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packages/website/src/seo.ts

@@ -0,0 +1,34 @@
+import routesFile from './seo.routes.json';
+
+export const SITE_ORIGIN = routesFile.origin;
+
+export type SeoRoute = {
+  path: string;
+  title: string;
+  description: string;
+  index: boolean;
+};
+
+export const INDEXABLE_ROUTES: SeoRoute[] = routesFile.routes.map((r) => ({
+  ...r,
+  index: true,
+}));
+
+export const NOT_FOUND_SEO: SeoRoute = {
+  path: '',
+  title: 'Page not found — LexAI',
+  description: 'That address is not a LexAI page.',
+  index: false,
+};
+
+const byPath = new Map(INDEXABLE_ROUTES.map((r) => [r.path, r]));
+
+export function seoForPath(pathname: string): SeoRoute {
+  const normalized = pathname.replace(/\/+$/, '') || '/';
+  return byPath.get(normalized) ?? NOT_FOUND_SEO;
+}
+
+export function canonicalUrl(path: string): string {
+  if (!path || path === '/') return `${SITE_ORIGIN}/`;
+  return `${SITE_ORIGIN}${path.startsWith('/') ? path : `/${path}`}`;
+}