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node-red-nodes/function/rbe/rbe.js
2016-11-06 20:26:19 +00:00

69 lines
2.8 KiB
JavaScript

module.exports = function(RED) {
"use strict";
function RbeNode(n) {
RED.nodes.createNode(this,n);
this.func = n.func || "rbe";
this.gap = n.gap || "0";
this.start = n.start || '';
this.inout = n.inout || "out";
this.pc = false;
if (this.gap.substr(-1) === "%") {
this.pc = true;
this.gap = parseFloat(this.gap);
}
this.g = this.gap;
var node = this;
node.previous = {};
this.on("input",function(msg) {
if (msg.hasOwnProperty("payload")) {
var t = msg.topic || "_no_topic";
if (this.func === "rbe") {
if (typeof(msg.payload) === "object") {
if (typeof(node.previous[t]) !== "object") { node.previous[t] = {}; }
if (!RED.util.compareObjects(msg.payload, node.previous[t])) {
node.previous[t] = msg.payload;
node.send(msg);
}
}
else {
if (msg.payload !== node.previous[t]) {
node.previous[t] = msg.payload;
node.send(msg);
}
}
}
else {
var n = parseFloat(msg.payload);
if (!isNaN(n)) {
if ((typeof node.previous[t] === 'undefined') && (this.func === "narrowband")) {
if (node.start === '') { node.previous[t] = n; }
else { node.previous[t] = node.start; }
}
if (node.pc) { node.gap = (node.previous[t] * node.g / 100) || 0; }
if (!node.previous.hasOwnProperty(t)) { node.previous[t] = n - node.gap; }
if (Math.abs(n - node.previous[t]) >= node.gap) {
if (this.func === "deadband") {
if (node.inout === "out") { node.previous[t] = n; }
node.send(msg);
}
}
else {
if (this.func === "narrowband") {
if (node.inout === "out") { node.previous[t] = n; }
node.send(msg);
}
}
if (node.inout === "in") { node.previous[t] = n; }
}
else {
node.warn(RED._("rbe.warn.nonumber"));
}
}
} // ignore msg with no payload property.
});
}
RED.nodes.registerType("rbe",RbeNode);
}