Adding authorized user check for incoming messages.

index.js

@@ -17,12 +17,15 @@ if (fs.existsSync('./config.ini')) {
   const config = ini.parse(fs.readFileSync('./config.ini', 'utf-8'));
   let sk = config.nostr.pkhex;
   let pk = nostr.getPublicKey(sk);
+  const authorizedUsers = config.authorized_users.users
+  ? config.authorized_users.users.split(',').map(user => user.trim())
+  : [];
 
   xmpp.on('online', function (data, to) {
     console.log('Connected with JID: ' + config.xmpp.jid);
     console.log('Pubkey: ' + pk);
   });
-  
+
   xmpp.on('chat', function (from, message) {
     function debug() {
       if (config.debug === '1') {
@@ -31,6 +34,13 @@ if (fs.existsSync('./config.ini')) {
         console.log(from);
       };
     }
+
+    if (!authorizedUsers.includes(from)) {
+      xmpp.send(from, 'Not authorized');
+      debug();
+      return; // Exit the function early
+    }
+
     if (message === '!help') {
       xmpp.send(from, 'https://wiki.vanderwarker.family/doku.php?id=code:nostrsms:commands');
       debug();