Initial commit

lib/sortServer.ts

@@ -0,0 +1,22 @@
+import "server-only";
+import { cookies } from "next/headers";
+import { isValidSort, SORT_COOKIE, type SortKey } from "./sort";
+import { getAppSetting } from "./db/appSettings";
+
+/**
+ * Resolution order: explicit URL ?sort= > server-persisted setting > cookie > default.
+ * The cookie is fallback only (e.g. before any setting is saved); the DB value
+ * survives anything short of deleting the database.
+ */
+export async function resolveSort(urlSort?: string): Promise<SortKey> {
+  if (isValidSort(urlSort)) return urlSort;
+  const stored = getAppSetting("defaultSort");
+  if (isValidSort(stored)) return stored;
+  const cookie = (await cookies()).get(SORT_COOKIE)?.value;
+  if (isValidSort(cookie)) return cookie;
+  return "newest";
+}
+
+export function getStoredDefaultSort(): SortKey {
+  return getAppSetting("defaultSort");
+}