An angular-dialog-service by Michael Conroy, Has Dialog functions for most uses including wait dialog. Uses Promise to finish actions.

Michael Conroy created a angular service for Dialog messages used for angular+bootstrap = angular UI.

Looks complete enough and has a Wait Dialog which is very nice to implement.

here is an article about it : http://michaeleconroy.blogspot.co.il/2013/10/redux-creating-application-dialog.html

and GitHub project is here : https://github.com/m-e-conroy/angular-dialog-service