--- /dev/null
+<?php
+
+namespace Drupal\entity\BundlePlugin;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Extension\ModuleUninstallValidatorInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\StringTranslation\TranslationInterface;
+
+/**
+ * Prevents uninstalling modules with bundle plugins in case of found data.
+ */
+class BundlePluginUninstallValidator implements ModuleUninstallValidatorInterface {
+
+ use StringTranslationTrait;
+
+ /**
+ * The entity type manager.
+ *
+ * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+ */
+ protected $entityTypeManager;
+
+ /**
+ * Constructs the object.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+ * The entity type manager.
+ * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+ * The string translation service.
+ */
+ public function __construct(EntityTypeManagerInterface $entity_type_manager, TranslationInterface $string_translation) {
+ $this->entityTypeManager = $entity_type_manager;
+ $this->stringTranslation = $string_translation;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validate($module) {
+ $reasons = [];
+
+ foreach (entity_get_bundle_plugin_entity_types() as $entity_type) {
+ /** @var \Drupal\entity\BundlePlugin\BundlePluginHandler $bundle_handler */
+ $bundle_handler = $this->entityTypeManager->getHandler($entity_type->id(), 'bundle_plugin');
+ $bundles = $bundle_handler->getBundleInfo();
+
+ // We find all bundles which have to be removed due to the uninstallation.
+ $bundles_filtered_by_module = array_filter($bundles, function ($bundle_info) use ($module) {
+ return $module === $bundle_info['provider'];
+ });
+
+ if (!empty($bundles_filtered_by_module)) {
+ $bundle_keys_with_content = array_filter(array_keys($bundles_filtered_by_module), function ($bundle) use ($entity_type) {
+ $result = $this->entityTypeManager->getStorage($entity_type->id())->getQuery()
+ ->condition($entity_type->getKey('bundle'), $bundle)
+ ->range(0, 1)
+ ->execute();
+ return !empty($result);
+ });
+
+ $bundles_with_content = array_intersect_key($bundles_filtered_by_module, array_flip($bundle_keys_with_content));
+
+ foreach ($bundles_with_content as $bundle) {
+ $reasons[] = $this->t('There is data for the bundle @bundle on the entity type @entity_type. Please remove all content before uninstalling the module.', [
+ '@bundle' => $bundle['label'],
+ '@entity_type' => $entity_type->getLabel(),
+ ]);
+ }
+ }
+ }
+
+ return $reasons;
+ }
+
+}