From 80204518a25bb98beb0790f06496f19ec66d61ca Mon Sep 17 00:00:00 2001
From: Dan Brown <development@danb.me>
Date: Thu, 19 Feb 2026 23:25:00 +0000
Subject: [PATCH] Page Content: Better handling for empty content filtering

For #6028
---
 app/Util/HtmlDocument.php       |  8 +++++++-
 tests/Entity/PageEditorTest.php | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/app/Util/HtmlDocument.php b/app/Util/HtmlDocument.php
index 7517955b9..c1ec2cf41 100644
--- a/app/Util/HtmlDocument.php
+++ b/app/Util/HtmlDocument.php
@@ -103,7 +103,13 @@ class HtmlDocument
      */
     public function getBody(): DOMNode
     {
-        return $this->document->getElementsByTagName('body')[0];
+        $bodies = $this->document->getElementsByTagName('body');
+
+        if ($bodies->length === 0) {
+            return new DOMElement('body', '');
+        }
+
+        return $bodies[0];
     }
 
     /**
diff --git a/tests/Entity/PageEditorTest.php b/tests/Entity/PageEditorTest.php
index 4cd3c1671..67283f704 100644
--- a/tests/Entity/PageEditorTest.php
+++ b/tests/Entity/PageEditorTest.php
@@ -282,4 +282,23 @@ class PageEditorTest extends TestCase
         $resp->assertOk();
         $resp->assertDontSee('hellotherethisisaturtlemonster', false);
     }
+
+    public function test_editor_html_filtered_does_not_cause_error_if_empty()
+    {
+        $emptyExamples = ['', '<p></p>', '<p>&nbsp;</p>', ' ', "\n"];
+        $editor = $this->users->editor();
+        $page = $this->entities->page();
+        $page->updated_by = $editor->id;
+
+        foreach ($emptyExamples as $emptyExample) {
+            $page->html = $emptyExample;
+            $page->save();
+
+            $resp = $this->asAdmin()->get($page->getUrl('edit'));
+            $resp->assertOk();
+
+            $resp = $this->asAdmin()->get("/ajax/page/{$page->id}");
+            $resp->assertOk();
+        }
+    }
 }