From d7d630337e2664dc0b08e479d7dc2967612143bb Mon Sep 17 00:00:00 2001
From: David Bohn <david.bohn@tts-security.com>
Date: Thu, 11 Aug 2022 09:43:01 +0200
Subject: [PATCH] Ignore missing code tag in code block parsing

---
 src/Nodes/CodeBlock.php                 |  4 ++++
 tests/DOMParser/Nodes/CodeBlockTest.php | 21 +++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/src/Nodes/CodeBlock.php b/src/Nodes/CodeBlock.php
index 44d1d0e..0adb03f 100644
--- a/src/Nodes/CodeBlock.php
+++ b/src/Nodes/CodeBlock.php
@@ -33,6 +33,10 @@ public function addAttributes()
         return [
             'language' => [
                 'parseHTML' => function ($DOMNode) {
+                    if (!($DOMNode->childNodes[0] instanceof \DOMElement)) {
+                        return null;
+                    }
+
                     return preg_replace(
                         "/^" . $this->options['languageClassPrefix']. "/",
                         "",
diff --git a/tests/DOMParser/Nodes/CodeBlockTest.php b/tests/DOMParser/Nodes/CodeBlockTest.php
index c14c8fa..b5a8f65 100644
--- a/tests/DOMParser/Nodes/CodeBlockTest.php
+++ b/tests/DOMParser/Nodes/CodeBlockTest.php
@@ -123,3 +123,24 @@
         ],
     ]);
 });
+
+test('it handles code blocks without a code tag', function () {
+    $html = '<pre>body { display: none }</pre>';
+
+    $result = (new Editor)->setContent($html)->getDocument();
+
+    expect($result)->toEqual([
+        'type' => 'doc',
+        'content' => [
+            [
+                'type' => 'codeBlock',
+                'content' => [
+                    [
+                        'type' => 'text',
+                        'text' => 'body { display: none }',
+                    ],
+                ],
+            ],
+        ],
+    ]);
+});