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node-red-nodes/social/pusher/114-pusher.js

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/**
* pusher.js
* Subscription module for the Pusher service (www.pusher.com)
* Requires 'pusher' and 'pusher-client' modules.
*
* Copyright 2014 Charalampos Doukas, @BuildingIoT
*
* 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 Pusher = require('pusher');
var PusherClient = require('pusher-client');
//node for subscribing to an event/channel
function PusherNode(n) {
// Create a RED node
RED.nodes.createNode(this,n);
var node = this;
var credentials = RED.nodes.getCredentials(n.id);
if ((credentials) && (credentials.hasOwnProperty("pusherappkey_sub"))) { this.appkey = credentials.pusherappkey_sub; }
else { this.error("No Pusher app key set for input node"); }
//get parameters from user
this.channel = n.channel;
this.eventname = n.eventname;
//create a subscription to the channel and event defined by user
var socket = new PusherClient(''+this.appkey);
var my_channel = socket.subscribe(''+this.channel);
socket.bind(''+this.eventname,
function(data) {
var msg = {};
if (data.hasOwnProperty("payload")) { msg.payload = data.payload; }
else { msg.payload = data; }
node.send(msg);
}
);
this.on("close", function() {
socket.disconnect();
});
}
//Node for sending Pusher events
function PusherNodeSend(n) {
// Create a RED node
RED.nodes.createNode(this,n);
var node = this;
var credentials = RED.nodes.getCredentials(n.id);
if ((credentials) && (credentials.hasOwnProperty("pusherappid"))) { this.appid = credentials.pusherappid; }
else { this.error("No Pusher api token set"); }
if ((credentials) && (credentials.hasOwnProperty("pusherappsecret"))) { this.appsecret = credentials.pusherappsecret; }
else { this.error("No Pusher user secret set"); }
if ((credentials) && (credentials.hasOwnProperty("pusherappkey"))) { this.appkey = credentials.pusherappkey; }
else { this.error("No Pusher user key set"); }
//get parameters from user
this.channel = n.channel;
this.eventname = n.eventname;
var pusher = new Pusher({
appId: this.appid,
key: this.appkey,
secret: this.appsecret
});
this.on("input", function(msg){
pusher.trigger(this.channel, this.eventname, {
"payload": msg.payload
});
});
this.on("close", function() {
});
}
//debugging on the output:
var displayResult = function(result) {
node.log(result);
};
var displayError = function(err) {
node.log("Error: "+err);
};
RED.nodes.registerType("pusher in",PusherNode);
RED.nodes.registerType("pusher out",PusherNodeSend);
var querystring = require('querystring');
RED.httpAdmin.get('/pusher/:id',function(req,res) {
var credentials = RED.nodes.getCredentials(req.params.id);
if (credentials) {
res.send(JSON.stringify({pusherappid:credentials.pusherappid,pusherappsecret:credentials.pusherappsecret, pusherappkey:credentials.pusherappkey, pusherappkey_sub:credentials.pusherappkey_sub}));
} else {
res.send(JSON.stringify({}));
}
});
RED.httpAdmin.delete('/pusher/:id',function(req,res) {
RED.nodes.deleteCredentials(req.params.id);
res.send(200);
});
RED.httpAdmin.post('/pusher/:id',function(req,res) {
var body = "";
req.on('data', function(chunk) {
body+=chunk;
});
req.on('end', function(){
var newCreds = querystring.parse(body);
var credentials = RED.nodes.getCredentials(req.params.id)||{};
if (newCreds.pusherappid === null || newCreds.pusherappid === "") {
delete credentials.pusherappid;
} else {
credentials.pusherappid = newCreds.pusherappid;
}
if (newCreds.pusherappkey === "") {
delete credentials.pusherappkey;
} else {
credentials.pusherappkey = newCreds.pusherappkey||credentials.pusherappkey;
}
if (newCreds.pusherappsecret === "") {
delete credentials.pusherappsecret;
} else {
credentials.pusherappsecret = newCreds.pusherappsecret||credentials.pusherappsecret;
}
if (newCreds.pusherappkey_sub === "") {
delete credentials.pusherappkey_sub;
} else {
credentials.pusherappkey_sub = newCreds.pusherappkey_sub||credentials.pusherappkey_sub;
}
RED.nodes.addCredentials(req.params.id,credentials);
res.send(200);
});
});
}