#!/bin/bash

# unrm--Searches the deleted files archive for the specified file or
# diredctory. If there is m,ore than one matching result, it shows a list
# of results ordered by timestampe and lets the user specify which one
# to restore.

archivedir="$HOME/.recycle-bin"
realrm="$(which rm)"
move="$which mv"

dest=$(pwd)

if [ ! -d $archivedir ] ; then
    echo "$0: No deleted files directory: nothing to unrm" >&2
    exit 1
fi

cd $archivedir

# If given no arguments, just show a listing of the delted files.
if [ $# -eq 0 ] ; then
    echo "Contents of your delted files archive (sorted by date):"
    ls -FC | sed -e 's/\([[:digit:]][[:digit:]]\.\)\{5\}//g' \
        -e 's/^/ /'
    exit 0
fi

# Otherwise, we must have a user-specified pattern to work with.
# Let's see if the pattern matches more than one file or directory
# in the archive.

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

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 | cut -c1-14) \
            awk -F. '{ print "$5"/"$4" at "$3":"$2":"$1" }')"
                    filename="$(echo $name | cut -c16-)"
                    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 $1 should I restore ('O' to quit)? [1] : "
    read desired
    if [ ! -z "$(echo $desired | sed 's/[[:digit:]]//g')" ] ; then
        echo "$0: Restore canceled by user: invalid input." >&2
        exit 1
    fi

    if [ ${desired:=1} -ge $index ] ; then
        echo "$0: Restore canceled by user: index value too big." >&2
    fi

    if [ $desired -lt 1] ; then
        echo "$0: Restore canceled by user." >&2
        exit 1
    fi

    restore="$(ls -td1 *"$1" | sed -n "${desired}p")"

    if [ -e "$dest/$1" ] ; then
        echo "\"$1\" already exists in this directory. 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] "
    if [ ${answer:=y} = "y" ] ; then 
        $realrm -rf *"$1"
        echo "Deleted."
    else
        echo "Additional copies retained."
    fi
else
    if [ -e "$dest/$1" ] ; then
        echo "\"$1\" already exists in this directory. 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