#
# Copyright (c) 2008 by Bruce Blinn
#
# File: GetYesNo.sh
#

GetYesNo() {
	#
	# NAME
	#	GetYesNo - ask a "yes" or "no" question
	#
	# SYNOPSIS
	#	GetYesNo message
	#
	# DESCRIPTION
	#	This function will prompt the user with the message
	#	and wait for the user to answer "yes" or "no".
	#	This function will return true (0) if the user
	#	answers yes; otherwise, it will return false (1).
	#
	#	This function will accept y, yes, n, or no, and it
	#	is reasonably tolerant of upper and lower case
	#	letters; any other answer will cause the question
	#	to be repeated.
	#
	_ANSWER=

	if [ $# -eq 0 ]; then
		echo "Usage: GetYesNo message" 1>&2
		exit 1
	fi

	while :
	do
		if [ "$(echo -n)" = "-n" ]; then
			echo "$@\c"
		else
			echo -n "$@"
		fi
		read _ANSWER
		case "$_ANSWER" in
			[yY] | yes | YES | Yes ) return 0	;;
			[nN] | no  | NO  | No  ) return 1	;;
			* ) echo "Please enter y or n."		;;
		esac
	done
}