post_install() {
  if ! getent group powerdns-admin >/dev/null; then
    groupadd -g 980 --system powerdns-admin 
  fi
  if ! getent passwd powerdns-admin >/dev/null; then
    useradd -u 980 --system -c 'powerdns-admin worker user' -g powerdns-admin -d /usr/share/webapps/powerdns-admin -s /usr/bin/nologin powerdns-admin
  fi
  echo Configure database properties in /etc/webapps/powerdns-admin/config.py and
  echo create database using /usr/share/webapps/powerdns-admin/create_db.py
}

post_upgrade() {
  post_install $1
}

pre_remove() {
  userdel powerdns-admin 2>/dev/null >/dev/null
  groupdel powerdns-admin 2>/dev/null >/dev/null
  
  if getent passwd powerdns-admin >/dev/null; then
    echo You may need to delete powerdns-admin user manually
  fi
  if getent group powerdns-admin >/dev/null; then
    echo You may need to delete powerdns-admin group manually
  fi
}