#!/bin/bash

error_dialog(){
  DIALOGRC="${HOME}/.dialogerrrc" dialog --ok-label 'Continue' --nocancel \
    --title 'Error' \
    --msgbox "${1}" 0 0
}

run_in_chroot(){
  chroot '/target/' /bin/bash -c "${1}"
}

validate_pass(){
  #sanitize password too
  if [[ "${1}" == "${2}" ]];then
    return 0
  else
    error_dialog "Passwords do not match"
    return 1
  fi
}

validate_install_size(){
  #provide option to have no home part
  #automatically detect max rootfs partition size
  disk_size=$(echo '( '`lsblk -b --output SIZE -n -d "${dest_dev}"`' / 1048576 ) - 1024' | bc)
  if [[ "${disk_size}" -gt "${root_end}" ]];then
    return 0
  else
    error_dialog "Requested installation too large for target device"
    return 1
  fi
}

validate_username(){
  if [[ "${1}" =~ ^[a-z_]([a-z0-9_-]{0,31}|[a-z0-9_-]{0,30}\$)$ ]];then
    return 0
  else
    error_dialog "Bad username format"
    return 1
  fi
}

sanitize_hostname(){
  printf "%s" "${1}" | tr -dc '\-[:alnum:]\n\r' | tr '[:upper:]' '[:lower:]'
}

encrypt_partition(){
  echo -n "${3}" | cryptsetup luksFormat "${1}" -
  echo -n "${3}" | cryptsetup luksOpen "${1}" "${2}_crypt" -
}