unrm

#!/bin/bash

archivedir="$HOME/.deleted-files"
realrm="$(which rm)"
move="$(which mv)"

dest=$(pwd)

if [ ! -d "$archivedir" ]
then
  echo "$(basename $0) fail - No delete directory, nothing to restore" >&2
  exit 1
fi

cd $archivedir

if [ $# -eq 0 ]
then
  echo "Contents of your deleted files archive (sorted by date):"
  ls -FC | sed -e 's/\(\.[[:digit:]][[:digit:]]\)\{5\}//g' | sed -e 's/^/  /'
  exit 0
fi

matches="$(ls -d "$1"* 2> /dev/null | wc -l)"

if [ $matches -eq 0 ]
then
  echo "No matches found for \"$1\" in archive directory, nothing to restore" >&2
  exit 1
fi

if [ $matches -gt 1 ]
then
  echo "More than one file or directory match in the archive:"
  index=1
  for name in $(ls -td "$1"* )
  do
    datetime="$(echo $name | awk -F. '{ print $6"/"$5" at "$4":"$3":"$2 }')"
    filename="$(echo $name | cut -d. -f1)"

    if [ -d $name ]
    then
      filecount="$(ls $name | wc -l | sed 's/[^[:digit:]]//g' )"
      echo "$index )  $filename (contents = ${filecount} items, deleted = $datetime)"
    else
      size="$(ls -sdk1 $name | awk '{print $1}')"
      echo "$index )  $filename (size = ${size}Kb, deleted = $datetime)"  
    fi
    index=$(( index + 1 ))
  done
  echo ""
  /bin/echo -n "Which version of $1 should be restored ('0' to quit)?: "
  read desired

  if [ ! -z "$(echo $desired | sed 's/[[:digit:]]//g')" ]
  then
    echo "$(basename $0): Restore canceled by user: invalid input." >&2
    exit 1
  fi

  if [ ${desired:=1} -ge $index ]
  then
    echo "$(basename $0): Restore canceled, index value too big" >&2
    exit 1
  fi

  if [ $desired -lt 1 ]
  then
    echo "$(basename $0): Restore canceled, invalid index value" >&2
    exit 1
  fi

  restore="$(ls -td1 "$1"* | sed -n "${desired}p")"
  
  if [ -e "$dest/$1" ]
  then
    echo "$(basename $0): \"$1\" File already exists in the current path. Cannot overwrite." >&2
    exit 1
  fi
  
  /bin/echo -n "Restoring file \"$1\" ..."
  $move $restore "$dest/$1"
  echo "done."

  /bin/echo -n "Delete the additional copies of this file? [y] "
  read answer

  if [ "${answer:=y}" == 'y' ]
  then
    $realrm -rf "$1"*
    echo "Deleted."  
  else
    echo "Additional copies retained."
  fi
else
  if [ -e "$dest/$1" ]
  then
    echo "$(basename $0): \"$1\" File already exists in the current path. Cannot overwrite." >&2
    exit 1
  fi
  
  restore="$(ls -d "$1"*)"

  /bin/echo -n "Restoring file \"$1\" ..."
  $move $restore "$dest/$1"
  echo "done."
fi

exit 0