MediaRevisionController.php in Media Revisions UI 8

Namespace

Drupal\media_revisions_ui\Controller

File

src/Controller/MediaRevisionController.php

<?php

namespace Drupal\media_revisions_ui\Controller;

use Drupal\Component\Utility\Xss;
use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Entity\EntityRepositoryInterface;
use Drupal\Core\Link;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\Url;
use Drupal\media\MediaInterface;
use Drupal\media\MediaStorage;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a list of media revisions for a given media.
 */
class MediaRevisionController extends ControllerBase {

  /**
   * The date formatter service.
   *
   * @var \Drupal\Core\Datetime\DateFormatterInterface
   */
  protected $dateFormatter;

  /**
   * The renderer service.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * The entity repository service.
   *
   * @var \Drupal\Core\Entity\EntityRepositoryInterface
   */
  protected $entityRepository;

  /**
   * Constructs a MediaRevisionController object.
   *
   * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
   *   The date formatter service.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer service.
   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
   *   The entity repository.
   */
  public function __construct(DateFormatterInterface $date_formatter, RendererInterface $renderer, EntityRepositoryInterface $entity_repository = NULL) {
    $this->dateFormatter = $date_formatter;
    $this->renderer = $renderer;
    $this->entityRepository = $entity_repository;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('date.formatter'), $container
      ->get('renderer'), $container
      ->get('entity.repository'));
  }

  /**
   * Generates an overview table of older revisions of media.
   *
   * @param \Drupal\media\MediaInterface $media
   *   A media object.
   *
   * @return array
   *   An array expected by \Drupal\Core\Render\RendererInterface::render().
   */
  public function revisionOverview(MediaInterface $media) {
    $account = $this
      ->currentUser();
    $langcode = $media
      ->language()
      ->getId();
    $langname = $media
      ->language()
      ->getName();
    $languages = $media
      ->getTranslationLanguages();
    $hasTranslations = count($languages) > 1;

    /** @var \Drupal\media\MediaStorage $mediaStorage */
    $mediaStorage = $this
      ->entityTypeManager()
      ->getStorage('media');
    $title = $this
      ->t('Revisions for %title', [
      '%title' => $media
        ->label(),
    ]);
    if ($hasTranslations) {
      $title = $this
        ->t('@langname revisions for %title', [
        '@langname' => $langname,
        '%title' => $media
          ->label(),
      ]);
    }
    $build['#title'] = $title;
    $header = [
      $this
        ->t('Revision'),
      $this
        ->t('Operations'),
    ];
    $type = $media
      ->bundle();
    $canRevert = $this
      ->accountHasRevertPermission($type, $account) && $media
      ->access('update');
    $canDelete = $this
      ->accountHasDeletePermission($type, $account) && $media
      ->access('delete');
    $rows = [];
    $defaultRevision = $media
      ->getRevisionId();
    $currentRevisionDisplayed = FALSE;
    foreach ($this
      ->getRevisionIds($media, $mediaStorage) as $vid) {

      /** @var \Drupal\media\MediaInterface $revision */
      $revision = $mediaStorage
        ->loadRevision($vid);
      if ($revision
        ->hasTranslation($langcode) && $revision
        ->getTranslation($langcode)
        ->isRevisionTranslationAffected()) {
        $username = [
          '#theme' => 'username',
          '#account' => $revision
            ->getRevisionUser(),
        ];
        $date = $this->dateFormatter
          ->format($revision
          ->getRevisionCreationTime(), 'short');
        $isCurrentRevision = $vid == $defaultRevision || !$currentRevisionDisplayed && $revision
          ->wasDefaultRevision();
        if (!$isCurrentRevision) {
          $link = Link::fromTextAndUrl($date, new Url('entity.media.revision', [
            'media' => $media
              ->id(),
            'media_revision' => $vid,
          ]))
            ->toString();
        }
        else {
          $link = $media
            ->toLink($date)
            ->toString();
          $currentRevisionDisplayed = TRUE;
        }
        $row = [];
        $column = [
          'data' => [
            '#type' => 'inline_template',
            '#template' => '{% trans %}{{ date }} by {{ username }}{% endtrans %}{% if message %}<p class="revision-log">{{ message }}</p>{% endif %}',
            '#context' => [
              'date' => $link,
              'username' => $this->renderer
                ->renderPlain($username),
              'message' => [
                '#markup' => $revision
                  ->getRevisionLogMessage(),
                '#allowed_tags' => Xss::getHtmlTagList(),
              ],
            ],
          ],
        ];
        $this->renderer
          ->addCacheableDependency($column['data'], $username);
        $row[] = $column;
        if ($isCurrentRevision) {
          $row[] = [
            'data' => [
              '#prefix' => '<em>',
              '#markup' => $this
                ->t('Current revision'),
              '#suffix' => '</em>',
            ],
          ];
          $rows[] = [
            'data' => $row,
            'class' => [
              'revision-current',
            ],
          ];
        }
        else {
          $links = [];
          if ($canRevert) {
            $revertLink = Url::fromRoute('entity.media.revision_revert_confirm', [
              'media' => $media
                ->id(),
              'media_revision' => $vid,
            ]);
            if ($hasTranslations) {
              $revertLink = Url::fromRoute('entity.media.revision_revert_translation_confirm', [
                'media' => $media
                  ->id(),
                'media_revision' => $vid,
                'langcode' => $langcode,
              ]);
            }
            $title = $this
              ->t('Set as current revision');
            if ($vid < $media
              ->getRevisionId()) {
              $title = $this
                ->t('Revert');
            }
            $links['revert'] = [
              'title' => $title,
              'url' => $revertLink,
            ];
          }
          if ($canDelete) {
            $links['delete'] = [
              'title' => $this
                ->t('Delete'),
              'url' => Url::fromRoute('entity.media.revision_delete_confirm', [
                'media' => $media
                  ->id(),
                'media_revision' => $vid,
              ]),
            ];
          }
          $row[] = [
            'data' => [
              '#type' => 'operations',
              '#links' => $links,
            ],
          ];
          $rows[] = $row;
        }
      }
    }
    $build['media_revisions_table'] = [
      '#theme' => 'table',
      '#rows' => $rows,
      '#header' => $header,
      '#attached' => [
        'library' => [
          'media_revisions_ui/media_revisions_ui.admin',
        ],
      ],
      '#attributes' => [
        'class' => 'media-revision-table',
      ],
    ];
    $build['pager'] = [
      '#type' => 'pager',
    ];
    return $build;
  }

  /**
   * Gets a list of media revision IDs for a given media.
   *
   * @param \Drupal\media\MediaInterface $media
   *   Media entity to search for revisions.
   * @param \Drupal\media\MediaStorage $mediaStorage
   *   Media storage to load revisions from.
   *
   * @return int[]
   *   Media revision IDs in descending order.
   */
  protected function getRevisionIds(MediaInterface $media, MediaStorage $mediaStorage) {
    $result = $mediaStorage
      ->getQuery()
      ->allRevisions()
      ->condition('mid', $media
      ->id())
      ->sort('vid', 'DESC')
      ->pager(50)
      ->execute();
    return array_keys($result);
  }

  /**
   * Checks if account can revert a given media type.
   *
   * @param string $mediaType
   *   Media type to check permission.
   * @param \Drupal\Core\Session\AccountInterface $account
   *   Account to check for permissions.
   *
   * @return bool
   *   TRUE if account can revert a given media type, otherwise FALSE.
   */
  protected function accountHasRevertPermission($mediaType, AccountInterface $account) {
    $hasRevertPermission = FALSE;
    $revertPermissions = [
      "revert {$mediaType} media revisions",
      'revert all media revisions',
      'administer media',
    ];
    foreach ($revertPermissions as $permission) {
      if ($account
        ->hasPermission($permission)) {
        $hasRevertPermission = TRUE;
        break;
      }
    }
    return $hasRevertPermission;
  }

  /**
   * Checks if account can delete a given media type.
   *
   * @param string $mediaType
   *   Media type to check permission.
   * @param \Drupal\Core\Session\AccountInterface $account
   *   Account to check for permissions.
   *
   * @return bool
   *   TRUE if account can delete a given media type, otherwise FALSE.
   */
  protected function accountHasDeletePermission($mediaType, AccountInterface $account) {
    $hasRevertPermission = FALSE;
    $revertPermissions = [
      "delete {$mediaType} media revisions",
      'delete all media revisions',
      'administer media',
    ];
    foreach ($revertPermissions as $permission) {
      if ($account
        ->hasPermission($permission)) {
        $hasRevertPermission = TRUE;
        break;
      }
    }
    return $hasRevertPermission;
  }

}

Classes

Name	Description
MediaRevisionController	Provides a list of media revisions for a given media.