#!/bin/bash
# 
# mlmmj-amime-receive
#
# Take mail from stdin, pipe it through altermime and then to mlmmj-receive
# needed to add footers in a MIME-aware way
#
# requires altermime, see http://www.pldaniels.com/altermime/
#
# just replace mlmmj-receive with mlmmj-amime-receive, e.g. in /etc/aliases:
# myml:   "|/usr/bin/mlmmj-amime-receive -L /var/spool/mlmmj/myml/"
#
# put the footer-text for the different MIME-types into 
# control/amime-footer-text
# control/amime-footer-html
# control/amime-footer-base64
#
# Copyright 2008 by Gerd v. Egidy, <gerd@egidy.de>
#
# Licensed under MIT License, see LICENSE file coming with mlmmj
#

MLMMJRECEIVE=/usr/bin/mlmmj-receive
ALTERMIME=/usr/bin/altermime

# check executables
if ! [ -x $MLMMJRECEIVE ]; then
    echo "can't find $MLMMJRECEIVE executable, aborting"
    exit 1
fi

if ! [ -x $ALTERMIME ]; then
    echo "can't find $ALTERMIME executable, aborting"
    exit 1
fi

# read parameters
I=1
PARAM_L=0
while [ $I -le $# ] && [ $PARAM_L == 0 ]; do
    if [ "${!I}" == "-L" ]; then
        PARAM_L=1
    fi
    I=$[$I+1]
done

if [ $PARAM_L == 1 ] && [ $I -le $# ]; then
    MLPATH="${!I}"
else
    echo "parameter -L /path/to/listdir missing, aborting"
    exit 1
fi

if ! [ -d "${MLPATH}" ]; then
    echo "${MLPATH} is not existing or no directory, aborting"
    exit 1
fi

CONTROLD="${MLPATH}/control"

if ! [ -d "${CONTROLD}" ]; then
    echo "${CONTROLD} is not existing or no directory, aborting"
    exit 1
fi

# look for footer-files and build parameters

if ! [ -f "${CONTROLD}/amime-footer-text" ]; then
    echo "${CONTROLD}/amime-footer-text is not existing or no regular file, aborting"
    exit 1
fi

PARAM="--disclaimer=${CONTROLD}/amime-footer-text"

if [ -f "${CONTROLD}/amime-footer-html" ]; then
    PARAM="${PARAM} --disclaimer-html=${CONTROLD}/amime-footer-html --htmltoo --force-for-bad-html"
fi

if [ -f "${CONTROLD}/amime-footer-base64" ]; then
    PARAM="${PARAM} --disclaimer-b64=${CONTROLD}/amime-footer-base64"
fi

PARAM="${PARAM} --altersigned --log-syslog"

# go to a dir where altermime can write it's tmp-files safely
cd $MLPATH

# pipe the calls
$ALTERMIME --input=- ${PARAM} | $MLMMJRECEIVE "$@"