# opkbuild
# lib/metadata.sh
# Functions for parsing and validating package metadata.
#
# 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 2 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"${_OB_METADATA_SM+set}" = x'set' ] && return 0
_OB_METADATA_SM=1

ob_use 'metadata/@@METADATA@@'

ob_validate_source_name()
{
	local name=

	if [ ${#} -eq 1 ]; then
		name="${1}"
	else
		return 125
	fi

	_ob_metadata_do 'validate_source_name' "${name}"

	return ${?}
}

ob_validate_binary_name()
{
	local name=

	if [ ${#} -eq 1 ]; then
		name="${1}"
	else
		return 125
	fi

	_ob_metadata_do 'validate_binary_name' "${name}"

	return ${?}
}

ob_parse_version()
{
	local opt=
	local upstreamver_var=
	local distrev_var=
	local version=

	while getopts 'u:d:' opt; do
		case "${opt}" in
			u)
				upstreamver_var="${OPTARG}"
				if ! _ob_validate_var_name "${upstreamver_var}"; then
					return 125
				fi
				;;
			d)
				distrev_var="${OPTARG}"
				if ! _ob_validate_var_name "${distrev_var}"; then
					return 125
				fi
				;;
			?)
				return 125
				;;
		esac
	done
	shift $(($OPTIND - 1))

	if [ ${#} -eq 1 ]; then
		version="${1}"
	else
		return 125
	fi

	if ! _ob_metadata_do 'validate_version' "${version}"; then
		return 1
	fi

	if [ -n "${upstreamver_var}" ]; then
		eval ${upstreamver_var}="$(_ob_metadata_do 'get_upstreamver' \
			"${version}")"
	fi
	if [ -n "${distrev_var}" ]; then
		eval ${distrev_var}="$(_ob_metadata_do 'get_distrev' \
			"${version}")"
	fi

	return 0
}

ob_get_system_arch()
{
	if [ ${#} -gt 0 ]; then
		return 125
	fi

	_ob_metadata_do 'get_system_arch'

	return ${?}
}

ob_get_system_plat()
{
	if [ ${#} -gt 0 ]; then
		return 125
	fi

	_ob_metadata_do 'get_system_plat'

	return ${?}
}

ob_match_arch()
{
	local arch=
	local arch_field=
	local a=
	local a_ere=

	if [ ${#} -eq 2 ]; then
		arch="${1}"
		arch_field="${2}"
	else
		return 125
	fi

	for a in ${arch_field}; do

		# "all" == "all"
		if [ "${arch}" = 'all' ]; then
			if [ "${a}" = 'all' ]; then
				return 0
			else
				continue
			fi
		fi

		# "foo-bar-baz" == "any"
		if [ "${a}" = 'any' ]; then
			return 0
		fi

		# Generate an ERE to match hyphenated architectures.
		a_ere="$(echo "${a}" | \
			sed 's/^any-/[^-]+-/;s/-any-/-[^-]+-/g;s/-any$/-[^-]+/g')"

		# "foo-bar-baz" == "foo-any-any"
		if echo "${arch}" | grep -E "${a_ere}" >/dev/null 2>&1; then
			return 0
		fi

	done

	# Nothing matched.
	return 1
}

ob_match_plat()
{
	local plat=
	local plat_field=
	local p=

	if [ ${#} -eq 2 ]; then
		plat="${1}"
		plat_field="${2}"
	else
		return 125
	fi

	for p in ${plat_field}; do
		if [ "${plat}" = 'all' ]; then
			if [ "${p}" = 'all' ]; then
				return 0
			else
				continue
			fi
		fi
		if [ "${p}" = 'any' ]; then
			return 0
		fi
	done

	return 1
}

ob_arch_is_concerned()
{
	local host_arch=
	local arches=
	local arch=
	local not_arch=
	local seen_arch=

	if [ ${#} -eq 2 ]; then
		host_arch="${1}"
		arches="${2}"
	else
		return 125
	fi

	seen_arch=1
	if [ -z "${arches}" ]; then
		seen_arch=0
	fi

	for arch in ${arches}; do
		not_arch="${arch#!}"
		if [ "${not_arch}" != "${arch}" ]; then
			if ob_match_arch "${host_arch}" "${not_arch}"; then
				seen_arch=1
				break
			else
				seen_arch=0
			fi
		elif ob_match_arch "${host_arch}" "${arch}"; then
			seen_arch=0
			break
		fi
	done

	return ${seen_arch}
}

ob_plat_is_concerned()
{
	local host_plat=
	local plats=
	local plat=
	local not_plat=
	local seen_plat=

	if [ ${#} -eq 2 ]; then
		host_plat="${1}"
		plats="${2}"
	else
		return 125
	fi

	seen_plat=1
	if [ -z "${plats}" ]; then
		seen_plat=0
	fi

	for plat in ${plats}; do
		not_plat="${plat#!}"
		if [ "${not_plat}" != "${plat}" ]; then
			if ob_match_plat "${host_plat}" "${not_plat}"; then
				seen_plat=1
				break
			else
				seen_plat=0
			fi
		elif ob_match_plat "${host_plat}" "${plat}"; then
			seen_plat=0
			break
		fi
	done

	return ${seen_plat}
}

ob_get_system_path()
{
	local path_id=

	if [ ${#} -ge 1 ]; then
		path_id="${1}"
		shift 1
	else
		return 125
	fi

	_ob_metadata_do 'get_system_path' "${path_id}" "${@}"

	return ${?}
}

_ob_metadata_do()
{
	local func=

	func="${1}"
	shift 1

	"_ob_${func}_@@METADATA@@" "${@}"

	return ${?}
}