### Copyright 1999-2026. WebPros International GmbH. All rights reserved.
[ -z "$PLESK_INSTALLER_DEBUG" ] || set -x
[ -z "$PLESK_INSTALLER_STRICT_MODE" ] || set -e

detect_and_setup_ipv6_support()
{
	# setup ipv6 if it's available
	[ -f /proc/net/if_inet6 ] && grep -Eq "\w" /proc/net/if_inet6 || return 0
	cat > "/etc/sw-cp-server/conf.d/ipv6_ports.inc" << EOF
listen   [::]:8443 ipv6only=on ssl;
listen   [::]:8880 ipv6only=on;
EOF
}

sw_cp_server_graceful_upgrade()
{
	local pidfile="/var/run/sw-cp-server.pid"
	local pidfile_old="/var/run/sw-cp-server.pid.oldbin"
	local pid

	# make sw-cp-server to spawn new master process
	pid=$(grep -E -xm1 '[0-9]+' "$pidfile" 2>/dev/null) || return 1
	kill -s USR2 "$pid"

	local i=0
	# Wait for both old and new master to write their pid file
	while ! [ -s "$pidfile" -a -s "$pidfile_old" ]; do
		i=$((i+1))
		! [ $i -ge 10 ] || return 1
		sleep 1
	done

	# stop old master process
	pid=$(grep -E -xm1 '[0-9]+' "$pidfile_old" 2>/dev/null) || return 1
	kill -s QUIT "$pid"

	i=0
	while [ -s "$pidfile_old" ]; do
		i=$((i+1))
		! [ $i -ge 10 ] || return 1
		sleep 1
	done

	return 0
}

sw_cp_server_upgrade()
{
	# upgrade isn't required if sw-cp-server isn't active
	/bin/systemctl is-active sw-cp-server.service -q || return 0

	# do not restart sw-cp-server if config check is failed
	local msg rc=0
	msg=$(/usr/sbin/sw-cp-serverd -t) || rc=$?
	if [ $rc -ne 0 ]; then
		echo "$msg" >&2
		echo "sw-cp-server has not restarted during upgrade due to failure of configuration test" >&2
		return $rc
	fi

	if ! sw_cp_server_graceful_upgrade; then
		echo "Unable to restart sw-cp-server gracefully, performing full restart" >&2
		/bin/systemctl restart sw-cp-server.service || return $?
	fi

	return 0
}


case "$1" in
	configure)
		detect_and_setup_ipv6_support
		if [ -n "$2" ]; then
			sw_cp_server_upgrade || :
		fi
		;;
	abort-upgrade|abort-remove|abort-deconfigure)
		;;
	*)
		echo "postinst called with unknown argument \`$1'" >&2
		exit 1
		;;
esac

exit 0


# vim:ft=sh: