '.entity_permissions_form')) {
+            $this->derivatives['entity.entity_permissions_form.' . $entityType->id() . '.default.' . $bundle->id()] = [
+              'title' => $this->t('Manage permissions'),
+              'route_name' => 'entity.' . $entityType->id() . '.entity_permissions_form',
+              'parent' => $bundleParentId,
+              'route_parameters' => [
+                $bundleType => $bundle->id(),
+              ],
+              'weight' => 3,
+            ] + $base_plugin_definition;
+          }
+        }
+      }
+    }
+
+    return parent::getDerivativeDefinitions($base_plugin_definition);
+  }
+
+  /**
+   * Determine if a route exists by name.
+   *
+   * @param string $routeName
+   *   The name of the route to check.
+   *
+   * @return bool
+   *   Whether a route with that route name exists.
+   */
+  public function routeExists(string $routeName) {
+    return (count($this->routeProvider->getRoutesByNames([$routeName])) === 1);
+  }
+
+}