public function GdocFieldFormatter::viewElements in Embedded Google Docs Viewer 8

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/GdocFieldFormatter.php, line 53

Class

GdocFieldFormatter

Plugin implementation of the 'gdoc_field' formatter.

Namespace

Drupal\gdoc_field\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  foreach ($this
    ->getEntitiesToView($items, $langcode) as $delta => $file) {
    $entity = $this->fieldDefinition
      ->getTargetEntityTypeId();
    $bundle = $this->fieldDefinition
      ->getTargetBundle();
    $field_name = $this->fieldDefinition
      ->getName();
    $field_type = $this->fieldDefinition
      ->getType();
    $file_uri = $file
      ->getFileUri();
    $filename = $file
      ->getFileName();
    $uri_scheme = StreamWrapperManager::getScheme($file_uri);
    if ($uri_scheme == 'public') {
      $url = file_create_url($file
        ->getFileUri());
      $elements[$delta] = [
        '#theme' => 'gdoc_field',
        '#url' => $url,
        '#filename' => $filename,
        '#delta' => $delta,
        '#entity' => $entity,
        '#bundle' => $bundle,
        '#field_name' => $field_name,
        '#field_type' => $field_type,
        '#attached' => [
          'library' => [
            'gdoc_field/gdoc-field',
          ],
        ],
      ];
    }
    else {
      $this
        ->messenger()
        ->addError(t('The file (%file) is not publicly accessible. It must be publicly available in order for the Google Docs viewer to be able to access it.', [
        '%file' => $filename,
      ]), FALSE);
    }
  }
  return $elements;
}