#!/bin/sh
#
# /usr/local/sbin/localmailtransportinit
# Copyright 2006 Jonas Smedegaard <dr@jones.dk>
#
# $Id: localmailtransportupdate,v 1.2 2006-07-28 17:04:48 jonas Exp $
#
# Setup postfix transport map for a redpill organisation
#

set -e

PRG=`basename $0`

TEMP=$(getopt -s sh -o fid:h -l force,init,diffopts:,help -n "$PRG" -- "$@")
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
eval set -- "$TEMP"

function usage()	{
	echo "Usage: $PRG [opts...]"
	echo
	echo "  -f, --force                Update without asking for confirmation"
	echo "  -i, --init                 Setup postfix to use the transport map"
	echo "  -d, --diffopts=diffopts    Extra options applied to diff when"
	echo "                             comparing current and new map"
	echo "    -h|--help                This help text"
	exit 1
}

function exit1()	{
	echo "Error: $1"
	echo "Exiting..."
	exit 1
}

force=""
init=""
diffopts=""
while true ; do
	case "$1" in
		-f|--force) force="1" ; shift ;;
		-i|--init) init="1" ; shift ;;
		-d|--diffopts) diffopts="1" ; shift ;;
		-h|--help) usage;;
		--) shift ; break ;;
		*) exit1 "Internal error!";;
	esac
done

firstitem() {
	file="$1"

	cat "$file" | grep -v '^#' | sed 's/#.*//' | head -n 1
}

items() {
	file="$1"

	cat "$file" | grep -v '^#' | sed 's/#.*//'
}

mktransportmap() {
	for realm in $@; do
		realmdir="/etc/local-$realm"
		[ -d "$realmdir/redpill" ] || continue
		mailhost="$(firstitem "$realmdir/redpill/mailhost")"
		maildomains="$(items "$realmdir/redpill/maildomains")"
		for maildomain in $maildomains; do
			echo "$maildomain	relay:$mailhost:submission"
		done
	done
}

mktransportmap $(items /etc/local-ORG/realms) > /etc/postfix/transport.new
if [ -f /etc/postfix/transport.addon ]; then
	cat /etc/postfix/transport.addon >> /etc/postfix/transport.new
fi
( cd /etc/postfix && diff $diffopts transport transport.new )
if [ "$force" = "1" ]; then
	do_update="y"
else
	echo -n "Above is the intended changes. OK to update (y/N)? "
	read do_update
fi
case $do_update in
    y|Y)
	mv /etc/postfix/transport.new /etc/postfix/transport
	postmap /etc/postfix/transport
	echo "Changes applied!"
	;;
    *)
	echo "Aborted!"
	exit 1
	;;
esac
if [ "$init" = "1" ]; then
	postconf -e "transport_maps = hash:/etc/postfix/transport"
	invoke-rc.d postfix reload
fi