#!/bin/sh
#-----------------------------------------------------------------------------
# /var/install/bin/postgresql-common-sendmail
#
# Creation:     2021-10-23 dv
# Last Update:  2023-07-23 09:11:10
#
# Copyright (c) 2024 the eisfair team, team(at)eisfair(dot)org
#
# 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 2 of the License, or
# (at your option) any later version.
#-----------------------------------------------------------------------------

. /var/install/include/eislib

#-----------------------------------------------------------------------------
# show help on arguments and possible options
# @param  n/a
# @return n/a
#-----------------------------------------------------------------------------
show_help()
{
cat <<EOF

Send notification e-mail

usage: ${0} [OPTIONS]

options:
   --help               show this help screen
   --receipient         email receipient
   --sender             email sender's name
   --subject            email subject
   --file               file to be send

EOF

}

# -----------------------------------------------------------------------------
# send email using local sendmail
# -----------------------------------------------------------------------------
send_email()
{
    local email_address=${1}
    local email_sender=${2}
    local subject=${3}
    local file=${4}

    if [ -f /usr/sbin/sendmail ] && [ -n "${email_address}" ]
    then
        if [ -f /etc/config.d/mail ]
        then
            . /etc/config.d/mail
            smtp_qualify_domain="${SMTP_QUALIFY_DOMAIN}"
        elif [ -f /var/install/config.d/vmail.sh ]
        then
            smtp_qualify_domain=$(/var/install/config.d/vmail.sh getdomain)
        else
            smtp_qualify_domain="${HOSTNAME}"
        fi

        {
            echo "From: ${email_sender} <${email_sender}@${smtp_qualify_domain}>"
            echo "To: postgresql admin <${email_address}>"
            echo "Subject: ${subject}"
            echo

            if [ -f "${file}" ]
            then
                cat "${file}"
            fi
            echo "."
        } | \
        /usr/sbin/sendmail "${email_address}"
    fi
}

# ---------------------------------------------------------------------------
# main routine
# ---------------------------------------------------------------------------
main()
{
    local receipient=""
    local sender=""
    local subject=""
    local file=""

    # read option switches
    while [ "${1:0:2}" = "--" ]
    do
        case ${1} in
        --help)
            show_help
            exit 0
            ;;
        --receipient)
            shift
            receipient="${1}"
            shift
            ;;
        --receipient=*)
            receipient="${1:13}"
            shift
            ;;
        --sender)
            shift
            sender="${1}"
            shift
            ;;
        --sender=*)
            sender="${1:9}"
            shift
            ;;
        --subject)
            shift
            subject="${1}"
            shift
            ;;
        --subject=*)
            subject="${1:10}"
            shift
            ;;
        --file)
            shift
            file="${1}"
            shift
            ;;
        --file=*)
            file="${1:7}"
            shift
            ;;
        *)
            echo "error: invalid option switch \"$1\"!" >&2
            exit 1
            ;;
        esac
    done

    if [ "$#" -gt "0" ]
    then
        echo "error: invalid option switch \"$1\"!" >&2
        exit 1
    fi

    send_email "${receipient}" "${sender}" "${subject}" "${file}"
    return "${?}"
}


# ---------------------------------------------------------------------------
# call function main
# ---------------------------------------------------------------------------
main "${@}"

exit 0

# ---------------------------------------------------------------------------
# end
# ---------------------------------------------------------------------------