role.js

const Discord = require('discord.js');
const config = require('../config.json');
const errors = require('../util/errors.js');
const chalk = require('chalk');

module.exports.run = async (client, message, args) => {
  if (args[0] == 'help') {
    let embed = new Discord.RichEmbed()
      .setTitle(`${module.exports.help.name} Command Information`)
      .setDescription(`${module.exports.help.description}`)
      .addField('Usage', `${config.prefix}${module.exports.help.usage}`, true)
      .addField('Permission', `${module.exports.help.permission}`, true)
      .setColor(config.cyan)
    message.channel.send(embed);
    return
  };

  if (!message.member.hasPermission(`${module.exports.help.permission}`)) return errors.noPermissions(message, `${module.exports.help.permission}`);

  let user = message.guild.member(message.mentions.members.first());
  if (!user) return errors.invalidUser(message);
  let role = args.slice(2).join(" ");
  if (!role) return errors.specifyARole(message);
  let guildRole = message.guild.roles.find(x => x.name === role);
  if (!guildRole) return errors.noRoleExists(message);

  if (args[0] === 'add') {
    if (user.roles.has(guildRole.id)) return errors.userHasRole(message);
    await (user.addRole(guildRole));

    let embed = new Discord.RichEmbed()
      .setTitle('User has been assigned to a role.')
      .setColor(config.green)
      .addField('Assigned User', `${user}`)
      .addField('Assigned By', `${message.author}`)
      .addField('Assigned Role', `${role}`);
    message.channel.send(embed);

    console.log(chalk.yellow(`[${message.guild}]`) + ` ${message.author.username} has assigned the role ${guildRole.name} to ${user.user.username}.`);
  };

  if (args[0] === 'remove') {
    if (!user.roles.has(guildRole.id)) return errors.userDoesNotHaveRole(message);
    await (user.removeRole(guildRole.id));

    let embed = new Discord.RichEmbed()
      .setTitle('User\'s role has been removed.')
      .setColor(config.green)
      .addField('Assigned User', `${user}`)
      .addField('Assigned By', `${message.author}`)
      .addField('Assigned Role', `${role}`);
    message.channel.send(embed);

    console.log(chalk.yellow(`[${message.guild}]`) + ` ${message.author.username} has removed the role ${guildRole.name} to ${user.user.username}.`);
  };
};

module.exports.help = {
  name: 'role',
  description: 'This will add or remove a role from the mentioned user.',
  permission: 'MANAGE_ROLES',
  usage: 'role [add/remove] [@user] [role]'
};