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Batched Requests - AirTable - Automations - Front End - 12/3/21

/**
GET /read?keys=foo,bar

Response:
{
    "foo": 12,
    "bar": 42
}

Implement a function getKey(key) which fetches the specified key
and returns its value asynchronously to the caller.

The function signature is a starting point. Feel free to wrap it
in a class or add additional arguments if needed.

Desired behavior:
If getKey is called multiple times in a small window of time,
there should be a single network request to fetch all the required
values. For example, if the below 3 calls happen within a small window
of time, there should be a single network request:

getKey('foo', cb)
getKey('bar')
getKey('foo')
*/

const keys = new Set();
const keysToCallback = [];
let isFirstCall = true; 

function getKey(key, callback: (data: number) => void) {
    keys.add(key);
    keysToCallback.push({
        key, callback
    }); 
    //const keyPromise = new Promise();
    
    if (isFirstCall) {
        setTimeout(() => {
            $.ajax({
                path: '/read?keys=' + [...keys].join(',')
            }).then((values) => {
                //keyPromise.resolve(keysAndValues);    
                // Object.keys
                keysToCallback.foreach((value) => {
                    [key, callback] = value
                    callback(values[key])
                })
            }, () => {
                // Log 
                 
            });
            isFirstCall = true; 
        }, 1000);
        
        isFirstCall = false;
    }
    
    // keyPromise.then((values) => {
    //     return values[key];
    // });
}
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