index.js

require('dotenv').config();

const discord = require('discord.js');
const fs = require('fs');

const client = new discord.Client();

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

const modules = fs.readdirSync(`${__dirname}/modules`).map(module => {
  console.log(`Loading module: ${module}`);
  return require(`./modules/${module}`);
});

modules.forEach(module => module(client));

console.log(`Loaded ${modules.length} modules`);

client
  .login(process.env.DISCORD_BOT_TOKEN)
  .then(() => console.log('✅ Ready'))
  .catch(console.error);

registerShutdownHooks(client);

function registerShutdownHooks(client) {
  const signals = {
    SIGHUP: 1,
    SIGINT: 2,
    SIGTERM: 15,
  };

  function shutdown(signal, value) {
    console.log('Shutting down...');
    client.destroy();
    console.log(`Client stopped by ${signal} with value ${value}`);
    process.exit(128 + value);
  }

  Object.keys(signals).forEach(signal => {
    process.on(signal, () => {
      console.log(`Process received a ${signal} signal`);
      shutdown(signal, signals[signal]);
    });
  });
}