# ProteanOS Development Kit
# lib/locale.sh
# Locale functions
#
# Copyright (C) 2012, 2013  Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

[ "x${_LOCALE_SM+set}" = 'xset' ] && return 0
_LOCALE_SM=1

LOCALEDIR='@localedir@'
LOCALE_PATH='%s/%s/LC_MESSAGES/%s.ms:%s/%s/%s.ms'
DEFAULT_LOCALE='en_US'
TEXT_DOMAIN='@textdomain@'

load_locale()
{
	local localedir=
	local localepath=

	# Make sure LC_MESSAGES is set.
	if [ "x${LC_MESSAGES+set}" != 'xset' ]; then
		if [ "x${LC_ALL+set}" = 'xset' ]; then
			LC_MESSAGES="${LC_ALL}"
		elif [ "x${LANG+set}" = 'xset' ]; then
			LC_MESSAGES="${LANG}"
		else
			LC_MESSAGES="${DEFAULT_LOCALE}"
		fi
	fi

	localedir="${LOCALEDIR}"
	localepath="${LOCALE_PATH}"

	# Try to load the locale.
	if ! _try_load_locale "${localedir}" "${localepath}" \
			"${LC_MESSAGES%.*}"; then
		if ! _try_load_locale "${localedir}" "${localepath}" \
				"${LC_MESSAGES%_*}"; then
			if ! _try_load_locale "${localedir}" "${localepath}" \
					"${DEFAULT_LOCALE}"; then
				warn 'Cannot load locale'
				return 1
			fi
		fi
	fi

	return 0
}

get_msg()
{
	local msgid="${1}"

	eval "printf '%s' \"\${msg_${TEXT_DOMAIN}_${msgid}}\""

	return 0
}

_try_load_locale()
{
	local localedir="${1}"
	local localepath="${2}"
	local locale="${3}"
	local path=
	local ms=

	IFS=':'
	for path in ${localepath}; do
		unset IFS
		ms="$(printf "${path}" \
			"${localedir}" "${locale}" "${TEXT_DOMAIN}")"
		if [ -f "${ms}" ]; then
			. "${ms}"
			return 0
		fi
	done
	unset IFS

	return 1
}