class Shortcut

class Shortcut extends ContentEntityBase implements ShortcutInterface {

  /**
   * {@inheritdoc}
   */
  public function getTitle() {
    return $this
      ->get('title')->value;
  }

  /**
   * {@inheritdoc}
   */
  public function setTitle($link_title) {
    $this
      ->set('title', $link_title);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function getWeight() {
    return $this
      ->get('weight')->value;
  }

  /**
   * {@inheritdoc}
   */
  public function setWeight($weight) {
    $this
      ->set('weight', $weight);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function getUrl() {
    return $this->link
      ->first()
      ->getUrl();
  }

  /**
   * {@inheritdoc}
   */
  public function postSave(EntityStorageInterface $storage, $update = TRUE) {
    parent::postSave($storage, $update);

    // Entity::postSave() calls Entity::invalidateTagsOnSave(), which only
    // handles the regular cases. The Shortcut entity has one special case: a
    // newly created shortcut is *also* added to a shortcut set, so we must
    // invalidate the associated shortcut set's cache tag.
    if (!$update) {
      Cache::invalidateTags($this
        ->getCacheTagsToInvalidate());
    }
  }

  /**
   * {@inheritdoc}
   */
  public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {

    /** @var \Drupal\Core\Field\BaseFieldDefinition[] $fields */
    $fields = parent::baseFieldDefinitions($entity_type);
    $fields['id']
      ->setDescription(t('The ID of the shortcut.'));
    $fields['uuid']
      ->setDescription(t('The UUID of the shortcut.'));
    $fields['shortcut_set']
      ->setLabel(t('Shortcut set'))
      ->setDescription(t('The bundle of the shortcut.'));
    $fields['langcode']
      ->setDescription(t('The language code of the shortcut.'));
    $fields['title'] = BaseFieldDefinition::create('string')
      ->setLabel(t('Name'))
      ->setDescription(t('The name of the shortcut.'))
      ->setRequired(TRUE)
      ->setTranslatable(TRUE)
      ->setSetting('max_length', 255)
      ->setDisplayOptions('form', [
      'type' => 'string_textfield',
      'weight' => -10,
      'settings' => [
        'size' => 40,
      ],
    ]);
    $fields['weight'] = BaseFieldDefinition::create('integer')
      ->setLabel(t('Weight'))
      ->setDescription(t('Weight among shortcuts in the same shortcut set.'));
    $fields['link'] = BaseFieldDefinition::create('link')
      ->setLabel(t('Path'))
      ->setDescription(t('The location this shortcut points to.'))
      ->setRequired(TRUE)
      ->setSettings([
      'link_type' => LinkItemInterface::LINK_INTERNAL,
      'title' => DRUPAL_DISABLED,
    ])
      ->setDisplayOptions('form', [
      'type' => 'link_default',
      'weight' => 0,
    ])
      ->setDisplayConfigurable('form', TRUE);
    return $fields;
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheTagsToInvalidate() {
    return $this->shortcut_set->entity
      ->getCacheTags();
  }

  /**
   * Sort shortcut objects.
   *
   * Callback for uasort().
   *
   * @param \Drupal\shortcut\ShortcutInterface $a
   *   First item for comparison.
   * @param \Drupal\shortcut\ShortcutInterface $b
   *   Second item for comparison.
   *
   * @return int
   *   The comparison result for uasort().
   */
  public static function sort(ShortcutInterface $a, ShortcutInterface $b) {
    $a_weight = $a
      ->getWeight();
    $b_weight = $b
      ->getWeight();
    if ($a_weight == $b_weight) {
      return strnatcasecmp($a
        ->getTitle(), $b
        ->getTitle());
    }
    return $a_weight <=> $b_weight;
  }

}