Add locking

router.php

@@ -1,6 +1,30 @@
 <?php
+
 require "parsedown.php";
 
+$tryuri = ltrim("$_SERVER[REQUEST_URI]", '/');
+$tryuri = strtok($tryuri, "?");
+
+$lockscn = $tryuri;
+
+if (file_exists("$lockscn.lock" ))
+    return;
+
+while ($lockscn != "") {
+    $files = scandir($lockscn);
+
+    if (!$files)
+        goto CONT;
+
+    for ($i = 2; $i < count($files); $i++) {
+        if ($files[$i] == "lock") {
+            return;
+        }
+    }
+
+    CONT:
+    $lockscn = substr($lockscn, 0, strrpos($lockscn, '/'));
+}
 
 if (file_exists("site.json")) {
     $site = json_decode(file_get_contents("site.json"), true);
@@ -10,8 +34,7 @@ if (preg_match('/\.(?:jpg|png|css|ico|scss|js|ttf|woff|txt)/', $_SERVER["REQUEST
     return false;
 }
 
-$tryuri = ltrim("$_SERVER[REQUEST_URI]", '/');
+
-$tryuri = strtok($tryuri, "?");
 
 load_page($tryuri);