Create use cases pages

lib/useCaseSyntheticPost.ts

@@ -0,0 +1,61 @@
+import type { BlogPost } from "./content";
+import { markdownToHtml } from "./content";
+import type useCasesDetail from "../messages/en/pages/useCasesDetail.json";
+
+export const USE_CASE_DETAIL_SLUGS = [
+  "mutual-aid-colorado",
+  "food-not-bombs",
+  "boulder-county-street-medics",
+] as const;
+
+export type UseCaseDetailSlug = (typeof USE_CASE_DETAIL_SLUGS)[number];
+
+type UseCasesDetailMessages = typeof useCasesDetail;
+
+export type UseCaseDetailContentKey = keyof UseCasesDetailMessages;
+
+const SLUG_TO_CONTENT_KEY: Record<UseCaseDetailSlug, UseCaseDetailContentKey> = {
+  "mutual-aid-colorado": "mutualAidColorado",
+  "food-not-bombs": "foodNotBombs",
+  "boulder-county-street-medics": "boulderCountyStreetMedics",
+};
+
+export function isUseCaseDetailSlug(slug: string): slug is UseCaseDetailSlug {
+  return (USE_CASE_DETAIL_SLUGS as readonly string[]).includes(slug);
+}
+
+export function useCaseContentKeyForSlug(
+  slug: UseCaseDetailSlug,
+): UseCaseDetailContentKey {
+  return SLUG_TO_CONTENT_KEY[slug];
+}
+
+export function buildUseCaseSyntheticPost(
+  slug: UseCaseDetailSlug,
+  detail: UseCasesDetailMessages,
+): BlogPost {
+  const contentKey = useCaseContentKeyForSlug(slug);
+  const entry = detail[contentKey];
+  const { banner, bodyMarkdown } = entry;
+
+  return {
+    slug: `__use-case__:${slug}`,
+    frontmatter: {
+      title: banner.title,
+      description: banner.description,
+      author: banner.author,
+      date: banner.date,
+    },
+    content: bodyMarkdown,
+    htmlContent: markdownToHtml(bodyMarkdown),
+    filePath: `messages/en/pages/useCasesDetail.json#${contentKey}`,
+    lastModified: new Date(banner.date),
+  };
+}
+
+export function getUseCaseDetailEntry(
+  slug: UseCaseDetailSlug,
+  detail: UseCasesDetailMessages,
+) {
+  return detail[useCaseContentKeyForSlug(slug)];
+}