Discord.js XP系统，将角色添加为更高级别的成员

const Discord = require('discord.js');
const client = new Discord.Client();
const xp = new Map();

client.on('ready', () => {
    console.log(`Logged in as ${client.user.tag}!`);
});

client.on('message', async message => {
    if (message.author.bot) return;

    // 给予 XP
    if (!xp.has(message.author.id)) {
        xp.set(message.author.id, 0);
    }
    const userXP = xp.get(message.author.id);
    const newXp = userXP + 10;
    xp.set(message.author.id, newXp);

    // 检查等级并分配角色
    const level = Math.floor(Math.sqrt(newXp));
    const role = message.guild.roles.cache.find(r => r.name === `Level ${level}`);
    if (role && !message.member.roles.cache.has(role.id)) {
        await message.member.roles.add(role);
    }

    // 发送 XP 更新消息
    message.reply(`You gained 10 XP! You now have ${newXp} XP and are at Level ${level}.`);
});

client.login('YOUR_BOT_TOKEN');