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December 13, 2015 20:29
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A simple NodeJS timer script for the blink(1) USB status light. The script accepts a duration (in minutes) + a warning time (in minutes or seconds) + a "flash" time (in minutes or seconds) via the command line. For example: node blinkTimer.js duration=10,warn=2,flash=1 This command will display a green light first. At 5 minutes (automatic half-w…
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| ////////////////////////////////////////////////////////////// | |
| // blink(1) timer // | |
| // by: @toddanglin // | |
| ////////////////////////////////////////////////////////////// | |
| var http = require("http"); | |
| console.log("blink(1) Timer Started"); | |
| //PROTOTYPE Customizations | |
| Date.prototype.addMs = function(m) { | |
| this.setTime(this.getTime() + m); | |
| return this; | |
| } | |
| String.prototype.endsWith = function(suffix) { | |
| return this.indexOf(suffix, this.length - suffix.length) !== -1; | |
| }; | |
| //GLOBAL EVENTS | |
| process.on( 'SIGINT', function() { | |
| console.log( "\nShutting down blink timer..." ) | |
| setOff(function(){ | |
| process.exit(); | |
| }); //Turn off the light | |
| }) | |
| //VARIABLES | |
| var durationMs = 60 * 60 * 1000, //DEFAULT Duration (60 min) | |
| endTime, //SET AFTER ARGS are processed | |
| warnTimeMs = 5 * 60 * 1000, //DEFAULT Warn Time (5min) | |
| flashTimeMs = 1 * 60 * 1000, //DEFAULT Flash Time (1min) | |
| startColor = "#09FF34", | |
| midColor = "#FFBA07", | |
| endColor = "#FF211E", | |
| half = false, //Status flags to track light actions | |
| warn = false, | |
| flash = false, | |
| blinkHost = "localhost", | |
| blinkPort = 8934, //DEFAULT blink port | |
| arguments = process.argv.splice(2); | |
| //ARGUMENTS | |
| //Process configuration values | |
| if(arguments != null){ | |
| var config = String(arguments).split(","); | |
| config.forEach(function(val){ | |
| var pair = val.split("="); | |
| switch(pair[0]){ | |
| case 'length': | |
| console.log("Length (min): "+ pair[1]); | |
| durationMs = pair[1] * 60 * 1000; | |
| break; | |
| case 'warn': | |
| console.log("Warn Time (time index): "+ pair[1]); | |
| if(pair[1].endsWith("s")){ | |
| warnTimeMs = pair[1].replace("s","") * 1000; //Time provided in seconds | |
| } else { | |
| warnTimeMs = pair[1] * 60 * 1000; //Assume time provided in minutes | |
| } | |
| break; | |
| case 'flash': | |
| console.log("Flash Time (time index): "+ pair[1]); | |
| if(pair[1].endsWith("s")){ | |
| flashTimeMs = pair[1].replace("s","") * 1000; //Time provided in seconds | |
| } else { | |
| flashTimeMs = pair[1] * 60 * 1000; //Assume time provided in minutes | |
| } | |
| break; | |
| case '-h' || 'help': | |
| console.log("Usage: BLINK timer allows you to specify a duration, warning time, and flash time"); | |
| return; | |
| default: | |
| console.log("Sorry. Don't understand that configuration option ("+ val +")"); | |
| return; | |
| } | |
| }); | |
| } | |
| //SET END TIME | |
| endTime = new Date().addMs(durationMs); | |
| //====== APPLICATION BEGIN ======== | |
| //To start set BLINK to Green | |
| setColor(startColor); | |
| //START timer to check for color change condition | |
| var timer = setInterval (checkColor, 500); | |
| function checkColor(){ | |
| var now = new Date(), | |
| timeLeft = endTime - now; | |
| //console.log("CHECK COLOR (Time left: "+ timeLeft +")"); | |
| if(timeLeft > (durationMs/2)) return; | |
| if(timeLeft > warnTimeMs && !half){ | |
| console.log("HALF TIME elapsed. Showing mid color."); | |
| //IF HERE, Half of time has elapsed. Set BLINK to Yellow | |
| setColor(midColor); | |
| half = true; //Flip flag so we don't set light twice | |
| return; | |
| }else if(timeLeft <= warnTimeMs && timeLeft > flashTimeMs && !warn){ | |
| console.log("WARNING TIME reached. Showing warn color."); | |
| //IF HERE, Only 5 minutes remain. Set BLINK to Red | |
| setColor(endColor); | |
| warn = true; //Flip flag so we don't set warn light twice | |
| return; | |
| }else if(timeLeft <= flashTimeMs && timeLeft > 0 && !flash){ | |
| console.log("FLASH TIME reached. Flashing the warn color."); | |
| //IF HERE, Only 1 minute remains. Flash BLINK. | |
| setColor(endColor, true); | |
| flash = true; //Flip flag | |
| return; | |
| }else if(timeLeft <= 0){ | |
| shutDown(); | |
| } | |
| } | |
| function shutDown(){ | |
| console.log("TIME'S UP! Turning-off light"); | |
| if(timer !== undefined) | |
| clearTimeout(timer); | |
| destroyFlashPattern(); | |
| setOff(); | |
| return; | |
| } | |
| function setColor(hexColor, flashColor){ | |
| if(flashColor === false || flashColor === undefined){ | |
| sendCommand("/blink1/fadeToRGB?rgb="+ encodeURIComponent(hexColor) +"&time="+ 0.3) | |
| } else { | |
| createFlashPattern(hexColor, function(){ | |
| sendCommand("/blink1/pattern/play?pname=blinker"); | |
| }); | |
| } | |
| } | |
| function setOff(cb){ | |
| sendCommand("/blink1/off", cb); | |
| } | |
| function playFlash(){ | |
| sendCommand(); | |
| } | |
| function createFlashPattern(hexColor, cb) | |
| { | |
| sendCommand("/blink1/pattern/add?pname=blinker&pattern=0,"+ encodeURIComponent(hexColor) +",0.8,%23000000,0.3", cb); | |
| } | |
| function destroyFlashPattern() | |
| { | |
| sendCommand("/blink1/pattern/del?pname=blinker"); | |
| } | |
| function sendCommand(path, cb){ | |
| console.log("SEND BLINK Command: "+ path); | |
| var options = { | |
| host: blinkHost, | |
| port: blinkPort, //Default BLINK port | |
| path: path, | |
| method: "GET" | |
| }; | |
| http.request(options, function(res) { | |
| res.setEncoding('utf8'); | |
| res.on('data', function (chunk) { | |
| //console.log('BLINK Response: ' + chunk); | |
| if(cb !== undefined) | |
| cb(chunk); | |
| }); | |
| }).end(); | |
| } |
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