#!/bin/sh
#
# pushover.sh: Shell script to push messages to mobile devices via Pushover (https://pushover.net/)
#
# Florian Schäfer <florian.schaefer@gmail.com>, 2013-02-04
#
# Requires curl(1), grep(1) and sed(1).
#

VERSION="1.0"
PROGNAME="$(basename $0)"

CONFIG="${HOME}/.pushover"

PUSHOVER_USER_TOKEN=""
PUSHOVER_API_TOKEN=""
PUSHOVER_TARGET_DEVICE=""
PUSHOVER_MESSAGE_TEXT=""
PUSHOVER_MESSAGE_TITLE=""
PUSHOVER_MESSAGE_URL=""
PUSHOVER_MESSAGE_URL_TITLE=""
PUSHOVER_MESSAGE_PRIORITY=""
PUSHOVER_MESSAGE_TIMESTAMP=""
PUSHOVER_NOTIFICATION_SOUND=""

if [ -f "${CONFIG}" ]
then
    . "${CONFIG}"
fi

print_usage () {
    cat <<EOT
Usage:  ${PROGNAME} -u <user key> -a <api key> [<options>] message

Supported options:
    -h              print this help message
    -v              print version
    -u  <user key>  user key (not e-mail address)
    -a  <api key>   application's API token
    -m  <message>   the message to send
    -d  <device>    device identifier to send the message directly to
    -q  <title>     message's title, otherwise uses the app's name
    -w  <url>       a supplementary URL to show with the message
    -e  <url title> a title for the supplementary URL
    -p  <priority>  set to "1" to display as high-priority and bypass quiet hours,
                    or "-1" to always send as a quiet notification
    -t  <timestamp> a Unix timestamp to show message the with a particular time
    -s  <sound>     name of one of the sounds supported by device clients to override
                    the user's default sound choice
EOT
}

print_version () {
    echo "${PROGNAME} ${VERSION}"
}

push_message () {
    curl -ks \
        -F "token=${PUSHOVER_API_TOKEN}" \
        -F "user=${PUSHOVER_USER_TOKEN}" \
        -F "message=${PUSHOVER_MESSAGE_TEXT}" \
        -F "device=${PUSHOVER_TARGET_DEVICE}" \
        -F "title=${PUSHOVER_MESSAGE_TITLE}" \
        -F "url=${PUSHOVER_MESSAGE_URL}" \
        -F "url_title=${PUSHOVER_MESSAGE_URL_TITLE}" \
        -F "priority=${PUSHOVER_MESSAGE_PRIORITY}" \
        -F "timestamp=${PUSHOVER_MESSAGE_TIMESTAMP}" \
        -F "sound=${PUSHOVER_NOTIFICATION_SOUND}" \
        https://api.pushover.net/1/messages.json
}

while getopts hvu:a:m:d:q:w:e:p:t:s: OPT; do
    case "${OPT}" in
        h|\?)
            print_version
            print_usage
            exit 0
            ;;
        v)
            print_version
            exit 0
            ;;
        u)
            PUSHOVER_USER_TOKEN="${OPTARG}"
            ;;
        a)
            PUSHOVER_API_TOKEN="${OPTARG}"
            ;;
        m)
            PUSHOVER_MESSAGE_TEXT="${OPTARG}"
            ;;
        d)
            PUSHOVER_TARGET_DEVICE="${OPTARG}"
            ;;
        q)
            PUSHOVER_MESSAGE_TITLE="${OPTARG}"
            ;;
        w)
            PUSHOVER_MESSAGE_URL="${OPTARG}"
            ;;
        e)
            PUSHOVER_MESSAGE_URL_TITLE="${OPTARG}"
            ;;
        p)
            PUSHOVER_MESSAGE_PRIORITY="${OPTARG}"
            ;;
        t)
            PUSHOVER_MESSAGE_TIMESTAMP="${OPTARG}"
            ;;
        s)
            PUSHOVER_NOTIFICATION_SOUND="${OPTARG}"
            ;;
        *)
            print_version >&2
            print_usage >&2
            exit 1
            ;;
    esac
done

shift "$(expr ${OPTIND} - 1)"

if [ -z "${PUSHOVER_MESSAGE_TEXT}" ]
then
    PUSHOVER_MESSAGE_TEXT="$*"
fi

if [ -z "${PUSHOVER_USER_TOKEN}" -o -z "${PUSHOVER_API_TOKEN}" -o -z "${PUSHOVER_MESSAGE_TEXT}" ]
then
    print_version >&2
    print_usage >&2
    exit 1
fi

RETVAL="$(push_message)"
if echo "${RETVAL}" | grep -i -q "error"
then
    ERROR="$(echo ${RETVAL} | sed 's/.*errors\":\[\(".*"\)\].*/\1/')"
    echo "error: ${ERROR}" >&2
    exit 1
fi

# EOF