From 318f5c93737b126ac4ecaf425f4ce019cadde742 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Tue, 2 Jan 2018 15:48:16 +0100
Subject: [PATCH] URLs without a seperate label could end up being empty

---
 .../converter/UrlMetacodeConverter.class.php  | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/wcfsetup/install/files/lib/system/html/metacode/converter/UrlMetacodeConverter.class.php b/wcfsetup/install/files/lib/system/html/metacode/converter/UrlMetacodeConverter.class.php
index c8cf5682d5..5d1f195fce 100644
--- a/wcfsetup/install/files/lib/system/html/metacode/converter/UrlMetacodeConverter.class.php
+++ b/wcfsetup/install/files/lib/system/html/metacode/converter/UrlMetacodeConverter.class.php
@@ -1,5 +1,6 @@
 <?php
 namespace wcf\system\html\metacode\converter;
+use wcf\util\StringUtil;
 
 /**
  * Converts url bbcode into `<a>`.
@@ -22,6 +23,26 @@ class UrlMetacodeConverter extends AbstractMetacodeConverter {
 			$href = $fragment->textContent;
 		}
 		
+		// check if the link is empty, use the href value instead
+		$useHrefAsValue = false;
+		if ($fragment->childNodes->length === 0) {
+			$useHrefAsValue = true;
+		}
+		else if ($fragment->childNodes->length === 1) {
+			$node = $fragment->childNodes->item(0);
+			if ($node->nodeType === XML_TEXT_NODE && StringUtil::trim($node->textContent) === '') {
+				$useHrefAsValue = true;
+			}
+		}
+		
+		if ($useHrefAsValue) {
+			if ($fragment->childNodes->length === 1) {
+				$fragment->removeChild($fragment->childNodes->item(0));
+			}
+			
+			$fragment->appendChild($fragment->ownerDocument->createTextNode($href));
+		}
+		
 		$element->setAttribute('href', $href);
 		$element->appendChild($fragment);
 		
-- 
2.20.1