Hide the unpublish button for members of the editor group

nunpublish.js

/*    package.manifest...
 *
 *    {
 *	    "javascript" : ["~/App_Plugins/nunpublish/script.js"]
 *    }
 */
 
(function () {

    function directive(authResource) {
        return {
            restrict: 'E',
            link: function () {
                authResource.getCurrentUser()
                    .then(function (user) {
                        if (user.userGroups.indexOf('editor') !== -1) {
                            document.styleSheets[0].insertRule('[data-element="button-unpublish"] { display: none!important; }');
                        }
                    });
            }
        }
    }

    angular.module('umbraco.directives').directive('section', ['authResource', directive]);
}());