#!/bin/sh

set -e

CONFFILE="/etc/miniupnpd/miniupnpd.conf"
DEFAULT_FILE="/etc/default/miniupnpd"

append_config () {
	file="${1}"
	key="${2}"
	while [ "$#" -ge 3 ]; do
		if [ -s "${file}" ]; then
			sed -ri '
x
s|^$||
t find
x
b
: find
x
s|^\s*'"${key}"'=['\'\"']?'"${3}"'['\'\"']?\s*$|&|
t end
s|^#[ \t#]*('"${key}"'=['\'\"']?'"${3}"'['\'\"']?)\s*$|\1|
t end
s|^#[ \t#]*('"${key}"'=)\s*$|\1'"${3}"'|
t end
$ a'"${key}"'='"${3}"'
b
: end
h
			' "${file}"
		else
			echo "${key}=${3}" > "${file}"
		fi
		shift
	done
}

remove_config_all () {
	sed -ri 's|^\s*'"${2}"'=.*$|#&|' "${1}"
}


case "$1" in
install|upgrade)
	if [ -n "$2" ] && [ -r "${DEFAULT_FILE}" ] ; then
		if dpkg --compare-versions "$2" lt 2.0.20180222-1 ; then
			. "${DEFAULT_FILE}"
			if [ -n "${MiniUPnPd_LISTENING_IP}" -o -n "${MiniUPnPd_EXTERNAL_INTERFACE}" ] ; then
				# Make sure /etc/miniupnpd is there. It's in debian/dirs
				# already, but we want to make sure an admin didn't delete it.
				if ! [ -e /etc/miniupnpd ] ; then
					mkdir -p /etc/miniupnpd
				elif ! [ -d /etc/miniupnpd ] ; then
					echo "Something is wrong: /etc/miniupnpd exists, but is not a directory!"
					exit 1
				fi
				# Make sure we have a /etc/miniupnpd/miniupnpd.conf
				if ! [ -e "${CONFFILE}" ] ; then
					cp -f /usr/share/miniupnpd/miniupnpd.conf "${CONFFILE}"
				fi

				echo 'Migrating old "/etc/default/miniupnpd"...'
				remove_config_all "${CONFFILE}" listening_ip
				remove_config_all "${CONFFILE}" ext_ifname
				append_config "${CONFFILE}" listening_ip ${MiniUPnPd_LISTENING_IP}
				append_config "${CONFFILE}" ext_ifname ${MiniUPnPd_EXTERNAL_INTERFACE}
				remove_config_all "${DEFAULT_FILE}" MiniUPnPd_LISTENING_IP
				remove_config_all "${DEFAULT_FILE}" MiniUPnPd_EXTERNAL_INTERFACE
			fi
		fi

		if dpkg --compare-versions "$2" lt 2.1-2 ; then
			sed -i '
				s/^MiniUPnPd_ip6tables_enable=no/MiniUPnPd_ip6tables_enable=0/
				s/^MiniUPnPd_ip6tables_enable=yes/MiniUPnPd_ip6tables_enable=1/' "${DEFAULT_FILE}"
		fi

		if dpkg --compare-versions "$2" lt 2.1-3 ; then
			sed -i 's/^START_DAEMON=/# START_DAEMON deprecated, use service miniupnpd enable\/disable\n#START_DAEMON=/' "${DEFAULT_FILE}"
		fi
	fi
;;

abort-upgrade)
;;

*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac

# Automatically added by dh_installinit/13.11.9
if [ "$1" = "install" ] && [ -n "$2" ] && [ -e "/etc/init.d/miniupnpd" ] ; then
	chmod +x "/etc/init.d/miniupnpd" >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.11.9
if [ -z "${DPKG_ROOT:-}" ] && [ "$1" = upgrade ] && [ -d /run/systemd/system ] ; then
	deb-systemd-invoke stop 'miniupnpd.service' >/dev/null || true
fi
# End automatically added section


exit 0