bot.js

const Discord = require('discord.js');
const config = require('./config.json');
const fs = require('fs');

const client = new Discord.Client();
client.commands = new Discord.Collection();

const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));

client.once('ready', () => {
    console.log('Online.');
});

for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    client.commands.set(command.name, command);
}

client.on('message', message => {
    if (message.author.bot || message.channel.type != 'text' || !message.content.startsWith('?')) return;
//    if (message.channel.author.role.id);
    
    const args = message.content.slice(config.prefix.length).split(' ');
    const command = args.shift().toLowerCase();

    if (!client.commands.has(command)) return;

    try {
        client.commands.get(command).execute(message, args);
    } catch (error) {
        console.error(error);
        message.reply(`There was an error trying to execute command: ${command}`);
    }
});

client.login(config.token);