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node-red-nodes/io/mqlight/mqlight.js

153 lines
5.2 KiB
JavaScript

/**
* Copyright 2013, 2015 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 mqlight = require('mqlight');
var util = require("util");
function MQLightServiceNode(n) {
RED.nodes.createNode(this,n);
var id = "mqlight_" + (n.clientid ? n.clientid : (1+Math.random()*4294967295).toString(16));
var opts = {
service: n.service,
id: id
};
if (this.credentials) {
opts.user = this.credentials.user;
opts.password = this.credentials.password;
}
this.client = mqlight.createClient(opts, function(err) {
if (err) {
util.log('[mqlight] ['+id+'] not connected to service '+n.service);
} else {
util.log('[mqlight] ['+id+'] connected to service '+n.service);
}
});
}
RED.nodes.registerType("mqlight service",MQLightServiceNode,{
credentials: {
user: {type:"text"},
password: {type: "password"}
}
});
function MQLightIn(n) {
RED.nodes.createNode(this, n);
this.topic = n.topic || "";
this.share = n.share || null;
this.service = n.service;
this.serviceConfig = RED.nodes.getNode(this.service);
var node = this;
if (node.serviceConfig) {
if (node.serviceConfig.client) {
var recvClient = node.serviceConfig.client;
recvClient.on("started", function() {
recvClient.on("message", function(data, delivery) {
var msg = {
topic: delivery.message.topic,
payload: data,
_session: {
type: "mqlight",
id: recvClient.id
}
};
if (delivery.destination.share) {
msg.share = delivery.destination.share;
}
node.send(msg);
});
recvClient.on("error", function(err) {
if (err) {
node.error(err.toString());
}
});
var subscribeCallback = function(err) {
if (err) {
node.error("Failed to subscribe: " + err);
} else {
node.log("Subscribed to "+node.topic+(node.share?" ["+node.share+"]":""));
}
};
if (node.share) {
recvClient.subscribe(node.topic, node.share, subscribeCallback);
} else {
recvClient.subscribe(node.topic, subscribeCallback);
}
});
recvClient.start();
node.on("close", function (done) {
recvClient.stop(done);
});
}
}
}
RED.nodes.registerType("mqlight in", MQLightIn);
function MQLightOut(n) {
RED.nodes.createNode(this, n);
this.topic = n.topic || "";
this.service = n.service;
this.serviceConfig = RED.nodes.getNode(this.service);
var node = this;
if (node.serviceConfig) {
if (node.serviceConfig.client) {
var sendClient = node.serviceConfig.client;
sendClient.on("started", function () {
node.on("input", function(msg) {
var topic = node.topic;
if (topic === "") {
if (msg.topic) {
node.topic = msg.topic;
} else {
node.warn("No topic set in MQ Light out node");
return;
}
}
sendClient.send(node.topic, msg.payload, function(err) {
if (err) {
node.error(err,msg);
}
});
});
});
sendClient.on("error", function(err) {
if (err) {
node.error(err.toString());
}
});
sendClient.start();
node.on("close", function (done) {
sendClient.stop(done);
});
}
}
}
RED.nodes.registerType("mqlight out", MQLightOut);
};