#!/bin/bash
# SPDX-FileCopyrightText: 2023 Brian Woods
# SPDX-License-Identifier: GPL-2.0-or-later

# ------------------------------------------------------------------
# an exiftool rating updater
#	This tool reads in xmp files from darktable and updates the
#	orginal NEF file with the xmp file's rating.  This is so when
#	exporting darktable pictures into lightroom, the rating is
#	imported into lightroom
# ------------------------------------------------------------------

VERSION=0.1.0
USAGE="Usage: `basename "$0"` -bh <NEF file(s)>\n"
USAGE+="\t-b => backup orginals\n"
USAGE+="\t-r => remove xmp after updating\n"
USAGE+="\t-h => help"


BACKUP="-overwrite_original"
REMOVE=false

if [ $# == 0 ] ; then
	echo -e $USAGE
	exit 1;
fi

while getopts ":rbh" optname ; do
	case "$optname" in
	"v")
		echo "Version $VERSION"
		exit 0;
		;;
	"b")
		BACKUP=
		;;
	"r")
		REMOVE=true
		;;
	"h")
		echo -e $USAGE
		exit 0;
		;;
	"?")
		echo "Unknown option $OPTARG"
		exit 0;
		;;
	":")
		echo "No argument value for option $OPTARG"
		exit 0;
		;;
	*)
		echo "Unknown error while processing options"
		exit 0;
		;;
	esac
done

shift $(($OPTIND - 1))

for NEFFILE in "$@" ; do
	if [  ! -f ${NEFFILE} ] ; then
		echo "${NEFFILE} doesn't exist, skipping"
		continue;
	fi

	XMPFILE="${NEFFILE}.xmp"
	if [  ! -f ${XMPFILE} ] ; then
		echo "${XMPFILE} doesn't exist, skipping"
		continue;
	fi

	exiftool ${BACKUP} -tagsFromFile ${XMPFILE} -Rating ${NEFFILE}
	RV=$?

	if (($RV > 0)) ; then
		echo "Updating rating from ${XMPFILE} to ${NEFFILE} failed"
		continue
	fi

	if [ "${REMOVE}" = true ] ; then
		rm ${XMPFILE}
	fi
done