# 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/>.

cmds=' '

register_cmd()
{
	local cmd="${1}"
	shift 1

	cmds="${cmds}${cmd} "
	return 0
}

print_opt_summaries()
{
	local padding=
	local opt=
	local opt_out=
	local summary=

	padding="$(printf '%24s' '')"
	for opt in $(printf '%s' "${OPTSTRING}" | sed 's/\([a-zA-Z0-9]\)/ \1/g')
	do
		if [ ${#opt} -eq 1 ]; then
			# No argument expected.
			opt_out="-${opt}"
		else
			# Argument expected.
			opt="${opt%?}"
			opt_out="-${opt} $(get_msg "opt_${opt}_arg")"
		fi
		if [ ${#opt_out} -gt 20 ]; then
			printf '  %s\n%24s' "${opt_out}" ''
		else
			printf '  %-20s  ' "${opt_out}"
		fi
		summary="$(get_msg "opt_${opt}_summary")"
		printf '%s\n' "${summary}" | fold -s -w 56 | \
			sed "2,\$s/^/${padding}/;"
	done
}

print_cmd_summaries()
{
	local padding=
	local cmd=
	local cmd_clean=
	local summary=

	padding="$(printf '%24s' '')"
	for cmd in ${cmds}; do
		if [ ${#cmd} -gt 20 ]; then
			printf '  %s\n%24s' "${cmd}" ''
		else
			printf '  %-20s  ' "${cmd}"
		fi
		cmd_clean="$(printf '%s' "${cmd}" | \
			tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
		summary="$(get_msg "cmd_${cmd_clean}_summary")"
		printf '%s\n' "${summary}" | fold -s -w 56 | \
			sed "2,\$s/^/${padding}/;"
	done
}

print_cmd_usage()
{
	local cmd="${1}"
	local cmd_clean=
	local usage=

	cmd_clean="$(printf '%s' "${cmd}" | \
		tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
	usage="$(get_msg "cmd_${cmd_clean}_usage")"

	printf "$(get_msg 'cmd_usage')\n" "${0}" "${cmd}" "${usage}"
}

is_cmd()
{
	local cmd="${1}"

	case "${cmds}" in *" ${cmd} "*) return 0;; esac
	return 1
}

run_cmd()
{
	local cmd="${1}"
	local cmd_clean=
	shift

	cmd_clean="$(printf '%s' "${cmd}" | \
		tr '[A-Z]' '[a-z]' | tr -C '[a-z0-9_]' '_')"
	if is_cmd "${cmd}"; then
		"cmd_${cmd_clean}_main" "${@}"
	else
		error 1 "$(get_msg 'cmd_not_found')" "${cmd}"
	fi
}