index.js

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

const client = new Discord.Client()

const owner = "93034899488899072"

client.on('ready', () => {
	console.log('This voice bar thing ready')
})

client.on('message', msg => {
	if(msg.author.id != owner) return

	if(msg.content.startsWith('ping')) {
		msg.reply('pong')
	}
})

client.on('voiceStateUpdate', async (before, after) => {
	const guild = after.guild

	if(guild.id != '444793783259889676' && guild.id != '311805678324940821') return

	const beforeName = before.voiceChannel ? before.voiceChannel.name : undefined
	const afterName = after.voiceChannel ? after.voiceChannel.name : undefined

	if(beforeName === afterName) return

	if(beforeName) {
		// If role doesn't exist, create role.
		let foundRole = guild.roles.find('name', beforeName)
		if(!foundRole) {
			let role = await guild.createRole({
				name: beforeName,
				color: 'WHITE'
			})

			const textChannel = guild.channels.find('name', beforeName+'-text')
			if(role && textChannel) {
				assignPermissions(role, textChannel)
				foundRole = role
				console.log('Created role', role.name)
			}
		}
		
		//Remove role from user who just left
		before.removeRole(foundRole)
		console.log('Removed', foundRole.name, 'from user', before.displayName)
	}

	if(afterName) {
		let foundRole = guild.roles.find('name', afterName)
		after.addRole(foundRole)
		console.log('Added', foundRole.name, 'to user', after.displayName)
	}
})

function assignPermissions(role, channel) {
	channel.overwritePermissions(role, {
		VIEW_CHANNEL: true,
		SEND_MESSAGES: true
	})
	.catch(console.error)
}

client.login(config.token)