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add README and comments

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adb 2 months ago
parent
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688901ae07
  1. 13
      README.md
  2. 30
      index.js

13
README.md

@ -0,0 +1,13 @@
# docs2pdf
===
simple tool to create pdfs from online documents (hedgedoc)
## install
```
npm i
```
## run script
```
node index.js "https://foo.bar"
```

30
index.js

@ -3,6 +3,7 @@ import fs from 'fs';
import moment from 'moment';
import PDFMerger from 'pdf-merger-js';
// get params from console
let [
url,
title = '',
@ -14,8 +15,10 @@ const path = './pdf';
if (!fs.existsSync(path)) fs.mkdirSync(path);
let browser;
try{
// start puppeteer
browser = await puppeteer.launch({
headless: true,
args: [
@ -26,18 +29,23 @@ try{
]
});
// open page
const page = await browser.newPage();
page.setDefaultNavigationTimeout(0);
await page.goto(url);
await Promise.any([
page.mainFrame().waitForNavigation({waitUntil: 'networkidle0'}),
new Promise(resolve => setTimeout(resolve,1000))
new Promise(resolve => setTimeout(resolve,2000))
]);
// search for header and subheader in document
if (!title) title = await (await page.waitForSelector('h1')).evaluate(el => el.textContent);
if (!subtitle) subtitle = await (await page.waitForSelector('h2')).evaluate(el => el.textContent);
console.log(title,subtitle);
const filename = `${date}_${title.trim().replaceAll(' ', '_')}`;
// deactivate @print css and add custom css (for pretty code)
await page.emulateMediaType('screen');
await page.addStyleTag({content: `
.hidden-print {
@ -48,8 +56,9 @@ try{
}
`});
// create pdf for pages
const pages = await page.pdf({
//path: `${path}/${date}_${title}_pages.pdf`,
//path: `${path}/${filename}_pages.pdf`,
format: 'A4',
margin: {
top: '20mm',
@ -82,6 +91,7 @@ try{
printBackground: true
});
// load cover template and replace values
let coverHTML = fs.readFileSync('./cover.html', {encoding: 'utf-8', flag: 'r'});
Object.entries({
@ -90,11 +100,13 @@ try{
coverHTML = coverHTML.replaceAll(`{{${key}}}`, value);
});
// open new page and set template
const page2 = await browser.newPage();
await page2.setContent(coverHTML);
// create pdf for cover
const cover = await page2.pdf({
//path: `${path}/${date}_${title}_cover.pdf`,
//path: `${path}/${filename}_cover.pdf`,
format: 'A4',
margin: {
top: '20mm',
@ -104,16 +116,20 @@ try{
}
});
// close puppeteer
await browser.close();
// merge both pdfs and save
const merger = new PDFMerger();
merger.add(cover);
merger.add(pages);
await merger.save(`${path}/${date}_${title.trim().replaceAll(' ', '_')}.pdf`)
await merger.save(`${path}/${filename}.pdf`)
console.log('finished');
console.log(`saved at ${path}/${filename}.pdf`);
} catch (e) {
// try to close browser on exception
if (browser) await browser.close();
throw e;
console.error(e);
}
console.log('finished');

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