#!/bin/sh
#
# koha-rebuild-zebra - Rebuild the Zebra database for Koha instances.
# 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

# Read configuration variable file if it is present
[ -r /etc/default/koha-common ] && . /etc/default/koha-common

# include helper functions
if [ -f "/usr/share/koha/bin/koha-functions.sh" ]; then
    . "/usr/share/koha/bin/koha-functions.sh"
else
    echo "Error: /usr/share/koha/bin/koha-functions.sh not present." 1>&2
    exit 1
fi

toggle_biblios_only()
{
    biblios_only="yes"
    biblios="yes"
    if [ "$authorities_only" != "yes" ]; then
        authorities="no"
    fi
}

toggle_authorities_only()
{
    authorities_only="yes"
    authorities="yes"
    if [ "$biblios_only" != "yes" ]; then
        biblios="no"
    fi
}

run_rebuild_zebra()
{
    local instancename=$1; shift

    if [ "$USE_INDEXER_DAEMON" = "no"  ] ||
       [     "${full_reindex}" = "yes" ] ||
       [            "${force}" = "yes" ] ; then

        if [ "$DEV_INSTALL" = "" ]; then
            KOHA_BINDIR=$KOHA_HOME/bin
        else
            KOHA_BINDIR=$KOHA_HOME/misc
        fi

        # TODO: This comment is here to remind us that we should make
        # rebuild_zebra.pl return error codes on failure
        if sudo -u "$instancename-koha" -H \
            env PERL5LIB=$PERL5LIB \
            KOHA_CONF="/etc/koha/sites/$instancename/koha-conf.xml" \
            $KOHA_BINDIR/migration_tools/rebuild_zebra.pl $@ ; then
            return 0
        else
            return 1
        fi
    fi
}

usage()
{
    local scriptname=$0
    cat <<EOF
Rebuild the Zebra indexes for Koha instances. The default behaviour
is to do an incremental rebuild.

Usage: $scriptname [options] instancename1 instancename2...
Options:
    --authorities|-a  Only run process for authorities.
    --biblios|-b      Only run process for biblios.
    --full|-f         Does a reindex of the whole collection.
    --force           Run incremental indexing even if USE_INDEXER_DAEMON="yes"
    --quiet|-q        Sometimes be a bit quieter for scripts/cronjobs.
    --verbose|-v      Be verbose. Can be multiple.
    --help|-h         Print this help.


Note: Any other options are passed directly to rebuild_zebra.pl.
EOF
}

# Default parameters
opt_idx="-z"
opt_verbose=""
opts_other=""
biblios_only="no"
authorities_only="no"
biblios="yes"
authorities="yes"
force="no"
full_reindex="no"

# The '-q' option is intended to prevent the cronjob causing this to output
# help information if there are no instances defined.
quiet="no"

# Read parameters
while [ -n "$*" ]; do
    case "$1" in
        -h|--help)
            usage ; exit 0
            ;;
        -b|--biblios)
            toggle_biblios_only
            ;;
        -a|--authorities)
            toggle_authorities_only
            ;;
        -f|--full)
            full_reindex="yes"
            opt_idx="-r"
            ;;
        --force)
            force="yes"
            ;;
        -v|--verbose)
            opt_verbose="$opt_verbose -v"
            ;;
        -q|--quiet)
            quiet="yes"
            ;;
        -*)
            opts_other="$opts_other $1";
            ;;
        *)
            break
            ;;
    esac

    shift
done

# Optionally use alternative paths for a dev install
adjust_paths_dev_install $1

# Parse command line.
if [ $# -lt 1 ]; then
    if [ "$quiet" = "no" ]; then
        usage
        die "Missing instance name."
    else
        exit
    fi
fi

# Loop over instance names
for name in "$@"
do
    if is_instance $name; then
        if [ "$biblios" = "yes" ]; then
            if ! run_rebuild_zebra $name \
                -b $opt_verbose $opt_idx $opts_other; then
                warn "Something went wrong rebuilding biblio indexes for $name"
            fi
        fi
        if [ "$authorities" = "yes" ]; then
            if ! run_rebuild_zebra $name \
                -a $opt_verbose $opt_idx $opts_other ; then
                warn "Something went wrong rebuilding authority indexes for $name"
            fi
        fi
    else
        warn "Unknown instance $name."
    fi
done

exit 0