Fix double post on modded servers

config.example.json

@@ -22,6 +22,7 @@
   "disable-status-updates": false,
   "disable-version-check": false,
   "hide-prefix": false,
+  "server-is-modded": false,
   "horde-frequency": "7",
   "log-console": false,
   "log-messages": false,

index.js

@@ -43,6 +43,10 @@ var d7dtdState = {
 // We have to treat the channel ID as a string or the number will parse incorrectly.
 var argv = minimist(process.argv.slice(2), {string: ["channel","port"]});
 
+// cache previous Message to check for double messages
+var previousMsg;
+var reg = /\[.*\]\(.*\)\[-\]\[[a-fA-F\d]{3,6}\]([^[]+)\[-](: .+)/;
+
 // This is a simple check to see if we're using arguments or the config file.
 // If the user is using arguments, config.json is ignored.
 var config;
@@ -143,6 +147,34 @@ const configPrivate = {
 new DishordeInitializer(pjson, config, configPrivate);
 
 ////// # Functions # //////
+function ServerToolsRegex(msg) {
+  // Check for ServerTools color code prefix and remove it to
+  // align with normal messages
+  try {
+    let newMsg = msg.match(reg);
+    msg = newMsg[1] + newMsg[2];
+    console.log(`regex matched, ${newMsg}`);
+  }
+  catch {
+    // regex did not match
+    console.log(`regex did not match`);
+  }
+  return msg;
+}
+
+function checkForDoubleMsg(msg) {
+  // Check for ServerTools
+  msg = ServerToolsRegex(msg);
+  if(msg == previousMsg) {
+    // Message was the same, so return nothing
+    msg = "";
+  }
+  // set new cached message, either because it differed or
+  // to reset the msg so that only double posts are filtered
+  previousMsg = msg;
+  return msg;
+}
+
 function sanitizeMsgFromGame(msg) {
   // Replace @everyone and @here
   msg = msg.replace(/@everyone|@here|<@.*>/g, "`$&`");
@@ -152,7 +184,9 @@ function sanitizeMsgFromGame(msg) {
     msg = msg.replace(/https:\/\//g, "https\\://");
     msg = msg.replace(/http:\/\//g, "http\\://");
   }
-
+  if(config["server-is-modded"]) {
+    msg = checkForDoubleMsg(msg);
+  }
   return msg;
 }