public function LibraryItemFieldFormatter::viewElements in Library 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/LibraryItemFieldFormatter.php, line 30

Class

LibraryItemFieldFormatter

Plugin implementation of the 'library_item_field_formatter' formatter.

Namespace

Drupal\library\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) : array {
  $elements = [
    '#type' => 'table',
    '#title' => $this
      ->t('Library items'),
    '#header' => [
      'Barcode',
      'Library status',
      'Notes',
      'Actions',
    ],
  ];
  $rows = [];
  foreach ($items as $delta => $target) {

    /** @var \Drupal\library\Entity\LibraryItem $item */
    $item = \Drupal::entityTypeManager()
      ->getStorage('library_item')
      ->load($target
      ->getValue()['target_id']);
    if ($item
      ->get('barcode')->value || $item
      ->get('in_circulation')->value) {
      $rows[$delta]['barcode'] = nl2br(new HtmlEscapedText($item
        ->get('barcode')->value));
      $rows[$delta]['library_status'] = $this
        ->checkAvailability($item
        ->get('in_circulation')->value, $item
        ->get('library_status')->value);
      $rows[$delta]['notes'] = nl2br(new HtmlEscapedText($item
        ->get('notes')->value));
      $actions = $this
        ->getActions($item
        ->get('in_circulation')->value, $item
        ->get('library_status')->value, $target
        ->getValue()['target_id']);
      if ($actions) {
        $actions = [
          '#type' => 'operations',
          '#links' => $actions,
        ];
        $rows[$delta]['actions'] = \Drupal::service('renderer')
          ->render($actions);
      }
      else {
        unset($elements['#header'][3]);
      }
    }
  }
  $elements['#rows'] = $rows;
  return $elements;
}