#!/usr/bin/env bash

# Send UPS report to designated email address
# Reference: http://networkupstools.org/docs/developer-guide.chunked/apas01.html

### Parameters ###

# Specify your email address here:
email=""

# Set to a value greater than zero to include all available UPSC
# variables in the report:
senddetail=0

freenashost=$(hostname -s)
logfile="/tmp/ups_report.tmp"
subject="UPS Status Report for ${freenashost^^}"

### Set email headers ###
(
 echo "To: ${email}"
 echo "Subject: ${subject}"
 echo "Content-Type: text/html"
 echo "MIME-Version: 1.0"
 echo -e "\r\n"
) > ${logfile}

declare ups_type
declare ups_mfr
declare ups_model
declare ups_serial
declare ups_load
declare ups_realpower
declare ups_batterycharge
declare ups_batteryruntime
declare ups_batteryvoltage
declare ups_inputvoltage
declare ups_outputvoltage

get_ups_info()
{
  ups_type=$(upsc "${ups}" device.type 2> /dev/null)
  ups_mfr=$(upsc "${ups}" ups.mfr 2> /dev/null)
  ups_model=$(upsc "${ups}" ups.model 2> /dev/null)
  ups_serial=$(upsc "${ups}" ups.serial 2> /dev/null)
  ups_status=$(upsc "${ups}" ups.status 2> /dev/null)
  ups_load=$(upsc "${ups}" ups.load 2> /dev/null)
  ups_realpower=$(upsc "${ups}" ups.realpower 2> /dev/null)
  ups_realpowernominal=$(upsc "${ups}" ups.realpower.nominal 2> /dev/null)
  ups_batterycharge=$(upsc "${ups}" battery.charge 2> /dev/null)
  ups_batteryruntime=$(upsc "${ups}" battery.runtime 2> /dev/null)
  ups_batteryvoltage=$(upsc "${ups}" battery.voltage 2> /dev/null)
  ups_inputvoltage=$(upsc "${ups}" input.voltage 2> /dev/null)
  ups_outputvoltage=$(upsc "${ups}" output.voltage 2> /dev/null)
}

# Get a list of all ups devices installed on the system:

upslist=$(upsc -l "${freenashost}")

### Set email body ###
(
 echo "<pre style=\"font-size:14px\">"
 date "+Time: %Y-%m-%d %H:%M:%S"
 echo ""
 for ups in $upslist; do
   get_ups_info
   printf "=== %s %s, model %s, serial number %s\n\n" "${ups_mfr}" "${ups_type^^}" "${ups_model}" "${ups_serial} ==="
   echo "Name: ${ups}"
   echo "Status: ${ups_status}"
   echo "Output Load: ${ups_load}%"
   if [[ ! -z ${ups_realpower} ]]; then
     echo "Real Power: ${ups_realpower}W"
   fi
   if [[ ! -z ${ups_realpowernominal} ]]; then
     echo "Real Power: ${ups_realpowernominal}W (nominal)"
   fi
   if [[ ! -z ${ups_inputvoltage} ]]; then
     echo "Input Voltage: ${ups_inputvoltage}V"
   fi
   if [[ ! -z ${ups_outputvoltage} ]]; then
     echo "Output Voltage: ${ups_outputvoltage}V"
   fi
   echo "Battery Runtime: ${ups_batteryruntime}s"
   echo "Battery Charge: ${ups_batterycharge}%"
   echo "Battery Voltage: ${ups_batteryvoltage}V"
   echo ""
   if (( senddetail > 0 )); then
     echo "=== ALL AVAILABLE UPS VARIABLES ==="
     upsc "${ups}"
     echo ""
   fi
 done
) >> ${logfile}

echo "</pre>" >> ${logfile}

### Send report ###
if [ -z "${email}" ]; then
  echo "No email address specified, information available in ${logfile}"
else
  sendmail -t < ${logfile}
  rm ${logfile}
fi