index.js

// require packages
const Discord = require('discord.js');
const settings = require('./settings.json');
const fs = require('fs');

// initialise are bot
const bot = new Discord.Client();
bot.commands = new Discord.Collection();

// import bot setting (data)
const prefix = settings.prefix;
const token = settings.token;
const owner = settings.owner;

// read command files
fs.readdir('./cmds', (err,files) => {
    if (err) {
        console.log(err);
    }

    let cmdFiles = files.filter(f => f.split(".").pop() === "js");

    if (cmdFiles.length === 0){
        console.log("No files found");
        return;
    }

    cmdFiles.forEach((f,i) => {
        let props = require(`./cmds/${f}`);
        console.log(`${i+1}: ${f} loaded`);
        bot.commands.set(props.help.name, props);
    })
});

let raw = fs.readFileSync('./roles.json');
let allowedRoles = JSON.parse(raw);

let validation = function(serverRoles, userRoles){
    let val = false;
    serverRoles.forEach((role) => {
        userRoles.forEach((usr) => {
            if (role === usr){
                val = true;
            }
        });
    });
    return val;
}




const activities_list = [
    "Sentinel Scrims",
    "Sentinel Elite",
    "Sentinel Scrims",
    ];

bot.on('ready', async () => {
    console.log('Im ready, online');
    setInterval(() => {
        const index = Math.floor(Math.random() * (activities_list.length - 1) + 1);
        bot.user.setActivity( activities_list[index] , {type: 'WATCHING'});
    }, 4000);

});

bot.on('message', msg => {
    if (msg.channel.type === "dm") return;

    let msg_array = msg.content.split(" ");
    let command = msg_array[0];
    let args = msg_array.splice(1);

    if (!command.startsWith(prefix)) return;

    if (bot.commands.get(command.slice(prefix.length))){
    if (validation (allowedRoles.roles,msg.member.roles.array()) || msg.member.id === owner){
        let cmd = bot.commands.get(command.slice(prefix.length));
        if (cmd){
            cmd.run(bot,msg,args);
          }
        } else {
            msg.channel.send("You don't have access to this bot commands");
        }
    }

});





// Bot login
bot.login(token)