How to return function call with Promise

Question

Maybe i have a stoopid question, but i want to return function call with promise .then and with async function, to later use this on express.js

function search (opts) {
 //const url
 //const callback
return request(url, callback)
.then(res => {
 const promisesAccounts = res.accounts.map( el => request(el, callbackPage));
 const promisesKeyword = res.keyword.map( el => request(el, callbackPage));
 const hello = async () => {
 const obj = {};
 const promiseA = await Promise.all(promisesAccounts);
 const promiseB = await Promise.all(promisesKeyword);
 obj.accounts = promiseA;
 obj.keywords = promiseB;
 console.log(obj);
}
hello()
})
}

Maybe somehow i can return obj to later use it on express app like this :

app.get('/', (req, res) => {
 search()
 .then (result => res.json(result)) //hello async obj result 
})

Answer 1

You can just return your function like this

function search (opts) {
 //const url
 //const callback
 return request(url, callback)
 .then(res => {
 const promisesAccounts = res.accounts.map( el => request(el, callbackPage));
 const promisesKeyword = res.keyword.map( el => request(el, callbackPage));
 const hello = async () => {
 const obj = {};
 const promiseA = await Promise.all(promisesAccounts);
 const promiseB = await Promise.all(promisesKeyword);
 obj.accounts = promiseA;
 obj.keywords = promiseB;
 console.log(obj);
 }
 return hello;
 })
}

To use this you can then

request
 .then(async myFunc => {
 const value = await muFunc(parameter_here)
 })

• Albert Jovinskyi: myFunc thats reference to hello func ?
• Prasanna: @AlbertJovinskyi Yes! It refers to the hello func. But if you want just the computed value of the function Sergii's answer is what you should look up to
• Albert Jovinskyi: yes thank you i'll gonna try with your variant, its more intresting)

Answer 2

Please try:

function search (opts) {
 return request(url, callback)
 .then(res => {
 const promisesAccounts = res.accounts.map( el => request(el, callbackPage));
 const promisesKeyword = res.keyword.map( el => request(el, callbackPage));
 const hello = async () => {
 const obj = {};
 const promiseA = await Promise.all(promisesAccounts);
 const promiseB = await Promise.all(promisesKeyword);
 obj.accounts = promiseA;
 obj.keywords = promiseB;
 console.log(obj);
 return obj;
 }
 return hello()
 })
}