class FieldUiLocalTask

class FieldUiLocalTask extends DeriverBase implements ContainerDeriverInterface {
    use StringTranslationTrait;
    
    /**
     * The route provider.
     *
     * @var \Drupal\Core\Routing\RouteProviderInterface
     */
    protected $routeProvider;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The entity display repository.
     *
     * @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface
     */
    protected $entityDisplayRepository;
    
    /**
     * Creates a FieldUiLocalTask object.
     *
     * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
     *   The route provider.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
     *   The translation manager.
     * @param \Drupal\Core\Entity\EntityDisplayRepositoryInterface $entity_display_repository
     *   The entity display repository.
     */
    public function __construct(RouteProviderInterface $route_provider, EntityTypeManagerInterface $entity_type_manager, TranslationInterface $string_translation, EntityDisplayRepositoryInterface $entity_display_repository) {
        $this->routeProvider = $route_provider;
        $this->entityTypeManager = $entity_type_manager;
        $this->stringTranslation = $string_translation;
        $this->entityDisplayRepository = $entity_display_repository;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('router.route_provider'), $container->get('entity_type.manager'), $container->get('string_translation'), $container->get('entity_display.repository'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $this->derivatives = [];
        foreach ($this->entityTypeManager
            ->getDefinitions() as $entity_type_id => $entity_type) {
            if ($entity_type->get('field_ui_base_route')) {
                $this->derivatives["overview_{$entity_type_id}"] = [
                    'route_name' => "entity.{$entity_type_id}.field_ui_fields",
                    'weight' => 1,
                    'title' => $this->t('Manage fields'),
                    'base_route' => "entity.{$entity_type_id}.field_ui_fields",
                ];
                // 'Manage form display' tab.
                $this->derivatives["form_display_overview_{$entity_type_id}"] = [
                    'route_name' => "entity.entity_form_display.{$entity_type_id}.default",
                    'weight' => 2,
                    'title' => $this->t('Manage form display'),
                    'base_route' => "entity.{$entity_type_id}.field_ui_fields",
                ];
                // 'Manage display' tab.
                $this->derivatives["display_overview_{$entity_type_id}"] = [
                    'route_name' => "entity.entity_view_display.{$entity_type_id}.default",
                    'weight' => 3,
                    'title' => $this->t('Manage display'),
                    'base_route' => "entity.{$entity_type_id}.field_ui_fields",
                ];
                // Field edit tab.
                $this->derivatives["field_edit_{$entity_type_id}"] = [
                    'route_name' => "entity.field_config.{$entity_type_id}_field_edit_form",
                    'title' => $this->t('Edit'),
                    'base_route' => "entity.field_config.{$entity_type_id}_field_edit_form",
                ];
                // Field settings tab.
                $this->derivatives["field_storage_{$entity_type_id}"] = [
                    'route_name' => "entity.field_config.{$entity_type_id}_storage_edit_form",
                    'title' => $this->t('Field settings'),
                    'base_route' => "entity.field_config.{$entity_type_id}_field_edit_form",
                ];
                // View and form modes secondary tabs.
                // The same base $path for the menu item (with a placeholder) can be
                // used for all bundles of a given entity type; but depending on
                // administrator settings, each bundle has a different set of view
                // modes available for customization. So we define menu items for all
                // view modes, and use a route requirement to determine which ones are
                // actually visible for a given bundle.
                $this->derivatives['field_form_display_default_' . $entity_type_id] = [
                    'title' => 'Default',
                    'route_name' => "entity.entity_form_display.{$entity_type_id}.default",
                    'parent_id' => "field_ui.fields:form_display_overview_{$entity_type_id}",
                    'weight' => -1,
                ];
                $this->derivatives['field_display_default_' . $entity_type_id] = [
                    'title' => 'Default',
                    'route_name' => "entity.entity_view_display.{$entity_type_id}.default",
                    'parent_id' => "field_ui.fields:display_overview_{$entity_type_id}",
                    'weight' => -1,
                ];
                // One local task for each form mode.
                $weight = 0;
                foreach ($this->entityDisplayRepository
                    ->getFormModes($entity_type_id) as $form_mode => $form_mode_info) {
                    $this->derivatives['field_form_display_' . $form_mode . '_' . $entity_type_id] = [
                        'title' => $form_mode_info['label'],
                        'route_name' => "entity.entity_form_display.{$entity_type_id}.form_mode",
                        'route_parameters' => [
                            'form_mode_name' => $form_mode,
                        ],
                        'parent_id' => "field_ui.fields:form_display_overview_{$entity_type_id}",
                        'weight' => $weight++,
                        'cache_tags' => $this->entityTypeManager
                            ->getDefinition('entity_form_display')
                            ->getListCacheTags(),
                    ];
                }
                // One local task for each view mode.
                $weight = 0;
                foreach ($this->entityDisplayRepository
                    ->getViewModes($entity_type_id) as $view_mode => $form_mode_info) {
                    $this->derivatives['field_display_' . $view_mode . '_' . $entity_type_id] = [
                        'title' => $form_mode_info['label'],
                        'route_name' => "entity.entity_view_display.{$entity_type_id}.view_mode",
                        'route_parameters' => [
                            'view_mode_name' => $view_mode,
                        ],
                        'parent_id' => "field_ui.fields:display_overview_{$entity_type_id}",
                        'weight' => $weight++,
                        'cache_tags' => $this->entityTypeManager
                            ->getDefinition('entity_view_display')
                            ->getListCacheTags(),
                    ];
                }
            }
        }
        foreach ($this->derivatives as &$entry) {
            $entry += $base_plugin_definition;
        }
        return $this->derivatives;
    }
    
    /**
     * Alters the base_route definition for field_ui local tasks.
     *
     * @param array $local_tasks
     *   An array of local tasks plugin definitions, keyed by plugin ID.
     */
    public function alterLocalTasks(&$local_tasks) {
        foreach ($this->entityTypeManager
            ->getDefinitions() as $entity_type_id => $entity_type) {
            if ($route_name = $entity_type->get('field_ui_base_route')) {
                $local_tasks["field_ui.fields:overview_{$entity_type_id}"]['base_route'] = $route_name;
                $local_tasks["field_ui.fields:form_display_overview_{$entity_type_id}"]['base_route'] = $route_name;
                $local_tasks["field_ui.fields:display_overview_{$entity_type_id}"]['base_route'] = $route_name;
                $local_tasks["field_ui.fields:field_form_display_default_{$entity_type_id}"]['base_route'] = $route_name;
                $local_tasks["field_ui.fields:field_display_default_{$entity_type_id}"]['base_route'] = $route_name;
                foreach ($this->entityDisplayRepository
                    ->getFormModes($entity_type_id) as $form_mode => $form_mode_info) {
                    $local_tasks['field_ui.fields:field_form_display_' . $form_mode . '_' . $entity_type_id]['base_route'] = $route_name;
                }
                foreach ($this->entityDisplayRepository
                    ->getViewModes($entity_type_id) as $view_mode => $form_mode_info) {
                    $local_tasks['field_ui.fields:field_display_' . $view_mode . '_' . $entity_type_id]['base_route'] = $route_name;
                }
            }
        }
    }

}