From f7fadb9b7e73e2b5a11de5aa9fa4015f661f7a73 Mon Sep 17 00:00:00 2001
From: Ruediger Marwein <ruediger_marwein@hugoboss.com>
Date: Tue, 31 May 2022 18:54:47 +0200
Subject: [PATCH] add condition in case the file of the page does not exist.

---
 action.php | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/action.php b/action.php
index 1413e49..8e0d61d 100644
--- a/action.php
+++ b/action.php
@@ -33,15 +33,18 @@ class action_plugin_usetheme extends DokuWiki_Action_Plugin {
     public function _handleConf(Doku_Event $event, $param) {
         global $ID, $ACT, $conf;
         $dataFile = wikiFN(cleanID($ID));
-        $fp = fopen($dataFile,"r");
-        $firstLine = fgets($fp,512);
-        fclose($fp);
-        preg_match('/~~USETHEME:(.*?)~~/', $firstLine, $match);
-        $template = trim($match[1]);
-        if($template) {
-            $conf['template'] = $template;
+        if(is_file($dataFile)) {
+            $fp = fopen($dataFile,"r");
+            $firstLine = fgets($fp,512);
+            fclose($fp);
+            preg_match('/~~USETHEME:(.*?)~~/', $firstLine, $match);
+            $template = trim($match[1]);
+            if($template) {
+                $conf['template'] = $template;
+            }
         }
     }
+
 }
 
 // vim:ts=4:sw=4: