class Node

class Node extends WizardPluginBase {
    
    /**
     * Set the created column.
     *
     * @var string
     */
    protected $createdColumn = 'node_field_data-created';
    
    /**
     * The entity display repository.
     *
     * @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface
     */
    protected $entityDisplayRepository;
    
    /**
     * The entity field manager.
     *
     * @var \Drupal\Core\Entity\EntityFieldManagerInterface
     */
    protected $entityFieldManager;
    
    /**
     * Node constructor.
     *
     * @param array $configuration
     *   The plugin configuration.
     * @param string $plugin_id
     *   The plugin ID.
     * @param mixed $plugin_definition
     *   The plugin definition.
     * @param \Drupal\Core\Entity\EntityTypeBundleInfoInterface $bundle_info_service
     *   The entity bundle info service.
     * @param \Drupal\Core\Entity\EntityDisplayRepositoryInterface $entity_display_repository
     *   The entity display repository service.
     * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
     *   The entity field manager.
     * @param \Drupal\Core\Menu\MenuParentFormSelectorInterface $parent_form_selector
     *   The parent form selector service.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeBundleInfoInterface $bundle_info_service, EntityDisplayRepositoryInterface $entity_display_repository, EntityFieldManagerInterface $entity_field_manager, MenuParentFormSelectorInterface $parent_form_selector) {
        parent::__construct($configuration, $plugin_id, $plugin_definition, $bundle_info_service, $parent_form_selector);
        $this->entityDisplayRepository = $entity_display_repository;
        $this->entityFieldManager = $entity_field_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('entity_type.bundle.info'), $container->get('entity_display.repository'), $container->get('entity_field.manager'), $container->get('menu.parent_form_selector'));
    }
    
    /**
     * Overrides Drupal\views\Plugin\views\wizard\WizardPluginBase::getAvailableSorts().
     *
     * @return array
     *   An array whose keys are the available sort options and whose
     *   corresponding values are human readable labels.
     */
    public function getAvailableSorts() {
        // You can't execute functions in properties, so override the method
        return [
            'node_field_data-title:ASC' => $this->t('Title'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    protected function rowStyleOptions() {
        $options = [];
        $options['teasers'] = $this->t('teasers');
        $options['full_posts'] = $this->t('full posts');
        $options['titles'] = $this->t('titles');
        $options['titles_linked'] = $this->t('titles (linked)');
        $options['fields'] = $this->t('fields');
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function defaultDisplayOptions() {
        $display_options = parent::defaultDisplayOptions();
        // Add permission-based access control.
        $display_options['access']['type'] = 'perm';
        $display_options['access']['options']['perm'] = 'access content';
        // Remove the default fields, since we are customizing them here.
        unset($display_options['fields']);
        // Add the title field, so that the display has content if the user switches
        // to a row style that uses fields.
        
        /* Field: Content: Title */
        $display_options['fields']['title']['id'] = 'title';
        $display_options['fields']['title']['table'] = 'node_field_data';
        $display_options['fields']['title']['field'] = 'title';
        $display_options['fields']['title']['entity_type'] = 'node';
        $display_options['fields']['title']['entity_field'] = 'title';
        $display_options['fields']['title']['label'] = '';
        $display_options['fields']['title']['alter']['alter_text'] = 0;
        $display_options['fields']['title']['alter']['make_link'] = 0;
        $display_options['fields']['title']['alter']['absolute'] = 0;
        $display_options['fields']['title']['alter']['trim'] = 0;
        $display_options['fields']['title']['alter']['word_boundary'] = 0;
        $display_options['fields']['title']['alter']['ellipsis'] = 0;
        $display_options['fields']['title']['alter']['strip_tags'] = 0;
        $display_options['fields']['title']['alter']['html'] = 0;
        $display_options['fields']['title']['hide_empty'] = 0;
        $display_options['fields']['title']['empty_zero'] = 0;
        $display_options['fields']['title']['settings']['link_to_entity'] = 1;
        $display_options['fields']['title']['plugin_id'] = 'field';
        return $display_options;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function defaultDisplayFiltersUser(array $form, FormStateInterface $form_state) {
        $filters = parent::defaultDisplayFiltersUser($form, $form_state);
        $tids = [];
        if ($values = $form_state->getValue([
            'show',
            'tagged_with',
        ])) {
            foreach ($values as $value) {
                $tids[] = $value['target_id'];
            }
        }
        if (!empty($tids)) {
            $vid = reset($form['displays']['show']['tagged_with']['#selection_settings']['target_bundles']);
            $filters['tid'] = [
                'id' => 'tid',
                'table' => 'taxonomy_index',
                'field' => 'tid',
                'value' => $tids,
                'vid' => $vid,
                'plugin_id' => 'taxonomy_index_tid',
            ];
            // If the user entered more than one valid term in the autocomplete
            // field, they probably intended both of them to be applied.
            if (count($tids) > 1) {
                $filters['tid']['operator'] = 'and';
                // Sort the terms so the filter will be displayed as it normally would
                // on the edit screen.
                sort($filters['tid']['value']);
            }
        }
        return $filters;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function pageDisplayOptions(array $form, FormStateInterface $form_state) {
        $display_options = parent::pageDisplayOptions($form, $form_state);
        $row_plugin = $form_state->getValue([
            'page',
            'style',
            'row_plugin',
        ]);
        $row_options = $form_state->getValue([
            'page',
            'style',
            'row_options',
        ], []);
        $this->display_options_row($display_options, $row_plugin, $row_options);
        return $display_options;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function blockDisplayOptions(array $form, FormStateInterface $form_state) {
        $display_options = parent::blockDisplayOptions($form, $form_state);
        $row_plugin = $form_state->getValue([
            'block',
            'style',
            'row_plugin',
        ]);
        $row_options = $form_state->getValue([
            'block',
            'style',
            'row_options',
        ], []);
        $this->display_options_row($display_options, $row_plugin, $row_options);
        return $display_options;
    }
    
    /**
     * Set the row style and row style plugins to the display_options.
     */
    protected function display_options_row(&$display_options, $row_plugin, $row_options) {
        switch ($row_plugin) {
            case 'full_posts':
                $display_options['row']['type'] = 'entity:node';
                $display_options['row']['options']['view_mode'] = 'full';
                break;
            case 'teasers':
                $display_options['row']['type'] = 'entity:node';
                $display_options['row']['options']['view_mode'] = 'teaser';
                break;
            case 'titles_linked':
            case 'titles':
                $display_options['row']['type'] = 'fields';
                $display_options['fields']['title']['id'] = 'title';
                $display_options['fields']['title']['table'] = 'node_field_data';
                $display_options['fields']['title']['field'] = 'title';
                $display_options['fields']['title']['settings']['link_to_entity'] = $row_plugin === 'titles_linked';
                $display_options['fields']['title']['plugin_id'] = 'field';
                break;
        }
    }
    
    /**
     * Overrides Drupal\views\Plugin\views\wizard\WizardPluginBase::buildFilters().
     *
     * Add some options for filter by taxonomy terms.
     */
    protected function buildFilters(&$form, FormStateInterface $form_state) {
        parent::buildFilters($form, $form_state);
        if (isset($form['displays']['show']['type'])) {
            $selected_bundle = static::getSelected($form_state, [
                'show',
                'type',
            ], 'all', $form['displays']['show']['type']);
        }
        // Add the "tagged with" filter to the view.
        // We construct this filter using taxonomy_index.tid (which limits the
        // filtering to a specific vocabulary) rather than
        // taxonomy_term_field_data.name (which matches terms in any vocabulary).
        // This is because it is a more commonly-used filter that works better with
        // the autocomplete UI, and also to avoid confusion with other vocabularies
        // on the site that may have terms with the same name but are not used for
        // free tagging.
        // The downside is that if there *is* more than one vocabulary on the site
        // that is used for free tagging, the wizard will only be able to make the
        // "tagged with" filter apply to one of them (see below for the method it
        // uses to choose).
        // Find all "tag-like" taxonomy fields associated with the view's
        // entities. If a particular entity type (i.e., bundle) has been
        // selected above, then we only search for taxonomy fields associated
        // with that bundle. Otherwise, we use all bundles.
        $bundles = array_keys($this->bundleInfoService
            ->getBundleInfo($this->entityTypeId));
        // Double check that this is a real bundle before using it (since above
        // we added a dummy option 'all' to the bundle list on the form).
        if (isset($selected_bundle) && in_array($selected_bundle, $bundles)) {
            $bundles = [
                $selected_bundle,
            ];
        }
        $tag_fields = [];
        foreach ($bundles as $bundle) {
            $display = $this->entityDisplayRepository
                ->getFormDisplay($this->entityTypeId, $bundle);
            $taxonomy_fields = array_filter($this->entityFieldManager
                ->getFieldDefinitions($this->entityTypeId, $bundle), function (FieldDefinitionInterface $field_definition) {
                return $field_definition->getType() == 'entity_reference' && $field_definition->getSetting('target_type') == 'taxonomy_term';
            });
            foreach ($taxonomy_fields as $field_name => $field) {
                $widget = $display->getComponent($field_name);
                // We define "tag-like" taxonomy fields as ones that use the
                // "Autocomplete (Tags style)" widget.
                if (!empty($widget) && $widget['type'] == 'entity_reference_autocomplete_tags') {
                    $tag_fields[$field_name] = $field;
                }
            }
        }
        if (!empty($tag_fields)) {
            // If there is more than one "tag-like" taxonomy field available to
            // the view, we can only make our filter apply to one of them (as
            // described above). We choose 'field_tags' if it is available, since
            // that is created by the Standard install profile in core and also
            // commonly used by contrib modules; thus, it is most likely to be
            // associated with the "main" free-tagging vocabulary on the site.
            if (array_key_exists('field_tags', $tag_fields)) {
                $tag_field_name = 'field_tags';
            }
            else {
                $tag_field_name = key($tag_fields);
            }
            // Add the autocomplete textfield to the wizard.
            $form['displays']['show']['tagged_with'] = [
                '#type' => 'entity_autocomplete',
                '#title' => $this->t('tagged with'),
                '#target_type' => 'taxonomy_term',
                '#tags' => TRUE,
                '#size' => 30,
                '#maxlength' => 1024,
            ];
            $target_bundles = $tag_fields[$tag_field_name]->getSetting('handler_settings')['target_bundles'] ?? FALSE;
            if (!$target_bundles) {
                $target_bundles = array_keys($this->bundleInfoService
                    ->getBundleInfo('taxonomy_term'));
            }
            $form['displays']['show']['tagged_with']['#selection_settings']['target_bundles'] = $target_bundles;
        }
    }

}