--- /dev/null
+<?php
+
+namespace Drupal\user;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\Sql\SqlContentEntityStorage;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Controller class for users.
+ *
+ * This extends the Drupal\Core\Entity\Sql\SqlContentEntityStorage class,
+ * adding required special handling for user objects.
+ */
+class UserStorage extends SqlContentEntityStorage implements UserStorageInterface {
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doSaveFieldItems(ContentEntityInterface $entity, array $names = []) {
+ // The anonymous user account is saved with the fixed user ID of 0.
+ // Therefore we need to check for NULL explicitly.
+ if ($entity->id() === NULL) {
+ $entity->uid->value = $this->database->nextId($this->database->query('SELECT MAX(uid) FROM {users}')->fetchField());
+ $entity->enforceIsNew();
+ }
+ return parent::doSaveFieldItems($entity, $names);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function isColumnSerial($table_name, $schema_name) {
+ // User storage does not use a serial column for the user id.
+ return $table_name == $this->revisionTable && $schema_name == $this->revisionKey;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function updateLastLoginTimestamp(UserInterface $account) {
+ $this->database->update('users_field_data')
+ ->fields(['login' => $account->getLastLoginTime()])
+ ->condition('uid', $account->id())
+ ->execute();
+ // Ensure that the entity cache is cleared.
+ $this->resetCache([$account->id()]);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function updateLastAccessTimestamp(AccountInterface $account, $timestamp) {
+ $this->database->update('users_field_data')
+ ->fields([
+ 'access' => $timestamp,
+ ])
+ ->condition('uid', $account->id())
+ ->execute();
+ // Ensure that the entity cache is cleared.
+ $this->resetCache([$account->id()]);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function deleteRoleReferences(array $rids) {
+ // Remove the role from all users.
+ $this->database->delete('user__roles')
+ ->condition('roles_target_id', $rids)
+ ->execute();
+
+ $this->resetCache();
+ }
+
+}