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'use strict'
const Discord = require('discord.js')
const Rcon = require('./lib/rcon.js')
const express = require('express')
const axios = require('axios')
const emojiStrip = require('emoji-strip')
const { Tail } = require('tail')
const fs = require('fs')
const configFile = (process.argv.length > 2) ? process.argv[2] : './config.json'
console.log('[INFO] Using configuration file:', configFile)
const c = require(configFile)
let app = null
let tail = null
function fixUsername (username) {
return username.replace(/(ยง[A-Z-a-z0-9])/g, '')
}
// replace mentions with discriminator with the actual mention
function replaceDiscordMentions (message) {
if (c.ALLOW_USER_MENTIONS) {
const possibleMentions = message.match(/@(\S+)/gim)
if (possibleMentions) {
for (let mention of possibleMentions) {
const mentionParts = mention.split('#')
let username = mentionParts[0].replace('@', '')
if (mentionParts.length > 1) {
const user = shulker.users.find(user => user.username === username && user.discriminator === mentionParts[1])
if (user) {
message = message.replace(mention, '<@' + user.id + '>')
}
}
}
}
}
return message
}
function makeDiscordMessage (username, message) {
// make a discord message string by formatting the configured template with the given parameters
message = replaceDiscordMentions(message)
return c.DISCORD_MESSAGE_TEMPLATE
.replace('%username%', username)
.replace('%message%', message)
}
function makeDiscordWebhook (username, message) {
message = replaceDiscordMentions(message)
return {
username: username,
content: message,
'avatar_url': `https://minotar.net/helm/${username}/256.png`
}
}
function makeMinecraftTellraw (message) {
// same as the discord side but with discord message parameters
const username = emojiStrip(message.author.username)
const discriminator = message.author.discriminator
const text = emojiStrip(message.cleanContent)
// hastily use JSON to encode the strings
const variables = JSON.parse(JSON.stringify({ username, discriminator, text }))
return c.MINECRAFT_TELLRAW_TEMPLATE
.replace('%username%', variables.username)
.replace('%discriminator%', variables.discriminator)
.replace('%message%', variables.text)
}
const debug = c.DEBUG
const shulker = new Discord.Client()
function initApp () {
// run a server if not local
if (!c.IS_LOCAL_FILE) {
app = express()
const http = require('http').Server(app)
app.use(function (request, response, next) {
request.rawBody = ''
request.setEncoding('utf8')
request.on('data', function (chunk) {
request.rawBody += chunk
})
request.on('end', function () {
next()
})
})
const serverport = process.env.PORT || c.PORT
http.listen(serverport, function () {
console.log('[INFO] Bot listening on *:' + serverport)
})
} else {
if (fs.existsSync(c.LOCAL_FILE_PATH)) {
console.log('[INFO] Using configuration for local file at "' + c.LOCAL_FILE_PATH + '"')
tail = new Tail(c.LOCAL_FILE_PATH)
} else {
throw new Error('[ERROR] Local file not found at "' + c.LOCAL_FILE_PATH + '"')
}
}
}
function watch (callback) {
if (c.IS_LOCAL_FILE) {
tail.on('line', function (data) {
// ensure that this is a message
if (data.indexOf(': <') !== -1) {
callback(data)
}
})
} else {
app.post(c.WEBHOOK, function (request, response) {
callback(request.rawBody)
response.send('')
})
}
}
shulker.on('ready', function () {
watch(function (body) {
console.log('[INFO] Recieved ' + body)
const re = new RegExp(c.REGEX_MATCH_CHAT_MC)
const ignored = new RegExp(c.REGEX_IGNORED_CHAT)
if (!ignored.test(body)) {
const bodymatch = body.match(re)
const username = fixUsername(bodymatch[1])
const message = bodymatch[2]
if (debug) {
console.log('[DEBUG] Username: ' + bodymatch[1])
console.log('[DEBUG] Text: ' + bodymatch[2])
}
if (c.USE_WEBHOOKS) {
const webhook = makeDiscordWebhook(username, message)
axios.post(c.WEBHOOK_URL, {
...webhook
}, {
headers: {
'Content-Type': 'application/json'
}
})
} else {
// find the channel
const channel = shulker.channels.find((ch) => ch.id === c.DISCORD_CHANNEL_ID && ch.type === 'text')
channel.send(makeDiscordMessage(username, message))
}
}
})
})
shulker.on('message', function (message) {
if (message.channel.id === c.DISCORD_CHANNEL_ID && message.channel.type === 'text') {
if (c.USE_WEBHOOKS && message.webhookID) {
return // ignore webhooks if using a webhook
}
if (message.author.id !== shulker.user.id) {
if (message.attachments.length) { // skip images/attachments
return
}
const client = new Rcon(c.MINECRAFT_SERVER_RCON_IP, c.MINECRAFT_SERVER_RCON_PORT) // create rcon client
client.auth(c.MINECRAFT_SERVER_RCON_PASSWORD, function () { // only authenticate when needed
client.command('tellraw @a ' + makeMinecraftTellraw(message), function (err) {
if (err) {
console.log('[ERROR]', err)
}
client.close() // close the rcon connection
})
})
}
}
})
initApp()
shulker.login(c.DISCORD_TOKEN)
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