post_install() {
  echo ':: In order to enable nordvpn you have to start the following service:'
  echo '     sudo systemctl enable --now nordvpnd'
  echo ':: You have to add yourself to the nordvpn group:'
  echo "     sudo gpasswd -a USERNAME nordvpn"
  echo ':: You then have to restart for the group to be created:'
  echo "     reboot"
  # Add logic to avoid interposing with sqlite library if it already exists
  for lib in /usr/lib/nordvpn/*.so ; do
    if [[ -f $lib ]] ; then
      if [[ ! -f "/usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)" ]] ; then
        ln -s $lib /usr/lib/
      fi
    fi
  done
}

post_upgrade() {
  # Add logic to avoid interposing with sqlite library if it already exists
  for lib in /usr/lib/nordvpn/*.so ; do
    if [[ -f $lib ]] ; then
      if [[ $(readlink -- /usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)) == $lib ]] ; then
        unlink /usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)
      fi
      if [[ ! -f "/usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)" ]] ; then
        ln -s $lib /usr/lib/
      fi
    fi
  done
}

pre_install() {
  if [ -d /var/lib/nordvpn/data/ ] ; then
  	chattr -i /var/lib/nordvpn/data/*
  fi
  ## Remove symbolic link from latest patch
  if [[ $(readlink -- /usr/lib/libxml2.so.2) == /usr/lib/nordvpn/libxml2.so.2 ]] ; then
    unlink /usr/lib/libxml2.so.2
  fi
  echo "::: README"
  echo "::: Before use, install libxml2-legacy from extra repository."
  echo "::: It is flagged as optional, but it will be mandatory in next release,"
  echo "::: in case NordVPN had not built against the new libxml2 just yet."
  echo "::: 3.20.2-3 was made to remove the symbolic link from previous patch"
}

pre_upgrade() {
  chattr -i /var/lib/nordvpn/data/*
  ## Remove symbolic link from latest patch
  if [[ $(readlink -- /usr/lib/libxml2.so.2) == /usr/lib/nordvpn/libxml2.so.2 ]] ; then
    unlink /usr/lib/libxml2.so.2
  fi
  echo "::: README"
  echo "::: Before use, install libxml2-legacy from extra repository."
  echo "::: It is flagged as optional, but it will be mandatory in next release,"
  echo "::: in case NordVPN had not built against the new libxml2 just yet."
  echo "::: 3.20.2-3 was made to remove the symbolic link from previous patch"
}

pre_remove() {
  chattr -i /var/lib/nordvpn/data/*
  # Add logic to avoid interposing with sqlite library if it already exists
  for lib in /usr/lib/nordvpn/*.so ; do
    if [[ -f $lib ]] ; then
      if [[ $(readlink -- /usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)) == $lib ]] ; then
        unlink /usr/lib/$(printf '%s' $lib | cut -d '/' -f 5)
      fi
    fi
  done
  ## Remove symbolic link from latest patch
  if [[ $(readlink -- /usr/lib/libxml2.so.2) == /usr/lib/nordvpn/libxml2.so.2 ]] ; then
    unlink /usr/lib/libxml2.so.2
  fi
}