#!/bin/bash
# send_dcvsessionready_notification.sh script to send a notification by email using AWS SNS
exec 2>"/var/log/send-notification.log"
set -x
_msg_already_sent="/var/run/dcv_msg_sent"
_ip_address="$(curl -s http://checkip.amazonaws.com)"
_region="$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | jq -r .region)"
_subject="DCV Session is ready."
_message="
Dear User,
your DCV session is ready.
Please connect to https://${_ip_address}:8443
and login with your credentials.
Thanks,
Best Regards.
"
# wait dcv session is started
while true; do
    ps -ef | grep Xdcv | grep xauth 2>&1 >/dev/null && break
    sleep 2
done
_topic_arn="$(/usr/local/bin/aws secretsmanager get-secret-value \
                                 --secret-id DCV_Session_Ready_Notification \
                                 --query SecretString  --output text 2>/dev/null | \
              jq -r '.sns_topic_arn')"
if [ -n "${_topic_arn}" ] ; then
    # publish the notification
    if [ ! -r "${_msg_already_sent}" ] ; then
       /usr/local/bin/aws sns publish --message "${_message}" \
                       --subject "DCV Session is ready!" \
                       --topic-arn "${_topic_arn}" \
                       --region "${_region}" && touch "${_msg_already_sent}"
    fi
fi