# opkbuild
# lib/locale
# Locale functions.
#
# Copyright (C) 2012 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/>.

[ -n "${_OB_LOCALE_SM}" ] && return 0
_OB_LOCALE_SM='true'

_OB_DEFAULT_LOCALE='en_US'

ob_set_locale()
{
	_obsl_locale=
	_obsl_domain=

	if [ ${#} -eq 1 ]; then
		_obsl_locale=
		_obsl_domain="${1}"
	elif [ ${#} -eq 2 ]; then
		_obsl_locale="${1}"
		_obsl_domain="${2}"
	else
		unset _obsl_locale _obsl_domain
		return 125
	fi

	# Detect the system locale.
	# The test command's -z option doesn't work here?
	if [ ${#_obsl_locale} -eq 0 ]; then
		if [ -n "${LC_ALL}" ]; then
			_obsl_locale="${LC_ALL}"
		elif [ -n "${LC_MESSAGES}" ]; then
			_obsl_locale="${LC_MESSAGES}"
		elif [ -n "${LANG}" ]; then
			_obsl_locale="${LANG}"
		else
			_obsl_locale="${_OB_DEFAULT_LOCALE}"
		fi
	fi

	# Try to load the locale.
	if ! _ob_try_load_locale "${_locale%.*}" "${obsl_domain}"; then
		if ! _ob_try_load_locale "${_locale%_*}" "${_obsl_domain}"; then
			if ! _ob_try_load_locale "${_OB_DEFAULT_LOCALE}" \
					"${_obsl_domain}"; then
				printf 'Error: cannot load locale file\n'
				unset _obsl_locale _obsl_domain
				return 1
			fi
		fi
	fi

	unset _obsl_locale _obsl_domain
	return 0
}

_ob_try_load_locale()
{
	_obtll_locale="${1}"
	_obtll_domain="${2}"
	_obtll_ms="@@LOCALEDIR@@/${_obtll_locale}/LC_MESSAGES/${_obtll_domain}.ms"

	if [ -f "${_obtll_ms}" ]; then
		. "${_obtll_ms}"
	else
		unset _obtll_locale _obtll_domain _obtll_ms
		return 1
	fi

	unset _obtll_locale _obtll_domain _obtll_ms
	return 0
}