// 获取浏览器信息
const userAgent = navigator.userAgent;
const screenWidth = window.screen.width;
const screenHeight = window.screen.height;
const language = navigator.language;

// 获取地理位置（需要用户授权）
navigator.geolocation.getCurrentPosition(position => {
  const { latitude, longitude } = position.coords;
  console.log(`用户位置: 纬度 ${latitude}, 经度 ${longitude}`);
});

const express = require('express');
const jwt = require('jsonwebtoken');
const app = express();

// 模拟用户数据库
const users = [
  { id: 1, username: 'user1', email: 'user1@example.com', role: 'admin' }
];

// 中间件：验证JWT令牌
function authenticateToken(req, res, next) {
  const authHeader = req.headers['authorization'];
  const token = authHeader && authHeader.split(' ')[1];
  
  if (!token) return res.sendStatus(401);

  jwt.verify(token, 'your-secret-key', (err, user) => {
    if (err) return res.sendStatus(403);
    req.user = user;
    next();
  });
}

// 获取当前用户信息的路由
app.get('/api/user/me', authenticateToken, (req, res) => {
  const user = users.find(u => u.id === req.user.id);
  if (!user) return res.status(404).send('用户不存在');
  
  res.json({
    id: user.id,
    username: user.username,
    email: user.email,
    role: user.role
    // 其他用户信息...
  });
});

app.listen(3000, () => console.log('服务器运行中...'));

CREATE TABLE users (
  id INT PRIMARY KEY AUTO_INCREMENT,
  username VARCHAR(50) UNIQUE NOT NULL,
  email VARCHAR(100) UNIQUE NOT NULL,
  password_hash VARCHAR(255) NOT NULL,
  first_name VARCHAR(50),
  last_name VARCHAR(50),
  phone VARCHAR(20),
  avatar_url VARCHAR(255),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  last_login TIMESTAMP,
  is_active BOOLEAN DEFAULT TRUE
);