Show a browser notification when a user is waiting to join a room

The owner of a room receives a browser notification if he has the page open
and another person tries to join his room.

app/helpers/users_helper.rb

@@ -15,4 +15,8 @@
 # with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 
 module UsersHelper
+  def is_room_owner
+    token = current_user ? current_user.encrypted_id : nil
+    token.present? && params[:id].present? && token == params[:id]
+  end
 end