#!/bin/bash
dir=~/
dir="$dir/Documents/Journal"

#Cleanup function run on exit and disowned so as not to tie up the shell with Shred for five minutes
cleanup() {
    #Check if encrypted file is present before proceeding to avoid errors
    if [ -f "$dir"/journal.gpg ]
    then
        shred -u "$dir"/journal/titled/*
        rmdir "$dir"/journal/titled
        shred -u "$dir"/journal/dated/*
        rmdir "$dir"/journal/dated
        rmdir "$dir"/journal
    fi
}

#Check that 1) encrypted file is present and 2) unencrypted directory is not
if [ ! -f "$dir"/journal.gpg ] || [ -d "$dir"/journal ]
then
    echo Error. Clean up the directory before proceeding
    exit
fi

gpg --decrypt --no-symkey-cache "$dir"/journal.gpg | tar xz -C "$dir"

if [ ! -d "$dir"/journal ]
then
    echo Wrong password
    exit
fi

#If an argument was given, use it for a file title in journal/titled. Otherwise, filename is date in journal/dated
if [ "$1" != "" ]
then
    FILE="$dir/journal/titled/$1"
else
    FILE="$dir/journal/dated/$(date +'%a-%b-%d-%Y')"
fi
clear
date
echo
#If file does not exist, write date to file. Otherwise, skip this and append
if [ ! -f "$FILE" ]
then
    echo $(date +'%a-%b-%d-%Y') > "$FILE"
fi

echo >> "$FILE"
echo $(date +'%H:%M') >> "$FILE"
echo >> "$FILE"

#Append stdout to file. CTRL+D when done
cat >> "$FILE"
clear

echo >> "$FILE"
echo >> "$FILE"

cd "$dir"

#Confirm journal directory is present before overwriting encrypted file
if [ -d "$dir"/journal ]
then
    rm journal.gpg
    tar -czf - journal | gpg --output "$dir"/journal.gpg --symmetric --no-symkey-cache
fi

cd -
clear
cp "$dir"/journal.gpg "$dir"/.backup.gpg
#Create a backup of the latest journal.gpg, start cleanup script and disown
cleanup &
disown cleanup