package hook

import (
	"encoding/base64"

	"tunnel/pkg/netstring"
	"tunnel/pkg/server/queue"
)

var b64Enc = base64.RawStdEncoding

type b64Pipe struct{}

func (b64Pipe) Send(rq, wq queue.Q) error {
	e := netstring.NewEncoder(wq.Writer())

	for b := range rq {
		e.Encode(b64Enc.EncodeToString(b))
	}

	return nil
}

func (b64Pipe) Recv(rq, wq queue.Q) error {
	d := netstring.NewDecoder(rq.Reader())

	for {
		s, err := d.Decode()
		if err != nil {
			return err
		}

		if b, err := b64Enc.DecodeString(s); err != nil {
			return err
		} else {
			wq <- b
		}
	}
}

func init() {
	registerPipe("b64", "base64 filter out/in", b64Pipe{})
}