from django.conf import settings
from django.contrib.auth.decorators import user_passes_test

def groups_required(*group_names):
    """Requires user membership in at least one of the groups passed in."""
    def in_groups(u):
        if u.is_authenticated():
            if bool(u.groups.filter(name__in=group_names)) or u.is_superuser:
                return True
            # Gi brukeren beskjed (muligens)
            #message = "Jeg kan ikke gi deg tilgang fordi \
            #    du er ikke i noen av disse gruppene: {0}.".format(
            #        ", ".join(settings.GROUPS_ALLOWED))
            #messages.create(message=message)
        return False
    return user_passes_test(in_groups)