todo.spell

#!/bin/sh
# Write/remove a task to do later.
#
# Select an existing entry to remove it from the file, or type a new entry to
# add it.

selector() {
    while [ "$#" -gt 0 ]; do
        case "$1" in
            -l) listsize="$2" ;;
            -p) prompt="$2" ;;
        esac
        shift
    done
    picker -i -p "$prompt" -l "$listsize"
}

error() {
    title=$1
    shift
    if [ -t 0 ]; then
        printf "Error: %s\n%s\n" "$title" "$*"
    else
        notify-send "Error: $title" "$*" -u critical -a todo
    fi
}

todo() {
    case "$LOGNAME" in
        work) f=-E ;;
        mendess) f=-Ev ;;
        *) f=-vF ;;
    esac
    LC_ALL=C sort "$file" | grep $f '^work'
}

pull() {
    o="$(rsync --update --timeout=5 mendess.xyz:todo "$CACHE" 2>&1)" || error "Download failed" "$o"
}

while [ "$#" -gt 0 ]; do
    case "$1" in
        gui) gui=1 ;;
        -l | --list) list=1 ;;
        -b | --bg-pull) bg_pull=1 ;;
    esac
    shift
done

CACHE="/tmp/$LOGNAME"
mkdir -p "$CACHE"
file="$CACHE/todo"
if [ "$bg_pull" ]; then
    pull &
    [ -e "$file" ] || exit
else
    pull
fi
[ -f "$file" ] || exit 1
touch "$file"
height=$(wc -l <"$file")
prompt="Add/delete a task: "

if [ "$list" ]; then
    if [ -t 0 ]; then
        todo
    else
        notify-send 'Todo list' "$(todo)" -a todo
    fi
else
    while :; do
        cmd=$(todo | selector -l "$height" -p "$prompt")
        [ "$cmd" ] || break
        [ "$LOGNAME" = work ] && echo "$cmd" | grep -qv '^work' && cmd="work: $cmd"
        if grep --quiet --line-regex --fixed-strings "$cmd" "$file"; then
            grep --line-regex --fixed-strings --invert-match "$cmd" "$file" >"$file.$$"
            mv "$file.$$" "$file"
            height=$((height - 1))
        else
            echo "$cmd" >>"$file"
            height=$((height + 1))
        fi
    done
    o="$(rsync --update --timeout=5 "$file" mendess.xyz: 2>&1)" || error "Upload failed" "$o"
fi