notes-todos

#!/usr/bin/env bash

set -euo pipefail
IFS=$'\n\t'

__usage="
Usage: notes todos [--help | -h | -?] [--all | --done] [--export | -e] [<folder>...]

\`notes todos\` lists all todos from your notes

Options:
    -h, -?, --help      Output usage
    --all, -a           List both done and not done todos
    --done, -d          List only done todos

Arguments:
    <folder>            If passed space-separated folders inside your \$NOTES_PATH, will search for todos only in those recursively

\$NOTES_PATH defaults to ~/notes.

By default \`notes todos\` will list only not done todos.
You can filter by using ``--all\` for all todos or \`--done\` for only done todos.
"

FOLDERS=()
MODE_NOT_DONE=0x1
MODE_DONE=0x10
MODE_ALL=0x11
MODE=$MODE_NOT_DONE
OUTPUT=/dev/stdout
NOTES_PATH=${NOTES_PATH:-$HOME/notes}

while (( "$#" )); do
    case "$1" in
        -h|-'?'|--help)
            echo "$__usage"
            exit 0
            ;;
        --all|-a)
            MODE=$MODE_ALL
            shift
            ;;
        --done|-d)
            MODE=$MODE_DONE
            shift
            ;;
        --*=|-*) # unsupported options
            echo "Error: Unsupported option \"$1\"" >&2
            echo "$__usage" >&2
            exit 1
            ;;
        *) # preserve positional arguments
            FOLDERS+=( "$1" )
            shift
            ;;
    esac
done

# set positional arguments in their proper place
set -- "${FOLDERS[@]}"

# Use regex pattern depending on todo filters
checked=""
(( (MODE & MODE_DONE)     != 0 )) && checked="x$checked"
(( (MODE & MODE_NOT_DONE) != 0 )) && checked=" $checked"
pattern="\s*-\s*\[[$checked]\]\s*.*"

# Determine note sources based on folders
notes_sources=("${FOLDERS[@]/#/$NOTES_PATH\/}")

matching_files=$(grep --recursive --files-with-matches --extended-regexp --regexp="$pattern" --exclude="_*" --exclude-dir="_*" --exclude=".*" --exclude-dir=".*" "${notes_sources[@]-$NOTES_PATH}")

for filename in $matching_files; do
    {
        echo "${filename#$NOTES_PATH/}:"
        echo
        grep --extended-regexp "$pattern" "$filename"
        echo
    } >> "$OUTPUT"
done