From 7ebe7f853a75a43073adf025bd2ce86e67ee6b91 Mon Sep 17 00:00:00 2001
From: Shaun Mc <29836851+shaunmccance@users.noreply.github.com>
Date: Tue, 17 Apr 2018 08:53:36 +0100
Subject: [PATCH] Stop accumulation of subjectPrefix strings

Conditional statement added to subjectPrefix section to stop accumulation of prefix strings on successive replies via same email route
---
 index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index ead0495..8cefb91 100644
--- a/index.js
+++ b/index.js
@@ -220,7 +220,9 @@ exports.processMessage = function(data) {
     header = header.replace(
       /^Subject: (.*)/mg,
       function(match, subject) {
-        return 'Subject: ' + data.config.subjectPrefix + subject;
+        if (subject.indexOf(data.config.subjectPrefix) < 0) 
+          return 'Subject: ' + data.config.subjectPrefix + subject;
+        else return 'Subject: ' + subject;
       });
   }