License Agreement Modal Block

LicenseModalBlock.php

<?php

namespace Drupal\license_modal\Plugin\Block;

use Drupal\license_modal\Form\AcceptLicenseForm;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a block to display the license agrement.
 *
 * @Block(
 *   id = "license_modal_block",
 *   admin_label = @Translation("License Modal Block"),
 * )
 */
class LicenseModalBlock extends BlockBase implements ContainerFactoryPluginInterface {

  protected $currentUser;
  protected $nodeStorage;
  protected $userStorage;

  /**
   * Constructs a \Drupal\views\Plugin\Block\ViewsBlockBase object.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Entity\EntityStorageInterface $nodeStorage
   *   The nodes storage.
   * @param \Drupal\Core\Entity\EntityStorageInterface $nodeStorage
   *   The users storage.
   * @param \Drupal\Core\Session\AccountInterface $user
   *   The current user.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityStorageInterface $nodeStorage, EntityStorageInterface $userStorage, AccountInterface $user) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->currentUser = $user;
    $this->nodeStorage = $nodeStorage;
    $this->userStorage = $userStorage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration, $plugin_id, $plugin_definition,
      $container->get('entity_type.manager')->getStorage('node'),
      $container->get('entity_type.manager')->getStorage('user'),
      $container->get('current_user')
    );
  }

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

    $config = $this->getConfiguration();
    $node = NULL;
    if (isset($config['license_node'])) {
      $node = $this->nodeStorage->load($config['license_node']);
    }

    $form['license_node'] = [
      '#type' => 'entity_autocomplete',
      '#title' => t('License Agreement Page'),
      '#target_type' => 'node',
      '#required' => TRUE,
      '#default_value' => $node,
      '#selection_settings' => [
        'target_bundles' => ['page'],
      ],
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function blockSubmit($form, FormStateInterface $form_state) {
    parent::blockSubmit($form, $form_state);
    $values = $form_state->getValues();
    $this->configuration['license_node'] = $values['license_node'];
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    $build = [];

    if (!$this->currentUser->isAnonymous()) {
      $account = $this->userStorage->load($this->currentUser->id());
      if ($account->get('field_date_accepted_license')->isEmpty()) {
        $config = $this->getConfiguration();
        $node = isset($config['license_node'])
          ? $this->nodeStorage->load($config['license_node'])
          : NULL;
        $form = \Drupal::formBuilder()->getForm(AcceptLicenseForm::class);
        $build = [
          '#theme' => 'license_modal',
          '#node' => $node,
          '#form' => $form,
          "#attached" => [
            'library' => 'license_modal/modal',
          ],
        ];
      }
    }

    return $build;
  }

}