#!/bin/sh
usage()
{
    echo "usage"
    echo "====="
    echo ""
    echo "reads a csv-file with member-data and a text-template from template"
    echo "uses erb to fill the template with data, encrpyt and sign the mail with the members public pgp key and send it via swaks(swiss army knife for smtp)"
    echo ""
    echo "./$0"
    echo "\t-h --help"
    echo "\t--member-data=member-data.csv"
    echo "\t--template=template.erb"
    echo "\t--subject=subject"
    echo "\t--smtphost=smtphost"
    echo "\t--smtpuser=smtpuser"
    echo "\t--smtppassword=smtppassword"
    
    echo ""
}

while [ "$1" != "" ]; do
    PARAM=`echo $1 | awk -F= '{print $1}'`
    VALUE=`echo $1 | awk -F= '{print $2}'`
    case $PARAM in
	-h | --help)
            usage
            exit
            ;;
	-n)
	    DRYRUN=1
	    ;;
        --member-data)
            MEMBER_DATA=$VALUE
            ;;
        --template)
            TEMPLATE=$VALUE
            ;;
        --subject)
            SUBJECT=$VALUE
            ;;
        --smtphost)
            SMTPHOST=$VALUE
            ;;
        --smtpuser)
            SMTPUSER=$VALUE
            ;;
        --smtppassword)
            SMTPPASSWORD=$VALUE
            ;;
        *)
            echo "ERROR: unknown parameter \"$PARAM\""
            usage
            exit 1
            ;;
    esac
    shift
done

if [ -z "$MEMBER_DATA" ] ; then
    echo "parameter member-data missing"
    echo ""
    usage
    exit
fi

if [ -z "$TEMPLATE" ] ; then
    echo "parameter template missing"
    echo ""
    usage
    exit
fi

if [ -z "$SUBJECT" ] ; then
    echo "parameter userid missing"
    echo ""
    exit
fi

echo "MEMBER_DATA = "$MEMBER_DATA
echo "TEMPLATE = "$TEMPLATE
echo "SUBJECT = "$SUBJECT

if [ -z "$DRYRUN" ] ; then
    echo "real run"
    erb column1=Column1 column2=Column2 column3=Column3 $TEMPLATE\
	| gpg2 --batch --yes -vvv -u vorstand@wtf-eg.de \
	       --no-emit-version -eas -r "42152130EE5C8BED881AB911D65BA8BC7E8B9302" \
	| swaks --to frank.landgraf@web.de \
		--from "vorstand@wtf-eg.de" \
		-tls \
                --auth LOGIN \
		--server $SMTPHOST \
		--auth-user $SMTPUSER \
		--auth-password $SMTPPASSWORD \
    		--header "Subject: $SUBJECT" --body -    
else
    echo "dry run"
    erb column1=Column1 column2=Column2 column3=Column3 $TEMPLATE
    erb column1=Column1 column2=Column2 column3=Column3 $TEMPLATE|gpg2 --batch --yes -vvv -u vorstand@wtf-eg.de --no-emit-version -eas -r "42152130EE5C8BED881AB911D65BA8BC7E8B9302"
 fi