Script for formatting Libby highlights (.json) as Markdown (.md).

format_libby_highlights.mjs

#!/usr/bin/env node

/* SPDX-License-Identifier: BlueOak-1.0.0 */

import { readFileSync, writeFileSync } from 'fs';

const args = process.argv.slice(2);

const srcPath = new URL(args[0], import.meta.url);
const dstPath = new URL(args[1], import.meta.url);

//

const json = JSON.parse(readFileSync(srcPath, 'utf-8'));

if (json.version !== 1) {
	console.warn(`Expected version 1, found version ${json.version}`);
}

//

const meta = json.readingJourney;

const md = `
# ${json.readingJourney.title.text}

## Metadata

| author | publisher | isbn |
|--------|-----------|------|
| ${formatCell(meta.author)} | ${formatCell(meta.publisher)} | ${meta.isbn} |

## Highlights

${
	json.highlights
		.sort((a, b) => a.percent - b.percent)
		.map(formatHighlight)
		.join('\n\n***\n\n')
}
`.trim();

writeFileSync(dstPath, md, 'utf-8');

///////// UTILS /////////

function formatHighlight({quote, chapter, percent}) {
	return `
${quote}

| chapter    | percent    |
|------------|------------|
| ${formatCell(chapter)} | ${percent.toFixed(3)} |
		`.trim();
}

function formatCell(text) {
	return text.replace('|', '\\|');
}