Haha-Yes/event/listeners/guildMemberAdd.js

const { Listener } = require('discord-akairo');
const fs = require('fs');
const rand = require('../../rand.js');

class guildMemberAddListener extends Listener {
	constructor() {
		super('guildMemberAdd', {
			emitter: 'client',
			event: 'guildMemberAdd'
		});
	}

	async exec(guild) {
		if (fs.existsSync(`./welcome/${guild.guild.id}.json`)) {
			let welcome = require(`../../welcome/${guild.guild.id}.json`);
			const channel = this.client.channels.get(welcome['channel']);

			let welcomeMessage = welcome['message'];

			welcomeMessage = welcomeMessage.replace(/\[member\]/, guild.user.username);
			welcomeMessage = welcomeMessage.replace(/\[server\]/, guild.guild.name);
	
			let attach;
			if (welcomeMessage.includes('[attach:')) {
				attach = welcomeMessage.split(/(\[attach:.*?])/);
				for (let i = 0, l = attach.length; i < l; i++) {
					if (attach[i].includes('[attach:')) {
						attach = attach[i].replace('[attach:', '').slice(0, -1);
						i = attach.length;
					}
				}
				welcomeMessage = welcomeMessage.replace(/(\[attach:.*?])/, '');
			}
	
			welcomeMessage = rand.random(welcomeMessage);	
	
	
			if (attach) {
				return channel.send(welcomeMessage, {files: [attach]});
			} else {
				return channel.send(welcomeMessage);
			}
		}
	}
}
module.exports = guildMemberAddListener;