feat: add loading of recommendations to movie page

lib/recommendation.ts

@@ -1,5 +1,6 @@
 import * as cache from "@lib/cache/cache.ts";
 import * as openai from "@lib/openai.ts";
+import * as tmdb from "@lib/tmdb.ts";
 import { GenericResource } from "@lib/types.ts";
 import { parseRating } from "@lib/helpers.ts";
 
@@ -57,11 +58,39 @@ export async function createRecommendationResource(
   cache.set(cacheId, JSON.stringify(resource));
 }
 
-export function getRecommendation(id: string, type: string) {
-  return cache.get(`recommendations:${type}:${id}`);
+export async function getRecommendation(
+  id: string,
+  type: string,
+): Promise<RecommendationResource | null> {
+  const res = await cache.get(`recommendations:${type}:${id}`) as string;
+  try {
+    return JSON.parse(res);
+  } catch (_) {
+    return null;
+  }
 }
 
-export async function getAllRecommendations() {
+export async function getSimilarMovies(id: string) {
+  const recs = await getRecommendation(id, "movie");
+  if (!recs?.keywords?.length) return;
+
+  const recommendations = await openai.getMovieRecommendations(
+    recs.keywords.join(),
+    [recs.id],
+  );
+  if (!recommendations) return;
+
+  const movies = await Promise.all(recommendations.map(async (rec) => {
+    const m = await tmdb.searchMovie(rec.title, rec.year);
+    return m?.results?.[0];
+  }));
+
+  return movies.filter(Boolean);
+}
+
+export async function getAllRecommendations(): Promise<
+  RecommendationResource[]
+> {
   const keys = await cache.keys("recommendations:movie:*");
   return Promise.all(keys.map((k) => cache.get(k))).then((res) =>
     res.map((r) => JSON.parse(r))