postinst

#!/bin/sh -e
# Copyright (C) 2022 Fabian Mastenbroek.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# Source debconf library.
. /usr/share/debconf/confmodule

# Substitute a debconf answer into a configuration file with the syntax of
# /etc/udm-iptv.conf
replace_conf() {
    file="$1"
    setting="$2"
    value="$3";
    if grep -q "^${setting}=" "$file"; then
        value="$(echo "$value" | sed -e 's,[\@],\\&,g')"
        sed -i -re "s@^(${setting}=).*@\1\"${value}\"@" "$file"
    else
        echo >> "$file"
        echo "${setting}=\"${value}\"" >> "$file"
    fi
}

# Remove a debconf answer from a configuration file with the syntax of
# /etc/udm-iptv.conf
remove_conf() {
    file="$1"
    setting="$2"
    if grep -q "^${setting}=" "$file"; then
        sed -i -re "/^${setting}=.*$/d" "$file"
    fi
}

CONFIGFILE=/etc/udm-iptv.conf
tmpconf=$(mktemp -t iptv.XXXX.conf)

# Copy original configuration into temp file
cp "$CONFIGFILE" "$tmpconf" || true

db_get udm-iptv/wan-interface
replace_conf "$tmpconf" "IPTV_WAN_INTERFACE" "$RET"

db_get udm-iptv/wan-vlan
replace_conf "$tmpconf" "IPTV_WAN_VLAN" "$RET"

db_get udm-iptv/wan-vlan-interface
replace_conf "$tmpconf" "IPTV_WAN_VLAN_INTERFACE" "$RET"

db_get udm-iptv/wan-vlan-mac
if [ -n "$RET" ]; then
    replace_conf "$tmpconf" "IPTV_WAN_VLAN_MAC" "$RET"
else
    remove_conf "$tmpconf" "IPTV_WAN_VLAN_MAC"
fi

db_get udm-iptv/wan-ranges
replace_conf "$tmpconf" "IPTV_WAN_RANGES" "$(echo "$RET" | tr ',' ' ')"

db_get udm-iptv/wan-dhcp
if [ "$RET" = "false" ]; then
    replace_conf "$tmpconf" "IPTV_WAN_DHCP" "$RET"
else
    remove_conf "$tmpconf" "IPTV_WAN_DHCP"
fi

db_get udm-iptv/wan-dhcp-options
replace_conf "$tmpconf" "IPTV_WAN_DHCP_OPTIONS" "$RET"

db_get udm-iptv/wan-static-ip
if [ -n "$RET" ]; then
    replace_conf "$tmpconf" "IPTV_WAN_STATIC_IP" "$RET"
else
    remove_conf "$tmpconf" "IPTV_WAN_STATIC_IP"
fi

db_get udm-iptv/lan-interfaces
replace_conf "$tmpconf" "IPTV_LAN_INTERFACES" "$(echo "$RET" | tr ',' ' ')"


db_get udm-iptv/igmpproxy-program
replace_conf "$tmpconf" "IPTV_IGMPPROXY_PROGRAM" "$RET"

db_get udm-iptv/igmpproxy-quickleave
value="false"
if [ "$RET" = "false" ]; then
    value="true"
fi
replace_conf "$tmpconf" "IPTV_IGMPPROXY_DISABLE_QUICKLEAVE" "$value"

db_get udm-iptv/igmpproxy-debug
replace_conf "$tmpconf" "IPTV_IGMPPROXY_DEBUG" "$RET"

db_get udm-iptv/igmpproxy-igmp-version
replace_conf "$tmpconf" "IPTV_IGMPPROXY_IGMP_VERSION" "$RET"

# Replace file with updated configuration
mv "$tmpconf" "$(readlink -f "$CONFIGFILE")"

#DEBHELPER#

exit 0