From c3482fbe6b22885f5619df02387de09be0886cfe Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Thu, 6 Jan 2022 10:37:03 +0300
Subject: generate a warning if plugin-generated content of HOOK_ARTICLE_BUTTON
 or _LEFT_BUTTON can't be parsed as valid XML

---
 classes/feeds.php | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'classes/feeds.php')

diff --git a/classes/feeds.php b/classes/feeds.php
index 65027cb9e..2c37d659a 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -254,6 +254,10 @@ class Feeds extends Handler_Protected {
 
 								$line["buttons_left"] .= $button_doc->saveXML($button_doc->firstChild);
 							}
+						} else if ($result) {
+							user_error(get_class($plugin) .
+								" plugin: content provided in HOOK_ARTICLE_LEFT_BUTTON is not valid XML: " .
+								Errors::libxml_last_error() . " $result", E_USER_WARNING);
 						}
 					},
 					$line);
@@ -273,6 +277,10 @@ class Feeds extends Handler_Protected {
 
 								$line["buttons"] .= $button_doc->saveXML($button_doc->firstChild);
 							}
+						} else if ($result) {
+							user_error(get_class($plugin) .
+								" plugin: content provided in HOOK_ARTICLE_BUTTON is not valid XML: " .
+								Errors::libxml_last_error() . " $result", E_USER_WARNING);
 						}
 					},
 					$line);
-- 
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