service for confirm alert etc

confirm.js

module.service("$nalerts", ["$q","$modal",'$rootScope', function($q, $modal,$rootScope){
  var scope = $rootScope.$new();
  var deferred;
  var defaults = {title: "Alert", message: "", type: "info"};
  var modal= $modal({scope: scope, template: 'cust_dialogs/nalerts.html', show: false});

  scope.answer = function(res) {
    deferred.resolve(res);
    modal.hide();
  }

  var parentShow = modal.show;

  var setOptions = function(opts){
    scope.options = angular.extend({}, defaults, opts);
  }
  var open = function(){
    deferred = $q.defer();
    parentShow();
    return deferred.promise;
  }

  var info = function(opts){
    setOptions(opts);
    scope.options.type = "info";
    return  open();
  }

  var warn = function(opts){
    setOptions(opts);
    scope.options.type = "warn";
    return  open();
  }

  var confirm = function(opts){
    setOptions(opts);
    scope.options.type = "confirm";
    return  open();
  }

  return {
      info: info,
      warn: warn,
      confirm: confirm
  };
}])

$nalerts.warn({message: "any message"}).then(function(res){ alert(res) })