getFormOptions example

        $this->fail(t('Failed to connect to your database server. The server reports the following message: %error.<ul><li>Is the database server running?</li><li>Does the database exist or does the database user have sufficient privileges to create the database?</li><li>Have you entered the correct database name?</li><li>Have you entered the correct username and password?</li><li>Have you entered the correct database hostname and port number?</li></ul>', ['%error' => $e->getMessage()]));
        return FALSE;
      }
    }
    return TRUE;
  }

  /** * {@inheritdoc} */
  public function getFormOptions(array $database) {
    $form = parent::getFormOptions($database);
    if (empty($form['advanced_options']['port']['#default_value'])) {
      $form['advanced_options']['port']['#default_value'] = '3306';
    }
    $form['advanced_options']['isolation_level'] = [
      '#type' => 'select',
      '#title' => $this->t('Transaction isolation level'),
      '#options' => [
        'READ COMMITTED' => $this->t('READ COMMITTED'),
        'REPEATABLE READ' => $this->t('REPEATABLE READ'),
        '' => $this->t('Use database default'),
      ],
      

$this->sourceDatabase->update('variable')
      ->fields(['value' => serialize($file_temporary_path)])
      ->condition('name', 'file_temporary_path')
      ->execute();

    $connection_options = $this->sourceDatabase->getConnectionOptions();
    $driver = $connection_options['driver'];

    // Use the driver connection form to get the correct options out of the     // database settings. This supports all of the databases we test against.     $drivers = drupal_get_database_types();
    $form = $drivers[$driver]->getFormOptions($connection_options);
    $connection_options = array_intersect_key($connection_options, $form + $form['advanced_options']);
    // Remove isolation_level since that option is not configurable in the UI.     unset($connection_options['isolation_level']);
    $edit = [
      $driver => $connection_options,
      'version' => '7',
    ];
    if (count($drivers) !== 1) {
      $edit['driver'] = $driver;
    }
    // Set the public and private base paths for the Credential Form.

/** * {@inheritdoc} */
  public function minimumVersion() {
    return static::SQLITE_MINIMUM_VERSION;
  }

  /** * {@inheritdoc} */
  public function getFormOptions(array $database) {
    $form = parent::getFormOptions($database);

    // Remove the options that only apply to client/server style databases.     unset($form['username'], $form['password'], $form['advanced_options']['host'], $form['advanced_options']['port']);

    // Make the text more accurate for SQLite.     $form['database']['#title'] = t('Database file');
    $form['database']['#description'] = t('The absolute path to the file where @drupal data will be stored. This must be writable by the web server and should exist outside of the web root.', ['@drupal' => drupal_install_profile_distribution_name()]);
    $default_database = \Drupal::getContainer()->getParameter('site.path') . '/files/.ht.sqlite';
    $form['database']['#default_value'] = empty($database['database']) ? $default_database : $database['database'];
    return $form;
  }

  

      ],
    ];
    if (count($drivers) == 1) {
      $form['database']['driver']['#disabled'] = TRUE;
    }

    // Add driver-specific configuration options.     foreach ($drivers as $key => $driver) {
      $form['database']['driver']['#options'][$key] = $driver->name();

      $form['database']['settings'][$key] = $driver->getFormOptions($default_options);
      unset($form['database']['settings'][$key]['advanced_options']['prefix']['#description']);

      // This is a multi-step form and is not rebuilt during submission so       // #limit_validation_errors is not used. The database and username fields       // for mysql and pgsql must not be required.       $form['database']['settings'][$key]['database']['#required'] = FALSE;
      $form['database']['settings'][$key]['username']['#required'] = FALSE;
      $form['database']['settings'][$key]['database']['#states'] = [
        'required' => [
          ':input[name=source_connection]' => ['value' => ''],
          ':input[name=driver]' => ['value' => $key],
        ],

  protected function getCredentials() {
    $connection_options = $this->sourceDatabase->getConnectionOptions();
    $version = $this->getLegacyDrupalVersion($this->sourceDatabase);
    $driver = $connection_options['driver'];

    // Use the driver connection form to get the correct options out of the     // database settings. This supports all of the databases we test against.     $drivers = drupal_get_database_types();
    $form = $drivers[$driver]->getFormOptions($connection_options);
    $connection_options = array_intersect_key($connection_options, $form + $form['advanced_options']);
    // Remove isolation_level since that option is not configurable in the UI.     unset($connection_options['isolation_level']);
    $edit = [
      $driver => $connection_options,
      'source_private_file_path' => $this->getSourceBasePath(),
      'version' => $version,
    ];
    if ($version == 6) {
      $edit['d6_source_base_path'] = $this->getSourceBasePath();
    }
    

$this->pass(t('PostgreSQL has initialized itself.'));
    }
    catch (\Exception $e) {
      $this->fail(t('Drupal could not be correctly setup with the existing database due to the following error: @error.', ['@error' => $e->getMessage()]));
    }
  }

  /** * {@inheritdoc} */
  public function getFormOptions(array $database) {
    $form = parent::getFormOptions($database);
    if (empty($form['advanced_options']['port']['#default_value'])) {
      $form['advanced_options']['port']['#default_value'] = '5432';
    }
    return $form;
  }

}

'#required' => TRUE,
      '#default_value' => $default_driver,
    ];
    if (count($drivers) == 1) {
      $form['driver']['#disabled'] = TRUE;
    }

    // Add driver specific configuration options.     foreach ($drivers as $key => $driver) {
      $form['driver']['#options'][$key] = $driver->name();

      $form['settings'][$key] = $driver->getFormOptions($default_options);
      $form['settings'][$key]['#prefix'] = '<h2 class="js-hide">' . $this->t('@driver_name settings', ['@driver_name' => $driver->name()]) . '</h2>';
      $form['settings'][$key]['#type'] = 'container';
      $form['settings'][$key]['#tree'] = TRUE;
      $form['settings'][$key]['advanced_options']['#parents'] = [$key];
      $form['settings'][$key]['#states'] = [
        'visible' => [
          ':input[name=driver]' => ['value' => $key],
        ],
      ];
    }