cli_show_menu(): New function

1 files changed, 37 insertions, 0 deletions

diff --git a/src/ui/cli.sh b/src/ui/cli.sh
index a396625..a8af8dd 100644
--- a/src/ui/cli.sh
+++ b/src/ui/cli.sh
@@ -46,3 +46,40 @@ cli_err()
 
 	printf "Error: ${fmt}\n" "${@}" >&2
 }
+
+cli_show_menu()
+{
+	local title="${1}"
+	shift 1
+	local i=
+	local l=
+	local label=
+
+	printf '%s\n' "${title}" >"$(tty)"
+	{ printf '%s\n' "${title}" | sed 's/./-/g'; } >"$(tty)"
+
+	while :; do
+		printf '\n' >"$(tty)"
+		i=0
+		l=${#}
+		for label in "${@}"; do
+			i=$(($i + 1))
+			printf '  %4d: %s\n' "${i}" "${label}" >"$(tty)"
+		done
+		printf '\n> ' >"$(tty)"
+		if ! read -r i <"$(tty)"; then
+			continue
+		fi
+		case "${i}" in
+			*[!0-9]* | '')
+				continue
+				;;
+		esac
+		if [ ${i} -le 0 ] || [ ${i} -gt ${l} ]; then
+			continue
+		fi
+		i=$(($i - 1))
+		printf '%d' "${i}"
+		return 0
+	done
+}