_reload_http() {
  set -u
  if systemctl is-active 'httpd.service' >/dev/null; then
    systemctl reload 'httpd.service' # graceful
  fi
  set +u
}

_start_systemd() {
  systemctl daemon-reload
  systemctl enable 'avantfax.phb.timer'
  systemctl start 'avantfax.phb.timer'
  systemctl enable 'avantfax.cron.timer'
  systemctl start 'avantfax.cron.timer'
}

post_upgrade() {
  set -u
  _start_systemd
  avantfaxsetup.sh 2 'build' 'post' # updates are applied here from backup copied below
  set +u
}

pre_upgrade() {
  set -u
  avantfaxsetup.sh 1 'preun'
  avantfaxsetup.sh 2 'pre' # copy backup info to apply update above
  set +u
}

pre_install() {
  :
}

post_install() {
  set -u
  _start_systemd
  avantfaxsetup.sh 1 'build' 'pre' 'post'
  local _opt_SOURCEONLY=1; . 'avantfaxsetup.sh'; unset _opt_SOURCEONLY
  _httpinclude="Include conf/extra/httpd-${_opt_AVANTFAX_SERVERNAME}.conf"
  _httpconf='/etc/httpd/conf/httpd.conf'
  if ! grep "${_httpinclude}"'$' "${_httpconf}" &>/dev/null; then
    if [ "${_opt_AUTO_START_HTTP}" -ne 0 ]; then
      echo "${_httpinclude}" >> "${_httpconf}"
      _reload_http
    else
      echo "# ${_httpinclude}" >> "${_httpconf}"
      echo "Enable Include ... ${_opt_AVANTFAX_SERVERNAME} in httpd.conf"
    fi
  fi
  set +u
}

pre_remove() {
  set -u
  systemctl stop 'avantfax.phb.timer'
  systemctl disable 'avantfax.phb.timer'
  systemctl stop 'avantfax.cron.timer'
  systemctl disable 'avantfax.cron.timer'
  local _opt_SOURCEONLY=1; . 'avantfaxsetup.sh'; unset _opt_SOURCEONLY
  _httpinclude="Include conf/extra/httpd-${_opt_AVANTFAX_SERVERNAME}.conf"
  _httpconf='/etc/httpd/conf/httpd.conf'
  _conftemp='/tmp/avantfax.httpd.conf'
  if grep "${_httpinclude}"'$' "${_httpconf}" &>/dev/null; then
    rm -f "${_conftemp}"
    cp -p "${_httpconf}" "${_conftemp}"
    grep -v "${_httpinclude}"'$' "${_conftemp}" > "${_httpconf}"
    rm -f "${_conftemp}"
    _reload_http
  fi
  avantfaxsetup.sh 0 'preun'
  cp -p '/usr/bin/avantfaxsetup.sh'{,.password} '/tmp'
  set +u
}

post_remove() {
  set -u
  systemctl daemon-reload
  /tmp/avantfaxsetup.sh 0 'postun'
  local _opt_SOURCEONLY=1; . '/tmp/avantfaxsetup.sh'; unset _opt_SOURCEONLY
  # This completely removes your config. Not everyone may want this.
  rm -rf "/usr/share/webapps/${_opt_AVANTFAX_SERVERNAME}" '/root/avantfaxbackup'
  rm -f '/tmp/avantfaxsetup.sh'{,.password} '/usr/bin/avantfaxsetup.sh.password'
  set +u
}