From bbadd46b4c09d00739e0d48943617f4d49d006db Mon Sep 17 00:00:00 2001
From: Akanksha <akankshasingh.viet@gmail.com>
Date: Fri, 18 Oct 2024 15:17:54 +0530
Subject: [PATCH] DDST-593: Hardening

---
 src/Plugin/Block/DisplayCitationsBlock.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Plugin/Block/DisplayCitationsBlock.php b/src/Plugin/Block/DisplayCitationsBlock.php
index a422895..ae19e99 100644
--- a/src/Plugin/Block/DisplayCitationsBlock.php
+++ b/src/Plugin/Block/DisplayCitationsBlock.php
@@ -11,6 +11,7 @@
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Url;
 use Drupal\islandora_citations\IslandoraCitationsHelper;
+use Drupal\node\NodeInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -177,7 +178,7 @@ public function blockSubmit($form, FormStateInterface $form_state) {
   public function getCacheTags() {
     // Retrieve the node ID.
     $node = $this->routeMatch->getParameter('node');
-    $node_id = $node ? $node->id() : NULL;
+    $node_id = $node instanceof NodeInterface ? $node->id() : NULL;
 
     // Return cache tags.
     if ($node_id) {