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

module.exports = function (RED) {
    "use strict";
    const Pusher = require("pusher")
    const PusherClient = require('pusher-js');

    //node for subscribing to an event/channel
    function PusherNode(n) {
        RED.nodes.createNode(this, n);
        this.channel = n.channel;
        this.eventname = n.eventname;
        this.cluster = n.cluster || "mt1";
        var node = this;
        var credentials = this.credentials;

        if ((credentials) && (credentials.hasOwnProperty("pusherappkeysub"))) {
            node.appkey = credentials.pusherappkeysub;
        }
        else { this.error("No Pusher app key set for input node"); }

        //create a subscription to the channel and event defined by user
        // var socket = new PusherClient(''+node.appkey, {cluster:node.cluster, encrypted:true});
        const pusher = new PusherClient('' + node.appkey, {
            cluster: node.cluster
        });
        const channel = pusher.subscribe('' + node.channel);

        channel.bind('' + node.eventname, function (data) {
            var msg = { topic: node.eventname, channel: node.channel };
            if (data.hasOwnProperty("payload")) { msg.payload = data.payload; }
            else { msg.payload = data; }
            node.send(msg);
        });

        node.on("close", function () {
            pusher.disconnect();
        });
    }


    //Node for sending Pusher events
    function PusherNodeSend(n) {
        // Create a RED node
        RED.nodes.createNode(this, n);

        var node = this;
        var credentials = this.credentials;

        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;
        this.cluster = n.cluster || "mt1";

        var pusher = new Pusher({
            appId: this.appid,
            key: this.appkey,
            secret: this.appsecret,
            cluster: this.cluster
        });

        

        node.on("input", function (msg) {
            pusher.trigger(this.channel, this.eventname, {
                "payload": msg.payload
            });
        });

        node.on("close", function () {
        });
    }

    RED.nodes.registerType("pusher in", PusherNode, {
        credentials: {
            pusherappkeysub: "text"
        }
    });
    RED.nodes.registerType("pusher out", PusherNodeSend, {
        credentials: {
            pusherappid: { type: "text" },
            pusherappkey: { type: "text" },
            pusherappsecret: { type: "password" }
        },
        encrypted: true
    });
}