crux_promise.js

getUserData().then(function (userData) {
  return getUserMessages(userData.id).then(function(userMessages){
    return { userData: userData, userMessages: userMessages }
  });
}).then(function (result) {
    return getUserLocation(result.userData.id).then(function(userLocation){
      result.userLocation = userLocation;
      return result;
    });
}).then(function(result){
      renderData(result.userData, result.userMessages, result.userLocation)
});

function getUserData () {
  return new Promise(function(resolve, reject){
    var data = {name: "Danny", Age: 26, id: 1211}
    //setTimeout roughly simulates an HTTP request.
    setTimeout(function () {
      resolve(data)
    }, 0);
  })
}

function getUserMessages (userId) {
  return new Promise(function(resolve, reject){
    var data = [{text: 'hello'}, {text: 'Do you like music?'}, {text: 'Numbers are cool.'}]
    //setTimeout roughly simulates an HTTP request.
    setTimeout(function () {
      resolve(data)
    }, 0)
  });
}

function getUserLocation (userId) {
  return new Promise(function(resolve, reject){
    var data = {state: 'CO', city: 'Denver'}
    //setTimeout roughly simulates an HTTP request.
    setTimeout(function () {
      resolve(data)
    }, 0)
  });
}

function renderData (user, messages, location) {
  console.log(user, messages, location)
}