#!/bin/sh
# This script is intended to be run via cron.

# It creates a folder structure in home for the current date in the following format:
# $HOME/ByDate/<Year>/<Month>/<Day>

# It also sets up a symlink in home: $HOME/Today
# This symlink will always point to the folder for the current date.

# Finally, it removes any folders without data, to prevent clutter.

# - Why did you make this?
# I remember things better when they have a date attached to them.
# You can use this for a primitive form of note-taking, but aside from notes -
# you can store any data this way.

BINSELF=$(basename $0)
DIR_NAME=ByDate
ROOT_DIR=$HOME/$DIR_NAME
TODAY_SYM=$HOME/Today

# Present day
TODAY=$(date -I)
YEAR=$(echo $TODAY | awk -F"-" '{print $1}')
MONTH=$(echo $TODAY | awk -F"-" '{print $2}')
DAY=$(echo $TODAY | awk -F"-" '{print $3}')

set -e

function errorFn()
{
  ERROR=$?
  if [[ $ERROR -gt 0 ]];
  then
    echo "$BINSELF error ($ERROR): "
    perl -E 'say $!=shift' $ERROR
  fi
	exit $ERROR
}

# Error handling
trap errorFn ERR

# First we clear out empty folders, and remove the symlink if it exists
test -e "$ROOT_DIR" &&	find "$ROOT_DIR" -maxdepth 3 -type d -empty -print | xargs rm -rf
test -L "$TODAY_SYM" && rm -rf "$TODAY_SYM"

# Now we can set up today's directory
mkdir -p "$ROOT_DIR/$YEAR/$MONTH/$DAY"
cd $ROOT_DIR
ln -s "./$DIR_NAME/$YEAR/$MONTH/$DAY" "$TODAY_SYM"