package git

import (
	"os"

	"github.com/ProtonMail/go-crypto/openpgp"
	"github.com/ProtonMail/go-crypto/openpgp/armor"
)

type SignKey struct {
	KeyFile string

	entity *openpgp.Entity
}

func (s *SignKey) ReadKeyFile() error {
	file, err := os.Open(s.KeyFile)
	if err != nil {
		return err
	}
	defer file.Close()

	block, err := armor.Decode(file)
	if err != nil {
		return err
	}

	entityList, err := openpgp.ReadKeyRing(block.Body)
	if err != nil || len(entityList) < 1 {
		return err
	}

	s.entity = entityList[0]
	return nil
}