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This commit is contained in:
Nilanjan Chakrabarti
2025-07-09 12:46:51 +05:30
commit 5e72baf1d3
458 changed files with 52259 additions and 0 deletions
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50
lib/features/auth/controllers/auth_cubit.dart Normal file
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import 'package:bloc/bloc.dart';
import 'package:kmobile/api/services/user_service.dart';
import 'package:kmobile/core/errors/exceptions.dart';
import '../../../data/repositories/auth_repository.dart';
import 'auth_state.dart';
class AuthCubit extends Cubit<AuthState> {
final AuthRepository _authRepository;
final UserService _userService;
AuthCubit(this._authRepository, this._userService) : super(AuthInitial()) {
checkAuthStatus();
}
Future<void> checkAuthStatus() async {
emit(AuthLoading());
try {
final isLoggedIn = await _authRepository.isLoggedIn();
if (isLoggedIn) {
final users = await _userService.getUserDetails();
emit(Authenticated(users));
} else {
emit(Unauthenticated());
}
} catch (e) {
emit(AuthError(e.toString()));
}
}
Future<void> refreshUserData() async {
try {
// emit(AuthLoading());
final users = await _userService.getUserDetails();
emit(Authenticated(users));
} catch (e) {
emit(AuthError('Failed to refresh user data: ${e.toString()}'));
// Optionally, re-emit the previous state or handle as needed
}
}
Future<void> login(String customerNo, String password) async {
emit(AuthLoading());
try {
final users = await _authRepository.login(customerNo, password);
emit(Authenticated(users));
} catch (e) {
emit(AuthError(e is AuthException ? e.message : e.toString()));
}
}
}

31
lib/features/auth/controllers/auth_state.dart Normal file
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import 'package:equatable/equatable.dart';
import '../../../data/models/user.dart';
abstract class AuthState extends Equatable {
@override
List<Object?> get props => [];
}
class AuthInitial extends AuthState {}
class AuthLoading extends AuthState {}
class Authenticated extends AuthState {
final List<User> users;
Authenticated(this.users);
@override
List<Object?> get props => [users];
}
class Unauthenticated extends AuthState {}
class AuthError extends AuthState {
final String message;
AuthError(this.message);
@override
List<Object?> get props => [message];
}

11
lib/features/auth/models/auth_credentials.dart Normal file
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class AuthCredentials {
final String customerNo;
final String password;
AuthCredentials({required this.customerNo, required this.password});
Map<String, dynamic> toJson() => {
'customerNo': customerNo,
'password': password,
};
}

48
lib/features/auth/models/auth_token.dart Normal file
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import 'dart:convert';
import 'dart:developer';
import 'package:equatable/equatable.dart';
class AuthToken extends Equatable {
final String accessToken;
final DateTime expiresAt;
const AuthToken({
required this.accessToken,
required this.expiresAt,
});
factory AuthToken.fromJson(Map<String, dynamic> json) {
return AuthToken(
accessToken: json['token'],
expiresAt: _decodeExpiryFromToken(json['token']),
);
}
static DateTime _decodeExpiryFromToken(String token) {
try {
final parts = token.split('.');
if (parts.length != 3) {
throw Exception('Invalid JWT');
}
final payload = parts[1];
// Pad the payload if necessary
String normalized = base64Url.normalize(payload);
final payloadMap = json.decode(utf8.decode(base64Url.decode(normalized)));
if (payloadMap is! Map<String, dynamic> || !payloadMap.containsKey('exp')) {
throw Exception('Invalid payload');
}
final exp = payloadMap['exp'];
return DateTime.fromMillisecondsSinceEpoch(exp * 1000);
} catch (e) {
// Fallback: 1 hour from now if decoding fails
log(e.toString());
return DateTime.now().add(const Duration(hours: 1));
}
}
bool get isExpired => DateTime.now().isAfter(expiresAt);
@override
List<Object> get props => [accessToken, expiresAt];
}

474
lib/features/auth/screens/login_screen.dart Normal file
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import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:kmobile/di/injection.dart';
import 'package:kmobile/features/auth/screens/mpin_screen.dart';
import 'package:kmobile/security/secure_storage.dart';
import '../../../app.dart';
import '../controllers/auth_cubit.dart';
import '../controllers/auth_state.dart';
class LoginScreen extends StatefulWidget {
const LoginScreen({super.key});
@override
LoginScreenState createState() => LoginScreenState();
}
class LoginScreenState extends State<LoginScreen>
with SingleTickerProviderStateMixin {
final _formKey = GlobalKey<FormState>();
final _customerNumberController = TextEditingController();
final _passwordController = TextEditingController();
bool _obscurePassword = true;
//bool _showWelcome = true;
late AnimationController _logoController;
late Animation<double> _logoAnimation;
@override
void initState() {
super.initState();
_logoController = AnimationController(
vsync: this,
duration: const Duration(seconds: 1),
)..repeat(reverse: true);
_logoAnimation = Tween<double>(begin: 0.2, end: 1).animate(_logoController);
}
@override
void dispose() {
_logoController.dispose();
_customerNumberController.dispose();
_passwordController.dispose();
super.dispose();
}
void _submitForm() {
if (_formKey.currentState!.validate()) {
context.read<AuthCubit>().login(
_customerNumberController.text.trim(),
_passwordController.text,
);
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
// appBar: AppBar(title: const Text('Login')),
body: BlocConsumer<AuthCubit, AuthState>(
listener: (context, state) async {
if (state is Authenticated) {
final storage = getIt<SecureStorage>();
final mpin = await storage.read('mpin');
if (mpin == null) {
Navigator.of(context).pushReplacement(
MaterialPageRoute(
builder: (_) => MPinScreen(
mode: MPinMode.set,
onCompleted: (_) {
Navigator.of(context, rootNavigator: true)
.pushReplacement(
MaterialPageRoute(
builder: (_) => const NavigationScaffold()),
);
},
),
),
);
} else {
Navigator.of(context).pushReplacement(
MaterialPageRoute(builder: (_) => const NavigationScaffold()),
);
}
} else if (state is AuthError) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text(state.message)),
);
}
},
builder: (context, state) {
return Padding(
padding: const EdgeInsets.all(24.0),
child: Form(
key: _formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
// 🔁 Animated Blinking Logo
FadeTransition(
opacity: _logoAnimation,
child: Image.asset(
'assets/images/logo.png',
width: 150,
height: 150,
errorBuilder: (context, error, stackTrace) {
return const Icon(Icons.account_balance,
size: 100, color: Colors.blue);
},
),
),
const SizedBox(height: 16),
// Title
const Text(
'KCCB',
style: TextStyle(
fontSize: 32,
fontWeight: FontWeight.bold,
color: Colors.blue),
),
const SizedBox(height: 48),
TextFormField(
controller: _customerNumberController,
decoration: const InputDecoration(
labelText: 'Customer Number',
// prefixIcon: Icon(Icons.person),
border: OutlineInputBorder(),
isDense: true,
filled: true,
fillColor: Colors.white,
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.black),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.black, width: 2),
),
),
keyboardType: TextInputType.number,
textInputAction: TextInputAction.next,
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please enter your username';
}
return null;
},
),
const SizedBox(height: 24),
// Password
TextFormField(
controller: _passwordController,
obscureText: _obscurePassword,
textInputAction: TextInputAction.done,
onFieldSubmitted: (_) =>
_submitForm(), // ⌨️ Enter key submits
decoration: InputDecoration(
labelText: 'Password',
border: const OutlineInputBorder(),
isDense: true,
filled: true,
fillColor: Colors.white,
enabledBorder: const OutlineInputBorder(
borderSide: BorderSide(color: Colors.black),
),
focusedBorder: const OutlineInputBorder(
borderSide: BorderSide(color: Colors.black, width: 2),
),
suffixIcon: IconButton(
icon: Icon(
_obscurePassword
? Icons.visibility
: Icons.visibility_off,
),
onPressed: () {
setState(() {
_obscurePassword = !_obscurePassword;
});
},
),
),
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please enter your password';
}
return null;
},
),
const SizedBox(height: 24),
//Login Button
SizedBox(
width: 250,
child: ElevatedButton(
onPressed: state is AuthLoading ? null : _submitForm,
style: ElevatedButton.styleFrom(
shape: const StadiumBorder(),
padding: const EdgeInsets.symmetric(vertical: 16),
backgroundColor: Colors.white,
foregroundColor: Colors.blueAccent,
side: const BorderSide(color: Colors.black, width: 1),
elevation: 0,
),
child: state is AuthLoading
? const CircularProgressIndicator()
: const Text(
"Login",
style: TextStyle(fontSize: 16),
),
),
),
const SizedBox(height: 15),
const Padding(
padding: EdgeInsets.symmetric(vertical: 16),
child: Row(
children: [
Expanded(child: Divider()),
Padding(
padding: EdgeInsets.symmetric(horizontal: 8),
child: Text('OR'),
),
Expanded(child: Divider()),
],
),
),
const SizedBox(height: 25),
// Register Button
SizedBox(
width: 250,
child: ElevatedButton(
//disable until registration is implemented
onPressed: null,
style: OutlinedButton.styleFrom(
shape: const StadiumBorder(),
padding: const EdgeInsets.symmetric(vertical: 16),
backgroundColor: Colors.lightBlue[100],
foregroundColor: Colors.black),
child: const Text('Register'),
),
),
],
),
),
);
},
),
);
}
}
/*import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:kmobile/di/injection.dart';
import 'package:kmobile/features/auth/screens/mpin_screen.dart';
import 'package:kmobile/security/secure_storage.dart';
import '../../../app.dart';
import '../controllers/auth_cubit.dart';
import '../controllers/auth_state.dart';
class LoginScreen extends StatefulWidget {
const LoginScreen({super.key});
@override
LoginScreenState createState() => LoginScreenState();
}
class LoginScreenState extends State<LoginScreen> {
final _formKey = GlobalKey<FormState>();
final _customerNumberController = TextEditingController();
final _passwordController = TextEditingController();
bool _obscurePassword = true;
@override
void dispose() {
_customerNumberController.dispose();
_passwordController.dispose();
super.dispose();
}
void _submitForm() {
if (_formKey.currentState!.validate()) {
context.read<AuthCubit>().login(
_customerNumberController.text.trim(),
_passwordController.text,
);
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
// appBar: AppBar(title: const Text('Login')),
body: BlocConsumer<AuthCubit, AuthState>(
listener: (context, state) async {
if (state is Authenticated) {
final storage = getIt<SecureStorage>();
final mpin = await storage.read('mpin');
if (mpin == null) {
Navigator.of(context).pushReplacement(
MaterialPageRoute(
builder: (_) => MPinScreen(
mode: MPinMode.set,
onCompleted: (_) {
Navigator.of(context, rootNavigator: true)
.pushReplacement(
MaterialPageRoute(
builder: (_) => const NavigationScaffold()),
);
},
),
),
);
} else {
Navigator.of(context).pushReplacement(
MaterialPageRoute(builder: (_) => const NavigationScaffold()),
);
}
} else if (state is AuthError) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text(state.message)),
);
}
},
builder: (context, state) {
return Padding(
padding: const EdgeInsets.all(24.0),
child: Form(
key: _formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Image.asset('assets/images/logo.png', width: 150, height: 150,
errorBuilder: (context, error, stackTrace) {
return const Icon(Icons.account_balance,
size: 100, color: Colors.blue);
}),
const SizedBox(height: 16),
// Title
const Text(
'KCCB',
style: TextStyle(
fontSize: 32,
fontWeight: FontWeight.bold,
color: Colors.blue),
),
const SizedBox(height: 48),
TextFormField(
controller: _customerNumberController,
decoration: const InputDecoration(
labelText: 'Customer Number',
// prefixIcon: Icon(Icons.person),
border: OutlineInputBorder(),
isDense: true,
filled: true,
fillColor: Colors.white,
enabledBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.black),
),
focusedBorder: OutlineInputBorder(
borderSide: BorderSide(color: Colors.black, width: 2),
),
),
keyboardType: TextInputType.number,
textInputAction: TextInputAction.next,
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please enter your username';
}
return null;
},
),
const SizedBox(height: 24),
TextFormField(
controller: _passwordController,
decoration: InputDecoration(
labelText: 'Password',
// prefixIcon: const Icon(Icons.lock),
border: const OutlineInputBorder(),
isDense: true,
filled: true,
fillColor: Colors.white,
enabledBorder: const OutlineInputBorder(
borderSide: BorderSide(color: Colors.black),
),
focusedBorder: const OutlineInputBorder(
borderSide: BorderSide(color: Colors.black, width: 2),
),
suffixIcon: IconButton(
icon: Icon(
_obscurePassword
? Icons.visibility
: Icons.visibility_off,
),
onPressed: () {
setState(() {
_obscurePassword = !_obscurePassword;
});
},
),
),
textInputAction: TextInputAction.done,
obscureText: _obscurePassword,
validator: (value) {
if (value == null || value.isEmpty) {
return 'Please enter your password';
}
return null;
},
),
const SizedBox(height: 24),
SizedBox(
width: 250,
child: ElevatedButton(
onPressed: state is AuthLoading ? null : _submitForm,
style: ElevatedButton.styleFrom(
shape: const StadiumBorder(),
padding: const EdgeInsets.symmetric(vertical: 16),
backgroundColor: Colors.white,
foregroundColor: Colors.blueAccent,
side: const BorderSide(color: Colors.black, width: 1),
elevation: 0),
child: state is AuthLoading
? const CircularProgressIndicator()
: const Text(
'Login',
style: TextStyle(fontSize: 16),
),
),
),
const SizedBox(height: 15),
const Padding(
padding: EdgeInsets.symmetric(vertical: 16),
child: Row(
children: [
Expanded(child: Divider()),
Padding(
padding: EdgeInsets.symmetric(horizontal: 8),
child: Text('OR'),
),
Expanded(child: Divider()),
],
),
),
const SizedBox(height: 25),
// Register Button
SizedBox(
width: 250,
child: ElevatedButton(
//disable until registration is implemented
onPressed: null,
style: OutlinedButton.styleFrom(
shape: const StadiumBorder(),
padding: const EdgeInsets.symmetric(vertical: 16),
backgroundColor: Colors.lightBlue[100],
foregroundColor: Colors.black),
child: const Text('Register'),
),
),
],
),
),
);
},
),
);
}
}
*/

249
lib/features/auth/screens/mpin_screen.dart Normal file
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import 'dart:developer';
import 'package:flutter/material.dart';
import 'package:kmobile/app.dart';
import 'package:kmobile/di/injection.dart';
import 'package:kmobile/security/secure_storage.dart';
import 'package:local_auth/local_auth.dart';
enum MPinMode { enter, set, confirm }
class MPinScreen extends StatefulWidget {
final MPinMode mode;
final String? initialPin;
final void Function(String pin)? onCompleted;
const MPinScreen({
super.key,
required this.mode,
this.initialPin,
this.onCompleted,
});
@override
State<MPinScreen> createState() => _MPinScreenState();
}
class _MPinScreenState extends State<MPinScreen> {
List<String> mPin = [];
String? errorText;
@override
void initState() {
super.initState();
if (widget.mode == MPinMode.enter) {
_tryBiometricBeforePin();
}
}
Future<void> _tryBiometricBeforePin() async {
final storage = getIt<SecureStorage>();
final enabled = await storage.read('biometric_enabled');
log('biometric_enabled: $enabled');
if (enabled != null && enabled) {
final auth = LocalAuthentication();
if (await auth.canCheckBiometrics) {
final didAuth = await auth.authenticate(
localizedReason: 'Authenticate to access kMobile',
options: const AuthenticationOptions(biometricOnly: true),
);
if (didAuth && mounted) {
// success → directly “complete” your flow
widget.onCompleted?.call('');
// or navigate yourself:
// Navigator.of(context).pushReplacement(
// MaterialPageRoute(builder: (_) => const NavigationScaffold()));
}
}
}
}
void addDigit(String digit) {
if (mPin.length < 4) {
setState(() {
mPin.add(digit);
errorText = null;
});
if (mPin.length == 4) {
_handleComplete();
}
}
}
void deleteDigit() {
if (mPin.isNotEmpty) {
setState(() {
mPin.removeLast();
errorText = null;
});
}
}
Future<void> _handleComplete() async {
final pin = mPin.join();
final storage = SecureStorage();
switch (widget.mode) {
case MPinMode.enter:
final storedPin = await storage.read('mpin');
log('storedPin: $storedPin');
if (storedPin == int.tryParse(pin)) {
widget.onCompleted?.call(pin);
} else {
setState(() {
errorText = "Incorrect mPIN. Try again.";
mPin.clear();
});
}
break;
case MPinMode.set:
// propagate parent onCompleted into confirm step
Navigator.push(
context,
MaterialPageRoute(
builder: (_) => MPinScreen(
mode: MPinMode.confirm,
initialPin: pin,
onCompleted: widget.onCompleted, // <-- use parent callback
),
),
);
break;
case MPinMode.confirm:
if (widget.initialPin == pin) {
// 1) persist the pin
await storage.write('mpin', pin);
// 3) now clear the entire navigation stack and go to your main scaffold
if (mounted) {
Navigator.of(context, rootNavigator: true).pushAndRemoveUntil(
MaterialPageRoute(builder: (_) => const NavigationScaffold()),
(route) => false,
);
}
} else {
setState(() {
errorText = "Pins do not match. Try again.";
mPin.clear();
});
}
break;
}
}
Widget buildMPinDots() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: List.generate(4, (index) {
return Container(
margin: const EdgeInsets.all(8),
width: 15,
height: 15,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: index < mPin.length ? Colors.black : Colors.grey[400],
),
);
}),
);
}
Widget buildNumberPad() {
List<List<String>> keys = [
['1', '2', '3'],
['4', '5', '6'],
['7', '8', '9'],
['Enter', '0', '<']
];
return Column(
children: keys.map((row) {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: row.map((key) {
return Padding(
padding: const EdgeInsets.all(8.0),
child: GestureDetector(
onTap: () {
if (key == '<') {
deleteDigit();
} else if (key == 'Enter') {
if (mPin.length == 4) {
_handleComplete();
} else {
setState(() {
errorText = "Please enter 4 digits";
});
}
} else if (key.isNotEmpty) {
addDigit(key);
}
},
child: Container(
width: 70,
height: 70,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.grey[200],
),
alignment: Alignment.center,
child: key == 'Enter'
? const Icon(Icons.check)
: Text(
key == '<' ? '⌫' : key,
style: TextStyle(
fontSize: 20,
color: key == 'Enter' ? Colors.blue : Colors.black,
),
),
),
),
);
}).toList(),
);
}).toList(),
);
}
String getTitle() {
switch (widget.mode) {
case MPinMode.enter:
return "Enter your mPIN";
case MPinMode.set:
return "Set your new mPIN";
case MPinMode.confirm:
return "Confirm your mPIN";
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Column(
children: [
const Spacer(),
// Logo
Image.asset('assets/images/logo.png', height: 100),
const SizedBox(height: 20),
Text(
getTitle(),
style: const TextStyle(fontSize: 20, fontWeight: FontWeight.w500),
),
const SizedBox(height: 20),
buildMPinDots(),
if (errorText != null)
Padding(
padding: const EdgeInsets.only(top: 8.0),
child:
Text(errorText!, style: const TextStyle(color: Colors.red)),
),
const Spacer(),
buildNumberPad(),
const Spacer(),
],
),
),
);
}
}

141
lib/features/auth/screens/welcome_screen.dart Normal file
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import 'package:flutter/material.dart';
import 'dart:async';
class WelcomeScreen extends StatefulWidget {
final VoidCallback onContinue;
const WelcomeScreen({super.key, required this.onContinue});
@override
State<WelcomeScreen> createState() => _WelcomeScreenState();
}
class _WelcomeScreenState extends State<WelcomeScreen> {
@override
void initState() {
super.initState();
// Automatically go to login after 6 seconds
Timer(const Duration(seconds: 6), () {
widget.onContinue();
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
/// 🔹 Background Image
Positioned.fill(
child: Image.asset(
'assets/images/kconnect2.webp',
fit: BoxFit.cover,
),
),
/// 🔹 Centered Text Overlay
Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: const [
Text(
'Kconnect',
style: TextStyle(
fontSize: 36,
fontWeight: FontWeight.bold,
color: Colors.white,
letterSpacing: 1.5,
),
),
SizedBox(height: 12),
Text(
'Kangra Central Co-operative Bank',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 18,
color: Colors.white,
letterSpacing: 1.2,
),
),
],
),
),
/// 🔹 Loading Spinner at Bottom
const Positioned(
bottom: 40,
left: 0,
right: 0,
child: Center(
child: CircularProgressIndicator(
color: Colors.white,
),
),
),
],
),
);
}
}
/*import 'package:flutter/material.dart';
class WelcomeScreen extends StatelessWidget {
final VoidCallback onContinue;
const WelcomeScreen({super.key, required this.onContinue});
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
body: Center(
child: Padding(
padding: const EdgeInsets.all(32.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Spacer(),
const Text(
'Welcome to',
style: TextStyle(fontSize: 28, color: Colors.black87),
),
const SizedBox(height: 10),
const Text(
'KCCB',
style: TextStyle(
fontSize: 42,
fontWeight: FontWeight.bold,
color: Colors.indigo,
),
),
const SizedBox(height: 40),
Image.asset(
'assets/images/logo.png',
width: 150,
height: 150,
),
const Spacer(),
ElevatedButton(
onPressed: onContinue,
style: ElevatedButton.styleFrom(
backgroundColor: Colors.indigo,
foregroundColor: Colors.white,
padding:
const EdgeInsets.symmetric(horizontal: 28, vertical: 20),
),
child: const Text('Proceed to Login'),
),
const SizedBox(height: 24),
],
),
),
),
);
}
}
*/