archivesspace-8.x-1.x-dev/src/Plugin/Field/FieldFormatter/ASDateFormatter.php

<?php

namespace Drupal\archivesspace\Plugin\Field\FieldFormatter;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\FormatterBase;

/**
 * Plugin implementation of the 'ASDateFormatter'.
 *
 * @todo Use more of the available fields.
 *
 * @FieldFormatter(
 *   id = "as_date_default",
 *   label = @Translation("ArchivesSpace Date Formatter"),
 *   field_types = {
 *     "as_date"
 *   }
 * )
 */
class ASDateFormatter extends FormatterBase {

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode) {
    // @todo Clean this up, simply a WIP proof-of-concept.
    $output = [];
    foreach ($items as $delta => $item) {
      $display_value = '';
      if ($item->expression) {
        $display_value = $item->expression;
      }
      else {
        if (!empty($item->begin)) {
          $display_value .= $item->begin;
        }
        if (!empty($item->begin) && !empty($item->end)) {
          $display_value .= ' to ';
        }
        if (!empty($item->end)) {
          $display_value .= $item->end;
        }
      }
      if (!empty($item->date_type) && ($item->date_type == 'bulk')) {
        $date_type = $item->date_type;
        $display_value = "$date_type $display_value";
      }
      $output[$delta] = ['#plain_text' => $display_value];
    }

    return $output;
  }

}