+<?php
+namespace Wallabag\CoreBundle\Subscriber;
+
+use Doctrine\Common\EventSubscriber;
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Event\LifecycleEventArgs;
+use Wallabag\CoreBundle\Entity\Entry;
+use Doctrine\Bundle\DoctrineBundle\Registry;
+
+/**
+ * SQLite doesn't care about cascading remove, so we need to manually remove associated stuf for an Entry.
+ * Foreign Key Support can be enabled by running `PRAGMA foreign_keys = ON;` at runtime (AT RUNTIME !).
+ * But it needs a compilation flag that not all SQLite instance has ...
+ *
+ * @see https://www.sqlite.org/foreignkeys.html#fk_enable
+ */
+class SQLiteCascadeDeleteSubscriber implements EventSubscriber
+{
+ private $doctrine;
+
+ /**
+ * @param \Doctrine\Bundle\DoctrineBundle\Registry $doctrine
+ */
+ public function __construct(Registry $doctrine)
+ {
+ $this->doctrine = $doctrine;
+ }
+
+ /**
+ * @return array
+ */
+ public function getSubscribedEvents()
+ {
+ return [
+ 'preRemove',
+ ];
+ }
+
+ /**
+ * We removed everything related to the upcoming removed entry because SQLite can't handle it on it own.
+ * We do it in the preRemove, because we can't retrieve tags in the postRemove (because the entry id is gone)
+ *
+ * @param LifecycleEventArgs $args
+ */
+ public function preRemove(LifecycleEventArgs $args)
+ {
+ $entity = $args->getEntity();
+
+ if (!$this->doctrine->getConnection()->getDriver() instanceof \Doctrine\DBAL\Driver\PDOSqlite\Driver ||
+ !$entity instanceof Entry) {
+ return;
+ }
+
+ $em = $this->doctrine->getManager();
+
+ if (null !== $entity->getTags()) {
+ foreach ($entity->getTags() as $tag) {
+ $entity->removeTag($tag);
+ }
+ }
+
+ if (null !== $entity->getAnnotations()) {
+ foreach ($entity->getAnnotations() as $annotation) {
+ $em->remove($annotation);
+ }
+ }
+
+ $em->flush();
+ }
+}