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build-binary-decoder.js
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const fs = require('fs');
const path = require('path');
const BUILD_ALL = Boolean(process.env.BUILD_ALL)
const DEFAULT_MAX_DEPTH = 10;
const outputDir = path.join(__dirname, '..', 'dist');
function getAllStates(maxDepth = 3) {
let allStates = new Set();
const curStates = new Set(['1']);
allStates = getNextStates(allStates, curStates, 0, maxDepth);
return allStates;
}
function getNextStates(allStates, curStates, curDepth, maxDepth) {
if (curDepth >= maxDepth) {
return allStates;
}
const newStates = new Set();
curStates.forEach(state => {
newStates.add(`${state}0`);
newStates.add(`${state}1`);
});
return getNextStates(new Set([...allStates, ...newStates]), newStates, curDepth + 1, maxDepth);
}
function statesToHtml(states) {
return states.map(state => {
const decimalNumber = parseInt(state, 2);
const next0StateName = `s${state}0`;
const next1StateName = `s${state}1`;
return `<input type="radio" name="app-state" id="s${state}">
<div class="state">
<div class="answer" data-bin="${state}" data-dec="${decimalNumber}"></div>
<label for="${next0StateName}">0</label>
<label for="${next1StateName}">1</label>
</div>`;
}).join('\n');
}
function buildDecoderHtml(maxDepth) {
console.log(`~~~~ Building Binary Decoder (depth=${maxDepth}) ~~~`);
const startTime = +new Date();
const allStates = getAllStates(maxDepth);
const endTime = +new Date();
console.log(' Found ', allStates.size, 'states in ', (endTime - startTime), 'milliseconds');
console.log(' Mapping to html states...');
const statesHtml = statesToHtml(Array.from(allStates));
const htmlTemplate = `
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>CSS Binary Decoder</title>
<link href="./styles.css" rel="stylesheet"></head>
</head>
<body>
<div class="app">
<h1>Binary Decoder</h1>
<p>This app is built entirely out of HTML and CSS, no JavaScript™ at all!</p>
<br><br>
<div class="stateContainer">
<input type="radio" name="app-state" id="start" checked>
<div class="state">
<div class="answer" data-bin="1" data-dec="1" ></div>
<label for="s10">0</label>
<label for="s11">1</label>
</div>
${statesHtml}
<label for="start" id="resetButton">Reset</label>
</div>
</div>
<footer class="footer">Check out <a href="https://github.com/lukebatchelor/css-binary-decoder">lukebatchelor/css-binary-decoder</a> if you're interested in how it works!</footer>
<a href="https://github.com/lukebatchelor/css-binary-decoder" class="github-corner" aria-label="View source on Github"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
</body>
</html>
`;
const fileName = maxDepth === 10 ? 'index.html' : `${maxDepth}.html`;
const outputFilePath = path.join(outputDir, fileName);
console.log(' Writing to', outputFilePath);
fs.writeFileSync(outputFilePath, htmlTemplate);
console.log(' Total size: ', (htmlTemplate.length / 1000000).toFixed(2), 'mb');
}
if (BUILD_ALL) {
const depths = [8,9,10,11,12,13,14];
depths.forEach(depth => {
buildDecoderHtml(depth);
});
} else {
buildDecoderHtml(DEFAULT_MAX_DEPTH);
}