feat: add dnd.ts helper, make resolveRelatedPosts generic in md.ts

www/src/lib/dnd.ts

@@ -0,0 +1,34 @@
+import type { CollectionEntry } from 'astro:content';
+import { getSlug, resolveRelatedPosts } from './md';
+
+type DndPost = CollectionEntry<'dnd'>;
+
+export { getSlug, resolveRelatedPosts };
+
+export function organizePostsByCategory(posts: DndPost[]): {
+  grouped: Record<string, DndPost[]>;
+  categories: string[];
+} {
+  const grouped = posts.reduce((acc, post) => {
+    const category = post.data.category ?? 'dnd';
+    if (!acc[category]) acc[category] = [];
+    acc[category].push(post);
+    return acc;
+  }, {} as Record<string, DndPost[]>);
+
+  const categories = Object.keys(grouped).sort((a, b) => {
+    if (a === 'dnd') return -1;
+    if (b === 'dnd') return 1;
+    return a.localeCompare(b);
+  });
+
+  for (const category of categories) {
+    grouped[category] = grouped[category].slice().sort((a, b) => {
+      if (a.data.pinned && !b.data.pinned) return -1;
+      if (!a.data.pinned && b.data.pinned) return 1;
+      return a.data.title.localeCompare(b.data.title);
+    });
+  }
+
+  return { grouped, categories };
+}

www/src/lib/md.ts

@@ -42,10 +42,10 @@ function sortPosts(posts: PostWithDates[], { alphabetically = false } = {}): Pos
   });
 }
 
-export function resolveRelatedPosts(
+export function resolveRelatedPosts<T extends { id: string }>(
   slugs: string[],
-  allPosts: PostWithDates[],
+  allPosts: T[],
-): PostWithDates[] {
+): T[] {
   const bySlug = new Map(allPosts.map(p => [getSlug(p.id), p]));
   return slugs.flatMap(s => bySlug.get(s) ?? []);
 }