--- /dev/null
+<?php
+
+namespace Drupal\block_content\Plugin\Derivative;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Retrieves block plugin definitions for all custom blocks.
+ */
+class BlockContent extends DeriverBase implements ContainerDeriverInterface {
+
+ /**
+ * The custom block storage.
+ *
+ * @var \Drupal\Core\Entity\EntityStorageInterface
+ */
+ protected $blockContentStorage;
+
+ /**
+ * Constructs a BlockContent object.
+ *
+ * @param \Drupal\Core\Entity\EntityStorageInterface $block_content_storage
+ * The custom block storage.
+ */
+ public function __construct(EntityStorageInterface $block_content_storage) {
+ $this->blockContentStorage = $block_content_storage;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, $base_plugin_id) {
+ $entity_manager = $container->get('entity.manager');
+ return new static(
+ $entity_manager->getStorage('block_content')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDerivativeDefinitions($base_plugin_definition) {
+ $block_contents = $this->blockContentStorage->loadMultiple();
+ // Reset the discovered definitions.
+ $this->derivatives = [];
+ /** @var $block_content \Drupal\block_content\Entity\BlockContent */
+ foreach ($block_contents as $block_content) {
+ $this->derivatives[$block_content->uuid()] = $base_plugin_definition;
+ $this->derivatives[$block_content->uuid()]['admin_label'] = $block_content->label();
+ $this->derivatives[$block_content->uuid()]['config_dependencies']['content'] = [
+ $block_content->getConfigDependencyName()
+ ];
+ }
+ return parent::getDerivativeDefinitions($base_plugin_definition);
+ }
+
+}