EntityWorkspaceConflictConstraintValidator.php

<?php

namespace Drupal\workspaces\Plugin\Validation\Constraint;

use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\workspaces\WorkspaceAssociationInterface;
use Drupal\workspaces\WorkspaceManagerInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

/**
 * Validates the EntityWorkspaceConflict constraint.
 *
 * @internal
 */
class EntityWorkspaceConflictConstraintValidator extends ConstraintValidator implements ContainerInjectionInterface {
    public function __construct(EntityTypeManagerInterface $entityTypeManager, WorkspaceManagerInterface $workspaceManager, WorkspaceAssociationInterface $workspaceAssociation) {
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('entity_type.manager'), $container->get('workspaces.manager'), $container->get('workspaces.association'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate($entity, Constraint $constraint) {
        
        /** @var \Drupal\Core\Entity\EntityInterface $entity */
        if (isset($entity) && !$entity->isNew()) {
            $active_workspace = $this->workspaceManager
                ->getActiveWorkspace();
            // If the entity is tracked in a workspace, it can only be edited in
            // that workspace or one of its descendants.
            if ($tracking_workspace_ids = $this->workspaceAssociation
                ->getEntityTrackingWorkspaceIds($entity, TRUE)) {
                if (!$active_workspace || !in_array($active_workspace->id(), $tracking_workspace_ids, TRUE)) {
                    $first_tracking_workspace_id = reset($tracking_workspace_ids);
                    $workspace = $this->entityTypeManager
                        ->getStorage('workspace')
                        ->load($first_tracking_workspace_id);
                    $this->context
                        ->buildViolation($constraint->message)
                        ->setParameter('@label', $workspace->label())
                        ->addViolation();
                }
            }
        }
    }

}