Implement a function fetchDataForUser, which fetches data from a remote JSON api and then returns a part of it.
Since this is a network call, it will need to be an asynchronous function and return the data via a callback.
The callback should be called with two arguments:
*/
const fetchDataForUser = function (url, username, callback) {
request(url, (err, res, body) => {
if (err) {
callback(err, null);
}
const data = JSON.parse(body);
for (let key in data) {
console.log(data[key]);
if (data[key] === username){
return key
}
callback(null, data);
});
};
It returns the correct list of data from the json file: users: { mr_robot: { wins: 5, losses: 2 }, teddy_b: { wins: 0, losses: 3 } }
But I need to retrieve specific elements when entering the username: "Mr Robot" for example
+ "losses": 2
+ "wins": 5
Test driver code
fetchDataForUser(url, 'mr_robot')
You can do this without a for loop.
In my below example the line that actually matters is the userdata:
let userdata = (data["users"][username]) ? data["users"][username]: [];
Basically it looks to see if the username exists in the data, if so it returns that user's data, if not it returns an empty array.
let data = {
"users": {
"mr_robot": {
"wins": 5,
"losses": 2
},
"teddy_b": {
"wins": 0,
"losses": 3
}
}
};
let username = "mr_robot";
let userdata = (data["users"][username]) ? data["users"][username]: [];
console.log(userdata)