node-red-contrib-crestron
Version:
Node-RED nodes for communicating with a Crestron TCP Server.
278 lines (227 loc) • 11.2 kB
JavaScript
const net = require('net')
const async = require('async');
require('events').EventEmitter.setMaxListeners = 15;
module.exports = (RED) => {
function crestronConfigNode(config) {
RED.nodes.createNode(this, config)
var node = this
node.host = config.host
node.port = config.port
node.nodeClients = [] // Stores the registered clients
// set node status
node.setAllClientsStatus = (_status, _color, _text) => {
function nextStatus(oClient) {
oClient.setNodeStatus({ fill: _color, shape: "dot", text: _status + " " + _text })
}
node.nodeClients.map(nextStatus);
}
// node disconnect event
node.Disconnect = () => {
node.setAllClientsStatus("Waiting", "grey", "")
// Remove listener
try {
node.crestronConnection.removeListener("data");
} catch (error) {
}
try {
node.crestronConnection.removeListener("close");
} catch (error) {
}
try {
node.crestronConnection.removeListener("connect");
} catch (error) {
}
try {
node.crestronConnection.removeListener("error");
} catch (error) {
}
node.linkStatus = "disconnected";
try {
node.crestronConnection.destroy();
} catch (error) {
}
node.crestronConnection = null;
}
node.addClient = (_Node) => {
// Check if node already exists
if (node.nodeClients.filter(x => x.id === _Node.id).length === 0) {
// Check if the node has a valid topic and dpt
if (typeof _Node.cid == "undefined") {
_Node.setNodeStatus({ fill: "red", shape: "dot", text: "ID is Null" })
return;
} else {
}
// Add _Node to the clients array
node.nodeClients.push(_Node)
}
// At first node client connection, this node connects to the bus
if (node.nodeClients.length === 1) {
// 14/08/2018 Initialize the connection
node.initcrestronConnection();
}
}
node.removeClient = (_Node) => {
// Remove the client node from the clients array
//RED.log.info( "BEFORE Node " + _Node.id + " has been unsubscribed from receiving KNX messages. " + node.nodeClients.length);
try {
node.nodeClients = node.nodeClients.filter(x => x.id !== _Node.id)
} catch (error) {
// console.log(error);
}
//RED.log.info("AFTER Node " + _Node.id + " has been unsubscribed from receiving KNX messages. " + node.nodeClients.length);
// If no clien nodes, disconnect from bus.
if (node.nodeClients.length === 0) {
node.linkStatus = "disconnected";
node.Disconnect();
}
}
// node.readInitialValues = () => {
// if (node.linkStatus !== "connected") return; // 29/08/2019 If not connected, exit
// if (node.crestronConnection) {
// var readHistory = [];
// let delay = 0;
// node.nodeClients
// .filter(oClient => oClient.initialread)
// .forEach(oClient => {
// if (readHistory.includes(oClient.topic)) return
// setTimeout(() => node.readValue(oClient.topic), delay)
// delay = delay + 200
// readHistory.push(oClient.topic)
// })
// }
// }
node.initcrestronConnection = () => {
node.Disconnect();
node.setAllClientsStatus("Waiting", "grey", "")
//create TCP conn
node.crestronConnection = new net.Socket();
// Connection event
node.crestronConnection.connect(node.port, node.host, function () {
RED.log.info("Connected to Crestron Machine");
});
// Connection success event
node.crestronConnection.on("connect", function () {
// update node status
node.linkStatus = "connected";
RED.log.info('Connected to Crestron Processor');
node.setAllClientsStatus("Connected", "green", "Waiting for message.")
// node.readInitialValues() // Perform initial read if applicable
});
// Listen for messages from the server
node.crestronConnection.on("data", function (data) {
var dataArray = data.toString().split("*"); // Commands terminated with *
async.each(dataArray, function (response, callback) {
// parse msg
var responseArray = response.toString().split(":");
// responseArray[0] = (node.ctype ie Digital) : responseArray[1] = (node.cid) : responseArray[2] = (command ie event) : responseArray[3] = (value)
let type = responseArray[0];
let id = responseArray[1];
let evt = responseArray[2];
let value = responseArray[3];
switch (type) {
case "Digital":
{
node.nodeClients
.forEach(input => {
if (id === input.cid && type === input.ctype) {
if (Number(value) === 1)
{
value = true;
}
else
{
value = false;
}
let msg = buildInputMessage(input.ctype, input.cid, "Event", value, input.name)
input.setNodeStatus({ fill: "green", shape: "dot", text: "Digital msg is coming" });
input.send(msg);
}
});
break;
}
case "Analog":
{
node.nodeClients
.forEach(input => {
if (id === input.cid && type === input.ctype) {
value = Number(value);
if (value >= 0 && value <= 65535)
{
let msg = buildInputMessage(input.ctype, input.cid, "Event", value, input.name)
input.setNodeStatus({ fill: "green", shape: "dot", text: "Analog msg is coming" });
input.send(msg);
}
else
{
RED.log.warn("Value is out of range");
}
}
});
break;
}
case "String":
{
node.nodeClients
.forEach(input => {
if (id === input.cid && type === input.ctype) {
let msg = buildInputMessage(input.ctype, input.cid, "Event", value, input.name)
input.setNodeStatus({ fill: "green", shape: "dot", text: "String msg is coming" });
input.send(msg);
}
});
break;
}
default: return;
}
callback();
});
});
// When the conn is close
node.crestronConnection.on("close", function () {
RED.log.info("Crestron Connection closed");
// update node status
node.linkStatus = "disconnected";
node.setAllClientsStatus("Disconnected", "red", "Connection Closed");
node.linkStatus = "reconnect";
setTimeout(() => node.setAllClientsStatus("Reconnect", "grey", "try reconnect crestron professor"), 3000);
// try reconnect（5s）
if(node.crestronConnection)
{
try {
setTimeout(() => node.crestronConnection.connect(node.port, node.host, function () {
RED.log.info('Re-Connected to Crestron Machine');
}.bind(this)), 5000);
} catch (err) {
RED.log.error(err);
}
}
else{
}
});
node.crestronConnection.on("error", function (err) {
RED.log.error(err);
node.crestronConnection.destroy();
});
}
function buildInputMessage(type, id, evt, value, _devicename) {
var jsValue = null;
jsValue = value;
// Build final input message object
return {
payload: jsValue,
crestron:
{
type: type,
id: id,
evt: evt,
rawValue: value
}
, devicename: (typeof _devicename !== 'undefined') ? _devicename : ""
}
}
node.on("close", function () {
node.Disconnect();
});
}
RED.nodes.registerType("crestron-node-config", crestronConfigNode);
}