graphql_compose-1.0.0-beta20/src/Plugin/GraphQLCompose/FieldType/LinkItem.php

<?php

declare(strict_types=1);

namespace Drupal\graphql_compose\Plugin\GraphQLCompose\FieldType;

use Drupal\graphql_compose\Attribute\FieldType;
use Drupal\Component\Utility\UrlHelper;
use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Template\Attribute;
use Drupal\Core\Url;
use Drupal\graphql\GraphQL\Execution\FieldContext;
use Drupal\graphql_compose\Plugin\GraphQL\DataProducer\FieldProducerItemInterface;
use Drupal\graphql_compose\Plugin\GraphQL\DataProducer\FieldProducerTrait;
use Drupal\graphql_compose\Plugin\GraphQLCompose\GraphQLComposeFieldTypeBase;
use Drupal\link\LinkItemInterface;
use function Symfony\Component\String\u;

/**
 * {@inheritdoc}
 */
#[FieldType(
  id: "link",
  type_sdl: "Link",
)]
class LinkItem extends GraphQLComposeFieldTypeBase implements FieldProducerItemInterface {

  use FieldProducerTrait;

  /**
   * {@inheritdoc}
   */
  public function resolveFieldItem(FieldItemInterface $item, FieldContext $context) {

    if ($item->isEmpty()) {
      return NULL;
    }

    $url = ($item instanceof LinkItemInterface)
      ? $this->getUrlFromLink($item)
      : $this->getUrlFromOther($item);

    // Match the Url language to the field item language.
    $url->setOption('language', $this->languageManager->getLanguage($item->getLangcode()));

    /** @var \Drupal\Core\GeneratedUrl $generated */
    $generated = $url->toString(TRUE);
    $context->addCacheableDependency($generated);

    $result = [
      'title' => $this->getTitle($item),
      'url' => $generated->getGeneratedUrl(),
      'internal' => !$url->isExternal(),
    ];

    if ($this->moduleHandler->moduleExists('link_attributes')) {
      $attributes = [];

      foreach ($url->getOption('attributes') ?: [] as $id => $attribute) {
        $attributes[u($id)->camel()->toString()] = $attribute;
      }

      $result['attributes'] = new Attribute($attributes);
    }

    return $result;
  }

  /**
   * Get the title from a FieldItemInterface.
   *
   * @param \Drupal\Core\Field\FieldItemInterface $item
   *   The field item.
   *
   * @return string|null
   *   The title.
   */
  protected function getTitle(FieldItemInterface $item): ?string {
    return $item->title ?? NULL;
  }

  /**
   * Get the URL from a LinkItemInterface.
   *
   * @param \Drupal\link\LinkItemInterface $item
   *   The link item.
   *
   * @return \Drupal\Core\Url
   *   The URL.
   */
  protected function getUrlFromLink(LinkItemInterface $item): Url {
    return $item->getUrl();
  }

  /**
   * Get the URL from a FieldItemInterface.
   *
   * @param \Drupal\Core\Field\FieldItemInterface $item
   *   The field item.
   *
   * @return \Drupal\Core\Url
   *   The URL.
   */
  protected function getUrlFromOther(FieldItemInterface $item): Url {
    $path = $item->uri ?? NULL;

    return UrlHelper::isExternal($path)
      ? Url::fromUri($path)
      : Url::fromUserInput($path);
  }

}