public function GroupContentCardinalityValidator::validate in Group 8

Same name and namespace in other branches

1. 2.0.x src/Plugin/Validation/Constraint/GroupContentCardinalityValidator.php \Drupal\group\Plugin\Validation\Constraint\GroupContentCardinalityValidator::validate()

File

src/Plugin/Validation/Constraint/GroupContentCardinalityValidator.php, line 52

Class

GroupContentCardinalityValidator

Checks the amount of times a single content entity can be added to a group.

Namespace

Drupal\group\Plugin\Validation\Constraint

Code

public function validate($group_content, Constraint $constraint) {

  /** @var \Drupal\group\Entity\GroupContentInterface $group_content */

  /** @var \Drupal\group\Plugin\Validation\Constraint\GroupContentCardinality $constraint */
  if (!isset($group_content)) {
    return;
  }

  // Only run our checks if a group was referenced.
  if (!($group = $group_content
    ->getGroup())) {
    return;
  }

  // Only run our checks if an entity was referenced.
  if (!($entity = $group_content
    ->getEntity())) {
    return;
  }

  // Get the plugin for the group content entity.
  $plugin = $group_content
    ->getContentPlugin();

  // Get the cardinality settings from the plugin.
  $group_cardinality = $plugin
    ->getGroupCardinality();
  $entity_cardinality = $plugin
    ->getEntityCardinality();

  // Exit early if both cardinalities are set to unlimited.
  if ($group_cardinality <= 0 && $entity_cardinality <= 0) {
    return;
  }

  // Get the entity_id field label for error messages.
  $field_name = $group_content
    ->getFieldDefinition('entity_id')
    ->getLabel();

  // Enforce the group cardinality if it's not set to unlimited.
  if ($group_cardinality > 0) {

    // Get the group content entities for this piece of content.
    $properties = [
      'type' => $plugin
        ->getContentTypeConfigId(),
      'entity_id' => $entity
        ->id(),
    ];
    $group_instances = $this->entityTypeManager
      ->getStorage('group_content')
      ->loadByProperties($properties);

    // Get the groups this content entity already belongs to, not counting
    // the current group towards the limit.
    $group_ids = [];
    foreach ($group_instances as $instance) {

      /** @var \Drupal\group\Entity\GroupContentInterface $instance */
      if ($instance
        ->getGroup()
        ->id() != $group
        ->id()) {
        $group_ids[] = $instance
          ->getGroup()
          ->id();
      }
    }
    $group_count = count(array_unique($group_ids));

    // Raise a violation if the content has reached the cardinality limit.
    if ($group_count >= $group_cardinality) {
      $this->context
        ->buildViolation($constraint->groupMessage)
        ->setParameter('@field', $field_name)
        ->setParameter('%content', $entity
        ->label())
        ->atPath('entity_id.0')
        ->addViolation();
    }
  }

  // Enforce the entity cardinality if it's not set to unlimited.
  if ($entity_cardinality > 0) {

    // Get the current instances of this content entity in the group.
    $entity_instances = $group
      ->getContentByEntityId($plugin
      ->getPluginId(), $entity
      ->id());
    $entity_count = count($entity_instances);

    // If the current group content entity has an ID, exclude that one.
    if ($group_content_id = $group_content
      ->id()) {
      foreach ($entity_instances as $instance) {

        /** @var \Drupal\group\Entity\GroupContentInterface $instance */
        if ($instance
          ->id() == $group_content_id) {
          $entity_count--;
          break;
        }
      }
    }

    // Raise a violation if the content has reached the cardinality limit.
    if ($entity_count >= $entity_cardinality) {
      $this->context
        ->buildViolation($constraint->entityMessage)
        ->setParameter('@field', $field_name)
        ->setParameter('%content', $entity
        ->label())
        ->setParameter('%group', $group
        ->label())
        ->atPath('entity_id.0')
        ->addViolation();
    }
  }
}