Check for suspicious usernames

Author: l7ssha

lib/src/modules/join_logs.dart

@@ -9,6 +9,7 @@ import 'package:running_on_dart/src/settings.dart';
 import 'package:running_on_dart/src/init.dart';
 
 const idFieldName = 'ID';
+final RegExp suspiciousNameRegex = RegExp(r'^[A-Za-z]+[\._][A-Za-z]+_\d+_\d+$');
 
 class JoinLogsModule implements RequiresInitialization {
   final NyxxGateway _client = Injector.appInstance.get();
@@ -36,6 +37,10 @@ class JoinLogsModule implements RequiresInitialization {
       descriptionBuffer.write(" (New user)");
     }
 
+    if (event.member.user != null && _isSuspiciousName(event.member.user!)) {
+      descriptionBuffer.write(" (Suspicious)");
+    }
+
     final embed = EmbedBuilder(
       description: descriptionBuffer.toString(),
       author: EmbedAuthorBuilder(name: event.member.user!.username, iconUrl: event.member.user!.avatar.url),
@@ -116,6 +121,14 @@ class JoinLogsModule implements RequiresInitialization {
   String _formatDateTimeString(DateTime dateTime) =>
       '${dateTime.format(TimestampStyle.shortDate)} (${dateTime.format(TimestampStyle.relativeTime)})';
 
+  bool _isSuspiciousName(User user) {
+    if (user.globalName != null && suspiciousNameRegex.hasMatch(user.globalName!)) {
+      return true;
+    }
+
+    return suspiciousNameRegex.hasMatch(user.username);
+  }
+
   Future<bool> _isEnabledForGuild(Snowflake guildId) async {
     if (!intentFeaturesEnabled) {
       return false;