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import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:beam_messenger/auth.dart';
import 'package:beam_messenger/data/database_helper.dart';
import 'package:beam_messenger/models/user.dart';
import 'package:beam_messenger/screens/login/login_screen_presenter.dart';
class LoginScreen extends StatefulWidget {
@override
State<StatefulWidget> createState() {
return new LoginScreenState();
}
}
class LoginScreenState extends State<LoginScreen>
implements LoginScreenContract, AuthStateListener {
BuildContext _ctx;
bool _isLoading = false;
final formKey = new GlobalKey<FormState>();
final scaffoldKey = new GlobalKey<ScaffoldState>();
String _password, _email;
LoginScreenPresenter _presenter;
LoginScreenState() {
_presenter = new LoginScreenPresenter(this);
var authStateProvider = new AuthStateProvider();
authStateProvider.subscribe(this);
}
void _submit() {
final form = formKey.currentState;
if (form.validate()) {
setState(() => _isLoading = true);
form.save();
_presenter.doLogin(_email, _password);
}
}
void _showSnackBar(String text) {
scaffoldKey.currentState
.showSnackBar(new SnackBar(content: new Text(text)));
}
@override
onAuthStateChanged(AuthState state) {
if (state == AuthState.LOGGED_IN)
Navigator.of(_ctx).pushReplacementNamed("/home");
}
@override
Widget build(BuildContext context) {
_ctx = context;
var loginBtn = new RaisedButton(
onPressed: _submit,
child: new Text("LOGIN"),
color: Colors.primaries[0],
);
var loginForm = new Column(
children: <Widget>[
new Text(
"Login",
textScaleFactor: 2.0,
),
new Form(
key: formKey,
child: new Column(
children: <Widget>[
new Padding(
padding: const EdgeInsets.all(8.0),
child: new TextFormField(
onSaved: (val) => _email = val,
validator: (val) {
return val.length < 10
? "email must have atleast 10 chars"
: null;
},
decoration: new InputDecoration(labelText: "email"),
),
),
new Padding(
padding: const EdgeInsets.all(8.0),
child: new TextFormField(
onSaved: (val) => _password = val,
decoration: new InputDecoration(labelText: "Password"),
),
),
],
),
),
_isLoading ? new CircularProgressIndicator() : loginBtn
],
crossAxisAlignment: CrossAxisAlignment.center,
);
return new Scaffold(
appBar: null,
key: scaffoldKey,
body: new Container(
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage("assets/login_background.jpg"),
fit: BoxFit.cover),
),
child: new Center(
child: new ClipRect(
child: new BackdropFilter(
filter: new ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
child: new Container(
child: loginForm,
height: 300.0,
width: 300.0,
decoration: new BoxDecoration(
color: Colors.grey.shade200.withOpacity(0.5)),
),
),
),
),
),
);
}
@override
void onLoginError(String errorTxt) {
_showSnackBar(errorTxt);
setState(() => _isLoading = false);
}
@override
void onLoginSuccess(User user) async {
_showSnackBar(user.toString());
setState(() => _isLoading = false);
var db = new DatabaseHelper();
await db.saveUser(user);
var authStateProvider = new AuthStateProvider();
authStateProvider.notify(AuthState.LOGGED_IN);
}
}
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