gm4ebnr3j: Add three-column layout with featured experts and trending minnects rails

src/lib/discover-client.ts

@@ -0,0 +1,32 @@
+// Browser-side reader for the same-origin GET /api/discover route.
+import type { DiscoverData } from "./discover";
+
+export class DiscoverLoadError extends Error {
+  constructor() {
+    super("discover_unavailable");
+  }
+}
+
+const arr = <T>(v: unknown): T[] => (Array.isArray(v) ? (v as T[]) : []);
+
+export async function fetchDiscover(
+  fetchImpl: typeof fetch = fetch,
+): Promise<DiscoverData> {
+  let res: Response;
+  try {
+    res = await fetchImpl("/api/discover", { credentials: "same-origin" });
+  } catch {
+    throw new DiscoverLoadError();
+  }
+  if (!res.ok) throw new DiscoverLoadError();
+  try {
+    const body = (await res.json()) as Record<string, unknown>;
+    return {
+      featuredExperts: arr(body.featuredExperts),
+      trendingMinnects: arr(body.trendingMinnects),
+      categories: arr(body.categories),
+    };
+  } catch {
+    throw new DiscoverLoadError();
+  }
+}