Fall back to OMDb demo on rate limits

src/lib/server/omdb.ts

@@ -4,6 +4,9 @@ import type { MediaDetails } from '#lib/media/types';
 const cacheDuration = 24 * 60 * 60 * 1000;
 const imdbIdPattern = /tt\d+/;
 const missingValue = 'N/A';
+const omdbUrl = 'https://www.omdbapi.com/';
+const omdbDemoUrl = 'http://www.omdbapi.com/demo.aspx/';
+const rateLimitedStatus = 401;
 
 interface OmdbResponse {
 	Response: 'True' | 'False';
@@ -35,13 +38,21 @@ function toMediaDetails(result: OmdbResponse): MediaDetails {
 	};
 }
 
+async function requestOmdb(imdbId: string): Promise<Response> {
+	const params = new URLSearchParams({ apikey: OMDB_API_KEY ?? '', i: imdbId, plot: 'short' });
+	const response = await fetch(`${omdbUrl}?${params}`);
+	if (response.status !== rateLimitedStatus) return response;
+
+	const demoParams = new URLSearchParams({ i: imdbId, token: 'demo' });
+	return fetch(`${omdbDemoUrl}?${demoParams}`);
+}
+
 async function fetchDetails(imdbId: string): Promise<MediaDetails | null> {
 	const cached = detailsCache.get(imdbId);
 	if (cached && Date.now() - cached.fetchedAt < cacheDuration) return cached.details;
 
 	try {
-		const params = new URLSearchParams({ apikey: OMDB_API_KEY ?? '', i: imdbId, plot: 'short' });
-		const response = await fetch(`https://www.omdbapi.com/?${params}`);
+		const response = await requestOmdb(imdbId);
 		if (!response.ok) throw new Error(`OMDb returned ${response.status}`);
 
 		const result: OmdbResponse = await response.json();