#!/usr/bin/env bash
# hledger-timedothm TIMEDOTHMFILE CMD [ARGS]
#  run a hledger command on a timedot file which also supports H:M syntax,
#  and report all time amounts in H:M format.

# convert H:M to decimal numbers
hm2dec() { perl -pe 's#(\d+):(\d{2})#sprintf("%.2f", $1 + ($2 / 60))#ge'; }

# convert decimal numbers to H:M
dec2hm() { perl -pe 's/(\d+\.\d+)/sprintf("%d:%02d", int($1), ($1 - int($1)) * 60 + 0.5)/ge'; }

hm2dec <"$1" | hledger -f timedot:- "${@:2}" | dec2hm


# Example:
#
# $ cat sample.timedothm
# 2025-09-27
# time  ..
# time  0.5
# time  30m
# time  0:30  ; new H:M syntax
#
# $ hledger timedothm sample.timedothm reg -w80
# 2025-09-27                      (time)                        0:30          0:30
#                                 (time)                        0:30          1:00
#                                 (time)                        0:30          1:30
#                                 (time)                        0:30          2:00

# Dev notes:
# If useful, there's no reason we couldn't
# 1. add H:M syntax to timedot format
# 2. add a general --hm output flag, affecting display of amounts with
# no commodity,
# or a commodity that looks like a time unit (eg timedot's: s, m, h, d, w, mo, y),
# or a commodity that has a display:time tag.