added feeds

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+package-lock.json

index.html

@@ -148,7 +148,9 @@
             <h1>Blog</h1>
             <p>
                 Occasionally I enjoy writing stuff. So here's some of the stuff I've written. Just click on any of the headers to expand the post.
+                <br>Alternatively, you can subscribe to this blog using <a href="/rss.xml">RSS</a>, <a href="/atom.xml">Atom</a> or <a href="/feed.json">JSON</a>.
             </p>
+
             <div id="blog-list">
                 <em>The content that should be here is dynamically generated. Please enable JavaScript if you see this.</em>
             </div>

node/rss.js

@@ -0,0 +1,75 @@
+const {
+    Feed
+} = require("feed");
+const fs = require("fs");
+const showdown = require("showdown");
+const converter = new showdown.Converter({
+    parseImgDimensions: true
+});
+
+module.exports = function (app) {
+    app.get('/rss.xml', function (_req, res) {
+        createFeed(function (feed) {
+            res.header('Content-Type', 'application/xml');
+            res.send(feed.rss2());
+        });
+    });
+    app.get('/feed.json', function (_req, res) {
+        createFeed(function (feed) {
+            res.header('Content-Type', 'application/json');
+            res.send(feed.json1());
+        });
+    });
+    app.get('/atom.xml', function (_req, res) {
+        createFeed(function (feed) {
+            res.header('Content-Type', 'application/xml');
+            res.send(feed.atom1());
+        });
+    })
+}
+
+function createFeed(callback) {
+    const feed = new Feed({
+        title: "Ellpeck's Blog",
+        description: "Occasionally I enjoy writing stuff. So here's some of the stuff I've written about gaming, programming and life.",
+        id: "https://ellpeck.de",
+        link: "https://ellpeck.de",
+        image: "https://ellpeck.de/res/logo.png",
+        favicon: "https://ellpeck.de/favicon.ico",
+        feedLinks: {
+            json: "https://ellpeck.de/feed.json",
+            atom: "https://ellpeck.de/atom.xml"
+        },
+        author: {
+            name: "Ellpeck",
+            email: "me@ellpeck.de",
+            link: "https://ellpeck.de"
+        }
+    });
+
+    fs.readFile(__dirname + "/../blog/posts.json", function (_, data) {
+        var json = JSON.parse(data);
+        for (let i = json.length - 1; i >= 0; i--) {
+            var post = json[i];
+            var id = post["id"];
+            var date = new Date(post["date"]);
+
+            fs.readFile(__dirname + "/../blog/" + id + ".md", function (_, content) {
+                var html = converter.makeHtml(content.toString());
+                feed.addItem({
+                    title: post["name"],
+                    id: id,
+                    link: "https://ellpeck.de/#blog-" + id,
+                    description: post["summary"],
+                    content: html,
+                    date: date,
+                    published: date
+                });
+
+                if (i == 0) {
+                    callback(feed);
+                }
+            });
+        }
+    });
+}

node/server.js

@@ -0,0 +1,6 @@
+const express = require("express");
+
+var app = express();
+require("./rss")(app);
+require("./sitemap")(app);
+app.listen(3000);

node/sitemap.js

@@ -1,11 +1,10 @@
-const express = require('express');
 const {
     createSitemap
 } = require('sitemap');
 const fs = require("fs");
 
-let app = express();
-app.get('/sitemap.xml', function (_req, res) {
+module.exports = function (app) {
+    app.get('/sitemap.xml', function (_req, res) {
         let sitemap = createSitemap({
             hostname: 'https://ellpeck.de',
             urls: [{
@@ -34,6 +33,7 @@ app.get('/sitemap.xml', function (_req, res) {
 
         fs.readFile(__dirname + "/../blog/posts.json", function (_, data) {
             var json = JSON.parse(data);
+
             for (var post of json) {
                 sitemap.add({
                     url: "/#blog-" + post["id"],
@@ -44,5 +44,5 @@ app.get('/sitemap.xml', function (_req, res) {
             res.header('Content-Type', 'application/xml');
             res.send(sitemap.toXML());
         });
-});
-app.listen(3000);
+    });
+}