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index.js
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index.js
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require('dotenv').config();
const io = require("socket.io-client");
//const { Convert } = require("easy-currencies");
const CC = require("currency-converter-lt");
const log = require("log-to-file");
const storage = require('node-persist')
const Queue = require("./queue").Queue;
let Gpio;
if (process.env.MOONDUNK_DEBUG === "true") {
Gpio = require("./debug-tools").Gpio;
} else {
Gpio = require("onoff").Gpio;
}
// you can change this stuff for setup
const WATER_RATE = parseFloat(process.env.MOONDUNK_RATE); // estimated gallons_per_second
const BUCKET_VOLUME = parseFloat(process.env.MOONDUNK_VOLUME); // estemated gallons
const DOLLAR_GOAL = parseFloat(process.env.MOONDUNK_GOAL); // estimated USD per dunk
// but don't change these unless something has gone very wrong
const TIME_PER_DOLLAR = BUCKET_VOLUME / (WATER_RATE * DOLLAR_GOAL);
const MS_PER_S = 1000.0;
const opts = {
reconnect: true,
transports: ['websocket'],
};
let eventQueue;
const solenoidCtrl = new Gpio(Number(process.env.MOONDUNK_PIN), 'out');
const socket = io.connect('https://realtime.streamelements.com', opts);
const currencyConverter = new CC();
main();
async function main() {
log(`\n\nProgram starting at ${Date.now()}`);
console.log(`\n\nProgram starting at ${Date.now()}`);
// set pin high to start (no water flows)
solenoidCtrl.writeSync(1);
// reload old queue if events are left over
await storage.init();
eventQueue = new Queue(storage);
await eventQueue.loadStored();
socket.on('connect', onConnect);
socket.on('disconnect', onDisconnect);
socket.on('authenticated', onAuthenticated);
socket.on('unauthorized', console.error);
socket.on('event:test', onEventTest);
socket.on('event', onEvent);
processDunks();
}
async function processDunks() {
if (eventQueue.length() != 0) {
await processNext();
}
setTimeout(processDunks, 100);
}
async function processNext() {
const event = eventQueue.peek();
const amountUsd = await currencyConverter.from(event.data.currency).to("USD").amount(event.data.amount).convert();
const duration = amountUsd * TIME_PER_DOLLAR;
const msg = `\n${event.data.username} donated $${amountUsd} USD for ${duration} seconds of water`;
log(msg);
console.log(msg);
const formatter = (time) => {
process.stdout.clearLine(0);
process.stdout.cursorTo(0);
process.stdout.write(`Preparing to dispense in ${time.toFixed(2)} seconds`);
};
await timer(5.0, formatter, 0.1)
console.log();
await eventQueue.dequeue();
// set pin low (water flows)
solenoidCtrl.writeSync(0);
const dispenseMsgr = (time) => {
process.stdout.clearLine(0);
process.stdout.cursorTo(0);
process.stdout.write(`Dispensing water: ${time.toFixed(2)}`);
}
await timer(duration, dispenseMsgr, 0.1);
console.log()
// set pin high (water stops)
solenoidCtrl.writeSync(1);
console.log(`Water for ${event.data.username} finished dispensing`);
}
async function onEventTest(data) {
log(`Test: ${JSON.stringify(data)}`);
log(`New streamelements event: ${data.listener}`);
if (data.listener == "tip-latest") {
const originalFormat = data.event;
const newFormat = convertTestToReal(originalFormat);
await eventQueue.enqueue(newFormat);
}
}
async function onEvent(event) {
log(`Real: ${JSON.stringify(event)}`);
log(`New streamelements event: ${event.type}`);
if (event.type == "tip") {
await eventQueue.enqueue(event);
}
}
function onConnect() {
console.log('Successfully connected to websocket. Beginning authentication ...');
socket.emit('authenticate', {method: 'jwt', token: process.env.MOONDUNK_JWT});
}
function onDisconnect() {
console.log('Disconnected from websocket. Should reconnect automatically');
}
function onAuthenticated(data) {
const {
channelId
} = data;
console.log(`Successfully connected to channel ${channelId}`);
}
async function sleep(seconds) {
const ms = seconds * MS_PER_S;
return new Promise(resolve => setTimeout(resolve, ms));
}
function convertTestToReal(originalFormat) {
return {
"_id": Math.floor(Math.random()*16777215).toString(16),
"channel": `${originalFormat.name}'s channel`,
"type": "tip",
"provider": "twitch",
"createdAt": "time",
"data": {
"tipId": String(Math.floor(Math.random()*16777215).toString(16)),
"username": originalFormat.name,
"amount": originalFormat.amount,
"currency": "USD",
"message": originalFormat.message,
"avatar": "url"
},
"updatedAt": "time",
"activityId": String(Math.floor(Math.random()*16777215).toString(16))
};
}
async function timer(time, fn, step) {
fn(time);
while (time > 0.0001) {
await new Promise(r => setTimeout(r, step * MS_PER_S));
return await timer(Math.max(time - step, 0.0), fn, step);
}
}