I have created a backend application (section) to handle communications and I need to be able to notify the user if a delete failed for some reason. While the notificationService is available in the edit controller, I can't seem to get it to work in the delete controller. Unfortunately the samples I could find were limited.

Here is my code:

Angular edit controller

angular.module("umbraco").controller("CellularCarrier.EditController",
function ($scope, $routeParams, cellularcarrierResource, notificationsService, navigationService) {

    $scope.loaded = false;

    if ($routeParams.id == -1) {
        $scope.cellularcarrier = {};
        $scope.loaded = true;
    } else {
        //get a cellularcarrier id -> service
        cellularcarrierResource.getById($routeParams.id).then(function (response) {
            $scope.cellularcarrier = response.data;
            $scope.loaded = true;
        });
    }

    $scope.save = function (cellularcarrier) {
        cellularcarrierResource.save(cellularcarrier).then(function (response) {
            $scope.cellularcarrier = response.data;
            $scope.cellularcarrierForm.$dirty = false;
            navigationService.syncTree({ tree: 'cellularcarrier', path: [-1, -1], forceReload: true });
            notificationsService.success("Success", cellularcarrier.Name + " has been saved");
        });
    };
});

Angular delete controller (where I would like to use notificationService)

angular.module("umbraco").controller("CellularCarrier.DeleteController",
function ($scope, cellularcarrierResource, navigationService, treeService) {
  $scope.delete = function (id) {
    cellularcarrierResource.deleteByID(id).then(function (response) {
      var i = parseInt(response.data);
      if (i > 0)
        treeService.removeNode($scope.currentNode);
      //else if (i == 0)
      //  notificationsService.error("Failed", "Cellular carrier can not be found.");
      //else if (i == -1)
      //  notificationsService.error("Failed", "Cellular carrier is referened and can't be deleted.");

      navigationService.hideNavigation();
    });

  };
  $scope.cancelDelete = function () {
    navigationService.hideNavigation();
  };
});

Cellular Carrier API Controller

[PluginController("MailApp")]
public class CellularCarrierAPIController : UmbracoAuthorizedJsonController {
  public dbStRose db = new dbStRose();  // Entity Framework

  public IEnumerable<CellularCarrier> GetAll() {
    return db.CellularCarriers.OrderBy(x => x.Name);
  }

  public CellularCarrier GetByID(int id) {
    return new CellularCarrier(db.CellularCarriers.Find(id));
  }

  public CellularCarrier PostSave(CellularCarrier carrier) {

    if (carrier.ID > 0) {
      CellularCarrier c = db.CellularCarriers.Find(carrier.ID);
      db.Entry(c).CurrentValues.SetValues(carrier);
    } else {
      db.CellularCarriers.Add(carrier);
    }

    db.SaveChanges();

    return carrier;
  }

  public int DeleteByID(int id) {
    CellularCarrier m = db.CellularCarriers.Find(id);
    if (m == null)
      return 0;

    if (m.Users.Count == 0) {
      db.CellularCarriers.Remove(m);
      db.SaveChanges();
      return id;
    }

    return -1;
  }

  protected override void Dispose(bool disposing) {
    if (disposing) {
      db.Dispose();
    }
    base.Dispose(disposing);
  }
}

Angular Resource File

angular.module("umbraco.resources")
.factory("cellularcarrierResource", function ($http) {
    return {
        getById: function (id) {
            return $http.get("backoffice/MailApp/CellularCarrierAPI/GetByID?id=" + id);
        },
        save: function (cellularcarrier) {
            return $http.post("backoffice/MailApp/CellularCarrierAPI/PostSave", angular.toJson(cellularcarrier));
        },
        deleteByID: function (id) {
            return $http.delete("backoffice/MailApp/CellularCarrierAPI/DeleteByID?id=" + id);
        }
    };
});

Any help you can give me would me much appreciated.

Thanks