amazon_cognito_identity_dart 0.0.9+1 
amazon_cognito_identity_dart: ^0.0.9+1 copied to clipboard
Unofficial Amazon Cognito Identity Provider Dart SDK, to easily add user sign-up and sign-in to your mobile and web apps with AWS Cloud Services.
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:amazon_cognito_identity_dart/cognito.dart';
// Setup AWS User Pool Id & Client Id settings here:
const _awsUserPoolId = 'ap-southeast-1_xxxxxxxxx';
const _awsClientId = 'xxxxxxxxxxxxxxxxxxxxxxxxxx';
final userPool = new CognitoUserPool(_awsUserPoolId, _awsClientId);
void main() => runApp(new SecureCounterApp());
class User {
String name = '';
String email = '';
String password = '';
bool userConfirmed = false;
bool isAuthenticated = false;
getUserAttributes() async {
List<CognitoUserAttribute> attributes;
final user = await userPool.getCurrentUser();
await user.getSession();
attributes = await user.getUserAttributes();
if (attributes != null) {
attributes.forEach((attribute) {
if (attribute.getName() == 'email') {
email = attribute.getValue();
} else if (attribute.getName() == 'name') {
name = attribute.getValue();
}
});
}
}
Future<bool> authenticated() async {
CognitoUserSession session;
try {
final cognitoUser = await userPool.getCurrentUser();
if (cognitoUser == null) {
return false;
}
session = await cognitoUser.getSession();
} catch (e) {
throw e;
}
isAuthenticated = false;
if (session.isValid()) {
isAuthenticated = true;
}
return isAuthenticated;
}
Future<String> signUp() async {
CognitoUserPoolData data;
try {
final userAttributes = [
new AttributeArg(name: 'name', value: name),
];
data = await userPool.signUp(this.email, this.password,
userAttributes: userAttributes);
} on CognitoClientException catch (e) {
if (e.code == 'UsernameExistsException' ||
e.code == 'InvalidParameterException') {
return e.message;
}
throw e;
}
userConfirmed = data.userConfirmed;
if (userConfirmed == false) {
return 'Please confirm your email';
}
return 'User successfully created';
}
signOut() async {
final cognitoUser = await userPool.getCurrentUser();
if (cognitoUser != null) {
return cognitoUser.signOut();
}
}
Future<String> confirmAccount(String confirmationCode) async {
final cognitoUser = new CognitoUser(email, userPool);
String result;
try {
result = await cognitoUser.confirmRegistration(confirmationCode);
} on CognitoClientException catch (e) {
if (e.code == 'InvalidParameterException' ||
e.code == 'CodeMismatchException' ||
e.code == 'NotAuthorizedException' ||
e.code == 'UserNotFoundException') {
return e.message;
}
throw e;
}
return result;
}
Future<String> resendConfirmationCode() async {
final cognitoUser = new CognitoUser(email, userPool);
String result;
try {
result = await cognitoUser.resendConfirmationCode();
} on CognitoClientException catch (e) {
if (e.code == 'LimitExceededException' ||
e.code == 'InvalidParameterException') {
return e.message;
}
throw e;
}
return result;
}
Future<String> login() async {
final cognitoUser = new CognitoUser(email, userPool);
final authDetails = new AuthenticationDetails(
username: email,
password: password,
);
CognitoUserSession session;
try {
session = await cognitoUser.authenticateUser(authDetails);
} on CognitoClientException catch (e) {
if (e.code == 'InvalidParameterException' ||
e.code == 'UserNotConfirmedException' ||
e.code == 'NotAuthorizedException') {
return e.message;
}
throw e;
}
if (!session.isValid()) {
return 'Invalid login';
}
isAuthenticated = true;
return 'Successfully logged in!';
}
}
class SecureCounterApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Cognito Dart',
theme: new ThemeData(
primarySwatch: Colors.orange,
),
home: HomePage(title: 'Cognito Dart Demo'),
);
}
}
class HomePage extends StatefulWidget {
HomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_HomePageState createState() => new _HomePageState();
}
class _HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
final Size screenSize = MediaQuery.of(context).size;
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Center(
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Container(
padding:
new EdgeInsets.only(left: 20.0, right: 20.0, bottom: 20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Sign Up',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new SignUpScreen()),
);
},
color: Colors.blue,
),
),
new Container(
padding:
new EdgeInsets.only(left: 20.0, right: 20.0, bottom: 20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Confirm Account',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new ConfirmationScreen()),
);
},
color: Colors.blue,
),
),
new Container(
padding:
new EdgeInsets.only(left: 20.0, right: 20.0, bottom: 20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Login',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new LoginScreen()),
);
},
color: Colors.blue,
),
),
new Container(
padding:
new EdgeInsets.only(left: 20.0, right: 20.0, bottom: 20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Secure Counter',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) => new SecureCounterScreen()),
);
},
color: Colors.blue,
),
),
],
),
),
);
}
}
class SignUpScreen extends StatefulWidget {
@override
_SignUpScreenState createState() => new _SignUpScreenState();
}
class _SignUpScreenState extends State<SignUpScreen> {
final GlobalKey<FormState> _formKey = new GlobalKey<FormState>();
final userData = new User();
void submit(BuildContext context) async {
_formKey.currentState.save();
String message;
try {
message = await userData.signUp();
} catch (e) {
message = 'Unknown error occurred';
}
final snackBar = new SnackBar(
content: new Text(message),
action: new SnackBarAction(
label: 'OK',
onPressed: () {
if (!userData.userConfirmed) {
Navigator.pop(context);
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) =>
new ConfirmationScreen(email: userData.email)),
);
}
},
),
duration: new Duration(seconds: 30),
);
Scaffold.of(context).showSnackBar(snackBar);
}
@override
Widget build(BuildContext context) {
final Size screenSize = MediaQuery.of(context).size;
return new Scaffold(
appBar: new AppBar(
title: new Text('Sign Up'),
),
body: new Builder(
builder: (BuildContext context) {
return new Container(
child: new Form(
key: _formKey,
child: new ListView(
children: <Widget>[
new ListTile(
leading: const Icon(Icons.account_box),
title: new TextFormField(
decoration: new InputDecoration(labelText: 'Name'),
onSaved: (String name) {
userData.name = name;
},
),
),
new ListTile(
leading: const Icon(Icons.email),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'example@inspire.my', labelText: 'Email'),
keyboardType: TextInputType.emailAddress,
onSaved: (String email) {
userData.email = email;
},
),
),
new ListTile(
leading: const Icon(Icons.lock),
title: new TextFormField(
decoration: new InputDecoration(
hintText: 'Password!',
),
obscureText: true,
onSaved: (String password) {
userData.password = password;
},
),
),
new Container(
padding: new EdgeInsets.all(20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Sign Up',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
submit(context);
},
color: Colors.blue,
),
margin: new EdgeInsets.only(
top: 10.0,
),
),
],
),
),
);
},
),
);
}
}
class ConfirmationScreen extends StatefulWidget {
ConfirmationScreen({Key key, this.email}) : super(key: key);
final String email;
@override
_ConfirmationScreenState createState() => new _ConfirmationScreenState();
}
class _ConfirmationScreenState extends State<ConfirmationScreen> {
final GlobalKey<FormState> _formKey = new GlobalKey<FormState>();
String confirmationCode;
final userData = new User();
_submit(BuildContext context) async {
_formKey.currentState.save();
String message;
try {
message = await userData.confirmAccount(confirmationCode);
} catch (e) {
message = 'Unknown error occurred';
}
final snackBar = new SnackBar(
content: new Text(message),
action: new SnackBarAction(
label: 'OK',
onPressed: () {
if (message == 'SUCCESS') {
Navigator.pop(context);
Navigator.push(
context,
new MaterialPageRoute(
builder: (context) =>
new LoginScreen(email: userData.email)),
);
}
},
),
duration: new Duration(seconds: 30),
);
Scaffold.of(context).showSnackBar(snackBar);
}
_resendConfirmation(BuildContext context) async {
_formKey.currentState.save();
String message;
try {
message = await userData.resendConfirmationCode();
} catch (e) {
message = 'Unknown error occurred';
}
final snackBar = new SnackBar(
content: new Text(message),
action: new SnackBarAction(
label: 'OK',
onPressed: () {},
),
duration: new Duration(seconds: 30),
);
Scaffold.of(context).showSnackBar(snackBar);
}
@override
Widget build(BuildContext context) {
final Size screenSize = MediaQuery.of(context).size;
return new Scaffold(
appBar: new AppBar(
title: new Text('Confirm Account'),
),
body: new Builder(
builder: (BuildContext context) => new Container(
child: new Form(
key: _formKey,
child: new ListView(
children: <Widget>[
new ListTile(
leading: const Icon(Icons.email),
title: new TextFormField(
initialValue: widget.email,
decoration: new InputDecoration(
hintText: 'example@inspire.my', labelText: 'Email'),
keyboardType: TextInputType.emailAddress,
onSaved: (String email) {
userData.email = email;
},
),
),
new ListTile(
leading: const Icon(Icons.lock),
title: new TextFormField(
decoration:
new InputDecoration(labelText: 'Confirmation Code'),
onSaved: (String code) {
confirmationCode = code;
},
),
),
new Container(
padding: new EdgeInsets.all(20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Submit',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
_submit(context);
},
color: Colors.blue,
),
margin: new EdgeInsets.only(
top: 10.0,
),
),
new Center(
child: new InkWell(
child: new Text(
'Resend Confirmation Code',
style: new TextStyle(color: Colors.blueAccent),
),
onTap: () {
_resendConfirmation(context);
},
),
),
],
),
),
)
),
);
}
}
class LoginScreen extends StatefulWidget {
LoginScreen({Key key, this.email}) : super(key: key);
final String email;
@override
_LoginScreenState createState() => new _LoginScreenState();
}
class _LoginScreenState extends State<LoginScreen> {
final GlobalKey<FormState> _formKey = new GlobalKey<FormState>();
final userData = new User();
submit(BuildContext context) async {
_formKey.currentState.save();
String message;
try {
message = await userData.login();
} catch (e) {
message = 'An unknown error occurred';
}
final snackBar = new SnackBar(
content: new Text(message),
action: new SnackBarAction(
label: 'OK',
onPressed: () {
if (userData.isAuthenticated) {
Navigator.pop(context);
}
},
),
duration: new Duration(seconds: 30),
);
Scaffold.of(context).showSnackBar(snackBar);
}
@override
Widget build(BuildContext context) {
final Size screenSize = MediaQuery.of(context).size;
return new Scaffold(
appBar: new AppBar(
title: new Text('Login'),
),
body: new Builder(
builder: (BuildContext context) {
return new Container(
child: new Form(
key: _formKey,
child: new ListView(
children: <Widget>[
new ListTile(
leading: const Icon(Icons.email),
title: new TextFormField(
initialValue: widget.email,
decoration: new InputDecoration(
hintText: 'example@inspire.my', labelText: 'Email'),
keyboardType: TextInputType.emailAddress,
onSaved: (String email) {
userData.email = email;
},
),
),
new ListTile(
leading: const Icon(Icons.lock),
title: new TextFormField(
decoration:
new InputDecoration(labelText: 'Password'),
obscureText: true,
onSaved: (String password) {
userData.password = password;
},
),
),
new Container(
padding: new EdgeInsets.all(20.0),
width: screenSize.width,
child: new RaisedButton(
child: new Text(
'Login',
style: new TextStyle(color: Colors.white),
),
onPressed: () {
submit(context);
},
color: Colors.blue,
),
margin: new EdgeInsets.only(
top: 10.0,
),
),
],
),
),
);
},
),
);
}
}
class SecureCounterScreen extends StatefulWidget {
SecureCounterScreen({Key key}) : super(key: key);
@override
_SecureCounterScreenState createState() => new _SecureCounterScreenState();
}
class _SecureCounterScreenState extends State<SecureCounterScreen> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
Future<User> _getAuthenticatedUser() async {
final user = new User();
try {
await user.authenticated();
} catch (e) {
return null;
}
if (user.isAuthenticated) {
await user.getUserAttributes();
return user;
}
return user;
}
@override
Widget build(BuildContext context) {
return new FutureBuilder(
future: _getAuthenticatedUser(),
builder: (context, AsyncSnapshot<User> snapshot) {
if (snapshot.hasData) {
if (!snapshot.data.isAuthenticated) {
return new LoginScreen();
}
return new Scaffold(
appBar: new AppBar(
title: new Text('Secure Counter'),
),
body: new Center(
child: new Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
new Text(
'Welcome ${snapshot.data.name}!',
style: Theme.of(context).textTheme.display1,
),
new Divider(),
new Text(
'You have pushed the button this many times:',
),
new Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
new Divider(),
new Center(
child: new InkWell(
child: new Text(
'Logout',
style: new TextStyle(color: Colors.blueAccent),
),
onTap: () {
snapshot.data.signOut();
Navigator.pop(context);
},
),
),
],
),
),
floatingActionButton: new FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: new Icon(Icons.add),
),
);
}
return new Scaffold(appBar: new AppBar(title: new Text('Loading...')));
}
);
}
}Metadata
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Metadata
Unofficial Amazon Cognito Identity Provider Dart SDK, to easily add user sign-up and sign-in to your mobile and web apps with AWS Cloud Services.
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