# Copyright (C) 2005, 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Transport implementation that disables listing to simulate HTTP cheaply."""

from __future__ import absolute_import

from ..transport import Transport
from ..transport import decorator


class UnlistableTransportDecorator(decorator.TransportDecorator):
    """A transport that disables file listing for testing."""

    @classmethod
    def _get_url_prefix(self):
        """Unlistable transports are identified by 'unlistable+'"""
        return 'unlistable+'

    def iter_files_recursive(self):
        Transport.iter_files_recursive(self)

    def listable(self):
        return False

    def list_dir(self, relpath):
        Transport.list_dir(self, relpath)


def get_test_permutations():
    """Return the permutations to be used in testing."""
    from ..tests import test_server
    return [(UnlistableTransportDecorator, test_server.UnlistableServer),]
