Stop if statement in async function from returning undefined instantly?

Question

I've got the following async code.

const dlcOrNot = async (file) => {
  console.log('Unpacking dlc file...')
  if (file.indexOf('.dlc') > -1) {
    await decrypt.upload(file, (err, response) => {
      const links = response.success.links;
      writeFile('urls.txt', String(links).replace(/,/g, '\n'), 'utf-8', () => {
        return 'urls.txt';
      });
    });
  } else {
    return file;
  };
};

My problem is the if statement returns undefined instantly before decrypt.upload() ran, how can I make it wait for the function inside to return its value?

if `decrypt.upload` takes a callback, it will unlikely return a promise. You can only `await` expressions that return a promise though, you will need to promisify your call. You should then also promisify `writeFile` (separately) and use a second `await`. — Bergi, Jan 18 '19 at 09:41

Quentin · Accepted Answer · 2019-01-18T09:42:21.150

0

You can only await a promise.

decrypt.upload does not return a promise.

Replace it with a promise.

This question covers converting a function which takes a callback to one which returns a promise.

edited Jan 18 '19 at 09:42

answered Jan 18 '19 at 09:40

Quentin

914,110
126
1,211
1,335

That seems to be a common inquiry herein. – Joseph Persico Jan 18 '19 at 09:41

Stop if statement in async function from returning undefined instantly?

1 Answers1