feat: Implement authentication service and login handling with role-based navigation

frontend/lib/services/api/api_config.dart

@@ -0,0 +1,21 @@
+class ApiConfig {
+  // static const String baseUrl = 'https://ynov.ptits-pas.fr/api/v1';
+  static const String baseUrl = 'http://localhost:3000/api/v1';
+
+  // Auth endpoints
+  static const String login = '/auth/login';
+  static const String register = '/auth/register';
+  static const String refreshToken = '/auth/refresh';
+
+  // Users endpoints
+  static const String users = '/users';
+  static const String userProfile = '/users/profile';
+  static const String userChildren = '/users/children';
+
+  // Dashboard endpoints
+  static const String dashboard = '/dashboard';
+  static const String events = '/events';
+  static const String contracts = '/contracts';
+  static const String conversations = '/conversations';
+  static const String notifications = '/notifications';
+}

frontend/lib/services/auth_service.dart

@@ -1,9 +1,78 @@
 import 'dart:convert';
-import 'package:shared_preferences/shared_preferences.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:p_tits_pas/services/api/api_config.dart';
 import '../models/user.dart';
+import 'package:http/http.dart' as http;
+
+
+class AuthResponse {
+  final String acessToken;
+  final String role;
+
+  AuthResponse({required this.acessToken, required this.role});
+
+  factory AuthResponse.fromJson(Map<String, dynamic> json) {
+    return AuthResponse(
+      acessToken: json['acessToken'],
+      role: json['role'],
+    );
+  }
+}
 
 class AuthService {
-  static const String _usersKey = 'users';
+  ApiConfig apiConfig = ApiConfig();
+  String baseUrl = ApiConfig.baseUrl;
+  final storage = const FlutterSecureStorage();
+
+  //login
+  Future<AuthResponse> login(String email, String password) async {
+    final response = await http.post(
+      Uri.parse('$baseUrl${ApiConfig.login}'),
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({'email': email, 'password': password}),
+    );
+
+    if (response.statusCode == 200) {
+      final data = jsonDecode(response.body);
+      final authResponse = AuthResponse.fromJson(data);
+
+      await storage.write(key: 'access_token', value: authResponse.acessToken);
+      await storage.write(key: 'role', value: authResponse.role);
+      return authResponse;
+    } else {
+      throw Exception('Failed to login');
+    }
+  }
+
+  //register
+  Future<AppUser> register({
+    required String email,
+    required String password,
+    required String firstName,
+    required String lastName,
+    required String role,
+  }) async {
+    final response = await http.post(
+      Uri.parse('$baseUrl${ApiConfig.register}'),
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({
+        'email': email,
+        'password': password,
+        'firstName': firstName,
+        'lastName': lastName,
+        'role': role,
+      }),
+    );
+
+    if (response.statusCode == 201) {
+      final data = jsonDecode(response.body);
+      return AppUser.fromJson(data['user']);
+    } else {
+      throw Exception('Failed to register');
+    }
+  }
+
+  /*static const String _usersKey = 'users';
   static const String _parentsKey = 'parents';
   static const String _childrenKey = 'children';
 
@@ -38,5 +107,5 @@ class AuthService {
   // Méthode pour récupérer l'utilisateur connecté (mode démonstration)
   static Future<AppUser?> getCurrentUser() async {
     return null; // Aucun utilisateur en mode démonstration
-  }
+  }*/
 } 

frontend/lib/services/login_navigation_service.dart

@@ -0,0 +1,20 @@
+import 'package:flutter/cupertino.dart';
+
+class NavigationService {
+  static void handleLoginSuccess(BuildContext context, String role) {
+    switch (role) {
+      case 'admin':
+        Navigator.pushReplacementNamed(context, '/admin_dashboard');
+        break;
+      case 'gestionnaire':
+        Navigator.pushReplacementNamed(context, '/gestionnaire_dashboard');
+        break;
+      case 'parent':
+        Navigator.pushReplacementNamed(context, '/parent-dashboard');
+        break;
+      case 'assistante_maternelle':
+        Navigator.pushReplacementNamed(context, '/assistante_maternelle_dashboard');
+        break;
+    }
+  }
+}