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

/**
* 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.
**/

var Pusher = require('pusher');
var PusherClient = require('pusher-client');

// Require main module
var RED = require(process.env.NODE_RED_HOME+"/red/red");

//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);
    });
});