ribeirojr / async-if-else

Conditional capabilities to NodeJS Async module

async-if-else

This module adds if else conditional capabilities to async module.

Ever came across code like this on your async.waterfall flow?

var async = require('async');

async.waterfall([
  async.constant({email: '[e-mail]', dogs: 2, money: 0, fun: 100 }),
  updateUserEmailOrGetLegacy
  sendEmail
], handler);

function updateUserEmailOrGetLegacy(user, cb) {
  emailExists(user.email, function (err, value) {
    if (err)
      callback(err)
    else {
      if (user.email)
        updateAccount(user, cb);
      else
        importFromLegacyByEmail(user, cb)
    }
  })
}

Using async-if-else you can have a conditional waterfall without the need of a wrapper function.
And the code is so much more readable, don't you agree?

var async = require('async-if-else')(require('async'));

async.waterfall([
  async.constant({email: '[e-mail]', dogs: 2, money: 0, fun: 100 }),
  async.if(emailExists, updateAccount).else(importFromLegacyByEmail),
  sendEmail
], handler);

You can also omit the else and the function is only executed if the predicate is true.

var async = require('async-if-else')(require('async'));

async.waterfall([
  async.constant({email: '[e-mail]', dogs: 2, money: 0, fun: 100 }),
  async.if(emailExists, auditLogging),
  publishToQueue
], handler);

if you don't wanna change the async object, you can always do something like that

var async = require('async');
var conditional = require('async-if-else')({});

async.waterfall([
  async.constant({email: '[e-mail]', dogs: 2, money: 0, fun: 100 }),
  conditional.if(emailExists, auditLogging),
  publishToQueue
], handler);

Hey, did you found an issue?

The best way to get in touch is using the GitHub.
If you can't find someone with the problem you are facing open a new issue and let me know.
If you manage to find a solution for your problem, you can submit a new PR :)

Let's make the world a better place by helping others.

License

MIT