172 lines
6.5 KiB
Dart
172 lines
6.5 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:shadcn_ui/shadcn_ui.dart';
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import 'package:provider/provider.dart';
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import '../../../providers/auth_provider.dart';
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import 'register_page.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 formKey = GlobalKey<ShadFormState>();
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@override
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Widget build(BuildContext context) {
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final theme = ShadTheme.of(context);
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return Scaffold(
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body: Center(
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child: ConstrainedBox(
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constraints: const BoxConstraints(maxWidth: 400),
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child: Padding(
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padding: const EdgeInsets.all(24),
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child: ShadForm(
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key: formKey,
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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// Logo 和标题
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Icon(
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LucideIcons.trendingUp,
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size: 64,
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color: theme.colorScheme.primary,
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),
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const SizedBox(height: 24),
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Text(
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'模拟所',
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style: theme.textTheme.h1,
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 8),
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Text(
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'虚拟货币模拟交易平台',
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style: theme.textTheme.muted,
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 48),
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// 用户名输入
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ShadInputFormField(
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id: 'username',
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label: const Text('用户名'),
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placeholder: const Text('请输入用户名'),
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leading: const Icon(LucideIcons.user),
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validator: (value) {
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if (value == null || value.isEmpty) {
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return '请输入用户名';
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}
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if (value.length < 3) {
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return '用户名至少 3 个字符';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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// 密码输入
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ShadInputFormField(
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id: 'password',
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label: const Text('密码'),
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placeholder: const Text('请输入密码'),
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obscureText: true,
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leading: const Icon(LucideIcons.lock),
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validator: (value) {
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if (value == null || value.isEmpty) {
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return '请输入密码';
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}
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if (value.length < 6) {
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return '密码至少 6 个字符';
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}
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return null;
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},
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),
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const SizedBox(height: 24),
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// 登录按钮
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Consumer<AuthProvider>(
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builder: (context, auth, _) {
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return ShadButton(
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onPressed: auth.isLoading
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? null
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: () async {
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if (formKey.currentState!.saveAndValidate()) {
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final values = formKey.currentState!.value;
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final response = await auth.login(
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values['username'],
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values['password'],
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);
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// 登录成功后，Provider 会自动更新状态
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// MaterialApp 的 Consumer 会自动切换到 MainPage
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if (!response.success && mounted) {
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// 只在失败时显示错误
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showShadDialog(
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context: context,
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builder: (context) => ShadDialog.alert(
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title: const Text('登录失败'),
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description: Text(
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response.message ?? '用户名或密码错误',
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),
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actions: [
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ShadButton(
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child: const Text('确定'),
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onPressed: () =>
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Navigator.of(context).pop(),
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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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child: auth.isLoading
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? const SizedBox.square(
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dimension: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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color: Colors.white,
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),
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)
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: const Text('登录'),
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);
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},
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),
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const SizedBox(height: 16),
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// 注册链接
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(
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'还没有账号？',
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style: theme.textTheme.muted,
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),
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ShadButton.link(
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onPressed: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => RegisterPage(),
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),
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);
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},
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child: const Text('立即注册'),
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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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),
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),
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);
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}
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}
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