From 7c4ab95394094d35499429504c6d393df27f08a9 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Wed, 17 Mar 2021 08:51:23 +0100
Subject: global-functions: introduce $EscapeForRegEx

---
 global-functions | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/global-functions b/global-functions
index 042d89b..7b61f72 100644
--- a/global-functions
+++ b/global-functions
@@ -24,6 +24,7 @@
 :global DeviceInfo;
 :global DNSIsResolving;
 :global DownloadPackage;
+:global EscapeForRegEx;
 :global FlushEmailQueue;
 :global FlushTelegramQueue;
 :global GetMacVendor;
@@ -289,6 +290,28 @@
   :return false;
 }
 
+# escape for regular expression
+:set EscapeForRegEx do={
+  :local Input [ :tostr $1 ];
+
+  :if ([ :len $Input ] = 0) do={
+    :return "";
+  }
+
+  :local Return "";
+  :local Chars "^.[]\$()|*+\?{}\\";
+
+  :for I from=0 to=([ :len $Input ] - 1) do={
+    :local Char [ :pick $Input $I ];
+    :if ([ :find $Chars $Char ]) do={
+      :set Char ("\\" . $Char);
+    }
+    :set Return ($Return . $Char);
+  }
+
+  :return $Return;
+}
+
 # flush e-mail queue
 :set FlushEmailQueue do={
   :global EmailQueue;
-- 
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