send a message to Mailgun

message-to-Mailgun.bash

#!/bin/bash

# --------------------
# default
# --------------------

if [ -z "${GIST_CONF+x}" ]; then
    GIST_CONF="${HOME}/.Mailgun.conf"
fi

echo "GIST_CONF=${GIST_CONF}"

# mg_domain, api_key, MSG_SUBJ_PREFIX, MSG_FROM_EMAIL, & CURL if necessary
source ${GIST_CONF}

# --------------------

if [ -z ${CURL+x} ]; then
    CURL="/usr/bin/curl"
fi

if [ -z ${to_email+x} ]; then
    to_email="${1}"
fi

if [ -z ${MSG_SUBJ_PREFIX+x} ]; then
    MSG_SUBJ_PREFIX=""
fi

if [ -z ${subject+x} ]; then
    subject="${MSG_SUBJ_PREFIX}${2}"
fi

if [ -z ${text+x} ]; then
    text="${3}"
fi

if [ -z "${4}" ]; then
    from_email="${MSG_FROM_EMAIL}"
else
    from_email="${4}"
fi

mgUrlBase="https://api.mailgun.net/v3/${mg_domain}/messages"

## ${CURL} -s --user "api:${api_key}" \
#${CURL} --dump-header - --output - --user "api:${api_key}" \
#    https://api.mailgun.net/v3/${mg_domain}/messages \
#    -F from="${from_email}" \
#    -F to="${to_email}" \
#    -F subject="${subject}" \
#    -F text="${text}"

# Build curlCMD
curlCMD="${CURL} -s --user \"api:${api_key}\""
#curlCMD="${CURL} --dump-header - --output - --user \"api:${api_key}\""
#echo "curlCMD=\"${curlCMD}\""

curlCMD="${curlCMD} ${mgUrlBase}"
#echo "curlCMD=\"${curlCMD}\""

echo "from_email=\"${from_email}\""
curlCMD="${curlCMD} -F from=\"${from_email}\""
#echo "curlCMD=\"${curlCMD}\""

# default separator is ','
to_sep=','
# support an additional separator '|'
additional_sep='|'
# Check if there is ${additional_sep} in ${to_email}
[[ "${to_email}" == *"${additional_sep}"* ]] && to_sep="${additional_sep}"
to_list="${to_email}"

to_prev=''
to_first=`echo "${to_list}" | cut -f 1 -d ${to_sep} | tr -d '\n'`
to_list=`echo "${to_list}" | cut -f 2- -d ${to_sep} | tr -d '\n'`
while [ "XX${to_first}" != "XX${to_prev}" ]; do
	echo "to_first=\"${to_first}\"; to_prev=\"${to_prev}\""
	curlCMD="${curlCMD} -F to=\"${to_first}\""
#	echo "curlCMD=\"${curlCMD}\""

	to_prev="${to_first}"
	to_first=`echo "${to_list}" | cut -f 1 -d ${to_sep} | tr -d '\n'`
	to_list=`echo "${to_list}" | cut -f 2- -d ${to_sep} | tr -d '\n'`
done

curlCMD="${curlCMD} -F subject=\"${subject}\""
#echo "curlCMD=\"${curlCMD}\""

curlCMD="${curlCMD} -F text=\"${text}\""
#echo "curlCMD=\"${curlCMD}\""

# Execute curlCMD
eval "${curlCMD}"