#!/bin/bash

method="$1"
script="$2"
domain="$3"
languages="de"
localedir="/usr/share/locale"

usage()
{
	echo "Usage: $0 [method] [shell script] {domain}"
	echo "Known methods:"
	echo "   --create-pot - creates pot file from script"
	echo "   --append-pot - appends current pot file with script"
	echo "   --generate   - generates pot and po files"
	echo "   --compile    - compiles mo files"
	echo
	echo "Examples:"
	echo "   $0 --generate example.sh"
	echo "   $0 --compile example.sh"
	echo
}

create_pot()
{
	local pot

	install -d locale
	pot="locale/${domain}.pot"
	bash --dump-po-strings "${script}" > "${pot}"
}

append_pot()
{
	local pot

	install -d locale
	pot="locale/${domain}.pot"
	bash --dump-po-strings "${script}" >> "${pot}"
}

generate_po()
{
	local lang
	local po
	local pot

	pot="locale/${domain}.pot"
	if [ ! -f "${pot}" ]
	then
		echo "Error: ${pot} missing - run --create-pot or --append-pot"
		exit 1	
	fi

	for lang in ${languages}
	do
		po="locale/${lang}/${domain}.po"
		if [ -f "${po}" ]
		then
			echo "Updating lang '${lang}'"
			msgmerge --quiet --no-fuzzy-matching --no-wrap --update "${po}" "${pot}"
		else
			echo "Processing lang '${lang}'"
			install -d locale/"${lang}"
			install -m0644 "${pot}" "${po}"
		fi
	done
}

generate_mo()
{
	local lang
	local dir
	local po

	for lang in ${languages}
	do
		echo "Compiling lang '${lang}'"
		po="locale/${lang}/${domain}.po"
		if [ ! -f "${po}" ]
		then
			echo "Error: ${po} missing - run --generate first"
			exit 1
		fi
		dir="${DESTDIR}/${localedir}/${lang}/LC_MESSAGES"
		install -d "${dir}"
		msgfmt -o "${dir}"/"${domain}".mo "${po}"
	done
}

if [[ -z ${script} ]]
then
	usage
	echo "Error: Script missing"
	exit 1
fi

if [[ -z ${domain} ]]
then
	domain="${script}"
fi

case ${method} in
	--create-pot) create_pot ;;
	--append-pot) append_pot ;;
	--generate) generate_po ;;
	--compile) generate_mo ;;
	*) usage ;;
esac