Code runs before request is completed on NodeJS - node.js

Question

I have the following code: (the code runs without issues)
function getValoresAcao(acoes) {
acoes.forEach(acao => {
getValorAcao(acao)
});
console.log("the end")
}
function getValorAcao(acao) {
url = 'https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&parse_mode=HTML&symbol='+acao+'&apikey='+API_KEY
request(url, { json: true }, (err, res, body) => {
if (err) { return console.log(err); }
let contador = 0;
let valorDeDoisDias = [];
const dailyJsonObject = body["Time Series (Daily)"]
var objectKeysArray = Object.keys(dailyJsonObject)
objectKeysArray.forEach(function(objKey) {
var objValue = dailyJsonObject[objKey]
if (contador < NUMERO_DE_ELEMENTOS )
{
//console.log(dailyJsonObject);
const valorFechamento = objValue["4. close"]
console.log(valorFechamento);
contador = contador + 1
valorDeDoisDias.push(valorFechamento);
}
});
const textoDiferenca = getDiferencaEmPorcentagem(valorDeDoisDias);
let bigString = "" + acao + " | " + valorDeDoisDias[0] + " | " + textoDiferenca
request(urlTelegram + bigString, { json: true }, (err, res, bodyTelegram) => {
console.log(bodyTelegram);
})
});
}
function getDiferencaEmPorcentagem(valprDeDoisDias) {
let myString = ""
const valorDiaAnterior = valprDeDoisDias[0]
const valorDiaMaisRecente = valprDeDoisDias[1]
myString = (valorDiaAnterior - valorDiaMaisRecente ) / valorDiaMaisRecente * 100
myString = myString.toFixed(2)
console.log(myString)
return myString + "%"
}
But the code console.log("the end") is supposed to run after the request is completed, but it runs when I start the code, it didn't wait the request to be finished.
How can I make the "the end" part of the code wait the request be executed?

Answer 1

probably something like that could help:
async function getValoresAcao(acoes) {
await Promise.all(acoes.map(getValorAcao))
console.log("the end")
}
async function getValorAcao(acao) {
const url = 'https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&parse_mode=HTML&symbol=' + acao + '&apikey=' + API_KEY
return new Promise ((resolve, reject)=>{
try{
request(url, { json: true }, (err, res, body) => {
if (err) {
throw err
}
let contador = 0;
let valorDeDoisDias = [];
const dailyJsonObject = body["Time Series (Daily)"]
var objectKeysArray = Object.keys(dailyJsonObject)
objectKeysArray.forEach(function (objKey) {
var objValue = dailyJsonObject[objKey]
if (contador < NUMERO_DE_ELEMENTOS) {
//console.log(dailyJsonObject);
const valorFechamento = objValue["4. close"]
console.log(valorFechamento);
contador = contador + 1
valorDeDoisDias.push(valorFechamento);
}
});
const textoDiferenca = getDiferencaEmPorcentagem(valorDeDoisDias);
let bigString = "" + acao + " | " + valorDeDoisDias[0] + " | " + textoDiferenca
request(urlTelegram + bigString, { json: true }, (err, res, bodyTelegram) => {
if(err){
throw err
}
resolve(bodyTelegram)
})
});
} catch (e) {
reject(e)
}
})
}
function getDiferencaEmPorcentagem(valprDeDoisDias) {
let myString = ""
const valorDiaAnterior = valprDeDoisDias[0]
const valorDiaMaisRecente = valprDeDoisDias[1]
myString = (valorDiaAnterior - valorDiaMaisRecente) / valorDiaMaisRecente * 100
myString = myString.toFixed(2)
console.log(myString)
return myString + "%"
}