#!/bin/bash

#
# This file is part of Plinth.
#
# This program 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.
#
# 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

# Action to set up new hostname for ejabberd and jwchat.

hostname="$1"
old_hostname=`debconf-show ejabberd | awk '/hostname/ { print $3 }'`

# Based on http://www.process-one.net/docs/ejabberd/guide_en.html#htoc77

# Setup some variables
OLDNODE=ejabberd@"$old_hostname"
NEWNODE=ejabberd@"$hostname"
OLDFILE=/tmp/old.backup
NEWFILE=/tmp/new.backup

echo "ejabberd ejabberd/hostname string $hostname" | debconf-set-selections
echo "jwchat jwchat/ApacheServerName string $hostname" | debconf-set-selections
DEBIAN_FRONTEND=noninteractive dpkg-reconfigure jwchat

# Debconf can't handle our manual changes to ejabberd's config yet.
sed -i "s/$old_hostname/$hostname/g" /etc/ejabberd/ejabberd.cfg

# Make sure there aren't files in the Mnesia spool dir
mkdir -p /var/lib/ejabberd/oldfiles
mv /var/lib/ejabberd/*.* /var/lib/ejabberd/oldfiles/

# Start ejabberd
service ejabberd restart

# It can take a while to start up...
for i in {1..12}
do
    if ejabberdctl status ; then
        break
    else
        sleep 10
    fi
done

# Convert the backup to new node name
ejabberdctl mnesia_change_nodename $OLDNODE $NEWNODE $OLDFILE $NEWFILE

# Install the backup file as a fallback
ejabberdctl install_fallback $NEWFILE

# Stop ejabberd
ejabberdctl stop

# Start ejabberd
service ejabberd restart