99 lines
2.4 KiB
Go
99 lines
2.4 KiB
Go
package object
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import (
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"bytes"
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"crypto/sha256"
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"github.com/mr-tron/base58"
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"github.com/nspcc-dev/neofs-api-go/internal"
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"github.com/nspcc-dev/neofs-api-go/v2/refs"
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"github.com/pkg/errors"
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)
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// ID represents v2-compatible object identifier.
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type ID refs.ObjectID
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// ErrBadID should be returned when bytes slice hasn't sha256.Size
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// Notice: if byte slice changed, please, replace error message.
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const ErrBadID = internal.Error("object.ID should be 32 bytes length")
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// NewIDFromV2 wraps v2 ObjectID message to ID.
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func NewIDFromV2(idV2 *refs.ObjectID) *ID {
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return (*ID)(idV2)
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}
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// NewID creates and initializes blank ID.
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//
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// Works similar as NewIDFromV2(new(ObjectID)).
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func NewID() *ID {
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return NewIDFromV2(new(refs.ObjectID))
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}
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// SetSHA256 sets object identifier value to SHA256 checksum.
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func (id *ID) SetSHA256(v [sha256.Size]byte) {
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(*refs.ObjectID)(id).SetValue(v[:])
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}
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// Equal returns true if identifiers are identical.
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func (id *ID) Equal(id2 *ID) bool {
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return bytes.Equal(
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(*refs.ObjectID)(id).GetValue(),
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(*refs.ObjectID)(id2).GetValue(),
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)
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}
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// ToV2 converts ID to v2 ObjectID message.
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func (id *ID) ToV2() *refs.ObjectID {
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return (*refs.ObjectID)(id)
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}
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// Parse converts base58 string representation into ID.
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func (id *ID) Parse(s string) error {
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data, err := base58.Decode(s)
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if err != nil {
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return errors.Wrap(err, "could not parse object.ID from string")
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} else if len(data) != sha256.Size {
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return ErrBadID
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}
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(*refs.ObjectID)(id).SetValue(data)
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return nil
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}
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// String returns base58 string representation of ID.
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func (id *ID) String() string {
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return base58.Encode((*refs.ObjectID)(id).GetValue())
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}
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// Marshal marshals ID into a protobuf binary form.
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//
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// Buffer is allocated when the argument is empty.
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// Otherwise, the first buffer is used.
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func (id *ID) Marshal(b ...[]byte) ([]byte, error) {
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var buf []byte
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if len(b) > 0 {
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buf = b[0]
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}
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return (*refs.ObjectID)(id).
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StableMarshal(buf)
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}
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// Unmarshal unmarshals protobuf binary representation of ID.
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func (id *ID) Unmarshal(data []byte) error {
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return (*refs.ObjectID)(id).
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Unmarshal(data)
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}
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// MarshalJSON encodes ID to protobuf JSON format.
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func (id *ID) MarshalJSON() ([]byte, error) {
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return (*refs.ObjectID)(id).
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MarshalJSON()
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}
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// UnmarshalJSON decodes ID from protobuf JSON format.
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func (id *ID) UnmarshalJSON(data []byte) error {
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return (*refs.ObjectID)(id).
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UnmarshalJSON(data)
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}
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