index.js

const Discord = require('discord.js');
const client = new Discord.Client();
const config = require('./config/keys.js')
const {ListEvents, handleCreateEvent, DeleteEvent, handleTokenKey} = require('./calendar_exports.js')

//config for heroku
var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.write('Hello World!');
  res.end();
}).listen(process.env.PORT);
//config for heroku


client.on('ready', () => {
    console.log('Ready!');
});

client.on('message', async message => {
  //Check bot ping
    if (message.content === '!ping') {
      message.reply("pong");
    }

  // List events
    if (message.content === '!list-events') {
      let events = await ListEvents(message)
      message.channel.send(events);
    }

  // Create new event
    if (message.content.startsWith('!create-event')) {
      let contents = message.content.split(" ");    
      try {
        var eventLink =  await handleCreateEvent(contents, message)
      } catch (e) {
        var eventLink = e;
      }
      message.channel.send(eventLink);
    }

  // Delete event
    if (message.content.startsWith('!remove-event' || '!delete-event')) {
      let deleteMessage = await DeleteEvent(message.content, message)
      message.channel.send(deleteMessage);
    }

  // Accept Token Key
    if(message.content.startsWith('!token-key')) {
      if(client.user.lastMessage && client.user.lastMessage.content.startsWith("Authorize the app by visiting the url ") && !client.user.lastMessage.content.startsWith("Authenticated")){
        const tokenKey = message.content.split(" ")[1]
        let authMessage = await handleTokenKey(tokenKey, message);
        message.channel.send(authMessage)
      }
      else {
        message.channel.send("Nope...")
      }
    }

});


client.login(config.token);