feat(cache): implement caching of routes

src/utils/constants/keys.ts

@@ -0,0 +1,4 @@
+export const titleKey = (titleId: string) => `title:${titleId}`;
+export const nameKey = (nameId: string) => `name:${nameId}`;
+export const findKey = (query: string) => `find:${query}`;
+export const mediaKey = (url: string) => `media:${url}`;

src/utils/getOrSetApiCache.ts

@@ -0,0 +1,24 @@
+import redis from 'src/utils/redis';
+
+const ttl = process.env.REDIS_CACHE_TTL_API ?? 30 * 60;
+const redisEnabled =
+  process.env.USE_REDIS === 'true' || process.env.USE_REDIS_FOR_API_ONLY === 'true';
+
+const getOrSetApiCache = async <T extends (...fetcherArgs: any[]) => Promise<any>>(
+  key: string,
+  fetcher: T,
+  ...fetcherArgs: Parameters<T>
+): Promise<ReturnType<T>> => {
+  if (!redisEnabled) return await fetcher(...fetcherArgs);
+
+  const dataInCache = await redis.get(key);
+  if (dataInCache) return JSON.parse(dataInCache);
+
+  const dataToCache = await fetcher(...fetcherArgs);
+
+  await redis.setex(key, ttl, JSON.stringify(dataToCache));
+
+  return dataToCache;
+};
+
+export default getOrSetApiCache;

src/utils/redis.ts

@@ -2,7 +2,8 @@
 import Redis from 'ioredis';
 
 const redisUrl = process.env.REDIS_URL;
-const toUseRedis = process.env.USE_REDIS === 'true';
+const toUseRedis =
+  process.env.USE_REDIS === 'true' || process.env.USE_REDIS_FOR_API_ONLY === 'true';
 
 const stub: Pick<Redis, 'get' | 'setex' | 'getBuffer'> = {
   get: async key => Promise.resolve(null),