fix: handle login session on android

lib/main.dart

 import 'package:flutter/material.dart';
 import 'package:flutter/gestures.dart';
 import 'package:go_router/go_router.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 import 'package:google_fonts/google_fonts.dart';
 import 'package:library_app/src/screens/profile_edit_screen.dart';
@@ -12,8 +13,11 @@ import 'package:library_app/src/providers/book_provider.dart';
 import 'package:library_app/src/screens/form_screen.dart';
 import 'package:library_app/src/screens/list/list_screen.dart';
 
-void main() {
-  runApp(const LibraryApp());
+void main() async {
+  SharedPreferences prefs = await SharedPreferences.getInstance();
+  final isAuthenticated = prefs.getString('access_token') != null;
+
+  runApp(isAuthenticated ? const LibraryApp() : const LoginScreen());
 }
 
 class LibraryApp extends StatefulWidget {
@@ -32,17 +36,11 @@ class _LibraryApp extends State<LibraryApp> {
       routes: [
         GoRoute(
           path: '/',
-          builder: (context, state) =>
-              Provider.of<AuthProvider>(context).isAuthenticated
-                  ? const ListScreen()
-                  : const LoginScreen(),
+          builder: (context, state) => const ListScreen(),
         ),
         GoRoute(
           path: '/sign-up',
-          builder: (context, state) =>
-              Provider.of<AuthProvider>(context).isAuthenticated
-                  ? const ListScreen()
-                  : const SignUpScreen(),
+          builder: (context, state) => const SignUpScreen(),
         ),
         GoRoute(
           path: '/reset-password',

lib/src/providers/auth_provider.dart

 import 'dart:convert';
 import 'package:flutter/widgets.dart';
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 import 'package:go_router/go_router.dart';
 import 'package:http/http.dart' as http;
@@ -9,13 +9,10 @@ import 'package:library_app/src/models/token.dart';
 import 'package:library_app/src/models/user.dart';
 
 class AuthProvider with ChangeNotifier {
-  final storage = const FlutterSecureStorage();
-
   String baseUrl = 'https://ilhammaulana.pythonanywhere.com/api/v1';
   String? message;
 
   User? user;
-  bool isAuthenticated = false;
   bool invalidUsernameOrPassword = false;
   List<dynamic>? memberLoans;
 
@@ -38,11 +35,13 @@ class AuthProvider with ChangeNotifier {
   List<dynamic>? overduedLoans;
 
   Future<void> storeAccessToken(String accessToken) async {
-    await storage.write(key: 'access_token', value: accessToken);
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    await prefs.setString('access_token', accessToken);
   }
 
   Future<String?> getAccessToken() async {
-    return await storage.read(key: 'access_token');
+    SharedPreferences prefs = await SharedPreferences.getInstance();
+    return prefs.getString('access_token');
   }
 
   void setLoading(bool value) {
@@ -67,7 +66,6 @@ class AuthProvider with ChangeNotifier {
     overduedLoans = null;
     totalPages = null;
 
-    isAuthenticated = false;
     invalidUsernameOrPassword = false;
     filterByUpcoming = false;
     filterByOverdued = false;
@@ -100,7 +98,6 @@ class AuthProvider with ChangeNotifier {
         String token = Token.fromJson(data)!.key;
         await storeAccessToken(token);
 
-        isAuthenticated = true;
         setInvalidUsernameOrPassword(false);
 
         debugPrint("Login successful $token");
@@ -133,7 +130,8 @@ class AuthProvider with ChangeNotifier {
       );
 
       if (response.statusCode == 200) {
-        await storage.delete(key: 'token');
+        SharedPreferences prefs = await SharedPreferences.getInstance();
+        prefs.remove('access_token');
         resetAllState();
       } else {
         debugPrint("Logout failed: ${response.statusCode} ${response.body}");
@@ -165,7 +163,6 @@ class AuthProvider with ChangeNotifier {
         final data = jsonDecode(response.body);
         String token = Token.fromJson(data)!.key;
         storeAccessToken(token);
-        isAuthenticated = true;
         message = null;
 
         if (context.mounted) {
@@ -482,7 +479,7 @@ class AuthProvider with ChangeNotifier {
 
   // for admin or librarian
   Future<void> getLoans(String? type) async {
-    final token = await storage.read(key: 'access_token');
+    final token = await getAccessToken();
     String url = "$baseUrl/book-loans";
     if (type == "upcoming") {
       url += '?near_outstanding=True';

linux/flutter/generated_plugin_registrant.cc

@@ -6,10 +6,6 @@
 
 #include "generated_plugin_registrant.h"
 
-#include <flutter_secure_storage_linux/flutter_secure_storage_linux_plugin.h>
 
 void fl_register_plugins(FlPluginRegistry* registry) {
-  g_autoptr(FlPluginRegistrar) flutter_secure_storage_linux_registrar =
-      fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterSecureStorageLinuxPlugin");
-  flutter_secure_storage_linux_plugin_register_with_registrar(flutter_secure_storage_linux_registrar);
 }

linux/flutter/generated_plugins.cmake

@@ -3,7 +3,6 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
-  flutter_secure_storage_linux
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,10 +5,10 @@
 import FlutterMacOS
 import Foundation
 
-import flutter_secure_storage_macos
 import path_provider_foundation
+import shared_preferences_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
-  FlutterSecureStoragePlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStoragePlugin"))
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
+  SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
 }

pubspec.lock

@@ -81,6 +81,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "5fc22d7c25582e38ad9a8515372cd9a93834027aacf1801cf01164dac0ffa08c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -94,54 +102,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.0"
-  flutter_secure_storage:
-    dependency: "direct main"
-    description:
-      name: flutter_secure_storage
-      sha256: "165164745e6afb5c0e3e3fcc72a012fb9e58496fb26ffb92cf22e16a821e85d0"
-      url: "https://pub.dev"
-    source: hosted
-    version: "9.2.2"
-  flutter_secure_storage_linux:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_linux
-      sha256: "4d91bfc23047422cbcd73ac684bc169859ee766482517c22172c86596bf1464b"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.1"
-  flutter_secure_storage_macos:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_macos
-      sha256: "1693ab11121a5f925bbea0be725abfcfbbcf36c1e29e571f84a0c0f436147a81"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.2"
-  flutter_secure_storage_platform_interface:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_platform_interface
-      sha256: cf91ad32ce5adef6fba4d736a542baca9daf3beac4db2d04be350b87f69ac4a8
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.2"
-  flutter_secure_storage_web:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_web
-      sha256: f4ebff989b4f07b2656fb16b47852c0aab9fed9b4ec1c70103368337bc1886a9
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.1"
-  flutter_secure_storage_windows:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_windows
-      sha256: b20b07cb5ed4ed74fc567b78a72936203f587eba460af1df11281c9326cd3709
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.2"
   flutter_svg:
     dependency: "direct main"
     description:
@@ -200,14 +160,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.19.0"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.7"
   leak_tracker:
     dependency: transitive
     description:
@@ -376,6 +328,62 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.1.2"
+  shared_preferences:
+    dependency: "direct main"
+    description:
+      name: shared_preferences
+      sha256: c272f9cabca5a81adc9b0894381e9c1def363e980f960fa903c604c471b22f68
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.1"
+  shared_preferences_android:
+    dependency: transitive
+    description:
+      name: shared_preferences_android
+      sha256: a7e8467e9181cef109f601e3f65765685786c1a738a83d7fbbde377589c0d974
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.1"
+  shared_preferences_foundation:
+    dependency: transitive
+    description:
+      name: shared_preferences_foundation
+      sha256: c4b35f6cb8f63c147312c054ce7c2254c8066745125264f0c88739c417fc9d9f
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.5.2"
+  shared_preferences_linux:
+    dependency: transitive
+    description:
+      name: shared_preferences_linux
+      sha256: "580abfd40f415611503cae30adf626e6656dfb2f0cee8f465ece7b6defb40f2f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_platform_interface:
+    dependency: transitive
+    description:
+      name: shared_preferences_platform_interface
+      sha256: "57cbf196c486bc2cf1f02b85784932c6094376284b3ad5779d1b1c6c6a816b80"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
+  shared_preferences_web:
+    dependency: transitive
+    description:
+      name: shared_preferences_web
+      sha256: d2ca4132d3946fec2184261726b355836a82c33d7d5b67af32692aff18a4684e
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  shared_preferences_windows:
+    dependency: transitive
+    description:
+      name: shared_preferences_windows
+      sha256: "94ef0f72b2d71bc3e700e025db3710911bd51a71cefb65cc609dd0d9a982e3c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -485,14 +493,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.0"
-  win32:
-    dependency: transitive
-    description:
-      name: win32
-      sha256: "68d1e89a91ed61ad9c370f9f8b6effed9ae5e0ede22a270bdfa6daf79fc2290a"
-      url: "https://pub.dev"
-    source: hosted
-    version: "5.5.4"
   xdg_directories:
     dependency: transitive
     description:

pubspec.yaml

@@ -40,8 +40,8 @@ dependencies:
   intl: ^0.19.0
   provider: ^6.1.2
   http: ^1.2.2
-  flutter_secure_storage: ^9.2.2
   go_router: ^14.2.1
+  shared_preferences: ^2.3.1
 
 dev_dependencies:
   flutter_test:

windows/flutter/generated_plugin_registrant.cc

@@ -6,9 +6,6 @@
 
 #include "generated_plugin_registrant.h"
 
-#include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
 
 void RegisterPlugins(flutter::PluginRegistry* registry) {
-  FlutterSecureStorageWindowsPluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("FlutterSecureStorageWindowsPlugin"));
 }

windows/flutter/generated_plugins.cmake

@@ -3,7 +3,6 @@
 #
 
 list(APPEND FLUTTER_PLUGIN_LIST
-  flutter_secure_storage_windows
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST