Express middleware caching

isCached

import { Response, Request, NextFunction } from 'express';

import * as redis from 'redis';

const portRedis = process.env.PORT_REDIS || '6379';

const redisClient = redis.createClient(portRedis);

const isCached = (req: Request, res: Response, next: NextFunction) => {
  const { idUser } = req.params;

  // getting our data by key (id)
  redisClient.get(idUser, (err, data) => {
    if (err) {
      res.status(500).send(err);
    }
    if (data != null) {
      console.log('we Found it in Redis 🟢');
      res.send(data);
    } else {
      console.log('User Not Found 🔴 ');
      // go To ⏭️ function or middleware
      next();
    }
  });
};
export default isCached;