# pro-archman
# lib/cmd.sh
# Command-related functions
#
# Copyright (C) 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${_CMD_SM+set}" = 'xset' ] && return 0
_CMD_SM=1

cmds=

load_cmds()
{
	local cmd

	for cmd in ${PKGLIBCMD}; do
		cmd="${cmd##*/}"
		cmd="${cmd%.sm}"
		cmds="${cmds}${cmd}${LF}"
		use "cmd/${cmd}"
	done
}

cmd_summary()
{
	if [ "x${loading_cmd}" = 'x' ]; then
		return 125
	fi

	eval "cmd_${loading_cmd}_summary='${1}'"
}

cmd_usage()
{
	if [ "x${loading_cmd}" = 'x' ]; then
		return 125
	fi

	eval "cmd_${loading_cmd}_usage='${1}'"
}

print_cmd_summaries()
{
	local padding cmd summary

	padding="$(printf '%24s' '')"
	for cmd in ${PKGLIBCMD}; do
		cmd="${cmd##*/}"
		cmd="${cmd%.sm}"
		if [ ${#cmd} -gt 20 ]; then
			printf '  %s\n%24s' "${cmd}" ''
		else
			printf '  %-20s  ' "${cmd}"
		fi
		summary="$(eval printf \'%s\' \"\$\{cmd_"${cmd}"_summary\}\")"
		printf '%s\n' "${summary}" | fold -s -w 56 | \
			sed "2,\$s/^/${padding}/;"
	done
}

print_cmd_usage()
{
	local cmd usage

	cmd="${1}"

	usage="$(eval printf \'%s\' \"\$\{cmd_"${cmd}"_usage\}\")"

	printf 'Usage: %s %s %s\n' "${0}" "${cmd}" "${usage}"
}

is_cmd()
{
	local cmd

	cmd="${1}"

	[ "x$(printf '%s' "${cmds}" | grep "^${cmd}$")" = "x${cmd}" ]
}

run_cmd()
{
	local cmd

	cmd="${1}"
	shift

	if is_cmd "${cmd}"; then
		"cmd_${cmd}_main" "${@}"
	else
		printf 'Command "%s" not found\n' "${cmd}"
	fi
}