#!/bin/sh

CACHE_DOMAINS_DIR="/var/cache-domains"
CACHE_DOMAINS_SRC="https://api.github.com/repos/uklans/cache-domains/tarball/master"
CONFIG_FILE="/etc/cache-domains.json"

configure() {
	mkdir -p ${CACHE_DOMAINS_DIR}
	rm -fr ${CACHE_DOMAINS_DIR}/*

	if ! wget -qO - ${CACHE_DOMAINS_SRC} | tar -xzC ${CACHE_DOMAINS_DIR}; then
		echo "ERROR: Could not retrieve ${CACHE_DOMAINS_SRC}"
		return 1
	fi

	INITIAL_DIR="$(pwd)"
	cd ${CACHE_DOMAINS_DIR}/*/scripts/

	if [ ! -f ${CONFIG_FILE} ]; then
		cp config.example.json ${CONFIG_FILE}
		echo "Using example config file ${CONFIG_FILE}"
	fi

	cp ${CONFIG_FILE} config.json
	./create-dnsmasq.sh
	cp ./output/dnsmasq/* /var/dnsmasq.d/

	cd ${INITIAL_DIR}

	/etc/init.d/dnsmasq restart
}

cleanup() {
	# leave dnsmasq in a clean state
	for FILE in ${CACHE_DOMAINS_DIR}/*/scripts/output/dnsmasq/*; do
		rm -f /tmp/dnsmasq.d/$(basename ${FILE})
	done

	/etc/init.d/dnsmasq restart
}

case ${1} in
	config*)
		configure
		;;
	clean*)
		cleanup
		;;
	*)
		echo "${0} <configure|cleanup>"
		;;
esac