group-8.x-1.x-dev/src/Plugin/EntityReferenceSelection/GroupTypeRoleSelection.php

<?php

namespace Drupal\group\Plugin\EntityReferenceSelection;

use Drupal\Core\Entity\Plugin\EntityReferenceSelection\DefaultSelection;
use Drupal\group\PermissionScopeInterface;

/**
 * Only shows the group roles which are available for a group type.
 *
 * The only handler setting is 'group_type_id', a required string that points
 * to the ID of the group type for which this handler will be run.
 *
 * @EntityReferenceSelection(
 *   id = "group_type:group_role",
 *   label = @Translation("Group type role selection"),
 *   entity_types = {"group_role"},
 *   group = "group_type",
 *   weight = 0
 * )
 */
class GroupTypeRoleSelection extends DefaultSelection {

  /**
   * {@inheritdoc}
   */
  protected function buildEntityQuery($match = NULL, $match_operator = 'CONTAINS') {
    $group_type_id = $this->configuration['group_type_id'];

    $query = parent::buildEntityQuery($match, $match_operator);
    $query->condition('group_type', $group_type_id, '=');
    $query->condition('scope', PermissionScopeInterface::INDIVIDUAL_ID, '=');

    return $query;
  }

}