angularProject/app/directives/navmenu.js

app.directive('navMenu',['$interval',function($interval){
  return {
    restrict: 'E',
    scope: {
      toggleMenu: '&',
      isActive: '&'
    },
    templateUrl: 'app/views/nav-menu.html',
    controller: function($scope,$location){
      $scope.isActive = function(linkPath){
        if(linkPath == $location.path()){
          return true;
        } else{
          return false;
        }
      }

      $interval(function(){
        if(firebase.auth().currentUser){
          if(firebase.auth().currentUser.uid == 'uRkqD9GmNxUsdgF1XtmPicDJwAz1'){
            $scope.isModeratorSigned = true;
          } else{
            $scope.isModeratorSigned = false;
          }
        } else{
          $scope.isModeratorSigned = false;
        }
      },1000)
    }
  }
}])