diff core/modules/content_moderation/src/Access/LatestRevisionCheck.php @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/content_moderation/src/Access/LatestRevisionCheck.php	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,99 @@
+<?php
+
+namespace Drupal\content_moderation\Access;
+
+use Drupal\Core\Access\AccessException;
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Routing\Access\AccessInterface;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\content_moderation\ModerationInformationInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\user\EntityOwnerInterface;
+use Symfony\Component\Routing\Route;
+
+/**
+ * Access check for the entity moderation tab.
+ */
+class LatestRevisionCheck implements AccessInterface {
+
+  /**
+   * The moderation information service.
+   *
+   * @var \Drupal\content_moderation\ModerationInformationInterface
+   */
+  protected $moderationInfo;
+
+  /**
+   * Constructs a new LatestRevisionCheck.
+   *
+   * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_information
+   *   The moderation information service.
+   */
+  public function __construct(ModerationInformationInterface $moderation_information) {
+    $this->moderationInfo = $moderation_information;
+  }
+
+  /**
+   * Checks that there is a pending revision available.
+   *
+   * This checker assumes the presence of an '_entity_access' requirement key
+   * in the same form as used by EntityAccessCheck.
+   *
+   * @param \Symfony\Component\Routing\Route $route
+   *   The route to check against.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The parametrized route.
+   * @param \Drupal\Core\Session\AccountInterface $account
+   *   The current user account.
+   *
+   * @return \Drupal\Core\Access\AccessResultInterface
+   *   The access result.
+   *
+   * @see \Drupal\Core\Entity\EntityAccessCheck
+   */
+  public function access(Route $route, RouteMatchInterface $route_match, AccountInterface $account) {
+    // This tab should not show up unless there's a reason to show it.
+    $entity = $this->loadEntity($route, $route_match);
+    if ($this->moderationInfo->hasPendingRevision($entity)) {
+      // Check the global permissions first.
+      $access_result = AccessResult::allowedIfHasPermissions($account, ['view latest version', 'view any unpublished content']);
+      if (!$access_result->isAllowed()) {
+        // Check entity owner access.
+        $owner_access = AccessResult::allowedIfHasPermissions($account, ['view latest version', 'view own unpublished content']);
+        $owner_access = $owner_access->andIf((AccessResult::allowedIf($entity instanceof EntityOwnerInterface && ($entity->getOwnerId() == $account->id()))));
+        $access_result = $access_result->orIf($owner_access);
+      }
+
+      return $access_result->addCacheableDependency($entity);
+    }
+
+    return AccessResult::forbidden()->addCacheableDependency($entity);
+  }
+
+  /**
+   * Returns the default revision of the entity this route is for.
+   *
+   * @param \Symfony\Component\Routing\Route $route
+   *   The route to check against.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The parametrized route.
+   *
+   * @return \Drupal\Core\Entity\ContentEntityInterface
+   *   returns the Entity in question.
+   *
+   * @throws \Drupal\Core\Access\AccessException
+   *   An AccessException is thrown if the entity couldn't be loaded.
+   */
+  protected function loadEntity(Route $route, RouteMatchInterface $route_match) {
+    $entity_type = $route->getOption('_content_moderation_entity_type');
+
+    if ($entity = $route_match->getParameter($entity_type)) {
+      if ($entity instanceof EntityInterface) {
+        return $entity;
+      }
+    }
+    throw new AccessException(sprintf('%s is not a valid entity route. The LatestRevisionCheck access checker may only be used with a route that has a single entity parameter.', $route_match->getRouteName()));
+  }
+
+}