--- /dev/null
+<?php
+
+namespace Drupal\user\Plugin\views\field;
+
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\views\Plugin\views\field\FieldPluginBase;
+use Drupal\views\ResultRow;
+use Drupal\user\UserDataInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides access to the user data service.
+ *
+ * @ingroup views_field_handlers
+ *
+ * @see \Drupal\user\UserDataInterface
+ *
+ * @ViewsField("user_data")
+ */
+class UserData extends FieldPluginBase {
+
+ /**
+ * Provides the user data service object.
+ *
+ * @var \Drupal\user\UserDataInterface
+ */
+ protected $userData;
+
+ /**
+ * The module handler.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+ return new static($configuration, $plugin_id, $plugin_definition, $container->get('user.data'), $container->get('module_handler'));
+ }
+
+ /**
+ * Constructs a UserData object.
+ */
+ public function __construct(array $configuration, $plugin_id, $plugin_definition, UserDataInterface $user_data, ModuleHandlerInterface $module_handler) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+ $this->userData = $user_data;
+ $this->moduleHandler = $module_handler;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function defineOptions() {
+ $options = parent::defineOptions();
+
+ $options['data_module'] = ['default' => ''];
+ $options['data_name'] = ['default' => ''];
+
+ return $options;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
+ parent::buildOptionsForm($form, $form_state);
+
+ $modules = $this->moduleHandler->getModuleList();
+ $names = [];
+ foreach (array_keys($modules) as $name) {
+ $names[$name] = $this->moduleHandler->getName($name);
+ }
+
+ $form['data_module'] = [
+ '#title' => $this->t('Module name'),
+ '#type' => 'select',
+ '#description' => $this->t('The module which sets this user data.'),
+ '#default_value' => $this->options['data_module'],
+ '#options' => $names,
+ ];
+
+ $form['data_name'] = [
+ '#title' => $this->t('Name'),
+ '#type' => 'textfield',
+ '#description' => $this->t('The name of the data key.'),
+ '#default_value' => $this->options['data_name'],
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function render(ResultRow $values) {
+ $uid = $this->getValue($values);
+ $data = $this->userData->get($this->options['data_module'], $uid, $this->options['data_name']);
+
+ // Don't sanitize if no value was found.
+ if (isset($data)) {
+ return $this->sanitizeValue($data);
+ }
+ }
+
+}