From 924e45ef7a50cab052e7a3609ae5cb2923d2a6cf Mon Sep 17 00:00:00 2001
From: Sebastian Sdorra <s.sdorra@gmail.com>
Date: Sat, 11 May 2024 20:58:04 +0200
Subject: [PATCH] chore(website): add sitemap to website

---
 website/app/robots.ts          |  2 ++
 website/app/sitemap.ts         | 28 +++++++++++++++++++++++++
 website/content-collections.ts | 37 ++++++++++++++++++++++++++++++++--
 website/lib/env.ts             |  1 +
 4 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 website/app/sitemap.ts
 create mode 100644 website/lib/env.ts

diff --git a/website/app/robots.ts b/website/app/robots.ts
index fc42c639..101eb95f 100644
--- a/website/app/robots.ts
+++ b/website/app/robots.ts
@@ -1,3 +1,4 @@
+import { FQDN } from "@/lib/env";
 import { MetadataRoute } from "next";
 
 export default function robots(): MetadataRoute.Robots {
@@ -6,5 +7,6 @@ export default function robots(): MetadataRoute.Robots {
       userAgent: "*",
       allow: "/",
     },
+    sitemap: `${FQDN}/sitemap.xml`,
   };
 }
diff --git a/website/app/sitemap.ts b/website/app/sitemap.ts
new file mode 100644
index 00000000..44b96eb0
--- /dev/null
+++ b/website/app/sitemap.ts
@@ -0,0 +1,28 @@
+import { FQDN } from "@/lib/env";
+import { allDocs, allQuickstarts, allSamples } from "content-collections";
+import { MetadataRoute } from "next";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  return [
+    {
+      url: `${FQDN}/`,
+      lastModified: new Date(),
+      priority: 1,
+    },
+    ...allQuickstarts.map((quickstart) => ({
+      url: `${FQDN}/${quickstart.href}`,
+      lastModified: quickstart.lastModified,
+      priority: 0.8,
+    })),
+    ...allDocs.map((docPage) => ({
+      url: `${FQDN}/${docPage.href}`,
+      lastModified: docPage.lastModified,
+      priority: 0.7,
+    })),
+    ...allSamples.map((sample) => ({
+      url: `${FQDN}/${sample.href}`,
+      lastModified: sample.lastModified,
+      priority: 0.7,
+    })),
+  ];
+}
diff --git a/website/content-collections.ts b/website/content-collections.ts
index ce681002..39d3ef5f 100644
--- a/website/content-collections.ts
+++ b/website/content-collections.ts
@@ -1,10 +1,21 @@
-import { defineCollection, defineConfig } from "@content-collections/core";
+import {
+  Context,
+  Meta,
+  defineCollection,
+  defineConfig,
+  Document,
+} from "@content-collections/core";
 import rehypeSlug from "rehype-slug";
 import rehypeShiki from "@shikijs/rehype";
 import { Options, compileMDX } from "@content-collections/mdx";
 import { selectAll } from "hast-util-select";
 import { Root } from "hast";
 import GithubSlugger from "github-slugger";
+import { exec as cpExec } from "node:child_process";
+import { promisify } from "node:util";
+import path from "node:path";
+
+const exec = promisify(cpExec);
 
 function liCodeSlug() {
   return (tree: Root) => {
@@ -20,6 +31,26 @@ function liCodeSlug() {
   };
 }
 
+async function lastModificationDate(ctx: Context, document: Document) {
+  return ctx.cache(
+    // TODO: this is a dirty hack to avoid cache key conflicts
+    // we should find a way which handles this automatically
+    { key: "_git_last_modified", ...document },
+    async (document) => {
+      const filePath = path.join(
+        ctx.collection.directory,
+        document._meta.filePath
+      );
+
+      const { stdout } = await exec(`git log -1 --format=%ai -- ${filePath}`);
+      if (stdout) {
+        return new Date(stdout.trim()).toISOString();
+      }
+      return new Date().toISOString();
+    }
+  );
+}
+
 const mdxOptions: Options = {
   rehypePlugins: [
     liCodeSlug,
@@ -57,6 +88,7 @@ const quickstart = defineCollection({
       name,
       body,
       category: data.category,
+      lastModified: await lastModificationDate(ctx, data),
     };
   },
 });
@@ -89,11 +121,11 @@ const samples = defineCollection({
       name,
       body,
       tags: data.tags,
+      lastModified: await lastModificationDate(ctx, data),
     };
   },
 });
 
-
 const docs = defineCollection({
   name: "docs",
   directory: "../docs",
@@ -126,6 +158,7 @@ const docs = defineCollection({
       body,
       href,
       slug,
+      lastModified: await lastModificationDate(ctx, data),
     };
   },
 });
diff --git a/website/lib/env.ts b/website/lib/env.ts
new file mode 100644
index 00000000..7d7c79c8
--- /dev/null
+++ b/website/lib/env.ts
@@ -0,0 +1 @@
+export const FQDN = "https://www.content-collections.dev";
\ No newline at end of file