How to Implement Role-Based Routing in Flutter with JWT Authentication?

Question

I am a beginner in mobile development using Flutter, and I want to set up role-based routing for my app by creating a separate routing file in Dart. My app uses JWT authentication, and the token is already stored locally. However, this is my first time implementing role-based access, and I am not sure how to proceed.

How can I set up role-based routing in Flutter based on the user's role from the JWT token? Any guidance or examples would be greatly appreciated!

here is how i have been managing the routing for the app :

import 'package:flutter/material.dart';
import 'package:stockhive_mobile/screen/admin/departements/Departmentad.dart';
import 'package:stockhive_mobile/screen/admin/users/adduser.dart';
import 'package:stockhive_mobile/screen/auth/introduction_page.dart';
import 'package:stockhive_mobile/screen/auth/login_page.dart';
import 'package:stockhive_mobile/screen/auth/resetpassword.dart';
import 'package:stockhive_mobile/screen/auth/otp.dart';
import 'package:stockhive_mobile/screen/auth/newpassword.dart';
import 'package:stockhive_mobile/screen/auth/editprofile.dart';
import 'package:stockhive_mobile/screen/auth/onboarding.dart';
import 'package:stockhive_mobile/screen/auth/viewprofile.dart';
import 'package:stockhive_mobile/splash/splash_screen.dart';
import '../admin/departements/adddepartementscreen.dart';
import '../admin/users/userscreen.dart';
import 'AdminRoutes.dart'; // Import Admin Routes
import 'collaborator_routes.dart'; // Import Collaborator Routes
import 'package:jwt_decoder/jwt_decoder.dart';

class AppRouter {
  static const String introRoute = '/intro';
  static const String loginRoute = '/login';
  static const String onboardingRoute = '/onboarding';
  static const String resetPasswordRoute = '/forgetpassword';
  static const String otpRoute = '/otp';
  static const String newPasswordRoute = '/newpassword';
  static const String editProfileRoute = '/editprofile';
  static const String viewProfileRoute = '/viewprofile';
  static const String usersRoute = '/usersad';
  static const String adduserRoute = '/adduser';
  static const String departmentsRoute = '/department';
  static const String adddepartmentRoute = '/adddepartment';
  static const String infodepartmentRoute = '/infodepartment';
  static const String materielsRoute = '/materiel';
  static const String addmaterielRoute = '/addmateriel';
  /*static const String infomaterielRoute = '/infomateriel';
  static const String dashboardRoute = '/dashboard';*/
  static const String splashRoute = '/splash';

  static Route<dynamic> generateRoute(RouteSettings settings) {
    print('🔍 Navigation vers : ${settings.name} avec arguments : ${settings.arguments}');

    switch (settings.name) {
      case introRoute:
        return MaterialPageRoute(builder: (_) => Introduction_page());
      case onboardingRoute:
        return MaterialPageRoute(builder: (_) => IntroScreen());
      case resetPasswordRoute:
        return MaterialPageRoute(builder: (_) => ResetPassword());
      case otpRoute:
        if (settings.arguments is String) {
          return MaterialPageRoute(
              builder: (_) => OtpScreen(email: settings.arguments as String));
        }
        return _errorRoute();
      case newPasswordRoute:
        if (settings.arguments is Map<String, String>) {
          final args = settings.arguments as Map<String, String>;
          return MaterialPageRoute(
              builder: (_) => Newpassword(email: args['email']!, otp: args['otp']!));
        }
        return _errorRoute();
      case splashRoute:
        return MaterialPageRoute(builder: (_) => const SplashScreen());
      case loginRoute:
        return MaterialPageRoute(builder: (_) => LoginPage());
      case editProfileRoute:
        if (settings.arguments is Map<String, dynamic>) {
          return MaterialPageRoute(
              builder: (_) => EditProfilePage(userData: settings.arguments as Map<String, dynamic>));
        }
        return _errorRoute();
      case viewProfileRoute:
        return MaterialPageRoute(builder: (_) => ViewProfilePage());
      case usersRoute:
        return MaterialPageRoute(builder: (_) => UsersManagementPage());
      case adduserRoute:
        return MaterialPageRoute(builder: (_) => AddUser());
      case departmentsRoute:
        return MaterialPageRoute(builder: (_) => DepartmentManagementPage());
      case adddepartmentRoute:
        return MaterialPageRoute(builder: (_) => AddDepartment());

      default:
        return _errorRoute();
    }
  }

  static Route<dynamic> _errorRoute() {
    print('❌ Erreur de navigation : Route non trouvée');
    return MaterialPageRoute(
      builder: (_) => Scaffold(
        appBar: AppBar(title: Text("Page introuvable")),
        body: Center(child: Text("Erreur 404 - Page introuvable")),
      ),
    );
  }
}

Could you add a little snipped on how you extract the role information from the token? — MisterMirko
– MisterMirko, Commented Apr 2 at 11:46

MisterMirko · Accepted Answer · 2025-04-02 12:01:19Z

Depending on the complexity you could

add a second switch statement or
put the auth-logic in a seperate function (which could be in seperate part files)

first approach

static Route<dynamic> generateRoute(RouteSettings settings, String role) {
    print('🔍 Navigation vers : ${settings.name} avec arguments : ${settings.arguments}');

    switch (settings.name) {
      case introRoute:
        switch(role) {
          case "admin": 
            return MaterialPageRoute(builder: (_) => AdminIntroductionPage());
          case "user":
            return MaterialPageRoute(builder: (_) => UserIntroductionPage());
          default: 
            return _errorRoute());
      case onboardingRoute:
        ...

second approach

MaterialPageRoute _showIntroductionPage(String role) {
  switch(role) {
    case "admin": 
      return MaterialPageRoute(builder: (_) => AdminIntroductionPage());
    case "user":
      return MaterialPageRoute(builder: (_) => UserIntroductionPage());
    default: 
      return _errorRoute());
}

// add functions for other pages here

static Route<dynamic> generateRoute(RouteSettings settings, String role) {
    print('🔍 Navigation vers : ${settings.name} avec arguments : ${settings.arguments}');

    switch (settings.name) {
      case introRoute:
        return _showIntroductionPage(role);
      case onboardingRoute:
        ...

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How to Implement Role-Based Routing in Flutter with JWT Authentication?

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first approach

second approach

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