#!/bin/sh
#
# koha-remove -- Remove a Koha instance.
# Copyright 2010  Catalyst IT, 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 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 General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


set -e

args=$(getopt -l keep-mysql -o k -n $0 -- "$@")
eval set -- $args
while [ ! -z "$1" ]
do
    case "$1" in
         -k|--keep-mysql) keepmysql=1; shift;;
         --) shift; break;;
          *) break;;
    esac
    shift
done

NAMES="$@"

SITECONFDIR="/etc/koha/sites"
# There has to be a better way of excluding '.' from find. But this works.
INSTANCES=`cd $SITECONFDIR && find . -type d -printf " %f" |sed s/\ .\ //`

if [ -z $NAMES ] ; then
    echo "Please specify a Koha instance name. Your choices are:"
    echo "$INSTANCES"
    exit 1
fi

for name in $NAMES
do
    # Does the directory (ie instance) name exist?
    if [ ! -d $SITECONFDIR/$name ] ; then
     echo Koha configuration directory for instance \"$name\" does not exist, please specify a valid Koha instance
  exit 1
    fi

    echo "Removing Koha instance $name"
    mysql_hostname="localhost"
    if [ "$keepmysql" != "1" ]
    then
    # The grant creates the user in case it isn't, we don't want our loop to fail if it has already being deleted.
    mysql --defaults-extra-file=/etc/mysql/koha-common.cnf <<eof
GRANT USAGE ON \`koha_$name\`.* TO \`koha_$name\`@\`%\`;
GRANT USAGE ON \`koha_$name\`.* TO \`koha_$name\`@\`$mysql_hostname\`;
DROP USER \`koha_$name\`@\`%\`;
DROP USER \`koha_$name\`@\`$mysql_hostname\`;
DROP DATABASE IF EXISTS \`koha_$name\`;
FLUSH PRIVILEGES;
eof
    fi #`
    
    # If the daemon is not running already, we don't want to fail this loop. So bin the result code if this fails.
    koha-stop-zebra $name || /bin/true
    [ -f "/etc/apache2/sites-available/$name" ]  && \
        rm "/etc/apache2/sites-available/$name"
    [ -f "/etc/koha/sites/$name/koha-conf.xml" ] && \
        rm "/etc/koha/sites/$name/koha-conf.xml"
    [ -f "/etc/koha/sites/$name/zebra-biblios.cfg" ] && \
        rm "/etc/koha/sites/$name/zebra-biblios.cfg"
    [ -f "/etc/koha/sites/$name/zebra-biblios-dom.cfg" ] && \
        rm "/etc/koha/sites/$name/zebra-biblios-dom.cfg"
    [ -f "/etc/koha/sites/$name/zebra-authorities.cfg" ] && \
        rm "/etc/koha/sites/$name/zebra-authorities.cfg"
    [ -f "/etc/koha/sites/$name/zebra-authorities-dom.cfg" ] && \
        rm "/etc/koha/sites/$name/zebra-authorities-dom.cfg"
    [ -f "/etc/koha/sites/$name/zebra.passwd" ] && \
        rm "/etc/koha/sites/$name/zebra.passwd"
    # Maybe a user has left something in the config directory they want to keep? We won't delete it here, nor throw an error if the have.
    [ -d "/etc/koha/sites/$name" ] && \
        rmdir --ignore-fail-on-non-empty "/etc/koha/sites/$name"
    [ -d "/var/lock/koha/$name" ] && \
        rm -r "/var/lock/koha/$name"
    [ -d "/var/log/koha/$name" ] && \
        rm -r "/var/log/koha/$name"
    [ -d "/var/run/koha/$name" ] && \
        rm -r "/var/run/koha/$name"
    getent passwd "$name-koha" > /dev/null && deluser --quiet "$name-koha"
    # in case the site has already been disabled, we don't want to break the loop now.
    a2dissite "$name" || /bin/true
done

service apache2 restart