import fs from 'fs';

import { Feed } from 'feed';

import { blogpostsDetails } from '../src/components/blog/blogpostsDetails.js';

import path from 'path';

import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);

const __dirname = path.dirname(__filename);

const outputDir = path.join(__dirname, '../static');

if (!fs.existsSync(outputDir)) {

fs.mkdirSync(outputDir, { recursive: true });

}

const generateAtomFeedFromBlogDetails = (feed, blogpostsDetails, nbOfBlogPosts) => {

let posts = [];

for (let i = 0; i < nbOfBlogPosts; i++) {

const blogpost = blogpostsDetails[i];

posts.push({

title: blogpost.title,

link: blogpost.url,

summary: blogpost.summary,

date: new Date(blogpost.date),

authors: blogpost.authors,

image: blogpost.image

})

};

posts.forEach((post) => {

const image = `<img src="${post.image}" alt="Image for ${post.title}" style="max-width:100%; height:auto;" />`;

const summary = `<p>${post.summary}</p>`;

feed.addItem({

title: post.title,

id: post.link,

link: post.link,

date: new Date(post.date),

author: [{ name: post.authors}],

content: `${image}${summary}`

});

})

return feed;

}

const AtomFeedLast20 = new Feed({

title: 'Recent blog posts featured by QuantStack team',

description: 'Atom feed for QuantStack website blog page',

id: 'https://quantstack.net/',

link: 'https://quantstack.net/',

language: 'en',

updated: new Date(),

feedLinks: {

atom: 'https://quantstack.net/atom.xml',

},

author: {

name: 'QuantStack Team',

link: 'https://quantstack.net',

},

});

const updatedFeedLast20 = generateAtomFeedFromBlogDetails(AtomFeedLast20, blogpostsDetails, 20);

const xml = updatedFeedLast20.atom1();

fs.writeFileSync(path.join(outputDir, 'atom.xml'), xml);

const AtomFeedAll = new Feed({

title: 'All blog posts featured by QuantStack team',

description: 'Atom feed for QuantStack website blog page',

feed_url: 'https://quantstack.net/atom_all.xml',

site_url: 'https://quantstack.net',

language: 'en',

});

const updatedFeedAll = generateAtomFeedFromBlogDetails(AtomFeedAll, blogpostsDetails, blogpostsDetails.length)

fs.writeFileSync(path.join(outputDir, 'atom_all.xml'), updatedFeedAll.atom1({ indent: true }));