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index.js
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index.js
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#!/usr/bin/env node
const program = require('commander')
const pkg = require('./package.json')
const fs = require('fs')
const path = require('path')
const io = require('socket.io-client')
const jwt = require('jsonwebtoken')
const Autolevel = require('./autolevel.js')
const http = require('http');
//#region prevent starting multiple instances
// create Sentinel server
let server = http.createServer(function(req, res) {
res.send("ok");
});
// make sure this server doesn't keep the process running
server.unref();
server.on('error', function(e) {
if (e.code === "EADDRINUSE") {
console.log("Can't run more than one instance");
process.exit(1);
} else {
console.log(e);
}
});
server.listen(8399, function() {
console.log("Sentinel server running")
});
//#endregion prevent starting multiple instances
program
.version(pkg.version)
.usage('-s <secret> -p <port> -id <id> -name <username> [options]')
.option('-i, --id <id>', 'the id stored in the ~/.cncrc file')
.option('-n, --name <name>', 'the user name stored in the ~/.cncrc file')
.option('-s, --secret <secret>', 'the secret key stored in the ~/.cncrc file')
.option('-p, --port <port>', 'path or name of serial port', '/dev/ttyACM0')
.option('-b, --baudrate <baudrate>', 'baud rate', '115200')
.option('-c, --config <filepath>', 'set the config file', '')
.option('-o, --out-dir <path>', 'path to directory where to write output files, if not present output file is not written to disk', '')
.option('--socket-address <address>', 'socket address or hostname', 'localhost')
.option('--socket-port <port>', 'socket port', '8000')
.option('--controller-type <type>', 'controller type: Grbl|Smoothie|TinyG', 'Grbl')
.option('--access-token-lifetime <lifetime>', 'access token lifetime in seconds or a time span string', '30d')
program.parse(process.argv)
var options = {
id: program.id,
name: (typeof program.name == 'function') ? null : program.name,
secret: program.secret,
port: program.port,
baudrate: program.baudrate,
config: program.config,
outDir: program.outDir,
socketAddress: program.socketAddress,
socketPort: program.socketPort,
controllerType: program.controllerType,
accessTokenLifetime: program.accessTokenLifetime
}
var defaults = {
secret: process.env['CNCJS_SECRET'],
port: '/dev/ttyACM0',
baudrate: 115200,
socketAddress: 'localhost',
outDir: '',
socketPort: 8000,
controllerType: 'Grbl',
accessTokenLifetime: '30d'
}
// Get secret key from the config file and generate an access token
const getUserHome = function () {
return process.env[(process.platform === 'win32') ? 'USERPROFILE' : 'HOME']
}
const cncrc = (program.config) ? program.config : path.resolve(getUserHome(), '.cncrc')
var config
const generateAccessToken = function (payload, secret, expiration) {
const token = jwt.sign(payload, secret, {
expiresIn: expiration
})
return token
}
Object.keys(options).forEach((key) => {
if (!options[key]) {
options[key] = defaults[key]
}
})
if (program.config) {
config = JSON.parse(fs.readFileSync(cncrc, 'utf8'))
if (!program.port) {
if (config.hasOwnProperty('ports') && config.ports[0] && config.ports[0].comName) {
options.port = config.ports[0].comName
}
}
if (!program.baudrate) {
if (config.hasOwnProperty('baudrates') && config.baudrates[0]) {
options.baudrate = config.baudrates[0]
}
}
if (!program.controllerType) {
if (config.hasOwnProperty('controller')) {
options.controllerType = config.controller
}
}
}
if (!options.secret) {
try {
if (!config) {
config = JSON.parse(fs.readFileSync(cncrc, 'utf8'))
}
options.secret = config.secret
} catch (err) {
console.error(err)
process.exit(1)
}
}
if (!options.id && !options.name) {
try {
if (!config) {
config = JSON.parse(fs.readFileSync(cncrc, 'utf8'))
}
if (config.users) {
options.id = config.users[0].id
options.name = config.users[0].name
} else {
options.id = undefined;
options.name = undefined;
}
} catch (err) {
console.error(err)
process.exit(1)
}
}
const token = generateAccessToken({ id: options.id, name: options.name }, options.secret, options.accessTokenLifetime)
const url = 'ws://' + options.socketAddress + ':' + options.socketPort + '?token=' + token
let socket = io.connect('ws://' + options.socketAddress + ':' + options.socketPort, {
'query': 'token=' + token
})
socket.on('connect', () => {
console.log('Connected to ' + url)
// Open port
socket.emit('open', options.port, {
baudrate: Number(options.baudrate),
controllerType: options.controllerType
})
})
socket.on('error', (err) => {
console.error('Connection error.', err)
if (socket) {
socket.destroy()
socket = null
}
})
socket.on('close', () => {
console.log('Connection closed.')
})
socket.on('serialport:open', function (options) {
options = options || {}
console.log('Connected to port "' + options.port + '" (Baud rate: ' + options.baudrate + ')')
socket.emit('command', options.port, 'gcode', '(AL: connected)');
callback(null, socket)
})
socket.on('serialport:error', function (options) {
callback(new Error('Error opening serial port "' + options.port + '"'))
})
// eslint-disable-next-line handle-callback-err
function callback(err, socket) {
if (err) {
// SOME kind of error handling if an error occurs
throw err;
}
let autolevel = new Autolevel(socket, options)
socket.on('serialport:write', function (data, context) {
if (data.indexOf('#autolevel_reapply') >= 0 && context && context.source === 'feeder') {
autolevel.reapply(data, context)
} else if (data.indexOf('#autolevel') >= 0 && context && context.source === 'feeder') {
autolevel.start(data, context)
} else if (data.indexOf('PROBEOPEN') > 0) {
console.log(`Probe file open command: ${data}`);
let startNdx = data.indexOf('PROBEOPEN') + 9;
let endParen = data.indexOf(')');
if (endParen > 0) {
let fileName = data.substring(startNdx, endParen).trim();
autolevel.fileOpen(fileName);
}
} else if (data.indexOf('PROBECLOSE') > 0) {
console.log('Probe file close command');
autolevel.fileClose();
}
else {
autolevel.updateContext(context)
}
})
}