TestSessionBag.php

<?php

namespace Drupal\session_test\Session;

use Symfony\Component\HttpFoundation\Session\SessionBagInterface;

/**
 * Test session container.
 */
class TestSessionBag implements SessionBagInterface {

  /**
   * The bag name.
   */
  const BAG_NAME = 'session_test';

  /**
   * Key used when persisting the session.
   *
   * @var string
   */
  protected $storageKey;

  /**
   * Storage for data to save.
   *
   * @var array
   */
  protected $attributes = [];

  /**
   * Constructs a new TestSessionBag object.
   *
   * @param string $storage_key
   *   The key used to store test attributes.
   */
  public function __construct($storage_key = '_dp_session_test') {
    $this->storageKey = $storage_key;
  }

  /**
   * Sets the test flag.
   */
  public function setFlag() {
    $this->attributes['test_flag'] = TRUE;
  }

  /**
   * Returns TRUE if the test flag is set.
   *
   * @return bool
   *   TRUE when flag is set, FALSE otherwise.
   */
  public function hasFlag() {
    return !empty($this->attributes['test_flag']);
  }

  /**
   * Clears the test flag.
   */
  public function clearFlag() {
    unset($this->attributes['test_flag']);
  }

  /**
   * {@inheritdoc}
   */
  public function getName() : string {
    return self::BAG_NAME;
  }

  /**
   * {@inheritdoc}
   */
  public function initialize(array &$attributes) {
    $this->attributes =& $attributes;
  }

  /**
   * {@inheritdoc}
   */
  public function getStorageKey() : string {
    return $this->storageKey;
  }

  /**
   * {@inheritdoc}
   */
  public function clear() : mixed {
    $return = $this->attributes;
    $this->attributes = [];
    return $return;
  }

}