app.js

const { prefix, token } = require("./config.json");
const fs = require("fs");
const { Client, Collection, GatewayIntentsString, Partials} = require('discord.js');
const bot = new Client({
    intents: [
        GatewayIntentsString.Guilds,
        GatewayIntentsString.GuildMembers,
        GatewayIntentsString.GuildMessages,
        GatewayIntentsString.MessageContent,
    ],
    partials: [
        Partials.Channel,
        Partials.Message,
        Partials.User
    ]
});

// Create a collection to store commands inside the bot object
bot.commands = new Collection();

// Load Command files from commands folder
const commandFiles = fs.readdirSync('./commands/').filter(f => f.endsWith('.js'))
for (const file of commandFiles) {
    const props = require(`./commands/${file}`)
    console.log(`${file} loaded`)
    bot.commands.set(props.config.name, props)
}
// Get folders inside commands folder
const commandSubFolders = fs.readdirSync('./commands/').filter(f => !f.endsWith('.js'))
// Load Command files from subfolders inside commands folder
commandSubFolders.forEach(folder => {
    const commandFiles = fs.readdirSync(`./commands/${folder}/`).filter(f => f.endsWith('.js'))
    for (const file of commandFiles) {
        const props = require(`./commands/${folder}/${file}`)
        console.log(`${file} loaded from ${folder}`)
        bot.commands.set(props.config.name, props)
    }
});
// Load Event files from events folder
const eventFiles = fs.readdirSync('./events/').filter(f => f.endsWith('.js'))
for (const file of eventFiles) {
    const event = require(`./events/${file}`)
    if(event.once) {
        bot.once(event.name, (...args) => event.execute(...args, bot))
    } else {
        bot.on(event.name, (...args) => event.execute(...args, bot))
    }
}

// Run when bot receives messageCreate event and then run checks to see if the message is a command
bot.on("messageCreate", async message => {
    // Check if author is a bot or the message was sent in dms and return
    if(message.author.bot) return;
    if(message.channel.type === "dm") return;

    // Get prefix from config and prepare message so it is forwarded correctly to the command
    let messageArray = message.content.split(" ");
    let cmd = messageArray[0];
    let args = messageArray.slice(1);

    // Check that the message starts with the prefix and return if it does not
    if(!cmd.startsWith(prefix)) return;

    // Get command from command collection and run it
    let commandfile = bot.commands.get(cmd.slice(prefix.length));
    if(commandfile) commandfile.run(bot,message,args);

});

// Token needed in config.json
bot.login(token);