backup.

lib/utils/utils.dart

@@ -12,6 +12,7 @@ import 'package:hive/hive.dart';
 import 'package:intl/intl.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:universal_io/io.dart';
+import '../constants.dart';
 import 'util_web.dart' if (dart.library.io) 'util_io.dart';
 
 import '../routes.dart';
@@ -267,6 +268,47 @@ class Utils {
       onError(error);
     });
   }
+
+  static String getOs({bool checkWeb = false}) {
+    if (checkWeb && kIsWeb) {
+      return 'web';
+    }
+    if (Platform.isAndroid) {
+      return 'android';
+    }
+    if (Platform.isIOS) {
+      return 'ios';
+    }
+    if (Platform.isLinux) {
+      return 'ubuntu';
+    }
+    if (Platform.isMacOS) {
+      return 'mac';
+    }
+    if (Platform.isWindows) {
+      return 'windows';
+    }
+    return 'web';
+  }
+
+  static int getOsFontHex(String os) {
+    if (os == 'mac') {
+      return Constants.FONT_APPLE;
+    }
+    if (os == 'windows') {
+      return Constants.FONT_WINDOWS;
+    }
+    if (os == 'ubuntu') {
+      return Constants.FONT_UBUNTU;
+    }
+    if (os == 'android') {
+      return Constants.FONT_ANDROID;
+    }
+    if (os == 'ios') {
+      return Constants.FONT_IOS;
+    }
+    return Constants.FONT_TOPTONS;
+  }
 }
 
 class RuntimeError extends Error{