<?php

namespace Drupal\hello_foo\Controller;

use Drupal\Core\Controller\ControllerBase;

/**
 * Displays the string "Hello Foo".
 */
class HelloFooController extends ControllerBase {

  /**
   * Retrieve data from the users table.
   *
   * @return array
   *   foo
   */
  private function getUsers($db) {
    return $db->query("SELECT * FROM {users}")->fetchAll();
  }
  /**
   * Display the markup.
   *
   * @return array
   *   Distributive array containing the data to render.
   */
  public function content() {
    //$rs = \Drupal::database()->query("SELECT * FROM {users}")->fetchAll();

    foreach ($this->getUsers(\Drupal::database()) as $record) {
      $user = $record->uid . ':' . $record->uuid;
      \Drupal::logger('hello_foo')->notice('processing ' . $user);
    }
    return [
      '#type' => 'markup',
      '#markup' => $this->t('Hello Foo!'),
    ];
  }

}