#!/bin/sh

set -e

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

. /usr/share/debconf/confmodule

replace_config () {
	if [ -s "${1}" ]; then
		sed -ri '
x
s|^$||
t find
x
b
: find
x
s|^\s*('"${2}"'=).*|\1'"${3}"'|
t end
s|^#[ \t#]*('"${2}"'=['\'\"']?'"${3}"'['\'\"']?)\s*$|\1|
t end
s|^#[ \t#]*('"${2}"'=)\s*$|\1'"${3}"'|
t end
$ a'"${2}"'='"${3}"'
b
: end
h
		' "${1}"
	else
		echo "${2}=${3}" > "${1}"
	fi
}

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}"
}

read_config () {
	sed -rn '
s|^\s*'"${2}"'='\''([^'\'']+)'\''\s*$|\1|g
t hold
s|^\s*'"${2}"'='\"'([^'\"']+)'\"'\s*$|\1|g
t hold
s|^\s*'"${2}"'=(\S+)\s*$|\1|
t hold
b
: hold
p
	' "${1}"
}


# Automatically added by dh_installinit/13.11.9
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/miniupnpd" ]; then
		update-rc.d miniupnpd defaults-disabled >/dev/null || exit 1
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.11.9
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if deb-systemd-helper debian-installed 'miniupnpd.service'; then
		# The following line should be removed in trixie or trixie+1
		deb-systemd-helper unmask 'miniupnpd.service' >/dev/null || true

		if deb-systemd-helper --quiet was-enabled 'miniupnpd.service'; then
			# Create new symlinks, if any.
			deb-systemd-helper enable 'miniupnpd.service' >/dev/null || true
		fi
	fi

	# Update the statefile to add new symlinks (if any), which need to be cleaned
	# up on purge. Also remove old symlinks.
	deb-systemd-helper update-state 'miniupnpd.service' >/dev/null || true
fi
# End automatically added section


case "${1}" in
configure)
	#########################################################################
	### Maintain the uuid value in the /etc/miniupnpd/miniupnpd.conf file ###
	#########################################################################
	# Make sure /etc/miniupnpd is there. It's in debian/dirs
	# already, but we want to make sure an admin didn't delete it.
	if ! [ -e /etc/miniupnpd ] ; then
		mkdir -p /etc/miniupnpd
	elif ! [ -d /etc/miniupnpd ] ; then
		echo "Something is wrong: /etc/miniupnpd exists, but is not a directory!"
		exit 1
	fi
	# Make sure we have a /etc/miniupnpd/miniupnpd.conf
	if ! [ -e "${CONFFILE}" ] ; then
		cp -f /usr/share/miniupnpd/miniupnpd.conf "${CONFFILE}"
	fi

	# This postinst will generate a random uuid for miniupnpd
	# only if the uuid= directive is either not there, or empty.
	# in all other cases, the script will keep the existing
	# uuid and not modify it.
	if [ -z "$(read_config ${CONFFILE} uuid)" ] ; then
		replace_config "${CONFFILE}" uuid $(uuidgen)
	fi

	#########################################################
	### Maintain the /etc/default/miniupnpd configuration ###
	#########################################################
	if ! [ -e "${DEFAULT_FILE}" ] ; then
		cp /usr/share/miniupnpd/miniupnpd.default "${DEFAULT_FILE}"
	fi

	db_get miniupnpd/listen
	LISTEN_IP="${RET}"
	remove_config_all "${CONFFILE}" listening_ip
	append_config "${CONFFILE}" listening_ip ${LISTEN_IP}

	db_get miniupnpd/iface
	IFACE="${RET}"
	remove_config_all "${CONFFILE}" ext_ifname
	append_config "${CONFFILE}" ext_ifname ${IFACE}

	db_get miniupnpd/ip6script
	if [ "${RET}" = "true" ] ; then
		replace_config "${DEFAULT_FILE}" MiniUPnPd_ip6tables_enable 1
	else
		replace_config "${DEFAULT_FILE}" MiniUPnPd_ip6tables_enable 0
	fi

	db_get miniupnpd/force_igd_desc_v1
	if [ "${RET}" = "true" ] ; then
		replace_config "${CONFFILE}" force_igd_desc_v1 yes
	else
		replace_config "${CONFFILE}" force_igd_desc_v1 no
	fi

	db_get miniupnpd/start_daemon
	if [ "${RET}" = "true" ] ; then
		update-rc.d miniupnpd enable >/dev/null
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		invoke-rc.d miniupnpd $_dh_action || exit 1
		# if false, don't disable it - no-enable on first installation and keep everything untouched during upgrade
	fi

	db_stop
;;
abort-upgrade|abort-remove|abort-deconfigure)
;;
*)
	echo "postinst called with unknown argument \`${1}'" >&2
	exit 1
;;
esac

exit 0