MicrositeMenu.php in Entity Reference Hierarchy 8.2

Namespace

Drupal\entity_hierarchy_microsite\Plugin\Block

File

modules/entity_hierarchy_microsite/src/Plugin/Block/MicrositeMenu.php

<?php

namespace Drupal\entity_hierarchy_microsite\Plugin\Block;

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Menu\MenuTreeParameters;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\entity_hierarchy_microsite\Plugin\MicrositePluginTrait;
use Drupal\node\NodeInterface;
use Drupal\system\Plugin\Block\SystemMenuBlock;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Defines a class for a microsite menu.
 *
 * @Block(
 *   id = "entity_hierarchy_microsite_menu",
 *   admin_label = @Translation("Microsite Menu"),
 *   category = @Translation("Microsite"),
 *   context_definitions = {
 *     "node" = @ContextDefinition("entity:node", label = @Translation("Current node"))
 *   }
 * )
 */
class MicrositeMenu extends SystemMenuBlock implements ContainerFactoryPluginInterface {
  use MicrositePluginTrait {
    create as traitCreate;
    buildConfigurationForm as traitBuildConfigurationForm;
    submitConfigurationForm as traitSubmitConfigurationForm;
    defaultConfiguration as traitDefaultConfiguration;
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return parent::defaultConfiguration() + $this
      ->traitDefaultConfiguration();
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    return parent::buildConfigurationForm($form, $form_state) + $this
      ->traitBuildConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    return parent::submitConfigurationForm($form, $form_state) + $this
      ->traitSubmitConfigurationForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {

    /** @var \Drupal\entity_hierarchy_microsite\Plugin\Block\MicrositeMenu $instance */
    $instance = parent::create($container, $configuration, $plugin_id, $plugin_definition);
    return $instance
      ->setChildOfMicrositeLookup($container
      ->get('entity_hierarchy_microsite.microsite_lookup'))
      ->setEntityFieldManager($container
      ->get('entity_field.manager'));
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    $cache = new CacheableMetadata();
    if (!($node = $this
      ->getContextValue('node')) || !$node instanceof NodeInterface || !($microsites = $this->childOfMicrositeLookup
      ->findMicrositesForNodeAndField($node, $this->configuration['field']))) {
      $build = [];
      if ($node) {
        $cache
          ->addCacheableDependency($node);
      }
      $cache
        ->applyTo($build);
      return $build;
    }

    /** @var \Drupal\entity_hierarchy_microsite\Entity\MicrositeInterface $microsite */
    $microsite = reset($microsites);
    $cache
      ->addCacheableDependency($node);
    $cache
      ->addCacheableDependency($microsite);
    if ($home = $microsite
      ->getHome()) {
      $cache
        ->addCacheableDependency($home);
    }
    $menu_name = $this
      ->getDerivativeId();
    if ($this->configuration['expand_all_items']) {
      $parameters = new MenuTreeParameters();
      $active_trail = $this->menuActiveTrail
        ->getActiveTrailIds($menu_name);
      $parameters
        ->setActiveTrail($active_trail);
    }
    else {
      $parameters = $this->menuTree
        ->getCurrentRouteMenuTreeParameters($menu_name);
    }
    if ($home) {
      $parameters
        ->setRoot('entity_hierarchy_microsite:' . $home
        ->uuid());
    }

    // Adjust the menu tree parameters based on the block's configuration.
    $level = $this->configuration['level'];
    $depth = $this->configuration['depth'];
    $parameters
      ->setMinDepth($level);

    // When the depth is configured to zero, there is no depth limit. When depth
    // is non-zero, it indicates the number of levels that must be displayed.
    // Hence this is a relative depth that we must convert to an actual
    // (absolute) depth, that may never exceed the maximum depth.
    if ($depth > 0) {
      $parameters
        ->setMaxDepth(min($level + $depth - 1, $this->menuTree
        ->maxDepth()));
    }

    // For menu blocks with start level greater than 1, only show menu items
    // from the current active trail. Adjust the root according to the current
    // position in the menu in order to determine if we can show the subtree.
    if ($level > 1) {
      if (count($parameters->activeTrail) >= $level) {

        // Active trail array is child-first. Reverse it, and pull the new menu
        // root based on the parent of the configured start level.
        $menu_trail_ids = array_reverse(array_values($parameters->activeTrail));
        if ($depth > 0) {
          $parameters
            ->setMaxDepth(min($level - 1 + $depth - 1, $this->menuTree
            ->maxDepth()));
        }
      }
      else {
        $build = [];
        $cache
          ->applyTo($build);
        return $build;
      }
    }
    $tree = $this->menuTree
      ->load($menu_name, $parameters);
    $manipulators = [
      [
        'callable' => 'menu.default_tree_manipulators:checkAccess',
      ],
      [
        'callable' => 'menu.default_tree_manipulators:generateIndexAndSort',
      ],
    ];
    $tree = $this->menuTree
      ->transform($tree, $manipulators);
    $build = $this->menuTree
      ->build($tree);
    $cache
      ->applyTo($build);
    return $build;
  }

  /**
   * {@inheritdoc}
   */
  public function getDerivativeId() {
    return 'entity-hierarchy-microsite';
  }

}

Classes

Name	Description
MicrositeMenu	Defines a class for a microsite menu.