'use strict';

const mime = require('mime');
const bhttp = require('bhttp');
const { JSDOM } = require('jsdom');

async function redditAlbum(host, post) {
    const res = await bhttp.get(host.url);

    if (res.statusCode !== 200) {
        throw new Error(res.body.toString());
    }

    const { document } = new JSDOM(res.body.toString(), { runScripts: 'dangerously' }).window;
    const items = Array.from(document.querySelectorAll('li a'), el => el.href);

    return {
        album: {
            id: host.id,
            url: host.url,
            title: post.title,
        },
        items: items.map(url => ({
            id: new URL(url).pathname.match(/\/(.*).jpg/)[1],
            url,
            datetime: post.datetime,
            type: mime.getType(url) || 'image/jpeg',
        })),
    };
}

module.exports = redditAlbum;