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# CLI user interface
#
# Copyright (C) 2015 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/>.
cli_tty=''
cli_init_ui()
{
cli_tty="$(tty)"
}
cli_exit_ui()
{
: Nothing to do.
}
cli_resume_ui()
{
: Nothing to do.
}
cli_dbg()
{
local fmt="${1}"
shift 1
printf "Debug: ${fmt}\n" "${@}" >"${cli_tty}"
}
cli_info()
{
local fmt="${1}"
shift 1
printf "${fmt}\n" "${@}" >"${cli_tty}"
}
cli_warn()
{
local fmt="${1}"
shift 1
printf "Warning: ${fmt}\n" "${@}" >"${cli_tty}"
}
cli_err()
{
local fmt="${1}"
shift 1
printf "Error: ${fmt}\n" "${@}" >"${cli_tty}"
}
cli_show_menu()
{
local title="${1}"
shift 1
local i=
local l=
local label=
printf '%s\n' "${title}" >"${cli_tty}"
{ printf '%s\n' "${title}" | sed 's/./-/g'; } >"${cli_tty}"
while :; do
printf '\n' >"${cli_tty}"
i=0
l=${#}
for label in "${@}"; do
i=$(($i + 1))
printf ' %4d: %s\n' "${i}" "${label}" >"${cli_tty}"
done
printf '\n> ' >"${cli_tty}"
if ! read -r i <"${cli_tty}"; then
continue
fi
case "${i}" in
*[!0-9]* | '')
continue
;;
esac
if [ ${i} -le 0 ] || [ ${i} -gt ${l} ]; then
continue
fi
printf '\n' >"${cli_tty}"
i=$(($i - 1))
printf '%d' "${i}"
return 0
done
}
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