142 lines
No EOL
4.6 KiB
JavaScript
142 lines
No EOL
4.6 KiB
JavaScript
// requirements
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const path = require('path');
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const config = require('../config');
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const packageJSON = require('../package.json');
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const logger = require('./logger');
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const blinkstick = require('./blinkstick');
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// third party requirements
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const express = require('express');
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const favicon = require('serve-favicon');
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const parser = require('body-parser');
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// setup express, blinkstick and other stuff
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const app = express();
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app.use(favicon(path.join(path.dirname(__dirname), "public", "favicon.ico")));
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app.use(parser.json());
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app.use(parser.urlencoded({ extended: true }));
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// get the html content for get requests
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// TODO: replace with template engine (vue.js)
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function getHTML() {
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let welcomeMessage =
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"<html>" +
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"<head>" +
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"<title>" + packageJSON.name + " " + packageJSON.version + "</title>" +
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"<style>" +
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"body { background: #2a2a2a; color: #f1f1f1; margin: 1.25% }" +
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"th, td { border: 1px solid #919191; padding: 6px; text-align: left }" +
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"</style>" +
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"</head>" +
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"<body>" +
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"<div>" +
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"<h1>" + packageJSON.name + " " + packageJSON.version + "</h1>" +
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"</div>" +
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"<hr>";
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welcomeMessage +=
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"<div>" +
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"<h2>get:</h2>" +
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"<p>" + config.api.get.description + "</p>" +
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"</div>";
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welcomeMessage +=
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"<div>" +
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"<h2>post:</h2>" +
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"<table style=\"width:100%\">" +
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"<th>argument</th>" +
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"<th>available values</th>" +
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"<th>default</th>" +
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"<th>restrictions</th>" +
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"<th>description</th>";
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Object.keys(config.api.post).forEach(function (argument) {
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let restrictions = config.api.post[argument].restrictions || "";
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welcomeMessage +=
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"<tr>" +
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"<td>" + argument + "</td>" +
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"<td>" + config.api.post[argument].available + "</td>" +
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"<td>" + config.api.post[argument].default + "</td>" +
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"<td>" + restrictions + "</td>" +
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"<td>" + config.api.post[argument].description + "</td>" +
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"</tr>";
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});
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welcomeMessage +=
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"</table>" +
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"</div>" +
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"</body>" +
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"</html>";
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return welcomeMessage;
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}
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// run the express http server and handle gets/posts
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function start() {
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return new Promise(function (resolve, reject) {
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app.listen(config.server.port, config.server.listen)
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.on("listening", function () {
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return resolve("server listening on " + config.server.listen + ":" + config.server.port + "...")
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})
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.on("error", function (err) {
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return reject("error starting server (" + err + ")");
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});
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});
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}
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function handleRequests() {
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// GET methods
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app.get('*', (request, response) => {
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logger.http(request);
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response.send(getHTML());
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response.end();
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});
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app.post('/off', (request, response) => {
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logger.http(request);
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response.end();
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blinkstick.powerOff(parseInt(request.body.index));
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});
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// POST methods
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app.post('*', (request, response) => {
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logger.http(request);
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response.end();
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blinkstick.illuminate(parseRequest(request.body))
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.then(logger.info)
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.catch(logger.error);
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});
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}
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// parse the request and return an object with sane defaults
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function parseRequest(data) {
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let blinkstickConfig = {
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"id": Math.random(),
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"mode": data.mode || config.api.post.mode.default,
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"color": blinkstick.parseColor(data.color),
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"options": {
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"index": blinkstick.LEDS_ALL,
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"steps": data.steps,
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"duration": data.duration || config.api.post.duration.default,
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"pulse": {
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"max": data.pulses || 0
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}
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}
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};
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if (data.index !== undefined) {
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blinkstickConfig.options.index = parseInt(data.index);
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if (blinkstickConfig.options.index < 0) {
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blinkstickConfig.options.index = 0;
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} else if (blinkstickConfig.options.index > 7) {
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blinkstickConfig.options.index = 7;
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}
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}
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if (blinkstickConfig.options.duration < 100) {
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blinkstickConfig.options.duration = 100;
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}
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if (blinkstickConfig.options.index === blinkstick.LEDS_ALL) {
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blinkstickConfig.options.duration = blinkstickConfig.options.duration / 8;
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}
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if (blinkstickConfig.options.steps === undefined || blinkstickConfig.options.steps === 0) {
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blinkstickConfig.options.steps = blinkstickConfig.options.duration / 10;
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}
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return blinkstickConfig;
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}
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// exports
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module.exports = {
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start,
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handleRequests
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}; |