################################################################################
# 8-bit colors
################################################################################

black='\u001b[30m'
red='\u001b[31m'
green='\u001b[32m'
yellow='\u001b[33m'
blue='\u001b[34m'
magenta='\u001b[35m'
cyan='\u001b[36m'
white='\u001b[37m'
bright_black='\u001b[30;1m'
bright_red='\u001b[31;1m'
bright_green='\u001b[32;1m'
bright_yellow='\u001b[33;1m'
bright_blue='\u001b[34;1m'
bright_magenta='\u001b[35;1m'
bright_cyan='\u001b[36;1m'
bright_white='\u001b[37;1m'


################################################################################
# Documentation and error messages
################################################################################

echo_info() {
  # Echos an informational message.
  #
  # depends_variable blue
  echo -e "${blue}[INFO]: $1"
}

echo_warn() {
  # Echos a warning message.
  #
  # depends_variable yellow
  echo -e "${yellow}[WARNING]: $1"
}

echo_error() {
  # Echos an error message.
  #
  # depends_variable red
  echo -e "${red}[ERROR]: $1"
}

unsupported_input() {
  # Generic error message. Consume herein to standardize the error messages.
  # Pass the supported inputs as $1.
  #
  # depends error_error
  echo_error "Unsupported input. This function only supports the following inputs: $1. Exiting..."
}

depends() {
  # Prints a message explaining a function's dependencies. Consume here to
  # standardize the error messages.
  # Pass the dependencies as $1.
  #
  # depends echo_info
  echo_info "This function depends on the following functions: $@"
}

depends_variable() {
  # Prints a message explaining a dependency on a variable. Consume here to
  # standardize the error messages.
  # Pass the dependencies as $1.
  #
  # depends echo_info
  echo_info "This function depends on the following variables: $@"
}

compliments() {
  # Prints a message explaining that a function compliments another function.
  # Think of complimentary functions as `zip` and `unzip`.
  #
  # depends echo_info
  echo_info "This function compliments the \`$1\` function."
}


################################################################################
# Filesystem operations
################################################################################

tar_dir() {
  # Tars dir as dir.tar. Removes dir.
  # compliments untar_dir
  tar -cf  "$1.tar" "$(basename $1)" && rm -rf "$1"
}

untar_dir() {
  # Untars dir.tar as dir. Removes dir.tar.
  # compliments tar_dir
  tar -xvf "$1" && rm "$1"
}

targz_dir() {
  # Tars a dir as dir.tar.gz.
  # compliments untargz_dir
  tar -czf "$1.tar.gz" "$(basename $1)"; rm -rf "$1"
}

untargz_dir() {
  # Untars dir.tar.gz as dir. Removes dir.tar.gz.
  # compliments targz_dir
  tar -xzvf "$1" && rm "$1"
}

zip_dir() {
  # Zips dir as dir.zip. Removes dir.
  # compliments unzip_dir
  zip -r "$1.zip" "$(basename $1)" && rm -rf "$1"
}

unzip_dir() {
  # Unzips dir.zip as dir. Removes dir.zip.
  # compliments zip_dir
  unzip "$1" && rm "$1"
}

archive() {
  # Generic function for archiving directories
  #
  # depends tar_dir targz_dir zip_dir
  # compliments unarchive
  printf "Which type of archive would you like to like create? (tar, tar.gz, zip) "
  case $(read -e) in
    tar)    tar_dir   "$1";;
    tar.gz) targz_dir "$1";;
    zip)    zip_dir   "$1";;
    *)      unsupported_input "tar, tar.gz, zip";;
  esac
}

unarchive() {
  # Generic way to unarchive files.
  # Currently supports the following extensions:
  # - .tar
  # - .tar.gz
  # - .zip
  #
  # depends untar unzip
  # compliments archive
  case $1 in
    *.tar.gz) untargz_dir "$1";;
    *.tar)    untar_dir   "$1";;
    *.zip)    unzip_dir   "$1";;
    *)        unsupported_input ".tar, .tar.zip, .zip"
  esac
}