The boring parts of every app, already written

import { createCache } from "@zap-studio/cache";
import { createFetch } from "@zap-studio/fetch";
import { ConsoleLogger } from "@zap-studio/logger";
import { exponentialBackoff, runRetryPolicy } from "@zap-studio/retry";
import { z } from "zod";

const UserSchema = z.object({ id: z.number(), email: z.email() });
type User = z.infer<typeof UserSchema>;

const logger = new ConsoleLogger({ minLevel: "info" });
const users = createCache<string, User>(100, { ttl: 60_000 });
const { api } = createFetch({ baseURL: "https://api.example.com", logger });

const policy = exponentialBackoff({
  maxAttempts: 3,
  baseDelayMs: 100,
  maxDelayMs: 2_000,
});

export const getUser = async (id: string): Promise<User> => {
  const cached = users.get(id);
  if (cached) {
    return cached;
  }

  const user = await runRetryPolicy(policy, () =>
    api.get(`/users/${id}`, UserSchema), 
  );

  users.set(id, user);
  return user;
};