gobang/lib/pages/login_page.dart

import 'package:flutter/material.dart';
import 'package:gobang/service/user_dao.dart';

/// Description: login page
/// Time       : 02/20/2024 Tuesday
/// Author     : liuyuqi.gov@msn.cn
class LoginPage extends StatefulWidget {
  const LoginPage({Key? key}) : super(key: key);

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  TextEditingController userNameController = TextEditingController();
  TextEditingController passwordController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(children: [
        TextFormField(
          controller: userNameController,
          decoration: const InputDecoration(
            hintText: "请输入用户名",
          ),
          validator: (v) {
            if (v == null) {
              return "用户名不能为空";
            } else {
              return v.trim().isNotEmpty ? null : "用户名不能为空";
            }
          },
        ),
        TextFormField(
          controller: passwordController,
          decoration: const InputDecoration(
            hintText: "请输入密码",
          ),
          obscureText: true,
          validator: (v) {
            if (v == null) {
              return "密码不能为空";
            } else {
              return v.trim().length > 6 ? null : "密码不能少于6位";
            }
          },
        ),
        ElevatedButton(
          onPressed: () {
            Navigator.of(context).pushNamedAndRemoveUntil(
              "/",
              (Route<dynamic> route) => false,
            );
          },
          child: const Text("登录"),
        ),
      ]),
    );
  }

  /// login
  void login() async {
    if (Form.of(context).validate()) {
      await UserDao.login(userNameController.text, passwordController.text);
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text("用户名或密码错误"),
        ),
      );
    }
  }
}