index.js

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

const bot = new Discord.Client();

const fs = require("fs");
bot.commands = new Discord.Collection();
bot.aliases = new Discord.Collection();

// register command
fs.readdir("./commands/", (err, files) => {

    if(err) console.log(err)

    let jsfile = files.filter(f => f.split(".").pop() === "js") 
    if(jsfile.length <= 0) {
         return console.log("No commands found");
    }

    jsfile.forEach((f, i) => {
        let pull = require(`./commands/${f}`);
        bot.commands.set(pull.config.name, pull);  
        console.log("command " + botsettings.prefix + pull.config.name + " loaded")
        pull.config.aliases.forEach(alias => {
            bot.aliases.set(alias, pull.config.name)
            console.log(`new alias loaded for ${botsettings.prefix + pull.config.name} (${botsettings.prefix + alias})`)
        });
    });
});

// register events
fs.readdir("./events/", (err, files) => {

    if(err) console.log(err)

    let jsfile = files.filter(f => f.split(".").pop() === "js") 
    if(jsfile.length <= 0) {
         return console.log("No events found");
    }
    jsfile.forEach((f, i) => {
       require(`./events/${f}`);
       console.log(`Event ${f} loaded`)
    });
});


// commandhandler
bot.on("message", async message => {
    if(message.author.bot || message.channel.type === "dm") return;

    let prefix = botsettings.prefix;
    let messageArray = message.content.split(" ");
    let cmd = messageArray[0];
    let args = messageArray.slice(1);

    if(!message.content.startsWith(prefix)) return;
    let commandfile = bot.commands.get(cmd.slice(prefix.length)) || bot.commands.get(bot.aliases.get(cmd.slice(prefix.length)))
    if(commandfile) commandfile.run(bot,message,args)

})

bot.login(botsettings.token);