Web/node/sitemap.js

const {
    createSitemap
} = require('sitemap');
const fs = require("fs");

module.exports = function () {
    let folder = __dirname + "/../";
    fs.watchFile(folder + "blog/posts.json", function (curr, prev) {
        if (curr.mtime == prev.mtime)
            return;
        console.log("Refreshing sitemap...");

        let sitemap = createSitemap({
            hostname: 'https://ellpeck.de',
            urls: [{
                    url: '/',
                    priority: 0.8
                },
                {
                    url: '/#projects',
                    changefreq: 'monthly'
                },
                {
                    url: '/#social',
                    changefreq: 'yearly'
                },
                {
                    url: '/#about',
                    changefreq: 'monthly'
                },
                {
                    url: '/#blog',
                    changefreq: 'weekly',
                    priority: 0.6
                }
            ]
        });

        fs.readFile(folder + "blog/posts.json", function (_, data) {
            let json = JSON.parse(data);

            for (let post of json) {
                sitemap.add({
                    url: "/blog-" + post["id"],
                    priority: 0.4
                });
            }

            fs.writeFile(folder + "/sitemap.xml", sitemap.toXML(), function (_, _) {});
        });
    });
}