public function DownloadLinkFormatter::viewElements in Download 8.2

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides FormatterInterface::viewElements

File

src/Plugin/Field/FieldFormatter/DownloadLinkFormatter.php, line 21

Contains \Drupal\download\Plugin\Field\FieldFormatter\DownloadLinkFormatter.

Class

DownloadLinkFormatter

Plugin annotation @FieldFormatter( id = "download_link_formatter", label = @Translation("Download link formatter"), field_types = {"download_link"} )

Namespace

Drupal\download\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $output = array();
  $entity = $items
    ->getEntity();
  foreach ($items as $delta => $item) {
    $element = array();
    $element['container'] = array(
      '#type' => 'container',
      '#attributes' => array(
        'class' => array(
          'download_link',
        ),
      ),
    );
    $valid_file_found = FALSE;
    $fname = NULL;
    if ($item->download_fields) {
      $fields = unserialize($item->download_fields);
      foreach ($fields as $fieldname) {
        $files = $entity->{$fieldname};
        if ($files instanceof FieldItemListInterface && !$files
          ->isEmpty()) {
          foreach ($files as $file) {
            $fileEntity = $file->entity;
            $uri = $fileEntity
              ->getFileUri();
            if (file_valid_uri($uri)) {
              $valid_file_found = TRUE;
              $fname = $items
                ->getName();
            }
          }
        }
      }
    }
    if ($valid_file_found) {
      $element['container']['value'] = array(
        '#type' => 'link',
        '#title' => $item
          ->get('download_label')
          ->getValue(),
        '#url' => Url::fromRoute('download.download', array(
          'bundle' => $entity
            ->bundle(),
          'entity_type' => $entity
            ->getEntityTypeId(),
          'fieldname' => $fname,
          'entity_id' => $entity
            ->id(),
          'delta' => $delta,
        )),
      );
      $output[$delta] = $element;
    }
  }
  return $output;
}