cloud-8.x-2.0-beta1/modules/cloud_service_providers/aws_cloud/src/Plugin/Block/DisassociatedSnapshotsBlock.php

<?php

namespace Drupal\aws_cloud\Plugin\Block;

use Drupal\Core\Block\BlockBase;
use Drupal\Core\Config\ConfigFactoryInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a block displaying unused snapshots.
 *
 * @Block(
 *   id = "aws_cloud_disassociated_snapshots_block",
 *   admin_label = @Translation("Disassociated Snapshots"),
 *   category = @Translation("AWS Cloud")
 * )
 */
class DisassociatedSnapshotsBlock extends BlockBase implements ContainerFactoryPluginInterface {

  use StringTranslationTrait;

  /**
   * Stores the configuration factory.
   *
   * @var \Drupal\Core\Config\ConfigFactoryInterface
   */
  protected $configFactory;

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $currentUser;

  /**
   * Creates a ResourcesBlock instance.
   *
   * @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\Config\ConfigFactoryInterface $config_factory
   *   The factory for configuration objects.
   * @param \Drupal\Core\Session\AccountInterface $current_user
   *   The current user.
   */
  public function __construct(
    array $configuration,
    $plugin_id,
    $plugin_definition,
    ConfigFactoryInterface $config_factory,
    AccountInterface $current_user
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->configFactory = $config_factory;
    $this->currentUser = $current_user;
  }

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

  /**
   * {@inheritdoc}
   */
  public function build() {
    return $this->buildSnapshotList();
  }

  /**
   * Build a list of unused snapshots.
   *
   * @return array
   *   A set of render arrays.
   */
  private function buildSnapshotList() {
    $build = [];
    $snapshots = $this->getDisassociatedSnapshots();
    if (count($snapshots)) {
      $urls = [];
      /* @var \Drupal\aws_cloud\Entity\Ec2\Snapshot $snapshot */
      foreach ($snapshots as $snapshot) {
        $urls[] = $snapshot->toLink($snapshot->getName());
      }
      $build[] = [
        '#markup' => $this->t('The following snapshots are not associated with a volume'),
      ];
      $build[] = [
        '#theme' => 'item_list',
        '#items' => $urls,
      ];
    }
    else {
      $build = [
        '#markup' => $this->t('Great job! You have no disassociated snapshots.'),
      ];
    }
    return $build;
  }

  /**
   * Get a list of disassociated snapshots.
   *
   * @return array
   *   Array of disassociated snapshots.
   */
  private function getDisassociatedSnapshots() {
    $snapshots = aws_cloud_get_unused_snapshots();
    if (!$this->currentUser->hasPermission('view any aws cloud snapshot')) {
      /* @var \Drupal\aws_cloud\Entity\Ec2\Snapshot $snapshot */
      foreach ($snapshots as $key => $snapshot) {
        // Only return volumes the user has access to.
        if ($snapshot->getOwnerId() !== $this->currentUser->id()) {
          unset($snapshots[$key]);
        }
      }
    }
    return $snapshots;
  }

}