feat: main screen for admin only

lib/main.dart

 import 'package:flutter/material.dart';
 import 'package:flutter/gestures.dart';
-import 'package:library_app/src/providers/book_provider.dart';
-import 'package:library_app/src/screens/form_screen.dart';
-import 'package:provider/provider.dart';
-import 'package:google_fonts/google_fonts.dart';
 
+import 'package:google_fonts/google_fonts.dart';
+import 'package:library_app/src/screens/admin_list_screen.dart';
+import 'package:provider/provider.dart';
 import 'package:library_app/src/providers/auth_provider.dart';
 import 'package:library_app/src/providers/navigations_provider.dart';
+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_screen.dart';
 
 void main() {
   runApp(const LibraryApp());
 }
 
-class LibraryApp extends StatelessWidget {
+class LibraryApp extends StatefulWidget {
   const LibraryApp({super.key});
+
+  @override
+  State<LibraryApp> createState() => _LibraryApp();
+}
+
+class _LibraryApp extends State<LibraryApp> {
   @override
   Widget build(BuildContext context) {
     const title = 'Library App';
@@ -36,9 +44,16 @@ class LibraryApp extends StatelessWidget {
         ),
         home: Consumer<AuthProvider>(
           builder: (context, authProvider, child) {
-            return authProvider.isLoggedIn
-                ? const ListScreen()
-                : const LoginScreen();
+            final user = authProvider.user;
+            final isAuthenticated = authProvider.isAuthenticated;
+
+            if (user != null && user.isStaff) {
+              return isAuthenticated
+                  ? const AdminListScreen()
+                  : const AdminLoginScreen();
+            }
+
+            return isAuthenticated ? const ListScreen() : const LoginScreen();
           },
         ),
         scrollBehavior: AdaptiveScrollBehavior(),

lib/src/providers/auth_provider.dart

@@ -12,7 +12,7 @@ class AuthProvider with ChangeNotifier {
   String baseUrl = 'http://localhost:8000/api/v1';
 
   User? user;
-  bool isLoggedIn = false;
+  bool isAuthenticated = false;
   bool invalidUsernameOrPassword = false;
   List<dynamic>? memberLoans;
 
@@ -31,6 +31,15 @@ class AuthProvider with ChangeNotifier {
     return await storage.read(key: 'access_token');
   }
 
+  Future<void> validateToken() async {
+    String? token = await getAccessToken();
+    bool isValid = token != null;
+
+    if (isValid) {
+      isAuthenticated = true;
+    }
+  }
+
   Future<void> signIn(String username, String password) async {
     try {
       final response = await http.post(
@@ -45,7 +54,7 @@ class AuthProvider with ChangeNotifier {
 
         final token = await getAccessToken();
         if (token != null) {
-          isLoggedIn = true;
+          validateToken();
         }
 
         debugPrint("Login successful $token");
@@ -78,7 +87,7 @@ class AuthProvider with ChangeNotifier {
 
         final token = await getAccessToken();
         if (token != null) {
-          isLoggedIn = true;
+          validateToken();
         }
 
         debugPrint("Login successful $token");
@@ -111,7 +120,8 @@ class AuthProvider with ChangeNotifier {
 
       if (response.statusCode == 200) {
         await storage.delete(key: 'token');
-        isLoggedIn = false;
+        isAuthenticated = false;
+        user = null;
       } else {
         debugPrint("Logout failed: ${response.statusCode} ${response.body}");
       }
@@ -141,7 +151,7 @@ class AuthProvider with ChangeNotifier {
 
         final token = await getAccessToken();
         if (token != null) {
-          isLoggedIn = true;
+          validateToken();
         }
 
         debugPrint(response.body);

lib/src/screens/admin_list_screen.dart

+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+
+import 'package:library_app/src/providers/auth_provider.dart';
+import 'package:library_app/src/providers/book_provider.dart';
+import 'package:library_app/src/providers/navigations_provider.dart';
+
+import 'package:library_app/src/widgets/home.dart';
+import 'package:library_app/src/widgets/loans/loan_list.dart';
+import 'package:library_app/src/widgets/profile.dart';
+
+class AdminListScreen extends StatefulWidget {
+  const AdminListScreen({super.key});
+
+  @override
+  State<AdminListScreen> createState() => _AdminListScreen();
+}
+
+class _AdminListScreen extends State<AdminListScreen> {
+  @override
+  void initState() {
+    super.initState();
+    Provider.of<BookProvider>(context, listen: false).getCategories();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer2<NavigationsProvider, AuthProvider>(
+      builder: (context, navProvider, authProvider, child) {
+        return Scaffold(
+          bottomNavigationBar: NavigationBar(
+            onDestinationSelected: (int index) {
+              navProvider.navigate(index);
+            },
+            selectedIndex: navProvider.currentPageIndex,
+            destinations: const <Widget>[
+              NavigationDestination(
+                icon: Icon(Icons.home_outlined),
+                label: 'Home',
+                tooltip: 'Home Page',
+              ),
+              NavigationDestination(
+                icon: Icon(Icons.timer_outlined),
+                label: 'Upcoming',
+                tooltip: 'Book List',
+              ),
+              NavigationDestination(
+                icon: Icon(Icons.timer_off_rounded),
+                label: 'Overdued',
+                tooltip: 'Loan List',
+              ),
+              NavigationDestination(
+                icon: Icon(Icons.person_2_sharp),
+                label: 'Profile',
+                tooltip: 'Profile',
+              ),
+            ],
+          ),
+          body: <Widget>[
+            // Home
+            const HomePage(),
+            // Books
+            LoanList(
+              memberId: authProvider.user?.accountId ?? 0,
+            ),
+            // Loans
+            LoanList(
+              memberId: authProvider.user?.accountId ?? 0,
+            ),
+            // Profile
+            const Profile(),
+          ][navProvider.currentPageIndex],
+        );
+      },
+    );
+  }
+}

lib/src/widgets/home.dart

@@ -27,8 +27,8 @@ class _HomePage extends State<HomePage> {
   Widget build(BuildContext context) {
     const title = "Home";
 
-    return Consumer<NavigationsProvider>(
-      builder: (context, navProvider, child) {
+    return Consumer2<NavigationsProvider, AuthProvider>(
+      builder: (context, navProvider, authProvider, child) {
         return NestedScrollView(
           headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
             return [
@@ -42,17 +42,29 @@ class _HomePage extends State<HomePage> {
                 child: Text("Shortcut"),
               ),
               Shortcut(
-                icon: Icons.book_rounded,
-                title: "Books",
-                subtitle: "Discover many amazing books.",
+                icon: authProvider.user!.isStaff
+                    ? Icons.timer_outlined
+                    : Icons.book_rounded,
+                title: authProvider.user!.isStaff
+                    ? "Near Outstanding Loans"
+                    : "Books",
+                subtitle: authProvider.user!.isStaff
+                    ? "Discover near outstanding users loans."
+                    : "Discover many amazing books.",
                 onTap: () {
                   navProvider.navigate(1);
                 },
               ),
               Shortcut(
-                icon: Icons.date_range_rounded,
-                title: "Book Loans",
-                subtitle: "Manage your book loan very easy.",
+                icon: authProvider.user!.isStaff
+                    ? Icons.timer_off_rounded
+                    : Icons.date_range_rounded,
+                title: authProvider.user!.isStaff
+                    ? "Overdued Loans"
+                    : "Book Loans",
+                subtitle: authProvider.user!.isStaff
+                    ? "Discover Overdued users loans."
+                    : "Manage your book loan very easy.",
                 onTap: () {
                   navProvider.navigate(2);
                 },

lib/src/widgets/loans/loan_list.dart

@@ -54,7 +54,7 @@ class _LoanList extends State<LoanList> {
             return [const TopAppBar(title: "Book Loans")];
           },
           body: const Center(
-            child: CircularProgressIndicator(),
+            child: Text("the loan is currently empty"),
           ),
         );
       }