/** * Copyright 2013,2014 IBM Corp. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. **/ module.exports = function(RED) { "use strict"; var connectionPool = require("./lib/mqttConnectionPool"); var isUtf8 = require('is-utf8'); function MQTTBrokerNode(n) { RED.nodes.createNode(this,n); this.broker = n.broker; this.port = n.port; this.clientid = n.clientid; if (this.credentials) { this.username = this.credentials.user; this.password = this.credentials.password; } } RED.nodes.registerType("mqtt-broker",MQTTBrokerNode,{ credentials: { user: {type:"text"}, password: {type: "password"} } }); function MQTTInNode(n) { RED.nodes.createNode(this,n); this.topic = n.topic; this.broker = n.broker; this.brokerConfig = RED.nodes.getNode(this.broker); if (this.brokerConfig) { this.status({fill:"red",shape:"ring",text:"disconnected"}); this.client = connectionPool.get(this.brokerConfig.broker,this.brokerConfig.port,this.brokerConfig.clientid,this.brokerConfig.username,this.brokerConfig.password); var node = this; if (this.topic) { this.client.subscribe(this.topic,2,function(topic,payload,qos,retain) { if (isUtf8(payload)) { payload = payload.toString(); } var msg = {topic:topic,payload:payload,qos:qos,retain:retain}; if ((node.brokerConfig.broker === "localhost")||(node.brokerConfig.broker === "127.0.0.1")) { msg._topic = topic; } node.send(msg); }, this.id); this.client.on("connectionlost",function() { node.status({fill:"red",shape:"ring",text:"disconnected"}); }); this.client.on("connect",function() { node.status({fill:"green",shape:"dot",text:"connected"}); }); if (this.client.isConnected()) { node.status({fill:"green",shape:"dot",text:"connected"}); } else { this.client.connect(); } } else { this.error("topic not defined"); } } else { this.error("missing broker configuration"); } this.on('close', function() { if (this.client) { this.client.unsubscribe(this.topic,this.id); this.client.disconnect(); } }); } RED.nodes.registerType("mqtt in",MQTTInNode); function MQTTOutNode(n) { RED.nodes.createNode(this,n); this.topic = n.topic; this.qos = n.qos || null; this.retain = n.retain; this.broker = n.broker; this.brokerConfig = RED.nodes.getNode(this.broker); if (this.brokerConfig) { this.status({fill:"red",shape:"ring",text:"disconnected"}); this.client = connectionPool.get(this.brokerConfig.broker,this.brokerConfig.port,this.brokerConfig.clientid,this.brokerConfig.username,this.brokerConfig.password); var node = this; this.on("input",function(msg) { if (msg.qos) { msg.qos = parseInt(msg.qos); if ((msg.qos !== 0) && (msg.qos !== 1) && (msg.qos !== 2)) { msg.qos = null; } } msg.qos = Number(node.qos || msg.qos || 0); msg.retain = node.retain || msg.retain || false; msg.retain = ((msg.retain === true) || (msg.retain === "true")) || false; if (node.topic) { msg.topic = node.topic; } if ((msg.hasOwnProperty("topic")) && (typeof msg.topic === "string") && (msg.topic !== "")) { // topic must exist this.client.publish(msg); // send the message } else { node.warn("Invalid topic specified"); } }); this.client.on("connectionlost",function() { node.status({fill:"red",shape:"ring",text:"disconnected"}); }); this.client.on("connect",function() { node.status({fill:"green",shape:"dot",text:"connected"}); }); this.client.connect(); } else { this.error("missing broker configuration"); } this.on('close', function() { if (this.client) { this.client.disconnect(); } }); } RED.nodes.registerType("mqtt out",MQTTOutNode); }