#!/usr/bin/env bash

#
#   $Id: zefwd,v 1.1 2025/06/15 23:36:24 snw Exp $
#    ChivaNet BIND zone edit script
#
#  
#   Author: Serena Willis <snw@coherent-logic.com>
#    Copyright (C) 2013, 2025 Coherent Logic Development LLC
#
#
#   This file is part of ze.
#
#   ze is free software: you can redistribute it and/or modify
#   it under the terms of the GNU Affero General Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   ze 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 Affero Public License for more details.
#
#   You should have received a copy of the GNU Affero General Public License
#   along with ze. If not, see <https://www.gnu.org/licenses/>.
#
#   $Log: zefwd,v $
#   Revision 1.1  2025/06/15 23:36:24  snw
#   Initial revision
#
#
# SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
# SPDX-License-Identifier: AGPL-3.0-or-later
#

source /etc/defaults/ze.conf

[[ -z "${EDITOR}" ]] && EDITOR="emacs -nw"

SHNAME=`basename $0`

if [ ${EUID} -ne 0 ]
then
    echo "${SHNAME} must be run as root."
    exit
fi

if [ $1 = "" ]
then
    echo "usage: $0 zone"
    exit
fi


if [ ${SHNAME} = "zefwd" ]
then
    ZONEFILE="/etc/namedb/$1.db"
    ZONEBASE="$1.db"
    RNDC_DOMAIN=$1
elif [ ${SHNAME} = "zerev" ]
then
    ZONEFILE="/etc/namedb/rev.${1}.in-addr.arpa"
    ZONEBASE="rev.${1}.in-addr.arpa"
    RNDC_DOMAIN="${1}.IN-ADDR.ARPA"
fi

TMPFILE="/tmp/${ZONEBASE}"

if [ ! -f ${ZONEFILE} ]
then
    echo "${ZONEFILE} does not exist."
    exit
fi

if [ -f ${TMPFILE} ]
then
    echo "${ZONEFILE} already being edited."
    exit
fi

ORIG_SERIAL=`cat ${ZONEFILE} | sed '3q;d' | tr -d '[[:space:]]'`
cp ${ZONEFILE} ${TMPFILE}
cd /etc/namedb
${EDITOR} ${TMPFILE}

NEW_SERIAL=`cat ${TMPFILE} | sed '3q;d' | tr -d '[[:space:]]'`

if [ ${NEW_SERIAL} -le ${ORIG_SERIAL} ]
then
    echo "Serial number in zonefile ${ZONEFILE} must be greater than ${ORIG_SERIAL}."
    rm -f ${TMPFILE}
    exit
else
    echo "Serial number changed:  ${ORIG_SERIAL} -> ${NEW_SERIAL}"
fi

mv ${TMPFILE} ${ZONEFILE}
rm -f ${TMPFILE}

git add ${ZONEFILE}
read -p "Enter a comment explaining this edit: " COMMIT_CMNT
LOGIN_NAME=`logname`
echo "Committing to version control..."
git commit -m "${LOGIN_NAME}: ${COMMIT_CMNT}"
git push origin master
echo "Reloading BIND configuration..."
/etc/rc.d/named reload
echo "Requesting retransfer from ${SLAVE_SERVER}..."
ssh ${SLAVE_USER}@${SLAVE_SERVER} "sudo /usr/sbin/rndc retransfer ${RNDC_DOMAIN}"