node-red-contrib-meross/meross/smartgarage-control.js

This provides nodes for controlling Meross devices.

const request = require('request');

module.exports = function(RED) {
	'use strict';

	function SmartGarageNode(myNode) {
		RED.nodes.createNode(this, myNode);
		var Crypto = require('crypto');
		var Platform = this;

		this.config = RED.nodes.getNode(myNode.confignode);
		this.ip = myNode.ip;

		this.channel = parseInt(myNode.channel || 0);

		this.on('input', function (msg) {
			if(msg !== undefined && msg.ip !== undefined) {
				Platform.ip = msg.ip;
			}

			request.post({
				url: 'http://' + Platform.ip + '/config',
				headers: {
					'Content-Type': 'application/json',
					'Content-Length': undefined,
				}, 
				body: {
					'header': {
						'messageId': undefined,
						'method': (typeof msg.payload === 'boolean') ?
								  'SET' :
								  'GET',
						'from': 'http://' + Platform.ip + '/config',
						'sign': undefined,
						'namespace': (typeof msg.payload === 'boolean') ?
									 'Appliance.GarageDoor.State' :
									 'Appliance.System.All',
						'timestamp': undefined,
						'triggerSrc': "NodeRedPluginLocal",
						'payloadVersion': 1
					},
					'payload': (typeof msg.payload === 'boolean') ?
					{
						'state': {
							'open': msg.payload ? 1 : 0,
							'channel': Platform.channel,
							'uuid': undefined
						}
					} : 
					{}
				},
				init: function() {
					this.body.header.timestamp = Math.floor(Date.now()/1000);
					this.body.header.messageId = Crypto.createHash('md5').update(
						this.body.header.timestamp.toString()
					).digest('hex');
					this.body.header.sign = Crypto.createHash('md5').update(
						this.body.header.messageId + 
						Platform.config.key +
						this.body.header.timestamp
					).digest('hex');

					if (this.body.payload !== undefined &&
						this.body.payload.state !== undefined)
					{
						this.body.payload.state.uuid = Crypto.createHash('md5').update(
							this.body.header.from
						).digest('hex');
					}

					this.body = JSON.stringify(this.body);
					this.headers["Content-Length"] = this.body.length;

					delete this.init;

					return this;
				}
			}.init(), function(myError, myResponse, myBody) {
				if(myError) {
					Platform.error('There was an Error: ' + myError, msg);
				} else {
					var j = JSON.parse(myResponse.body);
					try {
						var r = (j.header.method !== undefined && j.header.method === 'SETACK') ?
								msg.payload :
								j.payload.all.digest.garageDoor[Platform.channel].open === 1 ? true : false;
					}
					catch (e) {
						var r = 'Received unexpected data!';
					}

					Platform.send(
						{
							origin: msg,
							payload : r
						}
					);
				}
			});
		});
	}
	
	RED.nodes.registerType('smartgarage-control', SmartGarageNode);
};