#!/bin/sh -e

init_inn_files() {
    PATHDB=$(/usr/lib/news/bin/innconfval pathdb)
    if [ -z "$PATHDB" ]; then
	echo "Cannot determine the database path, aborting."
	exit 1
    fi
    cd $PATHDB

    local package='inn2'
    if [ -e /usr/share/doc/inn2-lfs/ ]; then
      package='inn2-lfs'
    fi
      
    for file in active newsgroups; do
	if [ ! -f $file ]; then
	    echo "Installing initial content for $PATHDB/$file"
	    install -m 644 -o news -g news \
		/usr/share/doc/$package/examples/$file .
	fi
    done

    if [ ! -f history.dir ]; then
      echo -n "Building history database in $PATHDB... "
      if ! /usr/lib/news/bin/makehistory; then
        echo "failed!"
        return
      fi
      if ! /usr/lib/news/bin/makedbz -i -o -s 300000; then
        echo "failed!"
        return
      fi
      chown news:news history*
      chmod 664 history*
      echo "done."
    fi

    if [ ! -f active.times ]; then
	touch active.times
	chown news:news active.times
	chmod 644 active.times
    fi

    # squelch initial noise in email if this isn't present
    if [ ! -f .news.daily ]; then
	touch .news.daily
	chown news:news .news.daily
    fi

    # make sure typical log files exist, and can be rotated
    if [ ! -d /var/log/news ]; then
	install -d -m 775 -o news -g news /var/log/news
    fi
    cd /var/log/news
    [ -f news.notice ] || touch news.crit news.err news.notice
    chown news:news . OLD path news.crit news.err news.notice

    if [ -x /etc/init.d/inn2 ]; then
	update-rc.d inn2 defaults > /dev/null
    fi
}

check_usenet_alias() {
    # must have an alias for user usenet, point it to root by default
    if [ -f /etc/aliases ] && ! grep -q '^usenet:' /etc/aliases \
	    && ! getent passwd usenet; then
	echo "Adding alias for pseudo-user usenet to /etc/aliases."
	echo "usenet: root" >> /etc/aliases
	[ -x /usr/bin/newaliases ] && /usr/bin/newaliases
    fi
}

upgrade_inn_conf() {
    cd /etc/news
    if [ "$2" ] && dpkg --compare-versions "$2" lt "2.3.999+20030125-1"; then
	/usr/lib/news/bin/innupgrade -f inn.conf
    fi
}

rebuild_history_index() {
    [ -f /var/lib/news/must-rebuild-history-index ] || return 0

    cd /var/lib/news
    HLINES=$(tail -1 history.dir | awk '{ print $1 }')
    [ "$HLINES" ] || HLINES=1000000
    echo "Rebuilding the history index for $HLINES lines, please wait..."
    rm history.hash history.index history.dir
    su news -c "/usr/lib/news/bin/makedbz -s $HLINES -f history"

    rm /var/lib/news/must-rebuild-history-index
}

rebuild_overview() {
    [ -f /var/lib/news/must-rebuild-overview ] || return 0

    OVENABLED=$(/usr/lib/news/bin/innconfval enableoverview)
    if [ -z "$OVENABLED" ]; then
	echo "Cannot determine the overview method used, stopping."
	exit 1
    fi
    if [ $OVENABLED = no -o $OVENABLED = false ]; then
	return 0
    fi

    OVMETHOD=$(/usr/lib/news/bin/innconfval ovmethod)
    if [ -z "$OVMETHOD" ]; then
	echo "Cannot determine the overview method used, stopping."
	exit 1
    elif [ $OVMETHOD = tradindexed -o $OVMETHOD = ovdb ]; then
	OVPATH=$(/usr/lib/news/bin/innconfval pathoverview)
	if [ -z "$OVPATH" ]; then
	    echo "Cannot determine the overview path, aborting."
	    exit 1
	fi
	echo "Deleting the old overview database, please wait..."
	find $OVPATH -type f -not -name DB_CONFIG -print0 | xargs -0 -r rm -f
    elif [ $OVMETHOD = buffindexed ]; then
	echo "Deleting the old overview database, please wait..."
	awk -F : '/^[0-9]/ { print $2 }' < /etc/news/buffindexed.conf | \
	    while read name size; do
		dd if=/dev/zero of="$name" bs=1024 count="$size"
	    done
    else
	echo "Unknown overview method '$OVMETHOD', aborting."
	exit 1
    fi

    echo "Rebuilding the overview database, please wait..."
    su news -c "/usr/lib/news/bin/makehistory -F -O -x"

    rm /var/lib/news/must-rebuild-overview
}

start_innd() {
# make sure we can determine the FQDN, since innd won't launch if we can't
if hostname --fqdn > /dev/null 2>&1; then
    invoke-rc.d inn2 start || echo "Could not start INN!"
else
cat <<END


Not starting innd.  The daemon needs to be able to determine the name of
this machine, and your /etc/hosts and/or DNS config is apparently not
allowing this to happen.  After you have fixed things so that 'hostname
--fqdn' returns a reasonable value, you can start the daemon by running
'/etc/init.d/inn2 start'.


END
fi
}

case "$1" in
    configure)
    init_inn_files
    check_usenet_alias
    upgrade_inn_conf "$@"
    rebuild_history_index
    rebuild_overview
    if [ -z "$2" -o ! -e /var/run/news/innd.pid ]; then # first install
	start_innd
    else
	ctlinnd -t 20 throttle "upgrade" > /dev/null || true
	ctlinnd -t 20 xexec inndstart > /dev/null \
	    || echo "Could not restart INN!"
    fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
    echo "postinst called with unknown argument '$1'" >&2
    ;;
esac

#DEBHELPER#

exit 0