From fc05bcc9cec407ec79a2e01d9f5a1500347cd268 Mon Sep 17 00:00:00 2001
From: Andrea Vos <andrea@avris.it>
Date: Tue, 18 Jun 2024 16:22:05 +0000
Subject: [PATCH] Blog feed

---
 middleware/atom.js | 49 ++++++++++++++++++++++++++++++++++++++++++++++
 nuxt.config.ts     |  1 +
 package.json       |  1 +
 pnpm-lock.yaml     | 21 ++++++++++++++++++++
 routes/blog.vue    | 14 ++++++++++---
 server/no-ssr.ts   |  2 +-
 6 files changed, 84 insertions(+), 4 deletions(-)
 create mode 100644 middleware/atom.js

diff --git a/middleware/atom.js b/middleware/atom.js
new file mode 100644
index 000000000..6a1d531e8
--- /dev/null
+++ b/middleware/atom.js
@@ -0,0 +1,49 @@
+import { Feed } from 'feed';
+import parseMarkdown from '../src/parseMarkdown.js';
+import fetch from 'node-fetch';
+
+export default async function ({ app, route, res }) {
+    if (!process.server || route.path !== '/blog.atom') {
+        return;
+    }
+
+    const posts = await (await fetch(`${process.env.BASE_URL}/api/blog`)).json();
+
+    const feed = new Feed({
+        title: `${app.$t('title')} • ${app.$t('links.blog')}`,
+        description: app.$t('description'),
+        id: process.env.BASE_URL,
+        link: `${process.env.BASE_URL}/blog.atom`,
+        language: app.$config.locale,
+        image: `${process.env.BASE_URL}/icon.png`,
+        favicon: `${process.env.BASE_URL}/icon.png`,
+        updated: new Date(posts[0].date),
+    });
+
+    for (const post of posts) {
+        const parsed = await parseMarkdown(
+            (await import(`../locale/${app.$config.locale}/blog/${post.slug}.md`)).default,
+            app.$translator,
+        );
+
+        feed.addItem({
+            title: post.title,
+            id: `${process.env.BASE_URL}/${app.$config.links.blogRoute}/${post.slug}`,
+            link: `${process.env.BASE_URL}/${app.$config.links.blogRoute}/${post.slug}`,
+            description: parsed.intro,
+            content: parsed.content,
+            author: post.authors.map((author) => ({
+                name: author,
+                link: author.startsWith('@') ? `${process.env.BASE_URL}/${author}` : undefined,
+            })),
+            date: new Date(post.date),
+            image: post.hero ? `${process.env.BASE_URL}${post.hero}` : undefined,
+        });
+    }
+
+
+    res.setHeader('Content-Type', 'application/rss+xml; charset=utf-8');
+    res.end(feed.atom1());
+
+    return new Promise(() => {}); // halt execution
+}
diff --git a/nuxt.config.ts b/nuxt.config.ts
index 6239ab287..d2d8977d5 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -628,6 +628,7 @@ const nuxtConfig: NuxtConfig = {
 
             routes.push({ name: 'all', path: '*', component: resolve(__dirname, 'routes/pronoun.vue') });
         },
+        middleware: 'atom',
     },
     hooks: {
         render: {
diff --git a/package.json b/package.json
index 97a8ce9b2..818c3de07 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
         "dotenv": "^8.2.0",
         "express": "^4.17.1",
         "express-session": "^1.17.1",
+        "feed": "^4.2.2",
         "generic-diff": "^1.0.1",
         "grant": "^5.4.22",
         "he-date": "^1.2.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d26d32458..34043ceb6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -74,6 +74,9 @@ dependencies:
   express-session:
     specifier: ^1.17.1
     version: 1.17.3
+  feed:
+    specifier: ^4.2.2
+    version: 4.2.2
   generic-diff:
     specifier: ^1.0.1
     version: 1.0.1
@@ -8955,6 +8958,13 @@ packages:
       pend: 1.2.0
     dev: false
 
+  /feed@4.2.2:
+    resolution: {integrity: sha512-u5/sxGfiMfZNtJ3OvQpXcvotFpYkL0n9u9mM2vkui2nGo8b4wvDkJ8gAkYqbA8QpGyFCv3RK0Z+Iv+9veCS9bQ==}
+    engines: {node: '>=0.4.0'}
+    dependencies:
+      xml-js: 1.6.11
+    dev: false
+
   /figgy-pudding@3.5.2:
     resolution: {integrity: sha512-0btnI/H8f2pavGMN8w40mlSKOfTK2SVJmBfBeVIj3kNw0swwgzyRq0d5TJVOwodFmtvpPeWPN/MCcfuWF0Ezbw==}
     deprecated: This module is no longer supported.
@@ -14867,6 +14877,10 @@ packages:
       chokidar: 3.5.3
     dev: true
 
+  /sax@1.4.1:
+    resolution: {integrity: sha512-+aWOz7yVScEGoKNd4PA10LZ8sk0A/z5+nXQG5giUO5rprX9jgYsTdov9qCchZiPIZezbZH+jRut8nPodFAX4Jg==}
+    dev: false
+
   /saxes@6.0.0:
     resolution: {integrity: sha512-xAg7SOnEhrm5zI3puOOKyy1OMcMlIJZYNJY7xLBwSze0UjhPLnWfj2GF2EpT0jmzaJKIWKHLsaSSajf35bcYnA==}
     engines: {node: '>=v12.22.7'}
@@ -17116,6 +17130,13 @@ packages:
       utf-8-validate:
         optional: true
 
+  /xml-js@1.6.11:
+    resolution: {integrity: sha512-7rVi2KMfwfWFl+GpPg6m80IVMWXLRjO+PxTq7V2CDhoGak0wzYzFgUY2m4XJ47OGdXd8eLE8EmwfAmdjw7lC1g==}
+    hasBin: true
+    dependencies:
+      sax: 1.4.1
+    dev: false
+
   /xml-name-validator@4.0.0:
     resolution: {integrity: sha512-ICP2e+jsHvAj2E2lIHxa5tjXRlKDJo4IdvPvCXbXQGdzSfmSpNVyIKMvoZHjDY9DP0zV17iI85o90vRFXNccRw==}
     engines: {node: '>=12'}
diff --git a/routes/blog.vue b/routes/blog.vue
index 28cd4debb..f0c4d5a2a 100644
--- a/routes/blog.vue
+++ b/routes/blog.vue
@@ -1,8 +1,16 @@
 <template>
     <Page>
-        <h2>
-            <Icon v="pen-nib" />
-            <T>links.blog</T>
+        <h2 class="d-flex justify-content-between">
+            <span>
+                <Icon v="pen-nib" />
+                <T>links.blog</T>
+            </span>
+            <span>
+                <a href="/blog.atom" target="_blank" rel="noopener" class="btn btn-sm btn-outline-primary">
+                    <Icon v="rss" />
+                    Feed
+                </a>
+            </span>
         </h2>
         <AdPlaceholder :phkey="['content-0', 'content-mobile-0']" />
         <BlogEntriesList :posts="posts" details />
diff --git a/server/no-ssr.ts b/server/no-ssr.ts
index 03f593756..97d7237ec 100644
--- a/server/no-ssr.ts
+++ b/server/no-ssr.ts
@@ -16,7 +16,7 @@ const isBrowser = (userAgent: string | undefined): boolean => {
 };
 
 export default function (req: Request, res: Response, next: NextFunction): void {
-    if (process.env.NODE_ENV === 'production' && !req.url.startsWith('/card/@')) {
+    if (process.env.NODE_ENV === 'production' && !req.url.startsWith('/card/@') && !req.url.startsWith('/blog.atom')) {
         res.spa = isBrowser(req.headers['user-agent']) || isHighLoadTime(global.config.locale);
     }
     next();