#!/bin/sh
# Copyright 2010-2011  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/>.

# Daily cron job for koha.
# - dump all sites, except one called 'demo'

dirname=""
days="2"

show_help() {
    cat <<EOH
$0 - performs backups of the koha installations on the system

This allows automation of backing up the koha data and configuration to the
filesystem. It will keep the past so many backups, discarding older ones.

Options:
    --output /path     The directory that the resulting files will be placed into.
                       (default: /var/spool/koha)
    --days 2           The number of days to keep backups around for
                       (default: 2)
    --exclude-indexes  Exclude Zebra indexes from the backups (default: false)

    --exclude-logs     Exclude /var/log/koha/name from the backup (default: false)

Note: backups produced using this tool can be restored using \`koha-restore'.
EOH
}

exclude_indexes=""
exclude_logs=""

CMD_LINE=`getopt -o h --long days:,output:,help,exclude-indexes,exclude-logs -n 'koha-run-backups' -- "$@"`

if [ $? != 0 ] ; then show_help ; exit 1 ; fi

eval set -- "$CMD_LINE"
while true ; do
    case "$1" in
        -h|--help)
            show_help; exit;;
        --days)
            days=$2; shift 2 ;;
        --output)
            dirname=$2; shift 2 ;;
        --exclude-indexes)
            exclude_indexes='--exclude-indexes'; shift ;;
        --exclude-logs)
            exclude_logs='--exclude-logs'; shift ;;
        --) shift ; break ;;
        *) echo "Unknown error parsing the command line!" ; exit 1 ;;
    esac
done

if ! test $days -gt 0 ; then
    echo "Parameter --days must be an integer greater than 0"
    exit 1
fi

for name in $(koha-list --enabled | grep -Fxv demo)
do
    if koha-dump ${exclude_indexes} ${exclude_logs} "$name" > /dev/null; then
        # Only delete old backups if dump script return success.

        if [ -z "$dirname" ]; then
            backupdir="$( xmlstarlet sel -t -v 'yazgfs/config/backupdir' /etc/koha/sites/$name/koha-conf.xml )";
        else
            backupdir="$dirname/$name";
        fi

        find $backupdir -maxdepth 1 \( -mtime +$days -or -mtime $days \) -name $name-'[1-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9].???'.gz  \( -name \*.sql.gz -or -name \*.tar.gz \) -print0 | xargs -0 -r rm
    fi
done