ha_control

#!/bin/bash

# credit: adapted from Qmail 'qmailctl' script

# assumes Home Assistant is using 'systemd' setup per https://home-assistant.io/docs/autostart/systemd/

##### configuration #####
sc=/bin/systemctl
ha=home-assistant@homeassistant.service
jc=/bin/journalctl
ha_user=homeassistant
ha_home=/home/homeassistant
ozw_log=$ha_home/.homeassistant/OZW_Log.txt
##### configuration #####

##### functions #####
function ha_status {
  $sc status $ha
}
function ha_stop {
  echo Stopping home assistant
  $sc stop $ha
}
function ha_start {
  echo Starting home assistant
  $sc start $ha
}
function ha_restart {
  echo Restarting home assistant
  ha_stop
  ha_start
}
function ha_disable {
  echo Disabling automatic start at boot
  $sc disable $ha
}
function ha_enable {
  echo Enabling automatic start at boot
  $sc enable $ha
}
function ha_logs {
  echo Viewing latest log entries:
  $jc -n 25 -u $ha
}
function ha_errors {
  echo View latest errors only in log entries:
  $jc -u $ha | grep -i error
}
function ha_backup {
  echo Back up configuration
  # must make a copy before tar otherwise HA may change file during the process
  cp -R $ha_home/.homeassistant $ha_home/config_temp
  timestamp=`date '+%Y%m%d_%H%M_%S'`
  tar -zcf $ha_home/ha_config_$timestamp.tar.gz $ha_home/config_temp
  rm -R $ha_home/config_temp
}
function ha_upgrade {
  # https://www.home-assistant.io/docs/installation/raspberry-pi/
  echo Upgrade to latest Home Assistant
  ha_stop
  echo su to user $ha_user for upgrades
  sudo -u $ha_user ./ha_upgrade
  echo Done as user $ha_user
  ha_start
  echo Upgrade process complete
}
function update_ssl {
  echo update SSL certs from Lets Encrypt
  /usr/bin/certbot renew --quiet --no-self-upgrade --standalone --preferred-challenges http-01
  echo if certbot failed, likely need to temporarily open router firewall for port 80
  cp /etc/letsencrypt/live/mroczek689154.duckdns.org/privkey.pem /home/homeassistant/ssl/privkey.pem
  cp /etc/letsencrypt/live/mroczek689154.duckdns.org/fullchain.pem /home/homeassistant/ssl/fullchain.pem
  echo give Home Assistant permissions
  chown $ha_user:$ha_user /home/homeassistant/ssl/*.pem
  echo ssl certificate update is complete
}
function check_systemd {
  ##### check that systemd is on the system #####
  systemd_expected=systemd
  systemd_result=`ps -p 1 -o comm=`

  if [ "$systemd_expected" != "$systemd_result"  ]; then
    echo System does not appear to be running "systemd"
    echo See https://home-assistant.io/docs/autostart/systemd/ for setup instructions
    exit 1
  fi
}
function check_root {
  ##### check if running as root #####
  # credit: https://askubuntu.com/questions/15853/how-can-a-script-check-if-its-being-run-as-root
  if [[ $EUID -ne 0 ]]; then
     echo "This script must be run as root"
     exit 1
  fi
}
##### end functions #####

######################
##### MAIN EVENT #####
######################

check_systemd
check_root

##### respond to the requested function #####
case "$1" in

  status)
    ha_status
  ;;
  start)
    ha_start
  ;;
  stop)
    ha_stop
  ;;
  restart)
    ha_restart
  ;;
  disable)
    ha_disable
  ;;
  enable)
    ha_enable
  ;;
  logs)
    ha_logs
  ;;
  errors)
    ha_errors
  ;;
  backup)
    ha_backup
  ;;
  upgrade)
    ha_upgrade
  ;;
  ssl)
    update_ssl
  ;;
  help)
    cat <<HELP

This script simplifies control of Home Assistant when running under "systemd".

Commands:
  status - displays status of Home Assistant daemon
  start - start Home Assistant daemon
  stop - stop Home Assistant daemon
  restart - restart the Home Assistant daemon
  enable - enables automatic start at boot
  disable - disables automatic start at boot
  logs - view latest log entries
  errors - view only errors in logs
  backup - back up all configuration files in a tar.gz file
  upgrade - upgrade to the latest release
  ozw - save Open Z-wave log file with timestamp
  ssl - update the SSL certificate

HELP
  ;;

  *)
    echo Command not recognized.  Usage:   $0 help
    exit 1
  ;;
esac

exit 0