#!/bin/sh
#
# Copyright (C) 2012  Etersoft
# Copyright (C) 2012  Vitaly Lipatov <lav@etersoft.ru>
#
# This file 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, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
#

load_helper epm-packages

# TODO: combine with -qa (the difference only in return status now)

_query_via_packages_list()
{
	local res=0
	local firstpkg=$1
	shift
	epm_packages | grep "$firstpkg-" || res=1
	for pkg in "$@" ; do
		epm_packages 2>/dev/null | grep "$pkg-" || res=1
	done
	return $res
}

__epm_query_file()
{
	local CMD

	[ -z "$@" ] && return

	case $PMTYPE in
		apt-rpm|yum-rpm|urpm-rpm|zypper-rpm)
			CMD="rpm -qp"
			;;
		apt-dpkg)
			CMD="dpkg-deb --show"
			# TODO: make rpm-like output
			#showcmd dpkg -l $pkg_filenames
			#dpkg -l $pkg_filenames | grep "^ii"
			#return
			;;
		*)
			fatal "Do not know command for query file package"
			;;
	esac

	docmd $CMD $@
}

__epm_query_name()
{
	local CMD

	[ -z "$@" ] && return

	case $PMTYPE in
		apt-rpm|yum-rpm|urpm-rpm|zypper-rpm)
			CMD="rpm -q"
			;;
		apt-dpkg)
			CMD="dpkg -l"
			# TODO: make rpm-like output
			#showcmd dpkg -l $pkg_filenames
			#dpkg -l $pkg_filenames | grep "^ii"
			#return
			;;
		npackd)
			CMD="npackdcl path --package=$@"
			;;
		*)
			_query_via_packages_list $@
			return
			;;
	esac

	docmd $CMD $@
}

# check if pkg is installed
is_installed()
{
	pkg_filenames="$@" epm_query >/dev/null
}

epm_query()
{
	[ -n "$pkg_filenames" ] || fatal "Run query without names"

	__epm_query_file $pkg_files || return

	__epm_query_name $pkg_names || return
}