122 lines
3.6 KiB
Dart
122 lines
3.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:jwt_decoder/jwt_decoder.dart';
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import 'package:sheetless/api.dart';
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import 'package:sheetless/home_page.dart';
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import 'package:sheetless/storage_helper.dart';
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class LoginPage extends StatefulWidget {
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const LoginPage({super.key});
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@override
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State<LoginPage> createState() => _LoginPageState();
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}
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class _LoginPageState extends State<LoginPage> {
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final TextEditingController _urlController = TextEditingController();
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final TextEditingController _emailController = TextEditingController();
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final TextEditingController _passwordController = TextEditingController();
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final StorageHelper _storageHelper = StorageHelper();
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String? _error;
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@override
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void initState() {
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super.initState();
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_checkJwtValidity();
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}
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Future<void> _checkJwtValidity() async {
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final jwt = await _storageHelper.read(StorageKey.jwt);
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if (jwt != null) {
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final isValid = await _validateJwt(jwt);
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if (isValid) {
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_navigateToMainPage();
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return;
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} else {
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final url = await _storageHelper.read(StorageKey.url);
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final email = await _storageHelper.read(StorageKey.email);
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final password = await _storageHelper.read(StorageKey.password);
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if (url != null && email != null && password != null) {
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_login(url, email, password);
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}
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}
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}
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}
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Future<bool> _validateJwt(String jwt) async {
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try {
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bool expired = JwtDecoder.isExpired(jwt);
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return !expired;
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} on FormatException {
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return false;
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}
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}
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Future<void> _login(String serverUrl, String email, String password) async {
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setState(() {
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_error = null;
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});
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final apiClient = ApiClient(baseUrl: serverUrl);
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final loginSuccessful = await apiClient.login(email, password);
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if (loginSuccessful) {
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await _storageHelper.write(StorageKey.url, serverUrl);
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await _storageHelper.write(StorageKey.jwt, apiClient.token!);
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await _storageHelper.write(StorageKey.email, email);
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await _storageHelper.write(StorageKey.password, password);
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_navigateToMainPage();
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} else {
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// TODO: give more varied error messages
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setState(() {
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_error = "Login failed.";
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});
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}
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}
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void _navigateToMainPage() {
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Navigator.of(context).pushReplacement(
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MaterialPageRoute(builder: (_) => MyHomePage()),
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);
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: Text('Login')),
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body: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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TextField(
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controller: _urlController,
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decoration: InputDecoration(labelText: 'Url'),
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),
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TextField(
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controller: _emailController,
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decoration: InputDecoration(labelText: 'Email'),
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),
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TextField(
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controller: _passwordController,
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decoration: InputDecoration(labelText: 'Password'),
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obscureText: true,
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),
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if (_error != null)
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Padding(
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padding: const EdgeInsets.only(top: 8.0),
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child: Text(_error!, style: TextStyle(color: Colors.red)),
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),
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SizedBox(height: 16),
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ElevatedButton(
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onPressed: () {
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_login(_urlController.text, _emailController.text,
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_passwordController.text);
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},
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child: Text('Login'),
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),
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],
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),
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),
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);
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}
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}
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