From 7b2536e0bef980a9d153522320c14dc5261b4ba4 Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Wed, 2 May 2018 14:39:52 +0200
Subject: [PATCH] page: replace missing placeholders by warning

---
 page.php | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/page.php b/page.php
index c6eee87..290a596 100644
--- a/page.php
+++ b/page.php
@@ -26,7 +26,12 @@ function getoutput($blocks = [])
 		'< \[\[ ([^]]*) \]\] >x',
 		function ($sub) use ($blocks) {
 			list ($placeholder, $name) = $sub;
-			$html = $blocks[$name];
+			if (isset($blocks[$name])) {
+				$html = $blocks[$name];
+			}
+			else {
+				$html = '<strong class="warn"><em>'.$name.'</em> ontbreekt</strong>';
+			}
 			return sprintf('<!--BLOCK:%s-->%s<!--/-->',
 				is_numeric($name) ? '' : $placeholder, # edit replacement
 				preg_replace('{<!--[^-]*-->}', '', $html) # contents
-- 
2.30.0