<?php

namespace Drupal\entity\Controller;

use Drupal\Component\Utility\Xss;
use Drupal\Core\Access\AccessResult;
use Drupal\Core\Controller\ControllerBase;
use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Render\RendererInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Entity\RevisionLogInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a controller which shows the revision history.
 *
 * This controller leverages the revision controller trait, which is agnostic to
 * any entity type, by using \Drupal\Core\Entity\RevisionLogInterface.
 */
class RevisionOverviewController extends ControllerBase {

  use RevisionControllerTrait;

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

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

  /**
   * Creates a new RevisionOverviewController instance.
   *
   * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
   *   The date formatter.
   */
  public function __construct(DateFormatterInterface $date_formatter, RendererInterface $renderer) {
    $this->dateFormatter = $date_formatter;
    $this->renderer = $renderer;
  }

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

  /**
   * {@inheritdoc}
   */
  protected function hasDeleteRevisionAccess(EntityInterface $entity) {
    return $this->currentUser()->hasPermission("delete all {$entity->id()} revisions");
  }

  /**
   * {@inheritdoc}
   */
  protected function buildRevertRevisionLink(EntityInterface $entity_revision) {
    if ($entity_revision->hasLinkTemplate('revision-revert-form')) {
      return [
        'title' => t('Revert'),
        'url' => $entity_revision->toUrl('revision-revert-form'),
      ];
    }
  }

  /**
   * {@inheritdoc}
   */
  protected function buildDeleteRevisionLink(EntityInterface $entity_revision) {
    if ($entity_revision->hasLinkTemplate('revision-delete-form')) {
      return [
        'title' => t('Delete'),
        'url' => $entity_revision->toUrl('revision-delete-form'),
      ];
    }
  }

  /**
   * Generates an overview table of older revisions of an entity.
   *
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   *
   * @return array
   *   A render array.
   */
  public function revisionOverviewController(RouteMatchInterface $route_match) {
    return $this->revisionOverview($route_match->getParameter($route_match->getRouteObject()->getOption('entity_type_id')));
  }

  /**
   * {@inheritdoc}
   */
  protected function getRevisionDescription(ContentEntityInterface $revision, $is_default = FALSE) {
    /** @var \Drupal\Core\Entity\ContentEntityInterface|\Drupal\user\EntityOwnerInterface|\Drupal\Core\Entity\RevisionLogInterface $revision */
    if ($revision instanceof RevisionLogInterface) {
      // Use revision link to link to revisions that are not active.
      $date = $this->dateFormatter->format($revision->getRevisionCreationTime(), 'short');
      $link = $revision->toLink($date, 'revision');

      // @todo: Simplify this when https://www.drupal.org/node/2334319 lands.
      $username = [
        '#theme' => 'username',
        '#account' => $revision->getRevisionUser(),
      ];
      $username = $this->renderer->render($username);
    }
    else {
      $link = $revision->toLink($revision->label(), 'revision');
      $username = '';

    }

    $markup = '';
    if ($revision instanceof RevisionLogInterface) {
      $markup = $revision->getRevisionLogMessage();
    }

    if ($username) {
      $template = '{% trans %}{{ date }} by {{ username }}{% endtrans %}{% if message %}<p class="revision-log">{{ message }}</p>{% endif %}';
    }
    else {
      $template = '{% trans %} {{ date }} {% endtrans %}{% if message %}<p class="revision-log">{{ message }}</p>{% endif %}';
    }

    $column = [
      'data' => [
        '#type' => 'inline_template',
        '#template' => $template,
        '#context' => [
          'date' => $link->toString(),
          'username' => $username,
          'message' => ['#markup' => $markup, '#allowed_tags' => Xss::getHtmlTagList()],
        ],
      ],
    ];
    return $column;
  }

  /**
   * {@inheritdoc}
   */
  protected function hasRevertRevisionAccess(EntityInterface $entity) {
    return AccessResult::allowedIfHasPermission($this->currentUser(), "revert all {$entity->getEntityTypeId()} revisions")->orIf(
      AccessResult::allowedIfHasPermission($this->currentUser(), "revert {$entity->bundle()} {$entity->getEntityTypeId()} revisions")
    );
  }

}
