#!/bin/bash

set -e

_help() {
    echo 'Usage:

    archive-extract2folder [--ask] [arch1] [arch2] ...
       Extracts archives (tar/tgz/tar.Z/zip/rar) to folder arch1/  creating an extra folder level

    archive-extract [--ask] [arch1] [arch2] ...
       Extracts archives (tar/tgz/tar.Z/zip/rar) to the current folder

    Arguments:
      --ask     Ask before extracting
'
    exit
}

ASK=0
[[ -z "$1" ]] && _help
for (( i=1; i<=$#; i++ )); do
    [[ ${!i} = "-h" ]] && _help
    [[ ${!i} = "--help" ]] && _help
    [[ ${!i} = "--ask" ]] && ASK=1
done
self=$( basename $0 )

for arch in "$@"; do
    if [[ ! -e "$arch" ]]; then
      continue
    fi
    case "$arch" in
        *.tar) D="`basename "$arch" .tar`"; U="tar -x -v -f"; ;;
        *.tar.gz) D="`basename "$arch" .tar.gz`"; U="tar -x -z -v -f"; ;;
        *.tgz)    D="`basename "$arch" .tgz`"; U="tar -x -z -v -f"; ;;
        *.tar.Z)  D="`basename "$arch" .tar.Z`"; U="tar -x -Z -v -f"; ;;
        *.tar.z)  D="`basename "$arch" .tar.z`"; U="tar -x -Z -v -f"; ;;
        *.tar.bz2) D="`basename "$arch" .tar.bz2`"; U="tar -x -j -v -f"; ;;
        *.zip) D="`basename "$arch" .zip`"; U="unzip"; ;;
        *.rar) D="`basename "$arch" .rar`"; U="unrar x"; ;;
        *)
            echo "Cannot extract file $arch"
        ;;
    esac
    archive=$( realpath "$arch" )
    if [[ "$self" = "archive-extract2folder" ]]; then
        out_folder="$PWD/$D/"
    fi
    if [[ "$self" = "archive-extract" ]]; then
        out_folder="$PWD/"
    fi

    if [[ "$ASK" == 1 ]]; then
        echo "extract $arch to $PWD/$D/?"
        read foo
    else
        echo "extracting $arch to $PWD/$D/"
    fi

    if [[ "$self" = "archive-extract2folder" ]]; then
        mkdir -p "$D"
        pushd "$D"
        $U "$archive"
        popd
    fi
    if [[ "$self" = "archive-extract" ]]; then
        $U "$archive"
    fi
done