88-emoncms.js

module.exports = function(RED) {
    "use strict";
    //The Server Definition - this opens (and closes) the connection
    function EmoncmsServerNode(n) {
        RED.nodes.createNode(this,n);
        this.server = n.server;
        this.name = n.name;
    }
    RED.nodes.registerType("emoncms-server",EmoncmsServerNode,{
        credentials: {
            apikey: {type:"text"}
        }
    });

    function Emoncms(n) {
        RED.nodes.createNode(this,n);
        this.emonServer = n.emonServer;
        var sc = RED.nodes.getNode(this.emonServer);

        this.baseurl = sc.server;
        this.apikey = sc.credentials.apikey;

        this.nodegroup = n.nodegroup || "";
        this.datatype = n.datatype || "";
        var node = this;
        var http;
        if (this.baseurl.substring(0,5) === "https") { http = require("https"); }
        else { http = require("http"); }
        this.on("input", function(msg) {

            // setup the data for the URI
            if (this.datatype == "legacy") {
                this.url = this.baseurl + '/input/post.json?';
                if (typeof(msg.payload) !== "string") {
                    this.url += 'json=' + JSON.stringify(msg.payload);
                }
                else {
                    if (msg.payload.indexOf(':') > -1) {
                        this.url += 'json={' + msg.payload + '}';
                    }
                    else {
                        this.url += 'csv=' + msg.payload;
                    }
                }
            }
            else if (this.datatype == "fulljson") {
                this.url = this.baseurl + '/input/post?';
                this.url += 'fulljson=' + encodeURIComponent(JSON.stringify(msg.payload));
            }
            else if (this.datatype == "json") {
                this.url = this.baseurl + '/input/post?';
                this.url += 'json={' + encodeURIComponent(msg.payload) + '}';
            }
            else if (this.datatype == "CSV") {
                this.url = this.baseurl + '/input/post?';
                this.url += 'csv=' + msg.payload;
            }
            else {
                node.error("ERROR : No valid data type set - " + this.datatype);
                node.status({fill:"red",shape:"ring",text:"No valid data type set"});
                return;
            }

            // setup the node group for URI. Must have a node group or exit
            var nodegroup = this.nodegroup || msg.nodegroup;
            if (typeof nodegroup === "undefined") {
                node.error("ERROR: A Node group must be specified - " + nodegroup);
                node.status({fill:"red",shape:"ring",text:"No Nodegroup"});
                return;
            } else {
                this.url += '&node=' + nodegroup;
            }

            // setup the API key for URI.
            this.url += '&apikey=' + this.apikey;

            // check for a time object and setup URI if valid
            if (typeof msg.time === "undefined") {
                // node.warn("WARN: Time object undefined, no time set");
            }
            else {
                if (!isNaN(msg.time)) {
                    this.url += '&time=' + msg.time;
                }
                else {
                    if (isNaN(Date.parse(msg.time))) {
                        // error condition as msg.tme has some value that is not understood
                        node.warn("WARN: Time object not valid, no time set - " + msg.time);
                    } else {
                        this.url += '&time=' + Date.parse(msg.time)/1000; //seconds
                    }
                }
                delete msg.time; // clean it up for the error msg
            }
            var URIsent = this.url;

            msg.payload = "";
            msg.urlsent = decodeURIComponent(URIsent);

            var request = http.get(this.url, function(res) {
                msg.topic = "http response";
                msg.rc = res.statusCode;
                res.setEncoding('utf8');
                var body = "";

                res.on('data', function(chunk) {
                    body += chunk;
                });

                res.on('end', function() {
                    // need to test for JSON as some responses are not valid JSON
                    try {
                        msg.payload = JSON.parse(body);
                    }
                    catch (e) {
                        msg.payload = body;
                    }

                    if (msg.payload.success) {
                        node.status({fill:"green",shape:"dot",text:"Success RC="+ msg.rc});
                    }
                    else if (msg.payload === 'ok') {
                        node.status({fill:"green",shape:"dot",text:"ok RC="+ msg.rc});
                    }
                    else if (msg.payload === 'Invalid API key') {
                        node.error(msg);
                        node.status({fill:"red",shape:"ring",text:"Invalid API key RC="+ msg.rc});
                    } else {
                        msg.warning = "ERROR: API Call Failed";
                        node.error(msg);
                        node.status({fill:"red",shape:"ring",text:"API Failed RC="+ msg.rc});
                    }
                });
            }).on('error', function(e) {
                msg.warning = e
                node.error(msg);
                node.error(e,msg);
                node.status({fill:"red",shape:"dot",text:"HTTP Error"});
            });
            request.setTimeout(6000, function() {
                node.error("HTTP Timeout",msg);
                node.status({fill:"red",shape:"ring",text:"HTTP Timeout"});
            });
        });
    }
    RED.nodes.registerType("emoncms",Emoncms);

    function Emoncmsin(n) {
        RED.nodes.createNode(this,n);
        this.emonServer = n.emonServer;
        var sc = RED.nodes.getNode(this.emonServer);

        this.baseurl = sc.server;
        this.apikey = sc.credentials.apikey;

        this.feedid = n.feedid
        var node = this;
        var http;
        if (this.baseurl.substring(0,5) === "https") { http = require("https"); }
        else { http = require("http"); }
        this.on("input", function(msg) {
            this.url = this.baseurl + '/feed/aget.json';
            this.url += '&apikey='+this.apikey;
            var feedid = this.feedid || msg.feedid;
            if (feedid !== "") {
                this.url += '&id=' + feedid;
            }
            http.get(this.url, function(res) {
                msg.rc = res.statusCode;
                msg.payload = "";
                msg.feed_data = "";
                res.setEncoding('utf8');
                res.on('data', function(chunk) {
                    msg.feed_data += chunk;
                });
                res.on('end', function() {
                    if (msg.rc === 200) {
                        try {
                            msg.feed_data = JSON.parse(msg.feed_data);
                            msg.topic = msg.feed_data.name;
                            msg.payload = msg.feed_data.value;
                        }
                        catch(err) {
                            // Failed to parse, pass it on
                        }
                        node.send(msg);
                    }
                });
            }).on('error', function(e) {
                node.error(e,msg);
            });
        });
    }
    RED.nodes.registerType("emoncms in",Emoncmsin);
}