changed everything from filcnaplo to refilc finally

refilc/lib/models/config.dart

@@ -0,0 +1,41 @@
+import 'dart:io';
+
+class Config {
+  String _userAgent;
+  Map? json;
+  static const String _version =
+      String.fromEnvironment("APPVER", defaultValue: "3.0.4");
+
+  Config({required String userAgent, this.json}) : _userAgent = userAgent;
+
+  factory Config.fromJson(Map json) {
+    return Config(
+      userAgent: json["user_agent"] ?? "hu.ekreta.student/\$0/\$1/\$2",
+      json: json,
+    );
+  }
+
+  String get userAgent => _userAgent
+      .replaceAll("\$0", _version)
+      .replaceAll("\$1", platform)
+      .replaceAll("\$2", "0");
+
+  static String get platform {
+    if (Platform.isAndroid) {
+      return "Android";
+    } else if (Platform.isIOS) {
+      return "iOS";
+    } else if (Platform.isLinux) {
+      return "Linux";
+    } else if (Platform.isWindows) {
+      return "Windows";
+    } else if (Platform.isMacOS) {
+      return "MacOS";
+    } else {
+      return "Unknown";
+    }
+  }
+
+  @override
+  String toString() => json.toString();
+}