recursiveTask.js

var Promise = require('bluebird');

doTask1()
 .then(doTask2)
 .then(doARecursiveTask)
 .then(doFinalTask)
 .then(function (fullfilled) {
  console.log('that last thing is:', fullfilled)
  console.log('[DOOOOOOOOONEEEE]')
 })
 .catch(function(err) {
   console.log('just got error')
 })


function doTask1() {
  return new Promise(function (resolve, reject) {
    console.log('task 1 is done')
    resolve('some data from task 1')
  }) 
}

function doTask2(fullfilled) {
  return new Promise(function (resolve, reject) {
    console.log('task 2 recieved:', fullfilled)
    console.log('task 2 is done')
    resolve('some data from task 2')
  }) 
}



function doARecursiveTask(fullfilled) {
  var numberOfTimeRecursiveTaskShouldBeDone = 10
  var numberOfTimeRecursiveTaskSoFar = 0
  var condition = function() {
    return numberOfTimeRecursiveTaskSoFar < numberOfTimeRecursiveTaskShouldBeDone
  }

  var recursiveTask = function() {
    return new Promise(function(resolve, reject) {
      numberOfTimeRecursiveTaskSoFar++;
      console.log(numberOfTimeRecursiveTaskSoFar);
      resolve('final shit');
    })
  }

  var resolver = Promise.defer();
  var loop = function() {
    if (!condition()) {
      //this will run and pass data to final task
      return resolver.resolve('all rec was done');
    } else {
      return Promise.cast(recursiveTask())
        .then(loop)
        .catch(resolver.reject);
    }
  }
    
  process.nextTick(loop)
  return resolver.promise
}


function doFinalTask(fullfilled) {
  return new Promise(function (resolve, reject) {
    console.log('final task recieved:', fullfilled)
    console.log('final task is done')
    resolve('some data from final task')
  }) 
}