#!/bin/zsh
# Version 01.0
# Script to add a new slave zone to /etc/bind/named.conf.local on ns2.dynproxy.net
# Script Name: bind_add_slave_zone.sh

# Variables
NAMED_CONF="/etc/bind/named.conf.local"
CACHE_DIR="/var/cache/bind"

# Check if a domain name argument is provided
if [ -z "$1" ]; then
	echo "Usage: $0 <domain.tld>"
	exit 1
fi

DOMAIN=$1
ZONE_FILE="$CACHE_DIR/db.$DOMAIN"

# Check if the zone configuration already exists
if grep -q "zone \"$DOMAIN\"" $NAMED_CONF; then
	echo "Zone $DOMAIN already exists in $NAMED_CONF. Aborting!"
	exit 2
fi

# Append zone configuration to named.conf.local
echo "Adding slave zone configuration for $DOMAIN to $NAMED_CONF"
cat <<EOF >> $NAMED_CONF
zone "$DOMAIN" {
	type slave;
	file "$ZONE_FILE";
	masters { 23.88.113.138; };
	allow-transfer { key "ns3-key"; };
};
EOF

# Reload BIND configuration
echo "Reloading BIND configuration"
rndc reload

# Success message
echo "Slave zone for $DOMAIN has been added successfully"