#!/bin/bash
# Author  : Gaston Gonzalez
# Date    : 15 January 2025
# Updated : 17 January 2025
# Purpose : Restore backup to user's home directory.

BACKUP_FILE_PATTERN="etc-user-backup-*.tar.gz"
USB_MEDIA_MOUNT=/media

options=()

# 1. Search home directory
echo "Searching ${HOME} for backup files...."
while IFS= read -r backup; do
  options+=("${backup}" "")
done < <(find ~ -type f -name ${BACKUP_FILE_PATTERN} 2> /dev/null)

# 2. Search attached USB drive
DF_OUT=$(df -h | grep ${USB_MEDIA_MOUNT})
if [ $? -eq 0 ]; then
 echo "Searching ${USB_MEDIA_MOUNT} for backup files...."
  while IFS= read -r backup; do
    options+=("${backup}" "")
  done < <(find ${USB_MEDIA_MOUNT} -type f -name ${BACKUP_FILE_PATTERN} 2> /dev/null)
fi

selected_file=$(dialog --clear --menu "Select a backup to restore" 20 80 10 "${options[@]}" 3>&1 1>&2 2>&3)
exit_status=$?

tput sgr 0 && clear

[ ${exit_status} -ne 0 ] && echo "No backup selected. Exiting." && exit 1

[ ! -e "${selected_file}" ] && echo "File ${selected_file} does not exist. Exiting." 

CWD_DIR=$(pwd)

cd ~ && tar -xzf "${selected_file}"

if [ $? -eq 0 ]; then
  echo "${selected_file} restored to ${HOME}."
else
  echo "An error occured while attempting to restore ${selected_file}"
fi

cd ${CWD}