From 90894c2e390052c949ea5d85d6959503d671ef61 Mon Sep 17 00:00:00 2001
From: Anthony Malkoun <anthony.malkoun@dpc.vic.gov.au>
Date: Wed, 6 Jan 2021 17:47:21 +1100
Subject: [PATCH] Check that $node is properly populated before continuing

Some routes that have a 'node' parameter don't necessarily
hydrate the parameter, e.g. /node/$nid/revisions/$vid/revert
---
 .../tide_site_preview/src/Plugin/Block/PreviewLinksBlock.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/modules/tide_site_preview/src/Plugin/Block/PreviewLinksBlock.php b/modules/tide_site_preview/src/Plugin/Block/PreviewLinksBlock.php
index 3de2470..70d421c 100644
--- a/modules/tide_site_preview/src/Plugin/Block/PreviewLinksBlock.php
+++ b/modules/tide_site_preview/src/Plugin/Block/PreviewLinksBlock.php
@@ -235,6 +235,11 @@ protected function getCurrentNode() : ?NodeInterface {
         $node = NULL;
       }
     }
+
+    if (!($node instanceof NodeInterface)) {
+      $node = NULL;
+    }
+
     $this->currentNode = $node;
 
     return $this->currentNode;