class LocalTaskForm

class LocalTaskForm extends ContentEntityForm {

  /**
   * The local task.
   *
   * @var \Drupal\tmgmt_local\LocalTaskInterface
   */
  protected $entity;

  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $form = parent::form($form, $form_state);

    /** @var LocalTask $local_task */
    $local_task = $this->entity;
    $states = LocalTask::getStatuses();

    // Set the title of the page to the label and the current state of the
    // localTask.
    $form['#title'] = t('@title (@source to @target, @state)', array(
      '@title' => $local_task
        ->label(),
      '@source' => $local_task
        ->getJob()
        ->getSourceLanguage()
        ->getName(),
      '@target' => $local_task
        ->getJob()
        ->getTargetLanguage()
        ->getName(),
      '@state' => $states[$local_task
        ->getStatus()],
    ));
    $assignees = tmgmt_local_assignees($local_task
      ->getJob()
      ->getSourceLangcode(), array(
      $local_task
        ->getJob()
        ->getTargetLangcode(),
    ));
    $form['tuid'] = array(
      '#title' => t('Assigned'),
      '#type' => 'select',
      '#options' => $assignees,
      '#empty_option' => t('- Unassigned -'),
      '#default_value' => $local_task
        ->getAssignee() ? $local_task
        ->getAssignee()
        ->id() : NULL,
      '#access' => \Drupal::currentUser()
        ->hasPermission('administer tmgmt') || \Drupal::currentUser()
        ->hasPermission('administer translation tasks'),
    );
    $form['info'] = array(
      '#type' => 'container',
      '#attributes' => array(
        'class' => array(
          'tmgmt-local-task-info',
          'clearfix',
        ),
      ),
      '#weight' => 0,
      '#tree' => TRUE,
    );

    // Check for label value and set for dynamically change.
    if ($form_state
      ->getValue('label') && $form_state
      ->getValue('label') == $local_task
      ->label()) {
      $form_state
        ->setValue('label', $local_task
        ->label());
    }
    $form['title']['widget'][0]['value']['#description'] = t('You can provide a label for this localTask in order to identify it easily later on. Or leave it empty to use the default one.');
    $form['title']['#group'] = 'info';
    $form['title']['#prefix'] = '<div id="tmgmt-ui-label">';
    $form['title']['#suffix'] = '</div>';
    $form['info']['source_language'] = array(
      '#title' => t('Source language'),
      '#type' => 'item',
      '#markup' => $local_task
        ->getJob()
        ->getSourceLanguage()
        ->getName(),
      '#prefix' => '<div id="tmgmt-ui-source-language" class="tmgmt-ui-source-language tmgmt-ui-info-item">',
      '#suffix' => '</div>',
      '#value' => $local_task
        ->getJob()
        ->getSourceLangcode(),
    );
    $form['info']['target_language'] = array(
      '#title' => t('Target language'),
      '#type' => 'item',
      '#markup' => $local_task
        ->getJob()
        ->getTargetLanguage()
        ->getName(),
      '#prefix' => '<div id="tmgmt-ui-target-language" class="tmgmt-ui-target-language tmgmt-ui-info-item">',
      '#suffix' => '</div>',
      '#value' => $local_task
        ->getJob()
        ->getTargetLangcode(),
    );
    $form['info']['word_count'] = array(
      '#type' => 'item',
      '#title' => t('Total word count'),
      '#markup' => number_format($local_task
        ->getWordCount()),
      '#prefix' => '<div class="tmgmt-ui-word-count tmgmt-ui-info-item">',
      '#suffix' => '</div>',
    );

    // Display created time only for localTasks that are not new anymore.
    if (!$local_task
      ->getJob()
      ->isUnprocessed()) {
      $form['info']['created'] = array(
        '#type' => 'item',
        '#title' => t('Created'),
        '#markup' => \Drupal::service('date.formatter')
          ->format($local_task
          ->getJob()
          ->getCreatedTime()),
        '#prefix' => '<div class="tmgmt-ui-created tmgmt-ui-info-item">',
        '#suffix' => '</div>',
        '#value' => $local_task
          ->getJob()
          ->getCreatedTime(),
      );
    }
    $form['info']['status'] = array(
      '#type' => 'item',
      '#title' => t('Status'),
      '#markup' => $states[$local_task
        ->getStatus()],
      '#prefix' => '<div class="tmgmt-local-ui-status tmgmt-ui-info-item">',
      '#suffix' => '</div>',
    );
    if ($view = Views::getView('tmgmt_local_task_items')) {
      $block = $view
        ->preview('block_1', [
        $local_task
          ->id(),
      ]);
      $form['items'] = array(
        '#type' => 'item',
        '#title' => $view
          ->getTitle(),
        '#prefix' => '<div class="tmgmt-local-task-items">',
        '#markup' => \Drupal::service('renderer')
          ->render($block),
        '#attributes' => array(
          'class' => array(
            'tmgmt-local-task-items',
          ),
        ),
        '#suffix' => '</div>',
        '#weight' => 10,
      );
    }
    $form['footer'] = tmgmt_color_legend_local_task_item();
    $form['footer']['#weight'] = 100;
    $form['#attached']['library'][] = 'tmgmt/admin';
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions = parent::actions($form, $form_state);
    $actions['submit']['#value'] = $this
      ->t('Save task');
    $actions['submit']['#access'] = \Drupal::currentUser()
      ->hasPermission('administer tmgmt') || \Drupal::currentUser()
      ->hasPermission('administer translation tasks');
    return $actions;
  }

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {

    /** @var \Drupal\tmgmt_local\Entity\LocalTask $task */
    $task = $this
      ->getEntity();
    if (!empty($form_state
      ->getValue('tuid'))) {

      /** @var User $assignee */
      $assignee = User::load($form_state
        ->getValue('tuid'));
      $task
        ->assign($assignee);
      $this
        ->messenger()
        ->addStatus(t('Assigned to user @assignee_name.', [
        '@assignee_name' => $assignee
          ->getAccountName(),
      ]));
    }
    else {
      $task
        ->setStatus(LocalTaskInterface::STATUS_UNASSIGNED);
      $this
        ->messenger()
        ->addStatus(t('Unassigned from translation local task @label.', array(
        '@label' => $task
          ->label(),
      )));
    }
    $this->entity
      ->save();
    $view = Views::getView('tmgmt_local_task_overview');
    $view
      ->initDisplay();
    $form_state
      ->setRedirect($view
      ->getUrl()
      ->getRouteName());
  }

  /**
   * {@inheritdoc}
   */
  public function delete(array $form, FormStateInterface $form_state) {
    $form_state
      ->setRedirectUrl($this->entity
      ->toUrl('delete-form'));
  }

}