#!/bin/bash

# memos
# written 2020 by konomo
# all rights reversed; copy what you like; community over copyright


# define memo array
memos=("")

# define memo name array
memonames=("")

# get the arguments
args=("$@")

# memo directory
memodir=$HOME/.memos

# define the length at which a line is wrapped
wraplength=32

readmemos() {
    # check for empty memo directory
    if [ -z "$(ls -A ${memodir}/)" ]; then
        echo -e "there are no memos.\ncreate one by passing the 'new' argument\n-~-~-MEMOS-~-~-"
        exit 0
    fi
    for m in $memodir/*
    do
        # wish i could just use memos+= to be honest, but
        # for some reason i can't.
        memos[${#memos[@]}]=$(cat $m)
        memonames[${#memonames[@]}]=$(echo "${m}" | tr -d '\n')
    done
}

printmemos() {
    count=0
    for i in "${memos[@]}"
    do
        echo -n "${i}" | fold -w "${wraplength}"
        if [ -n "${memonames[${count}]}" ]; then
            echo -e " -> ${memonames[${count}]}"
        fi
        ((count++))
    done
}

newmemo() {
    echo "please enter the filename (will write to ${memodir})"
    read memopath
    if [ -f "${memodir}/${memopath}" ]; then
        echo "this memo already exists"
        newmemo
    fi
    
    # create file
    touch "${memodir}/${memopath}"
    
    echo -e "\nplease enter the memo now (will be single lined, but wrapped at ${wraplength} characters)\nbe sure to choose a fitting filename"
    read memoline
    
    # write to file without newline
    echo -n "${memoline}" > "${memodir}/${memopath}"

    # memos are private!
    chmod 400 "${memodir}/${memopath}"
    exit
}

rmmemo() {
    if [ -z "$(ls -A ${memodir}/)" ]; then
        echo -e "there are no memos.\ncreate one by passing the 'new' argument"
        exit 0
    fi

    echo "you can remove these memos:"
    ls $memodir
    read memochoose
    if [ -f "${memodir}/${memochoose}" ]; then
        rm -i "${memodir}/${memochoose}"
    fi
    exit
}

case ${args[0]} in
new)
    newmemo
;;
remove | rm)
    rmmemo
;;
*)
    echo -e "-~-~-MEMOS-~-~-"
    readmemos
    printmemos
    echo "-~-~-MEMOS-~-~-"
    ;;
esac