Promises

// calling multiple promises

exports.addNewProfile = function(token, auth, body, callback) {
  var beacon
  checkNewToken(token).then(function() {
    return checkAuthPresent(auth)
  }).then(function() {
    console.log('UN: '+auth.basic.username)
    return checkUniqueEmail(auth.basic.username)
  }).then( function() {
    return checkDataPresent(body)
  }).then(function() {
    return getNewId()
  }).then(function(data) {
    beacon = data.message
    return addPhoneNode(token, beacon.major, beacon.minor)
  }).then(function(data) {
    return encryptPassword(auth.basic.username, auth.basic.password)
  }).then(function(data) {
    return buildPhoneDocument(token, beacon, data.message, body)
  }).then(function(data) {
    return insertNewDocument(data);
  }).then(function(data) {
    callback(data)
  }).catch(function(err) {
    callback(err);
  })
}

// a sample function returning a promise.
function getProfileData(auth) {
  console.log('3. GET PROFILE DATA')
  return new Promise(function(resolve, reject) {
    var email = auth.basic.username
    console.log('EMAIL: '+email)
    // search based on the username
    // db.nodes.find({'auth.email':'[email protected]'})
    // return the document
    mongo.Node.find({'auth.email': email}, {'_id': 0, '__v': 0}, function(error, document) {
      try {
        if (error) {
          return reject({code: 404, status:'error', message:error})
        }
        var profile = data.document[0]
        return resolve({code: 201, status:'success', document: profile})
      } catch(err) {
        return reject({code: 404, status:'error', message:'email address has not been registered'})
      }
    });
  })
}