--- /dev/null
+<?php
+
+namespace Drupal\content_translation\Access;
+
+use Drupal\content_translation\ContentTranslationManager;
+use Drupal\content_translation\ContentTranslationManagerInterface;
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Routing\Access\AccessInterface;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\language\Entity\ContentLanguageSettings;
+use Drupal\workflows\Entity\Workflow;
+
+/**
+ * Access check for entity translation deletion.
+ *
+ * @internal This additional access checker only aims to prevent deletions in
+ * pending revisions until we are able to flag revision translations as
+ * deleted.
+ *
+ * @todo Remove this in https://www.drupal.org/node/2945956.
+ */
+class ContentTranslationDeleteAccess implements AccessInterface {
+
+ /**
+ * The entity type manager.
+ *
+ * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+ */
+ protected $entityTypeManager;
+
+ /**
+ * The content translation manager.
+ *
+ * @var \Drupal\content_translation\ContentTranslationManagerInterface
+ */
+ protected $contentTranslationManager;
+
+ /**
+ * Constructs a ContentTranslationDeleteAccess object.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeManagerInterface $manager
+ * The entity type manager.
+ * @param \Drupal\content_translation\ContentTranslationManagerInterface $content_translation_manager
+ * The content translation manager.
+ */
+ public function __construct(EntityTypeManagerInterface $manager, ContentTranslationManagerInterface $content_translation_manager) {
+ $this->entityTypeManager = $manager;
+ $this->contentTranslationManager = $content_translation_manager;
+ }
+
+ /**
+ * Checks access to translation deletion for the specified route match.
+ *
+ * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+ * The parameterized route.
+ * @param \Drupal\Core\Session\AccountInterface $account
+ * The currently logged in account.
+ *
+ * @return \Drupal\Core\Access\AccessResultInterface
+ * The access result.
+ */
+ public function access(RouteMatchInterface $route_match, AccountInterface $account) {
+ $requirement = $route_match->getRouteObject()->getRequirement('_access_content_translation_delete');
+ $entity_type_id = current(explode('.', $requirement));
+ $entity = $route_match->getParameter($entity_type_id);
+ return $this->checkAccess($entity);
+ }
+
+ /**
+ * Checks access to translation deletion for the specified entity.
+ *
+ * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+ * The entity translation to be deleted.
+ *
+ * @return \Drupal\Core\Access\AccessResultInterface
+ * The access result.
+ */
+ public function checkAccess(ContentEntityInterface $entity) {
+ $result = AccessResult::allowed();
+
+ $entity_type_id = $entity->getEntityTypeId();
+ $result->addCacheableDependency($entity);
+ // Add the cache dependencies used by
+ // ContentTranslationManager::isPendingRevisionSupportEnabled().
+ if (\Drupal::moduleHandler()->moduleExists('content_moderation')) {
+ foreach (Workflow::loadMultipleByType('content_moderation') as $workflow) {
+ $result->addCacheableDependency($workflow);
+ }
+ }
+ if (!ContentTranslationManager::isPendingRevisionSupportEnabled($entity_type_id, $entity->bundle())) {
+ return $result;
+ }
+
+ if ($entity->isDefaultTranslation()) {
+ return $result;
+ }
+
+ $config = ContentLanguageSettings::load($entity_type_id . '.' . $entity->bundle());
+ $result->addCacheableDependency($config);
+ if (!$this->contentTranslationManager->isEnabled($entity_type_id, $entity->bundle())) {
+ return $result;
+ }
+
+ /** @var \Drupal\Core\Entity\ContentEntityStorageInterface $storage */
+ $storage = $this->entityTypeManager->getStorage($entity_type_id);
+ $revision_id = $storage->getLatestTranslationAffectedRevisionId($entity->id(), $entity->language()->getId());
+ if (!$revision_id) {
+ return $result;
+ }
+
+ /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
+ $revision = $storage->loadRevision($revision_id);
+ if ($revision->wasDefaultRevision()) {
+ return $result;
+ }
+
+ $result = $result->andIf(AccessResult::forbidden());
+ return $result;
+ }
+
+}