PokeBot/bot.js

const Discord = require('discord.js');
const bot = new Discord.Client();
const config = require('./config.json');
const fs = require('fs');


bot.commands = new Discord.Collection();
bot.aliases = new Discord.Collection();

function setGame() {
  const games = [
    'Pokemon',
    'Catching things',
    'Finding pokemons',
    'Type p:help for help',
  ];

  bot.user.setPresence({
    status: 'online',
    afk: false,
    game: {
      type: 0,
      name: games[Math.floor(Math.random() * games.length)],
    },
  });
}

fs.readdir('./commands', (err, files) => {
  if (err) console.error(err);
  console.log(`Attempting to load a total of ${files.length} commands into the memory.`);
  files.forEach(file => {
    try {
      const command = require(`./commands/${file}`);
      console.log(`Attempting to load the command "${command.help.name}".`);
      bot.commands.set(command.help.name, command);
      command.conf.aliases.forEach(alias => {
        bot.aliases.set(alias, command.help.name);
        console.log(`Attempting to load "${alias}" as an alias for "${command.help.name}"`);
      });
    }
    catch (err) {
      console.log('An error has occured trying to load a command. Here is the error.');
      console.log(err.stack);
    }
  });
  console.log('Command Loading complete!');
});


bot.on('ready', () => {
  console.log('PokeBot has finished loading.');
  setGame();
  bot.setInterval(setGame, 200000);
});

bot.on('guildMemberAdd', (member) => {
  bot.channels.get('416633835216830495').send(`Welcome to the server **${member.user.tag}**! Make sure to read the rules! We now have ${member.guild.memberCount} members.`);
  const role = member.guild.roles.find('name', 'Trainers');
  member.addRole(role);
});

bot.on('guildMemberRemove', (member) => {
  bot.channels.get('416633835216830495').send(`Aww... **${member.user.tag}** just left...`);
});


bot.on('message', (msg) => {
  parseCommand(msg);
});

function parseCommand(msg) {
  if (msg.author.bot) return;
  if (!msg.content.startsWith('p:')) return;

  const args = msg.content.slice(2).trim().split(/ +/g);
  const command = args.shift();

  let cmd;

  if (bot.commands.has(command)) {
    cmd = bot.commands.get(command);
  } else if (bot.aliases.has(command)) {
    cmd = bot.commands.get(bot.aliases.get(command));
  }

  if (cmd) {
    if (cmd.conf.guildOnly == true) {
      if (!msg.channel.guild) {
        return msg.channel.createMessage('This command can only be ran in a guild.');
      }
    }
    try {
      cmd.run(bot, msg, args);
    }
    catch (e) {
      console.error('Error while running command' + e.stack);
    }
  }
}
bot.login(config.token);