mirror of
https://github.com/node-red/node-red-nodes.git
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259 lines
9.7 KiB
JavaScript
259 lines
9.7 KiB
JavaScript
/**
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* Copyright 2013-2014 Agile Innovative Ltd.
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* Based on code written by Dave Conway-Jones, IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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module.exports = function(RED) {
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"use strict";
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var blinkstick = require("blinkstick");
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var availableTasks = ["set_color", "blink", "pulse", "morph"];
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Object.size = function(obj) {
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var size = 0;
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for (var key in obj) { if (obj.hasOwnProperty(key)) { size++; } }
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return size;
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};
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//Helper function to convert decimal number to hex with padding
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function decimalToHex(d, padding) {
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var hex = Number(d).toString(16);
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padding = typeof (padding) === "undefined" || padding === null ? padding = 2 : padding;
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while (hex.length < padding) {
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hex = "0" + hex;
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}
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return hex;
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}
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function validateInt(value, defaultValue) {
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return typeof (value) === "undefined" || value === null ? value = defaultValue : parseInt(value);
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}
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function validate(value, defaultValue) {
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return typeof (value) === "undefined" || value === null ? value = defaultValue : value;
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}
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function validatePayloadObject (obj) {
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var
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task = validate(obj.task),
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delay = validateInt(obj.delay),
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repeats = validateInt(obj.repeats),
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duration = validateInt(obj.duration),
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steps = validateInt(obj.steps),
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repeat = validate(obj.repeat),
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color = validate(obj.color);
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if (typeof(task) !== 'undefined' && availableTasks.indexOf(task) === -1) {
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return "Task is invalid";
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}
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if (typeof(color) === 'undefined') {
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return "Color parameter is not set";
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}
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return { 'task': task, 'delay': delay, 'repeats': repeats, 'duration': duration, 'steps': steps,
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'repeat': repeat, 'color': color };
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}
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function BlinkStick(n) {
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RED.nodes.createNode(this,n);
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this.name = n.name;
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this.serial = n.serial;
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this.task = n.task || "set_color";
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this.delay = n.delay || 500;
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this.repeats = n.repeats || 1;
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this.duration = n.duration || 1000;
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this.steps = n.steps || 50;
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this.repeat = n.repeat;
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this.closing = false;
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this.color = '';
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this.previousColor = '';
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var p1 = /[0-9]+,[0-9]+,[0-9]+/;
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var node = this;
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//Keeps track for active animations
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var animationComplete = true;
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//Find BlinkStick based on serial number if supplied, otherwise look for first
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//Blinkstick in the USB device list
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var findBlinkStick = function (callback) {
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if (typeof(node.serial) == 'string' && node.serial.replace(/\s+/g,'') !== '') {
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blinkstick.findBySerial(node.serial, function (device) {
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node.led = device;
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if (Object.size(node.led) === 0) {
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node.status({fill:"red",shape:"ring",text:"disconnected"});
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node.error("BlinkStick with serial number " + node.serial + " not found");
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} else {
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node.status({fill:"green",shape:"dot",text:"connected"});
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if (callback) callback();
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}
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});
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} else {
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node.led = blinkstick.findFirst();
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if (Object.size(node.led) === 0) {
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node.status({fill:"red",shape:"ring",text:"disconnected"});
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node.error("No BlinkStick found");
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} else {
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node.status({fill:"green",shape:"dot",text:"connected"});
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if (callback) callback();
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}
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}
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};
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//Check if repeat is enabled. Works only for pulse and blink tasks
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var canRepeat = function () {
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return node.task == "pulse" || node.task == "blink";
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};
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//Event handler for all animation complete events
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var blinkstickAnimationComplete = function (err) {
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if (typeof(err) !== 'undefined') {
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node.warn(err);
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if (typeof(err.name) === 'undefined' || err.name !== 'ReferenceError') {
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//USB error occurred when BlinkStick was animating
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node.led.close(function (err) {
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node.led = undefined;
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findBlinkStick();
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});
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}
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}
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animationComplete = true;
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//Apply queued color animation
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if (!node.closing && node.color !== '') {
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//Apply new color only if there was no error or queued color is different from the previous color
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if (typeof(err) === 'undefined' || typeof(err) !== 'undefined' && node.color != node.previousColor) {
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applyColor();
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}
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}
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};
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var applyColor = function () {
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animationComplete = false;
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//Store the value of color to check if it has changed
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node.previousColor = node.color;
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try {
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//Select animation to perform
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if (node.task == "pulse") {
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node.led.pulse(node.color, {'duration': node.duration, 'steps': node.steps }, blinkstickAnimationComplete);
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} else if (node.task == "morph") {
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node.led.morph(node.color, {'duration': node.duration, 'steps': node.steps }, blinkstickAnimationComplete);
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} else if (node.task == "blink") {
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node.led.blink(node.color,{'repeats': node.repeats, 'delay': node.delay }, blinkstickAnimationComplete);
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} else {
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node.led.setColor(node.color, blinkstickAnimationComplete);
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}
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} catch (err) {
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if (err.toString().indexOf("setColor") !== -1) {
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node.led.setColour(node.color, blinkstickAnimationComplete);
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node.warn("Old version - please upgrade Blinkstick npm");
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}
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else {
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node.warn("BlinkStick missing ? " + err);
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}
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console.log(err);
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//Reset animation
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animationComplete = true;
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//Clear color
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node.color = '';
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//Look for a BlinkStick
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findBlinkStick();
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return;
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}
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//Clear color value until next one is received, unless repeat option is set to true
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if (!node.repeat || !canRepeat()) {
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node.color = '';
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}
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};
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findBlinkStick();
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this.on("input", function(msg) {
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if (typeof(msg.payload) === 'object' ) {
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var data = validatePayloadObject(msg.payload);
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if (typeof(data) === 'object') {
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node.task = data.task ? data.task : node.task;
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node.delay = data.delay ? data.delay : node.delay;
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node.repeats = data.repeats ? data.repeats : node.repeats;
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node.duration = data.duration ? data.duration : node.duration;
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node.steps = data.steps ? data.steps : node.steps;
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node.repeat = data.repeat ? data.repeat : node.repeat;
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node.color = data.color ? data.color : node.color;
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} else {
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node.error(data);
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return;
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}
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} else if (p1.test(msg.payload)) {
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//Color value is represented as "red,green,blue" string of bytes
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var rgb = msg.payload.split(",");
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//Convert color value back to HEX string for easier implementation
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node.color = "#" + decimalToHex(parseInt(rgb[0])&255) +
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decimalToHex(parseInt(rgb[1])&255) + decimalToHex(parseInt(rgb[2])&255);
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} else {
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//Sanitize color value
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node.color = msg.payload.toLowerCase().replace(/\s+/g,'');
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}
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if (Object.size(node.led) !== 0) {
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//Start color animation, otherwise the color is queued until current animation completes
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if (animationComplete) {
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applyColor();
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}
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} else {
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//Attempt to find BlinkStick and start animation if it's found
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findBlinkStick(function() {
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if (animationComplete) {
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applyColor();
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}
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});
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}
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});
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this.on("close", function() {
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//Set the flag to finish all animations
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this.closing = true;
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if (Object.size(node.led) !== 0) {
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//Close device and stop animations
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if (typeof this.led.close === "function") { this.led.close(); }
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else { node.warn("Please upgrade blinkstick npm"); }
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}
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});
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}
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RED.nodes.registerType("blinkstick",BlinkStick);
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RED.httpAdmin.get("/blinksticklist",function(req,res) {
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blinkstick.findAllSerials(function(serials) {
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res.writeHead(200, {'Content-Type': 'application/json'});
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res.write(JSON.stringify(serials));
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res.end();
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});
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});
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};
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