package saltyim

import (
	"encoding/json"
	"io"
	"io/ioutil"

	"go.mills.io/salty"
)

// RegisterRequest is the request used by clients to register to a broker
type RegisterRequest struct {
	Addr Addr
	Key  string
}

// NewRegisterRequest reads the signed request body from a client, verifies its signature
// and returns the resulting `RegisterRequest` and key used to sign the request on success
// otherwise an empty object and en error on failure.
func NewRegisterRequest(r io.Reader) (req RegisterRequest, signer string, err error) {
	body, err := ioutil.ReadAll(r)
	if err != nil {
		return
	}
	out, key, err := salty.Verify(body)
	if err != nil {
		return
	}
	signer = key.ID().String()
	err = json.Unmarshal(out, &req)
	return
}