memorium/routes/api/tmdb/[id].ts

import { FreshContext, Handlers } from "$fresh/server.ts";
import { getMovie } from "@lib/tmdb.ts";
import { json } from "@lib/helpers.ts";
import { createCache } from "@lib/cache.ts";

type CachedMovieCredits = {
  lastUpdated: number;
  data: unknown;
};

const CACHE_INTERVAL = 1000 * 60 * 24 * 30;
const cache = createCache<CachedMovieCredits>({ expires: CACHE_INTERVAL });

const GET = async (
  _req: Request,
  _ctx: FreshContext,
) => {
  const id = _ctx.params.id;

  if (!id) {
    return new Response("Bad Request", {
      status: 400,
    });
  }

  const cacheId = `/movie/${id}`;

  const cachedResponse = cache.get(cacheId);
  if (
    cachedResponse && Date.now() < (cachedResponse.lastUpdated + CACHE_INTERVAL)
  ) {
    return json(cachedResponse.data);
  }

  const res = await getMovie(+id);

  cache.set(
    cacheId,
    JSON.stringify({
      lastUpdated: Date.now(),
      data: res,
    }),
  );

  return json(res);
};

export const handler: Handlers = {
  GET,
};