--- /dev/null
+<?php
+
+namespace Drupal\workspaces;
+
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Manipulates entity type information.
+ *
+ * This class contains primarily bridged hooks for compile-time or
+ * cache-clear-time hooks. Runtime hooks should be placed in EntityOperations.
+ *
+ * @internal
+ */
+class EntityTypeInfo implements ContainerInjectionInterface {
+
+ /**
+ * The entity type manager service.
+ *
+ * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+ */
+ protected $entityTypeManager;
+
+ /**
+ * The workspace manager service.
+ *
+ * @var \Drupal\workspaces\WorkspaceManagerInterface
+ */
+ protected $workspaceManager;
+
+ /**
+ * Constructs a new EntityTypeInfo instance.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+ * The entity type manager service.
+ * @param \Drupal\workspaces\WorkspaceManagerInterface $workspace_manager
+ * The workspace manager service.
+ */
+ public function __construct(EntityTypeManagerInterface $entity_type_manager, WorkspaceManagerInterface $workspace_manager) {
+ $this->entityTypeManager = $entity_type_manager;
+ $this->workspaceManager = $workspace_manager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('entity_type.manager'),
+ $container->get('workspaces.manager')
+ );
+ }
+
+ /**
+ * Adds the "EntityWorkspaceConflict" constraint to eligible entity types.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeInterface[] $entity_types
+ * An associative array of all entity type definitions, keyed by the entity
+ * type name. Passed by reference.
+ *
+ * @see hook_entity_type_build()
+ */
+ public function entityTypeBuild(array &$entity_types) {
+ foreach ($entity_types as $entity_type) {
+ if ($this->workspaceManager->isEntityTypeSupported($entity_type)) {
+ $entity_type->addConstraint('EntityWorkspaceConflict');
+ }
+ }
+ }
+
+}