#!/bin/echo "This file can only be sourced, not run stand-alone." -- #!/bin/bash
# LACKADAISICAL SOURCE-ABLE FILE

# Source this in your RC file or manually to receive some of the simpler
# utilities, as well as aliases for `shrc` and `cdf`. Set env variable
# FROM_RC to 1 when sourcing this file to get RC-related functionality:
# FROM_RC=1 source <lackadaisical-root>/daisy.source

# This file is also sourced in some of the scripts included within
# lackadaisical for common functionality. Some of the shared functionality is
# only included if sourced from one of the included scripts, though you are
# free to bypass this by setting env variable DAISY_INTERNAL to 1.

[[ $DAISY_INTERNAL -eq 1 ]] && export DAISY_BIN=$(basename $0)

# Intro function
function daisy_help()
{
   OLD_IFS="$IFS"
   IFS=
   echo -e "==================================================================="
   echo -e ""
   echo -e "Thanks for installing LACKADAISICAL!"
   echo -e "This project aims to provide useful utilities as well as learning"
   echo -e "material."
   echo -e "It is still under heavy development, not all of the things on this"
   echo -e "list are present/implemented."
   echo -e ""
   echo -e "==================================================================="
   echo -e ""
   echo -e "This suite provides a number of functions, aliases and scripts."
   echo -e "They are all aimed at enhancing your efficiency."
   echo -e ""
   echo -e "==================================================================="
   echo -e ""
   echo -e "These are the included binaries:"
   echo -e " - calm:       Reduce a process niceness to 0."
   echo -e " - chroot-aio: A chroot wrapper that also takes care of binding"
   echo -e "               every required directory and has no options."
   echo -e " - cdz:        This utility extracts an archive to /tmp and changes"
   echo -e "               directory to it in a new shell instance. Upon exit,"
   echo -e "               the files are wiped."
   echo -e " - editx:      Uses your standard CLI editor to create/modify a"
   echo -e "               file and make it executable."
   echo -e " - filewait:   This tool is given a filename of a file that does"
   echo -e "               not exist yet. When the file appears on disk, the"
   echo -e "               program quits and simply returns the filename. This"
   echo -e "               can be used in personal workflows."
   echo -e " - newday:     A basic but powerful journaling system. Recommended"
   echo -e "               to set up via crontab. Can be used for everything"
   echo -e "               from diaries to BTRFS snapshots."
   echo -e " - own:        A simple utility. It effectively uses chown -R"
   echo -e "               user:user on its target. Root permissions required!"
   echo -e " - short:      This tool allows you to set up directory shortcuts."
   echo -e "               It enhances cd t to integrate itsef using its own"
   echo -e "               syntax. It is similar to wd."
   echo -e " - shrc:       This tool allows you to edit the RC file for your"
   echo -e "               shell in your preferred editor. After saving, the"
   echo -e "               file is sourced by your shell."
   echo -e " - sw:         A basic function that swaps two files by content."
   echo -e "               Useful for restoring backups."
   echo -e " - what:       This is a tool similar to which and others, the key"
   echo -e "               difference is that it returns partial matches. It can"
   echo -e "               be used to search for binaries."
   echo -e ""
   echo -e "==================================================================="
   echo -e ""
   echo -e "There are aliases and functions included within this file as well:"
   echo -e " - bak/unbak:  These small utilities make backups of files by making"
   echo -e "               a copy with a .bak suffix. Unbak reverses the process"
   echo -e "               using sw and removes the backup."
   echo -e " - lsa:        A simple alias for ls -lah."
   echo -e " - lsn:        A simple alias for ls -lah --sort=time --reverse."
   echo -e " - editbin:    An alias for editx $\(which <x>\). Saves on typing."
   echo -e " - ched:       Like chsh but for your editor (EDITOR env). A list"
   echo -e "               from which you can choose an installed editor"
   echo -e "               (CLI or GUI) is shown."
   echo -e " - cdf:        Use fzf to find a file and then cd to its location."
   echo -e " - ldrc:       Edits this file and source it, similarly to shrc."
   echo -e " - daisy_init: Alias for directly sourcing this file from any"
   echo -e "               LACKADAISICAL binary. You may use this yourself."
   echo -e " - daisy_cbin: Contains the name of the current LACKADAISICAL"
   echo -e "               binary being run."
   echo -e " - daisy_enc:  Converts a file/stdin to a base64 block that can be"
   echo -e "               decoded by passing the output(s) to daisy_dec."
   echo -e " - *_multi:    A version of daisy_enc that runs encodes multiple"
   echo -e "               files and outputs daisy_base64_data blocks to a file"
   echo -e "               or stdout."
   echo -e " - daisy_dec:  Converts daisy_base64_data blocks back to the form"
   echo -e "               it was in originally."
   echo -e " - *_multi:    A version of daisy_dec that runs on multiple input"
   echo -e "               blocks that are either stored in a file or stdin."
   echo -e ""
   echo -e "==================================================================="
   echo -e ""
   echo -e "To uninstall LACKADAISICAL, simply remove the source line from your"
   echo -e "shell RC, and reload it. This does not remove the files!"
   echo -e ""
   echo -e "To read this notice again, call the function 'daisy_help'."
   echo -e ""
   echo -e "==================================================================="

  IFS="$OLD_IFS"
}

# Variables for use in other utilities
# Find the right argument for our folder
ARG=$0
if [[ ! $ARG == *daisy.source* ]];
then
  ARG="${BASH_SOURCE[0]}"
fi

export DAISY_FOLDER=$(dirname $(realpath $ARG))
export DAISY_SOURCE_FILE=$(realpath $ARG)
export DAISY_AVAILABLE=0

# Config folder setup
export DAISY_CONFIG_FOLDER="$HOME/.config/lackadaisical"
NEW_INSTALL=0

if [[ ! -d "$DAISY_CONFIG_FOLDER" ]];
then
  # Create the folder with its basics
  mkdir -p "$DAISY_CONFIG_FOLDER"
  echo "export EDITOR=$EDITOR" > "$DAISY_CONFIG_FOLDER/editor.src"
  daisy_help
  NEW_INSTALL=1
fi

# Installation into PATH
if [[ ! $PATH == *"$DAISY_FOLDER"* ]];
then
  export PATH="$PATH:$DAISY_FOLDER"
  [[ NEW_INSTALL -eq 1 ]] && echo -e "Lackadaisical binaries have been added to your PATH variable."
fi

# Load override from config (default is $EDITOR - so no change is made)
_EDITOR=$(cat "$DAISY_CONFIG_FOLDER"/editor.src | grep "EDITOR=" | sed 's/export EDITOR=//g')

NEED_CHED=0
if [[ -z $EDITOR ]];
then
  NEED_CHED=1
fi

# Never call if we're in internal mode
if [[ $DAISY_INTERNAL -eq 1 ]];
then
  NEED_CHED=0
fi

# Set up the basic alias for `shrc`
# Do not set these up if DAISY_INTERNAL=1 is set, or infinite recursion could
# occur!
if [[ ! -v DAISY_INTERNAL ]];
then
  alias shrc=". shrc"
fi

###############################################################################
# FUNCTIONS and ALIASES #######################################################
###############################################################################

# bak and unbak
function bak()
{
  # Input: <file>
  target=$1

  # Check if file exists
  if ! test -f "$target";
  then
    echo "Path not found: \"$target\""
    return 2
  fi

  # Handle both cases
  if [[ UNBAK_MODE -eq 1 ]];
  then
    cp -R "$target.bak" "$target"
    rm -rf "$target.bak"
    echo "Restored backup: $target <-- $target.bak"
  else
    cp -R "$target" "$target.bak"
    echo "Backup made: $target --> $target.bak"
  fi
}

alias unbak="UNBAK_MODE=1 bak"
alias lsa="ls -lah"
alias lsn="ls -lah --sort=time --reverse"

# Simple version of `cdf`
function cdf()
{
  cd $(dirname $(fzf))
}

# for convenience purposes
function editbin()
{
  editx $(which $1)
}

# sets a new editor based on commony available ones, and some visual ones
function ched()
{
  editors=("nano" "vim" "nvim" "vi" "emacs" "gedit" "kate" "mousepad" "micro" \
           "code" "subl" "joe" "kwrite" "gnome-text-editor")

  # Find which editors are installed
  available_editors=()
  for editor in "${editors[@]}";
  do
    EDITOR_REAL=$(which $editor)
    if command -v "$EDITOR_REAL" >/dev/null 2>&1;
    then
      if [[ $(realpath "$EDITOR") == "$EDITOR_REAL" ]];
      then
	available_editors+=("$editor (current choice)" "$EDITOR_REAL")
      else
        available_editors+=("$editor" "$EDITOR_REAL")
      fi
    fi
  done

  if [[ ! -z $@ ]];
  then
    TEXT="$@"
    dialog --msgbox "$TEXT" 0 0
  fi

  # Present all choices
  CHOICE=$(dialog --clear --title "Select Text Editor (Recommendation: nano)" \
                  --menu "Choose one of the installed text editors:" 15 50 6 \
                  "${available_editors[@]}" 3>&1 1>&2 2>&3)
  DIALOG_RET=$?

  if [ $DIALOG_RET -ne 0 ];
  then
    echo "No editor selected."
    return
  fi

  CHOICE=$(which $CHOICE)
  echo export EDITOR=$CHOICE > "$DAISY_CONFIG_FOLDER/editor.src"
  echo export DAISY_OLD_EDITOR=$EDITOR >> "$DAISY_CONFIG_FOLDER/editor.src"

  # Seems silly but this is also where we should export these
  source "$DAISY_CONFIG_FOLDER/editor.src"
}

function wait_for_editor()
{
  pname="$1"
  fname="$2"

  # Give some time for a process to launch
  sleep 1

  while true;
  do
    ALIVE=$(ps aux | grep $fname | grep $pname)
    if [[ $ALIVE == "" ]]
    then
      break
    fi
    sleep 1
  done
}

function ldrc()
{
  FROM_RC=0 $EDITOR "$DAISY_SOURCE_FILE"
  wait_for_editor $EDITOR "$DAISY_SOURCE_FILE"
  source "$DAISY_SOURCE_FILE"
}

function daisy_enc()
{
  has_file=$([[ ! -z $1 ]] && file $1 1>/dev/null; echo $?)
  has_file=$([[ has_file -eq 0 ]] && echo 1)
  file_info="no data"
  file_name="null"
  if [[ has_file -eq 1 ]];
  then
    file_info=$(file $1)
    file_name=$(basename $1)
  fi

  base64_inner=$(cat ${1:-/dev/stdin} | base64 | tr -d '\n')

  # Print out our block
  echo -e "# File info: $file_info"
  echo -e "daisy_data_base64_$file_name=\"$base64_inner\""
}

# Will only take input files, always outputs to stdout
function daisy_enc_multi()
{
  [[ ! -d $1 ]] && echo "daisy_dec_multi: No input files specified" && return
  for file in "$@"; do
    if [[ -f "$file" ]]; then
      daisy_enc "$file"
      echo    # separate blocks with a newline
    else
      echo "daisy_enc_multi: Skipping non-file: $file"
    fi
  done
}

function daisy_dec()
{
  data=$(cat ${1:-/dev/stdin} | grep -v "#" )
  echo -e "$data" | cut -d "=" -f 2 | cut -b 2- | head -c -1 | base64 -d
}

# Will only take a file and directory, sources it to find all encoded data
# Extracts to the directory
function daisy_dec_multi()
{
  [[ ! -f $1 ]] && echo "daisy_dec_multi: No input file specified" && return
  [[ ! -d $2 ]] && echo "daisy_dec_multi: No output directory specified" && return
  declare -a vars=( $(cat $1 | grep -v "# File") )
  for enc in "${vars[@]}";
  do
    file=$(echo -e "$enc" | cut -d "_" -f 4- | cut -d "=" -f 1)

    if [[ ! "$file" == '' ]]
    then
      daisy_dec <(echo "$enc") | tee  "$2"/"$file"
    fi
  done
}

alias daisy_init='source "$DAISY_SOURCE_FILE"'

###############################################################################
# end of FUNCTIONS and ALIASES ################################################
###############################################################################
if [[ $NEED_CHED -eq 1 ]];
then
  # Editor is unset, pick one, set `vi` as backup
  TXT1="There is no standard EDITOR environment variable defined. Choose one of the installed text editors."
  TXT2="You can always change it later wih `ched`, part of the Lackadaisical suite."
  ched $TXT1 $TXT2
fi

# End of user section!
export DAISY_AVAILABLE=1

# Start of internal section

# Check for dependencies
function daisy_dependency_check()
{
  command -v $1 1>/dev/null 2>/dev/null;
  res=$?
  echo $(($res ^ 1))
}

DAISY_HAS_fzf=$(daisy_dependency_check fzf)
DAISY_HAS_md5sum=$(daisy_dependency_check md5sum)

function daisy_quit_if_no()
{
  has_dep=$DAISY_HAS_$1

  # Check first if we have checked for this dependency, if not, print a fixme!
  # TODO: Remove upon release, or convert into self-modifying code.
  if [[ ! -v DAISY_HAS_$1 ]];
  then
    echo "FIXME: Dependency `$1` should have an env variable, checking ad-hoc"
    has_dep=$(daisy_dependency_check $1)
  fi

  if [[ $has_dep -eq 0 ]];
  then
    echo "$DAISY_BIN: The dependency $1 was not found! Please install it" \
         "to be able to use this utility!"
    exit 1
  fi
}

[ -d "$DAISY_FOLDER" ] && export DAISY_AVAILABLE=1

# Source everything in the config folder
# We do this at the end so that we do not run into isues
for file in "$DAISY_CONFIG_FOLDER"/*; do
    [ -f "$file" ] && source "$file"
done