public function ParagraphBlock::build in Paragraph blocks 3.x

Same name and namespace in other branches

1. 8.2 src/Plugin/Block/ParagraphBlock.php \Drupal\paragraph_blocks\Plugin\Block\ParagraphBlock::build()
2. 8 src/Plugin/Block/ParagraphBlock.php \Drupal\paragraph_blocks\Plugin\Block\ParagraphBlock::build()

Builds and returns the renderable array for this block plugin.

If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).

Return value

array A renderable array representing the content of the block.

Overrides BlockPluginInterface::build

See also

\Drupal\block\BlockViewBuilder

File

src/Plugin/Block/ParagraphBlock.php, line 91

Class

ParagraphBlock

Provides a block to a paragraph value on an entity.

Namespace

Drupal\paragraph_blocks\Plugin\Block

Code

public function build() {

  // Get the referencing and referenced entity.

  /** @var \Drupal\Core\Entity\EntityInterface $entity */
  $paragraph = NULL;
  $entity = $this
    ->getContextEntity();
  if ($entity) {
    $referenced_entities = $entity
      ->get($this->fieldName)
      ->referencedEntities();
    if (isset($referenced_entities[$this->fieldDelta])) {
      $paragraph = $referenced_entities[$this->fieldDelta];
    }
  }
  if (!$paragraph) {

    // The Content group block exists on the page, but the page's Content
    // group has been removed.
    return [
      '#markup' => $this
        ->t('This block is broken. The Content group or the paragraph does not exist.'),
    ];
  }

  // Build the render array.

  /** @var \Drupal\Core\Entity\EntityViewBuilder $view_builder */
  $view_builder = $this->entityTypeManager
    ->getViewBuilder($paragraph
    ->getEntityTypeId());
  $build = $view_builder
    ->view($paragraph, 'default');

  // Add geysir contextual links.
  if (function_exists('geysir_contextual_links')) {
    $link_options = [
      'parent_entity_type' => $entity
        ->getEntityType()
        ->id(),
      'parent_entity' => $entity
        ->id(),
      'field' => $this->fieldName,
      'field_wrapper_id' => Html::getUniqueId('geysir--' . $this->fieldName),
      'delta' => $this->fieldDelta,
      'js' => 'nojs',
      'paragraph' => $paragraph
        ->id(),
    ];
    $build['#geysir_field_paragraph_links'] = geysir_contextual_links($link_options);
    $build['#theme_wrappers'][] = 'geysir_field_paragraph_wrapper';
    $build['#attributes']['data-geysir-field-paragraph-field-wrapper'] = $link_options['field_wrapper_id'];
  }

  // Set the cache data appropriately.
  CacheableMetadata::createFromObject($this
    ->getContext('entity'))
    ->applyTo($build);
  return $build;
}