err() {
	echo $1
	echo "exiting.."
	exit 1
}

input_old() {
	local input
	local found="0"
	echo "$1 $2"
	read input
	for i in $2; do
		if [ "$i" == "$input" ]; then
			found=1
		fi
	done
	if [ "$found" == "0" ]; then
		err "$input: $3"
		return 1
	fi
	output="$input"
}

header() {
	clear
	echo "#### $1"
}

addpkg() {
	for i in $@; do
		pkgs+=( "$i" )
	done
}

enable_service() {
	ln -s /etc/sv/$1 /etc/runit/runsvdir/default/
}

reset() {
	if [ "$1" == "packages" ]; then
		function packages() { :; }
	fi
}

input() {
        output=""
        echo "${1}"
        read -r -p "[${2}]: " output
        test -z "${output}" && output="${2}"
        return 0
}

#multiplechoice "networksystem" "dhcpcd" "networkmanager" "iwd" "none"

multiplechoice() {
        output=""
        local done=""
        local input=("${@}")
        #for i in $(seq 1 "$(( ${#input[@]} - 1 ))"); do
        for i in $(seq 0 "$(( ${#input[@]} - 1 ))"); do
                if [[ "${i}" == "0" ]]; then
                        choices="${input[$i]}"
                        use="${input[$i]}"
                else
                        choices="${choices}|${input[$i]}"
                        use+=" ${input[$i]}"
                fi
        done
        while input "[${choices}]: " "${input[0]}"; do
                for i in $(seq 0 "${#input[@]}"); do
                        if [[ "${output}" == "${input[$i]}" ]] || [[ "${output}" == "${input[$i]:0:2}" ]]; then
                                output="${input[$i]}"
                                done=1
                        fi
                done
                if [[ -z "${done}" ]]; then
                        echo wronginput "${output}"
                        echo use these: "${use}"
                else
                        break
                fi

        done
}

yesno() {
        local input=""
        local retval=""
        local default=""
        local q=""
        case "${2}" in
                Y|y) q="${1} [Y|n]:"; default=y;;
                N|n) q="${1} [y|N]:"; default=n;;
        esac
        while read -r -p "${q} " input; do
                test -z "${input}" && input="${default}"
                case "${input}" in
                        y*|Y*|*es*|*ES*|*Es*|*eS*|1)
                                retval=1
                                break
                                ;;
                        n*|N*|0)
                                retval=""
                                break
                                ;;
                        *) wronginput "${input}" "${choices[*]}"
                                ;;
                esac
        done
        if [[ -z "${retval}" ]]; then
                return 1
        else
                return 0
        fi
}