#!/usr/bin/env bash

SAVEIFS=$IFS
IFS="$(printf '\n\t')"

function extract {
  if [ $# -eq 0 ]; then
    # display usage if no parameters given
    echo "Usage: extract <path/file_name>.<zip|rar|bz2|gz|tar|tbz2|tgz|Z|7z|xz|ex|tar.bz2|tar.gz|tar.xz|.zlib|.cso>"
    echo "       extract <path/file_name_1.ext> [path/file_name_2.ext] [path/file_name_3.ext]"
  fi
  for n in "$@"; do
    if [ ! -f "$n" ]; then
      echo "'$n' - file doesn't exist"
      return 1
    fi

    case "''${n%,}" in
    *.cbt | *.tar.bz2 | *.tar.gz | *.tar.xz | *.tbz2 | *.tgz | *.txz | *.tar)
      tar zxvf "$n"
      ;;
    *.lzma) unlzma ./"$n" ;;
    *.bz2) bunzip2 ./"$n" ;;
    *.cbr | *.rar) unrar x -ad ./"$n" ;;
    *.gz) gunzip ./"$n" ;;
    *.cbz | *.epub | *.zip) unzip ./"$n" ;;
    *.z) uncompress ./"$n" ;;
    *.7z | *.apk | *.arj | *.cab | *.cb7 | *.chm | *.deb | *.iso | *.lzh | *.msi | *.pkg | *.rpm | *.udf | *.wim | *.xar | *.vhd)
      7z x ./"$n"
      ;;
    *.xz) unxz ./"$n" ;;
    *.exe) cabextract ./"$n" ;;
    *.cpio) cpio -id <./"$n" ;;
    *.cba | *.ace) unace x ./"$n" ;;
    *.zpaq) zpaq x ./"$n" ;;
    *.arc) arc e ./"$n" ;;
    *.cso) ciso 0 ./"$n" ./"$n.iso" &&
      extract "$n.iso" && \rm -f "$n" ;;
    *.zlib) zlib-flate -uncompress <./"$n" >./"$n.tmp" &&
      mv ./"$n.tmp" ./"''${n%.*zlib}" && rm -f "$n" ;;
    *.dmg)
      hdiutil mount ./"$n" -mountpoint "./$n.mounted"
      ;;
    *)
      echo "extract: '$n' - unknown archive method"
      return 1
      ;;
    esac
  done
}

IFS=$SAVEIFS