#!/bin/bash
###############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2012  IPFire Network Development Team                         #
#                                                                             #
# 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 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program is distributed in the hope that it will be useful,             #
# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
# GNU General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
###############################################################################

function macro_file() {
	local macro=${1}
	assert isset macro

	# Make the name uppercase.
	macro=${macro^^}

	local file
	local dir
	for dir in ${FIREWALL_MACROS_DIRS}; do
		file="${dir}/${macro}"

		if [ -r "${file}" ]; then
			print "${file}"
			return ${EXIT_OK}
		fi
	done

	return ${EXIT_ERROR}
}

function macro_exists() {
	local macro=${1}
	assert isset macro

	macro_file ${macro} &>/dev/null \
		&& return ${EXIT_TRUE} || return ${EXIT_FALSE}
}

function macro_read() {
	local macro=${1}
	assert isset macro

	# Make the name uppercase.
	macro=${macro^^}

	local file=$(macro_file ${macro})
	assert isset file

	log DEBUG "Parsing macro '${macro}' (${file})."

	local src dst
	local sport dport
	local proto
	local var
	local line

	while read src dst proto sport dport; do
		# Skip lines that start with a "#".
		[ "${src:0:1}" = "#" ] && continue

		if [ "${src}" = "INCLUDE" ]; then
			macro_read ${dst}
			continue
		fi

		line=""

		# Remove all the dashes.
		for var in src dst proto sport dport; do
			[ "${!var}" = "-" ] && continue

			line="${line} ${var}=\"${!var}\""
		done

		line="$(echo ${line})"
		print "${line}"
	done < ${file}
}