frostfs-api-go/refs/address.go
2020-03-31 10:05:26 +03:00

68 lines
1.7 KiB
Go

package refs
import (
"crypto/sha256"
"strings"
"github.com/nspcc-dev/neofs-api-go/internal"
)
const (
joinSeparator = "/"
// ErrWrongAddress is raised when wrong address is passed to Address.Parse ParseAddress.
ErrWrongAddress = internal.Error("wrong address")
// ErrEmptyAddress is raised when empty address is passed to Address.Parse ParseAddress.
ErrEmptyAddress = internal.Error("empty address")
)
// ParseAddress parses address from string representation into new Address.
func ParseAddress(str string) (*Address, error) {
var addr Address
return &addr, addr.Parse(str)
}
// Parse parses address from string representation into current Address.
func (m *Address) Parse(addr string) error {
if m == nil {
return ErrEmptyAddress
}
items := strings.Split(addr, joinSeparator)
if len(items) != 2 {
return ErrWrongAddress
}
if err := m.CID.Parse(items[0]); err != nil {
return err
} else if err := m.ObjectID.Parse(items[1]); err != nil {
return err
}
return nil
}
// String returns string representation of Address.
func (m Address) String() string {
return strings.Join([]string{m.CID.String(), m.ObjectID.String()}, joinSeparator)
}
// IsFull checks that ContainerID and ObjectID is not empty.
func (m Address) IsFull() bool {
return !m.CID.Empty() && !m.ObjectID.Empty()
}
// Equal checks that current Address is equal to passed Address.
func (m Address) Equal(a2 *Address) bool {
return m.CID.Equal(a2.CID) && m.ObjectID.Equal(a2.ObjectID)
}
// Hash returns []byte that used as a key for storage bucket.
func (m Address) Hash() ([]byte, error) {
if !m.IsFull() {
return nil, ErrEmptyAddress
}
h := sha256.Sum256(append(m.ObjectID.Bytes(), m.CID.Bytes()...))
return h[:], nil
}