A nodeJs script that loops on a list of files and create a google podcasts rss feed file

feed.rss

<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
    xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
  <channel>
    <title></title>
    <itunes:author></itunes:author>
    <description></description>
    <itunes:image href="link to a picture"/>
    <language>ar</language>
      <item>
        <title>سورة الفاتحة - 1</title>
        <enclosure url="link to mp3 file" length="int value of size in bytes"
                 type="audio/mpeg"/>
      </item>
   </channel>
</rss>

index.js

const fs = require('fs');

// Util methods to create xml-like tags
const wrap = (tagName, value) => `<${tagName}>${value}</${tagName}>`;

const enclose = (tagName, attributes) => {
    const attrString = Array.from(attributes.entries())
      .map(([key, value]) => `${key}="${value}"`)
      .join(' ');
    return `<${tagName} ${attrString}/>`;
  };

// Util method to write to a file.
const write = (fileName, content) => fs.writeFile(fileName, content, (err) => {
    if (err) {
      console.error(err);
      return;
    }
    console.log('File has been written!');
  });

// Util method to get the size of a file in bytes
const getLength = (filePath) => {
    return new Promise((resolve, reject) => {
        fs.stat(filePath, function (err, stats) {
            if (err) {
                reject(err);
            } else {
                resolve(stats.size);
            }
        });
    });
}

const rootUrl = "https://firebasestorage.googleapis.com/v0/b/project";
const rootFolder = "C:\\Users\\Kotbi Abderrahmane\\files\\";
async function main() {
    const map = new Map();
    let items = `
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
    xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">
  <channel>
    <title><title>
    <itunes:author></itunes:author>
    <description></description>
    <itunes:image href="https://firebasestorage.googleapis.com/v0/b/picture.jpg"/>
    <language>ar</language>
    `;
    const promises = [];
    for (let index = 1; index < 115; index++) {
        const number = String(index).padStart(3, '0')
        const fileName = `${rootFolder + number}.mp3`
        const url = `${rootUrl}F001.mp3`
        const promise = getLength(fileName).then((fileLength) => {
            map.set("length", fileLength).set("url", url).set("type", "audio/mpeg")
            items += wrap("item", "\n\t\t\t" + [wrap("title", number) + "\n\t\t\t" + enclose("enclosure", map) + "\n\t\t"]) + "\n\t\t"
        }).catch((err) => {
            console.error(err);
        });
        promises.push(promise);
    }
    await Promise.allSettled(promises);
    items = items.slice(0, -2) + "\t</channel>\n"+ "</rss>";
    write("file.xml", items) 
};

main();
 

rules.js

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /{allPaths=**} {
      allow read: if true;
      allow write: if false;
    }
  }
}