#! /bin/sh

#  bf_compact source_dir [wordlist_name...]
#
#    use to compact wordlist.db
#    replaces original directory with new one
#    renames original directory with '.old' extension

# $Id: bf_compact.in 6459 2006-03-27 00:20:12Z relson $

set -e # die on errors

if [ -z "$1" ] ; then
    echo 'usage: bf_compact source_dir [wordlist_name...]'
    exit 1
fi

# extract home directory
BOGOHOME="$1"
shift

if [ ! -d "$BOGOHOME" ] ; then
    echo $BOGOHOME must be a directory, not a file
    exit 1
fi

# strip trailing slashes
while true; do
    case "$BOGOHOME" in
	*/) BOGOHOME=${BOGOHOME%/} ;;
	*)  break ;;
    esac
done

# find wordlists
if [ -n "$1" ] ; then
    FILES="$@"
else
    DIR=`bogofilter -QQ | grep ^bogofilter_dir | awk '{print $3}'`
    if [ "$BOGOHOME" != "$DIR" ] ; then
	FILES=`ls "$BOGOHOME"/*.db`
    else
	FILES=`bogofilter -QQ | grep ^wordlist | cut -f3 -d,`
    fi
fi

BOGOTEMP="bf_compact.$$"

mkdir "$BOGOTEMP" || {
    echo "Cannot create directory $BOGOTEMP. Abort."
    exit 1
}

# copy Berkeley DB configuration if present
if test -f "$BOGOHOME"/DB_CONFIG ; then
    cp -p "$BOGOHOME"/DB_CONFIG "$BOGOTEMP"/
fi

# determine transactions
if test "`find "$BOGOHOME/" -name "log.??????????" -print`" = "" ; then
    TXN=no
else
    TXN=yes
fi

# reload files
for FILE in $FILES ; do
    NAME=`basename $FILE`
    bogoutil -d $FILE | bogoutil --db-transaction=no -l $BOGOTEMP/$NAME
done

if [ $TXN = "yes" ] ; then
    #create database environment files
    bogofilter -e -C -d $BOGOTEMP --db-transaction=yes < /dev/null
fi

# remove $BOGOHOME.old so we don't move the new backup *into* it
# rather than renaming the backup to it.
rm -rf "$BOGOHOME.old"
mv "$BOGOHOME" "$BOGOHOME.old"
mv  $BOGOTEMP  "$BOGOHOME"
