OEmbedFormatter.php in Drupal 8

Namespace

Drupal\media\Plugin\Field\FieldFormatter

File

core/modules/media/src/Plugin/Field/FieldFormatter/OEmbedFormatter.php

<?php

namespace Drupal\media\Plugin\Field\FieldFormatter;

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\FormatterBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Logger\LoggerChannelFactoryInterface;
use Drupal\Core\Messenger\MessengerInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Url;
use Drupal\media\Entity\MediaType;
use Drupal\media\IFrameUrlHelper;
use Drupal\media\OEmbed\Resource;
use Drupal\media\OEmbed\ResourceException;
use Drupal\media\OEmbed\ResourceFetcherInterface;
use Drupal\media\OEmbed\UrlResolverInterface;
use Drupal\media\Plugin\media\Source\OEmbedInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Plugin implementation of the 'oembed' formatter.
 *
 * @internal
 *   This is an internal part of the oEmbed system and should only be used by
 *   oEmbed-related code in Drupal core.
 *
 * @FieldFormatter(
 *   id = "oembed",
 *   label = @Translation("oEmbed content"),
 *   field_types = {
 *     "link",
 *     "string",
 *     "string_long",
 *   },
 * )
 */
class OEmbedFormatter extends FormatterBase implements ContainerFactoryPluginInterface {

  /**
   * The messenger service.
   *
   * @var \Drupal\Core\Messenger\MessengerInterface
   */
  protected $messenger;

  /**
   * The oEmbed resource fetcher.
   *
   * @var \Drupal\media\OEmbed\ResourceFetcherInterface
   */
  protected $resourceFetcher;

  /**
   * The oEmbed URL resolver service.
   *
   * @var \Drupal\media\OEmbed\UrlResolverInterface
   */
  protected $urlResolver;

  /**
   * The logger service.
   *
   * @var \Psr\Log\LoggerInterface
   */
  protected $logger;

  /**
   * The media settings config.
   *
   * @var \Drupal\Core\Config\ImmutableConfig
   */
  protected $config;

  /**
   * The iFrame URL helper service.
   *
   * @var \Drupal\media\IFrameUrlHelper
   */
  protected $iFrameUrlHelper;

  /**
   * Constructs an OEmbedFormatter instance.
   *
   * @param string $plugin_id
   *   The plugin ID for the formatter.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
   *   The definition of the field to which the formatter is associated.
   * @param array $settings
   *   The formatter settings.
   * @param string $label
   *   The formatter label display setting.
   * @param string $view_mode
   *   The view mode.
   * @param array $third_party_settings
   *   Any third party settings.
   * @param \Drupal\Core\Messenger\MessengerInterface $messenger
   *   The messenger service.
   * @param \Drupal\media\OEmbed\ResourceFetcherInterface $resource_fetcher
   *   The oEmbed resource fetcher service.
   * @param \Drupal\media\OEmbed\UrlResolverInterface $url_resolver
   *   The oEmbed URL resolver service.
   * @param \Drupal\Core\Logger\LoggerChannelFactoryInterface $logger_factory
   *   The logger factory service.
   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
   *   The config factory service.
   * @param \Drupal\media\IFrameUrlHelper $iframe_url_helper
   *   The iFrame URL helper service.
   */
  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, MessengerInterface $messenger, ResourceFetcherInterface $resource_fetcher, UrlResolverInterface $url_resolver, LoggerChannelFactoryInterface $logger_factory, ConfigFactoryInterface $config_factory, IFrameUrlHelper $iframe_url_helper) {
    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings);
    $this->messenger = $messenger;
    $this->resourceFetcher = $resource_fetcher;
    $this->urlResolver = $url_resolver;
    $this->logger = $logger_factory
      ->get('media');
    $this->config = $config_factory
      ->get('media.settings');
    $this->iFrameUrlHelper = $iframe_url_helper;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($plugin_id, $plugin_definition, $configuration['field_definition'], $configuration['settings'], $configuration['label'], $configuration['view_mode'], $configuration['third_party_settings'], $container
      ->get('messenger'), $container
      ->get('media.oembed.resource_fetcher'), $container
      ->get('media.oembed.url_resolver'), $container
      ->get('logger.factory'), $container
      ->get('config.factory'), $container
      ->get('media.oembed.iframe_url_helper'));
  }

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return [
      'max_width' => 0,
      'max_height' => 0,
    ] + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function viewElements(FieldItemListInterface $items, $langcode) {
    $element = [];
    $max_width = $this
      ->getSetting('max_width');
    $max_height = $this
      ->getSetting('max_height');
    foreach ($items as $delta => $item) {
      $main_property = $item
        ->getFieldDefinition()
        ->getFieldStorageDefinition()
        ->getMainPropertyName();
      $value = $item->{$main_property};
      if (empty($value)) {
        continue;
      }
      try {
        $resource_url = $this->urlResolver
          ->getResourceUrl($value, $max_width, $max_height);
        $resource = $this->resourceFetcher
          ->fetchResource($resource_url);
      } catch (ResourceException $exception) {
        $this->logger
          ->error("Could not retrieve the remote URL (@url).", [
          '@url' => $value,
        ]);
        continue;
      }
      if ($resource
        ->getType() === Resource::TYPE_LINK) {
        $element[$delta] = [
          '#title' => $resource
            ->getTitle(),
          '#type' => 'link',
          '#url' => Url::fromUri($value),
        ];
      }
      elseif ($resource
        ->getType() === Resource::TYPE_PHOTO) {
        $element[$delta] = [
          '#theme' => 'image',
          '#uri' => $resource
            ->getUrl()
            ->toString(),
          '#width' => $max_width ?: $resource
            ->getWidth(),
          '#height' => $max_height ?: $resource
            ->getHeight(),
        ];
      }
      else {
        $url = Url::fromRoute('media.oembed_iframe', [], [
          'query' => [
            'url' => $value,
            'max_width' => $max_width,
            'max_height' => $max_height,
            'hash' => $this->iFrameUrlHelper
              ->getHash($value, $max_width, $max_height),
          ],
        ]);
        $domain = $this->config
          ->get('iframe_domain');
        if ($domain) {
          $url
            ->setOption('base_url', $domain);
        }

        // Render videos and rich content in an iframe for security reasons.
        // @see: https://oembed.com/#section3
        $element[$delta] = [
          '#type' => 'html_tag',
          '#tag' => 'iframe',
          '#attributes' => [
            'src' => $url
              ->toString(),
            'frameborder' => 0,
            'scrolling' => FALSE,
            'allowtransparency' => TRUE,
            'width' => $max_width ?: $resource
              ->getWidth(),
            'height' => $max_height ?: $resource
              ->getHeight(),
            'class' => [
              'media-oembed-content',
            ],
          ],
          '#attached' => [
            'library' => [
              'media/oembed.formatter',
            ],
          ],
        ];

        // An empty title attribute will disable title inheritance, so only
        // add it if the resource has a title.
        $title = $resource
          ->getTitle();
        if ($title) {
          $element[$delta]['#attributes']['title'] = $title;
        }
        CacheableMetadata::createFromObject($resource)
          ->addCacheTags($this->config
          ->getCacheTags())
          ->applyTo($element[$delta]);
      }
    }
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    return parent::settingsForm($form, $form_state) + [
      'max_width' => [
        '#type' => 'number',
        '#title' => $this
          ->t('Maximum width'),
        '#default_value' => $this
          ->getSetting('max_width'),
        '#size' => 5,
        '#maxlength' => 5,
        '#field_suffix' => $this
          ->t('pixels'),
        '#min' => 0,
      ],
      'max_height' => [
        '#type' => 'number',
        '#title' => $this
          ->t('Maximum height'),
        '#default_value' => $this
          ->getSetting('max_height'),
        '#size' => 5,
        '#maxlength' => 5,
        '#field_suffix' => $this
          ->t('pixels'),
        '#min' => 0,
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    $summary = parent::settingsSummary();
    if ($this
      ->getSetting('max_width') && $this
      ->getSetting('max_height')) {
      $summary[] = $this
        ->t('Maximum size: %max_width x %max_height pixels', [
        '%max_width' => $this
          ->getSetting('max_width'),
        '%max_height' => $this
          ->getSetting('max_height'),
      ]);
    }
    elseif ($this
      ->getSetting('max_width')) {
      $summary[] = $this
        ->t('Maximum width: %max_width pixels', [
        '%max_width' => $this
          ->getSetting('max_width'),
      ]);
    }
    elseif ($this
      ->getSetting('max_height')) {
      $summary[] = $this
        ->t('Maximum height: %max_height pixels', [
        '%max_height' => $this
          ->getSetting('max_height'),
      ]);
    }
    return $summary;
  }

  /**
   * {@inheritdoc}
   */
  public static function isApplicable(FieldDefinitionInterface $field_definition) {
    if ($field_definition
      ->getTargetEntityTypeId() !== 'media') {
      return FALSE;
    }
    if (parent::isApplicable($field_definition)) {
      $media_type = $field_definition
        ->getTargetBundle();
      if ($media_type) {
        $media_type = MediaType::load($media_type);
        return $media_type && $media_type
          ->getSource() instanceof OEmbedInterface;
      }
    }
    return FALSE;
  }

}

Classes

Name	Description
OEmbedFormatter	Plugin implementation of the 'oembed' formatter.