From 7ca698f1f92ffc238a6f899079c5b6879a4a3b2b Mon Sep 17 00:00:00 2001
From: Garrit Franke <garritfranke@gmail.com>
Date: Wed, 7 Oct 2020 19:21:23 +0200
Subject: [PATCH] feat: rss

---
 .gitignore            |  2 ++
 components/Profile.js |  2 ++
 lib/rss.js            | 82 +++++++++++++++++++++++++++++++++++++++++++
 package-lock.json     | 13 +++++++
 package.json          |  9 ++---
 5 files changed, 104 insertions(+), 4 deletions(-)
 create mode 100644 lib/rss.js

diff --git a/.gitignore b/.gitignore
index 1437c53..f0b9eee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,5 @@ yarn-error.log*
 
 # vercel
 .vercel
+
+public/rss.xml
\ No newline at end of file
diff --git a/components/Profile.js b/components/Profile.js
index a6b820d..5062f25 100644
--- a/components/Profile.js
+++ b/components/Profile.js
@@ -11,6 +11,8 @@ export default function Profile(props) {
       <Link href="https://github.com/garritfra">Github</Link>
       <br />
       <Link href="https://www.linkedin.com/in/garritfranke/">LinkedIn</Link>
+      <br />
+      <Link href="/rss.xml">Rss</Link>
       <style jsx>
         {`
           img {
diff --git a/lib/rss.js b/lib/rss.js
new file mode 100644
index 0000000..4e17087
--- /dev/null
+++ b/lib/rss.js
@@ -0,0 +1,82 @@
+const fs = require("fs");
+const path = require("path");
+
+const matter = require("gray-matter");
+const rfc822Date = require("rfc822-date");
+
+const files = fs
+  .readdirSync(path.join(__dirname, "../content/posts"))
+  .map((filename) => {
+    return {
+      filename,
+      content: fs
+        .readFileSync(path.join(__dirname, "../content/posts", filename))
+        .toString(),
+    };
+  });
+
+const keys = Array.from(files.keys());
+
+const posts = files.map((file) => {
+  // Create slug from filename
+  const slug = file.filename
+    .replace(/^.*[\\\/]/, "")
+    .split(".")
+    .slice(0, -1)
+    .join(".");
+  // Parse yaml metadata & markdownbody in document
+  const document = matter(file.content);
+  return {
+    frontmatter: document.data,
+    markdownBody: document.content,
+    slug,
+  };
+});
+
+const getRssXml = (blogPosts) => {
+  const { rssItemsXml, latestPostDate } = blogPostsRssXml(blogPosts);
+  return `<?xml version="1.0" ?>
+      <rss version="2.0">
+        <channel>
+            <title>/dev.space</title>
+            <link>https://slashdev.space</link>
+            <description>/dev.space</description>
+            <language>en</language>
+            <lastBuildDate>${rfc822Date(
+              new Date(latestPostDate)
+            )}</lastBuildDate>
+            ${rssItemsXml}
+        </channel>
+      </rss>`;
+};
+
+const blogPostsRssXml = (blogPosts) => {
+  let latestPostDate = "";
+  let rssItemsXml = "";
+  blogPosts.forEach((post) => {
+    const postDate = Date.parse(post.frontmatter.date);
+    if (!latestPostDate || postDate > Date.parse(latestPostDate)) {
+      latestPostDate = post.frontmatter.date;
+    }
+    rssItemsXml += `
+          <item>
+            <title>${post.frontmatter.title}</title>
+            <link>
+              https://slashdev.space/${post.slug}
+            </link>
+    
+            <pubDate>${rfc822Date(new Date(postDate))}</pubDate>
+            <description>
+            <![CDATA[${post.frontmatter.title}]]>
+            </description>
+        </item>`;
+  });
+  return {
+    rssItemsXml,
+    latestPostDate,
+  };
+};
+
+const feedPath = path.join(__dirname, "../public/rss.xml");
+
+fs.writeFileSync(feedPath, getRssXml(posts), { flag: "w" });
diff --git a/package-lock.json b/package-lock.json
index 292f83a..3e87fa8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4011,6 +4011,11 @@
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
       "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA=="
     },
+    "numpad": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/numpad/-/numpad-0.0.1.tgz",
+      "integrity": "sha1-x3/bZSO0HD5oEV5JSFCt0cKW2Uw="
+    },
     "object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -4720,6 +4725,14 @@
       "resolved": "https://registry.npmjs.org/rework-visit/-/rework-visit-1.0.0.tgz",
       "integrity": "sha1-mUWygD8hni96ygCtuLyfZA+ELJo="
     },
+    "rfc822-date": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/rfc822-date/-/rfc822-date-0.0.3.tgz",
+      "integrity": "sha1-we1J66+ggwfNKiEQGPltlA6XhiI=",
+      "requires": {
+        "numpad": "~0.0.1"
+      }
+    },
     "rimraf": {
       "version": "2.7.1",
       "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
diff --git a/package.json b/package.json
index b416764..b8f1a26 100644
--- a/package.json
+++ b/package.json
@@ -3,9 +3,9 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev",
-    "build": "next build && next export",
-    "start": "next start"
+    "start": "npm run build:rss && next dev",
+    "build": "npm run build:rss && next build && next export",
+    "build:rss": "node lib/rss.js"
   },
   "dependencies": {
     "glob": "^7.1.6",
@@ -14,6 +14,7 @@
     "raw-loader": "^4.0.1",
     "react": "16.13.1",
     "react-dom": "16.13.1",
-    "react-markdown": "^4.3.1"
+    "react-markdown": "^4.3.1",
+    "rfc822-date": "0.0.3"
   }
 }