#!/usr/bin/python
# Authors:
#     Endi S. Dewata <edewata@redhat.com>
#
# 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; version 2 of the License.
#
# 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.
#
# Copyright (C) 2013 Red Hat, Inc.
# All rights reserved.
#

from __future__ import absolute_import
import os

import pki
import pki.upgrade


class RemoveJniJarDir(pki.upgrade.PKIUpgradeScriptlet):

    def __init__(self):
        super(RemoveJniJarDir, self).__init__()
        self.message = 'Remove JNI_JAR_DIR from /etc/pki/pki.conf'

    def upgrade_system(self):

        filename = os.path.join(pki.CONF_DIR, 'pki.conf')
        self.backup(filename)

        # read pki.conf
        conf = pki.PropertyFile(filename)
        conf.read()

        self.update_system_config(conf)

        # update pki.conf
        conf.write()

    def update_system_config(self, conf):

        # find JNI_JAR_DIR
        index = conf.index('JNI_JAR_DIR')

        if index < 0:
            return

        # remove JNI_JAR_DIR
        conf.remove_line(index)

        if index == 0:
            return

        index = index - 1
        if conf.lines[index] != '# JNI jar file location':
            return

        # remove comment
        conf.remove_line(index)

        if index == 0:
            return

        index = index - 1
        if conf.lines[index] != '':
            return

        # remove blank line
        conf.remove_line(index)
