feat: get image from tmdb

lib/tmdb.ts

@@ -1,3 +1,4 @@
+import * as cache from "@lib/cache/cache.ts";
 import { MovieDb } from "https://esm.sh/moviedb-promise@3.4.1";
 const moviedb = new MovieDb(Deno.env.get("TMDB_API_KEY") || "");
 
@@ -12,3 +13,16 @@ export function getMovie(id: number) {
 export function getMovieCredits(id: number) {
   return moviedb.movieCredits(id);
 }
+
+export async function getMoviePoster(id: string): Promise<ArrayBuffer> {
+  const cachedPoster = await cache.get("posters/" + id);
+
+  if (cachedPoster) return cachedPoster as ArrayBuffer;
+
+  const posterUrl = `https://image.tmdb.org/t/p/original/${id}`;
+  const response = await fetch(posterUrl);
+  const poster = await response.arrayBuffer();
+
+  cache.set(`posters/${id}`, new Uint8Array());
+  return poster;
+}