app.js

const path = require('path')
const fs = require('fs')
const config = require('./config/config')
const Discord = require('discord.js')
const mc = require('minecraft-protocol')
const discordClient = new Discord.Client()

let discordChannel
discordClient.on('ready', async () => {
    discordClient.user.setActivity(`${config.mcHost}${config.mcPort===25565?'':':'+config.mcPort}`)
    discordChannel = discordClient.channels.get(config.botchannel[""])
    console.log(`Logged in to Discord as ${discordClient.user.tag}!`)
})

discordClient.on('message', async msg => {
    if (msg.author.bot) return
    if (!msg.content.startsWith('!')) return

    var str = msg.content.substring(1)
    handleChatMessage(str)
})

discordClient.login(config.botToken)

function start() {
    const mcClient = mc.createClient({
        host: config.mcHost,
        port: config.mcPort,
        username: config.mcUsername,
        password: config.mcPassword,
        version: config.mcVersion
    })

    mcClient.on('chat', packet => {
        var msg = ''
        var json = JSON.parse(packet.message)
        if(json.text) {
            msg += json.text
        }
        if(json.extra) {
            json.extra.forEach(function(m) {
                if(m.text) {
                    msg += m.text
                }
            }, this)
        }
        console.log(`[CHAT]: ${msg}`)
        handleChatMessage(msg)
    })

    mcClient.on('success', packet => {
        console.log(`Logged in to ${config.mcHost}${config.mcPort===25565?'':':'+config.mcPort} with ${packet.username}`)
    })

    mcClient.on('end', () => {
        mcClient.removeAllListeners()
        setTimeout(start, 5000)
    })
}
start()

function truncate(str, len) {
    return str.toString().substring(0, len)
}

async function sendSnitchMessage(user, action, snitchName, worldName, x, y, z) {
    await discordChannel.send(`\`${user} ${action} ${snitchName} at ${x}, ${y}, ${z}\``)
}

async function sendChatMessage(channel, username, message) {
    var name = username
    if(channel != null) {
        name = `[${channel}] ${name}`
    }
    const chatEmbed = new Discord.RichEmbed()
        .setAuthor(name, `https://crafatar.com/renders/head/8667ba71b85a4004af54457a9734eed7`)
        .setDescription(message)
        .setTimestamp()
    
    if(channel != null) {
        chatEmbed.setFooter(channel)
    }

    if(config.botchannel[channel] != "") {
        discordClient.channels.get(config.botchannel[channel]).send(chatEmbed)
    } else {
        discordChannel.send(chatEmbed)
    }
}

var snitch = /^(.+)\* (\w+) (entered|logged out in|logged in to) snitch at (.*) \[(\w+) (\d+) (\d+) (.+)\]/
function handleSnitchMessage(msg) {
    var matches = snitch.exec(msg)
    sendSnitchMessage(matches[1], matches[2], matches[3], matches[4], matches[5], matches[6], matches[7])
}

var nl_msg = /^\[(.+)\] (\w+): (.+)/
function handleNameLayerMessage(msg) {
    var matches = nl_msg.exec(msg)
    sendChatMessage(matches[1], matches[2], matches[3])
}

var l_msg = /^(\w+): (.+)/
function handleLocalMessage(msg) {
    var matches = l_msg.exec(msg)
    sendChatMessage(null, matches[1], matches[2])
}

function handleChatMessage(msg) {
    if(snitch.test(msg)) {
        handleSnitchMessage(msg)
    } else if(nl_msg.test(msg)) {
        handleNameLayerMessage(msg)
    } else if(l_msg.test(msg)) {
        handleLocalMessage(msg)
    }
}