#!/usr/bin/env bash
# hledger-dc JOURNALFILE CMD [ARGS]
#  run a hledger command on a journal file which also supports Dr/Cr before the account name,
#  instead of/in addition to amount signs.

# If a posting begins with Dr<WHITESPACE>, remove that.
# If it begins with Cr<WHITESPACE> and contains no number, remove that.
# If it begins with Cr<WHITESPACE>, remove that and add a minus sign before the next number, and if that leaves a double minus, cancel those out.
dc2sign() { sed -E -e 's/^(\s+)Dr\s+/\1/i' -e 's/^(\s+)Cr\s+([^0-9]+)$/\1\2/i' -e 's/^(\s+)Cr\s+([^0-9]+)([0-9])/\1\2-\3/i' -e 's/--([0-9])/\1/'; }
# Or with a two space delimiter after Dr/Cr, allowing account names like "Dr Michael:checkup":
#dc2sign() { sed -E -e 's/^(\s+)Dr\s\s+/\1/i' -e 's/^(\s+)Cr\s\s+([^0-9]+)$/\1\2/i' -e 's/^(\s+)Cr\s\s+([^0-9]+)([0-9])/\1\2-\3/i' -e 's/--([0-9])/\1/'; }

dc2sign <"$1" | hledger -f- "${@:2}"


# Example:
#
# $ cat sample.journaldc 
# 2025-01-01 salary
#     Cr revenues            800 USD
#     Dr assets
#
# $ hledger -f sample.journaldc print
# 2025-01-01 salary
#     Cr revenues         800 USD
#     Dr assets
#
# $ hledger dc sample.journaldc print
# 2025-01-01 salary
#     revenues        -800 USD
#     assets

# Dev notes:
# This is syntactic sugar. 
# If useful, it should be possible to add this to journal format without too much breakage.
#
# Showing debits/credits separately in output, with a --dc flag, is more work.
# It could be prototyped as a single new report, eg an addon script providing variant of the simple balance report. 
# I think both the report calculation and display code would need to change, to sum and show the positive amounts and negative amounts separately.
# It would be a nice feature: offering a more traditional view of things, and reducing sign vs dc doubts.
# "In France, you have to use a debit and a credit column, and can't use the positive/negative notation."
# Would it provide any real new error checking power ? I'm not sure.
# See also https://github.com/simonmichael/hledger/issues/71.