#!/bin/bash
# Programmable bash completion for oclHashcat
# this script was tested under ubuntu, please verify if on your
# distro /etc/bash_completion.d/ exists (otherwise it won't work)

COMPGENSCRIPT=/etc/bash_completion
COMPGENFOLDER=${COMPGENSCRIPT}.d
COMPGENTARGET=${COMPGENFOLDER}/oclHashcat.sh
BASHRC=~/.bashrc
ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

#############################################################################

is_sourced ()
{
  if [[ "${BASH_SOURCE[0]}" != "${0}" ]]; then

    SOURCED=0

  else

    SOURCED=1

  fi

  return ${SOURCED}
}

source_completion ()
{
  # load the completion into current shell

  if [ "${is_child}" -eq 1 ]; then

    if [ "${parent_sourced}" -eq 0 ]; then

      return 1

    fi

  fi

  if [ "${was_sourced}" -eq 0 ]; then

    source "${COMPGENTARGET}"
    # or
    #source ${BASHRC}

    return 1

  fi

  return 0
}

my_exit ()
{
  if [ "${was_sourced}" -eq 0 ]; then

    return $1

  else

    exit $1

  fi
}

is_root ()
{
  if [ "$(id -g)" -eq 0 ]; then

    return 0

  else

    return 1

  fi
}


#############################################################################

is_sourced
was_sourced=${?}

ROOT_PARENT="$(cd ${ROOT}/.. && pwd)"

# Check (install) permissions

parent_sourced=0
is_child=0

if ! is_root; then

  echo "Warning: root permissions are required to install the tab completion script into the protected '${COMPGENFOLDER}' folder"

  sudo ${BASH_SOURCE[0]} ${was_sourced}

  ret=${?}

  if [ "${ret}" -eq 0 ]; then

    source_completion

  fi

  my_exit ${ret}
  return ${?}

fi

if [ -n "${1}"  ]
then

  parent_sourced=${1}
  is_child=1

fi

if [ -f "${COMPGENFOLDER}" ]
then

  echo "The bash completion script file (${COMPGENSCRIPT}) could not be found"
  echo "Please make sure that the distro 'bash-completion' package is installed (apt-get install it otherwise). EXIT"
  my_exit 1
  return ${?}

fi

if [ -d "${COMPGENFOLDER}" ]; then

  # remove the old version of oclHashcat64.sh (was renamed to just oclHashcat.sh)

  rm -f "${COMPGENTARGET}"/oclHashcat64.sh

  # copy the script to target folder

  cp ${ROOT}/oclHashcat.sh "${COMPGENTARGET}"

  # adjust paths to the main binaries of oclHashcat

  sed -ri "s!^(ROOT=).*!\1\"${ROOT_PARENT}\"!" "${COMPGENTARGET}"


  # add the compgen to bashrc if not already there

  if ! egrep -q "^[^#]*\. *${COMPGENSCRIPT}" "${BASHRC}"; then

    cat >> "${BASHRC}" << EOF

if [ -f "${COMPGENSCRIPT}" ]; then

  . ${COMPGENSCRIPT}

fi

EOF

  fi

  if source_completion; then

    echo "Bash completion scripts for oclHashcat were successfully installed, but since you didn't 'source' this file, you need to run:"
    echo "source ${COMPGENTARGET} # or source ${BASHRC}"
    echo
    echo "in order to be able to use the tab completion within the current shell."

  fi

else

  echo "The compgen script folder (${COMPGENFOLDER}) could NOT be found. EXIT"
  my_exit 1
  return ${?}

fi

my_exit 0
return ${?}
