<?php

namespace Drupal\site_users\Plugin\Field\FieldFormatter;

use Drupal\Core\Field\Attribute\FieldFormatter;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\FormatterBase;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Url;

/**
 * Formata o MathSciNet ID como link para o perfil de autor no MathSciNet.
 *
 * URL gerada: https://mathscinet.ams.org/mathscinet/author?AuthorID={id}
 *
 * @FieldFormatter(
 *   id = "site_users_mathscinet_link",
 *   label = @Translation("Link para o perfil MathSciNet"),
 *   field_types = {"integer"}
 * )
 */
#[FieldFormatter(
  id: 'site_users_mathscinet_link',
  label: new TranslatableMarkup('Link para o perfil MathSciNet'),
  field_types: ['integer'],
)]
class MathSciNetLinkFormatter extends FormatterBase {

  public static function isApplicable(FieldDefinitionInterface $field_definition): bool {
    return $field_definition->getName() === 'field_user_mathscinetid';
  }

  public function viewElements(FieldItemListInterface $items, $langcode): array {
    $elements = [];
    foreach ($items as $delta => $item) {
      $id = (string) $item->value;
      $elements[$delta] = [
        '#type' => 'link',
        '#title' => $id,
        '#url' => Url::fromUri('https://mathscinet.ams.org/mathscinet/author?AuthorID=' . $id),
        '#attributes' => ['target' => '_blank', 'rel' => 'noopener noreferrer'],
      ];
    }
    return $elements;
  }

}