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node-red-nodes/hardware/hue_manage/104-hue_manage.js

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/**
* philips_hue.js
* Basic functionality for accessing and contolling a Philips Hue wireless Lamp
* Allows for bridge/gateway and light scanning, as well as Light ON/OFF/ALERT status update
* Requires node-hue-api https://github.com/peter-murray/node-hue-api
* Copyright 2013 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.
**/
//Require node-hue-api
var hue = require("node-hue-api");
var HueApi = require("node-hue-api").HueApi;
// Require main module
var RED = require(process.env.NODE_RED_HOME+"/red/red");
//store the IP address of the Hue Gateway
var gw_ipaddress = "";
var username, lamp_status, lamp_id, color;
function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),
b: parseInt(result[3], 16)
} : null;
}
// The main node definition - most things happen in here
function HueNode(n) {
// Create a RED node
RED.nodes.createNode(this,n);
var node = this;
//get parameters from user
this.username = n.username;
this.lamp_status = n.lamp_status;
this.lamp_id = n.lamp_id;
this.color = n.color;
// Store local copies of the node configuration (as defined in the .html)
this.topic = n.topic;
var msg = {};
msg.topic = this.topic;
this.on("input", function(msg){
//set the lamp status
//first locate the Hue gateway:
hue.locateBridges(function(err, result) {
var msg2 = {};
msg2.topic = this.topic;
if (err) throw err;
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//check for found bridges
if(result[0]!=null) {
//save the IP address of the 1st bridge found
this.gw_ipaddress = result[0].ipaddress;
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//set light status
var api = new HueApi(this.gw_ipaddress, node.username);
var lightState = hue.lightState;
var state = lightState.create();
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var status;
if(msg.payload=="ALERT"){
status = "ALERT";
}
else if(node.lamp_status=="ON" || msg.payload=="ON") status = "ON";
else if(node.lamp_status=="OFF" || msg.payload=="OFF") status = "OFF";
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if(status=="ALERT") {
api.setLightState(node.lamp_id, state.alert()).then(displayResult).fail(displayError).done();
}
else if(status=="ON") {
if(node.color==null) {
api.setLightState(node.lamp_id, state.on().rgb(hexToRgb(msg.topic).r,hexToRgb(msg.topic).g,hexToRgb(msg.topic).b)).then(displayResult).fail(displayError).done();
}
else {
api.setLightState(node.lamp_id, state.on().rgb(hexToRgb(node.color).r,hexToRgb(node.color).g,hexToRgb(node.color).b)).then(displayResult).fail(displayError).done();
}
}
else {
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api.setLightState(node.lamp_id, state.off()).then(displayResult).fail(displayError).done();
}
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msg2.payload = 'Light with ID: '+node.lamp_id+ ' was set to '+status;
node.send(msg2);
}
else {
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//bridge not found:
var msg = {};
msg.payload = "Bridge not found!";
node.send(msg);
}
});
});
this.on("close", function() {
// Called when the node is shutdown - eg on redeploy.
// Allows ports to be closed, connections dropped etc.
// eg: this.client.disconnect();
});
}
//hue debugging on the output:
var displayResult = function(result) {
console.log(result);
};
var displayError = function(err) {
console.error(err);
};
// Register the node by name. This must be called before overriding any of the
// Node functions.
RED.nodes.registerType("HueNode",HueNode);