Atlassian Frontend Software Interview - Cached API call

cached-api-call.js

const cachedApiCall = (time) => {
  const cache = {};
  
  return async (url, config = {}) => {
    const key = `${url}${JSON.stringify(config)}`;
    
    const entry = cache[key];
    
    if(!entry || Date.now() > entry.expiry){
      try{
	      console.log("Making a fresh api call");
        let resp = await fetch(url, config);
        resp = await resp.json();
        cache[key] = {value: resp, expiry: Date.now() + time};
        return cache[key].value;
      }catch(e){
        console.log("error while making api call", JSON.stringify(e));
      }
    } else {
    	console.log("Returning from cache");
	    return cache[key].value;
    }
  }  
}



const call = cachedApiCall(5000);
call('https://jsonplaceholder.typicode.com/todos/1', {}).then((a) => console.log("1", a));
setTimeout(() => {
  call('https://jsonplaceholder.typicode.com/todos/1', {}).then((a) => console.log("2", a));
}, 2000);
setTimeout(() => {
  call('https://jsonplaceholder.typicode.com/todos/1', {}).then((a) => console.log("3", a));
}, 4000);
setTimeout(() => {
  call('https://jsonplaceholder.typicode.com/todos/1', {}).then((a) => console.log("4", a));
}, 6000);