Return promise result from method

Question

I'm trying to create a new Id for a notification using the getAllIds() method supplied by the $cordovaLocalNotification plugin.

I have a notify Class which has a method for creating a new Id and a subsequent method for creating a notification as below:

var notify = {
  latestId: function() {
      $cordovaLocalNotification.getAllIds().then(function(result){
      return result.length;
    })
  },
  setNotification: function(show) {
    $ionicPlatform.ready(function() {
      $cordovaLocalNotification.schedule({
        id: notify.latestId,
        title: show.name + " is out today!",
      });
    });
  }
};

Where I try and assign the result using id: notify.latestId It seems to be en empty promise object or something. I've tried loads of different design patterns but I think I am missing something fundamental. Any help would be much appreciated!

Edit: Whole factory for good measure.

.factory('Notifications', function($cordovaLocalNotification,   $ionicPlatform) {

    var notify = {
  alertTime: function() {
    t = new Date();
    t.setSeconds(t.getSeconds() + 10);
    return t;
  },
  latestId: function() {
    var newId;
    $cordovaLocalNotification.getAllIds().then(function(result){
      console.log('Get all ids: ' + result) //Returned 2nd: 'Get all ids: 1,0,4,5,3,2'
      newId = result.length;
      console.log('New id: ' + newId);//Returned 3rd: 'New id: 6'
    });
    console.log('New id: ' + newId); //Returned first: 'New id: undefined'
    return newId;
  },
  clearAll: function() {
    $cordovaLocalNotification.clearAll();
  },
  setNotification: function(show) {
    $ionicPlatform.ready(function() {
      $cordovaLocalNotification.schedule({
        id: notify.latestId(), // undefined
        title: show.name + " is out today!",
        firstAt: notify.alertTime()
      });
    });
  }
};
return {
  setNotification: function(show){
    notify.setNotification(show);
  },
  clearAll: function(){
    notify.clearAll()
  },
  setAll: function() {
    console.log('Set all');
  }
};
})

Answer 1

Not sure if this is the correct approach but it fixed my problem. I removed the latestId() method and wrapped the promise around the setNotification() code so that it doesn't try and create a notification until the promise is resolved. See below:

var notify = {
  alertTime: function() {
    t = new Date();
    t.setSeconds(t.getSeconds() + 10);
    return t;
  },
  clearAll: function() {
    $cordovaLocalNotification.clearAll();
  },
  setNotification: function(show) {
    $ionicPlatform.ready(function() {
      $cordovaLocalNotification.getAllIds().then(function(result){
        var newId = result.length;
        $cordovaLocalNotification.schedule({
          id: newId,
          title: show.name + " is out today!",
          firstAt: notify.alertTime()
        });
      });
    });
  }
};