frostfs-api-go/pkg/container/container.go
Pavel Karpy f92f9cd424 [#302] pkg/container: Document default values set in New
Make `nil` as a default value for attributes.
Document field values of instance constructed
via `New`. Assert the values in corresponding
unit test.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>
2021-06-09 17:23:35 +03:00

231 lines
5 KiB
Go

package container
import (
"crypto/sha256"
"github.com/google/uuid"
"github.com/nspcc-dev/neofs-api-go/pkg"
cid "github.com/nspcc-dev/neofs-api-go/pkg/container/id"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-api-go/pkg/owner"
"github.com/nspcc-dev/neofs-api-go/pkg/session"
"github.com/nspcc-dev/neofs-api-go/v2/container"
)
type Container struct {
v2 container.Container
token *session.Token
sig *pkg.Signature
}
// New creates, initializes and returns blank Container instance.
//
// Defaults:
// - token: nil;
// - sig: nil;
// - basicACL: acl.PrivateBasicRule;
// - version: nil;
// - nonce: random UUID;
// - attr: nil;
// - policy: nil;
// - ownerID: nil.
func New(opts ...NewOption) *Container {
cnrOptions := defaultContainerOptions()
for i := range opts {
opts[i].apply(&cnrOptions)
}
cnr := new(Container)
cnr.SetNonceUUID(cnrOptions.nonce)
cnr.SetBasicACL(cnrOptions.acl)
if cnrOptions.owner != nil {
cnr.SetOwnerID(cnrOptions.owner)
}
if cnrOptions.policy != nil {
cnr.SetPlacementPolicy(cnrOptions.policy)
}
cnr.SetAttributes(cnrOptions.attributes)
return cnr
}
// ToV2 returns the v2 Container message.
//
// Nil Container converts to nil.
func (c *Container) ToV2() *container.Container {
if c == nil {
return nil
}
return &c.v2
}
// NewVerifiedFromV2 constructs Container from NeoFS API V2 Container message.
//
// Does not perform if message meets NeoFS API V2 specification. To do this
// use NewVerifiedFromV2 constructor.
func NewContainerFromV2(c *container.Container) *Container {
cnr := new(Container)
if c != nil {
cnr.v2 = *c
}
return cnr
}
// CalculateID calculates container identifier
// based on its structure.
func CalculateID(c *Container) *cid.ID {
data, err := c.ToV2().StableMarshal(nil)
if err != nil {
panic(err)
}
id := cid.New()
id.SetSHA256(sha256.Sum256(data))
return id
}
func (c *Container) Version() *pkg.Version {
return pkg.NewVersionFromV2(c.v2.GetVersion())
}
func (c *Container) SetVersion(v *pkg.Version) {
c.v2.SetVersion(v.ToV2())
}
func (c *Container) OwnerID() *owner.ID {
return owner.NewIDFromV2(c.v2.GetOwnerID())
}
func (c *Container) SetOwnerID(v *owner.ID) {
c.v2.SetOwnerID(v.ToV2())
}
// Nonce returns container nonce in a binary format.
//
// Returns nil if container nonce is not a valid UUID.
//
// Deprecated: use NonceUUID instead.
func (c *Container) Nonce() []byte {
uid, err := c.NonceUUID()
if err == nil {
data, _ := uid.MarshalBinary()
return data
}
return nil
}
// SetNonce sets container nonce in a binary format.
//
// If slice length is less than UUID size, than
// value is padded with a sequence of zeros.
// If slice length is more than UUID size, than
// value is cut.
//
// Deprecated: use SetNonceUUID instead.
func (c *Container) SetNonce(v []byte) {
u := uuid.UUID{}
copy(u[:], v)
c.v2.SetNonce(u[:])
}
// Returns container nonce in UUID format.
//
// Returns error if container nonce is not a valid UUID.
func (c *Container) NonceUUID() (uuid.UUID, error) {
return uuid.FromBytes(c.v2.GetNonce())
}
// SetNonceUUID sets container nonce as UUID.
func (c *Container) SetNonceUUID(v uuid.UUID) {
data, _ := v.MarshalBinary()
c.v2.SetNonce(data)
}
func (c *Container) BasicACL() uint32 {
return c.v2.GetBasicACL()
}
func (c *Container) SetBasicACL(v uint32) {
c.v2.SetBasicACL(v)
}
func (c *Container) Attributes() Attributes {
return NewAttributesFromV2(c.v2.GetAttributes())
}
func (c *Container) SetAttributes(v Attributes) {
c.v2.SetAttributes(v.ToV2())
}
func (c *Container) PlacementPolicy() *netmap.PlacementPolicy {
return netmap.NewPlacementPolicyFromV2(c.v2.GetPlacementPolicy())
}
func (c *Container) SetPlacementPolicy(v *netmap.PlacementPolicy) {
c.v2.SetPlacementPolicy(v.ToV2())
}
// SessionToken returns token of the session within
// which container was created.
func (c Container) SessionToken() *session.Token {
return c.token
}
// SetSessionToken sets token of the session within
// which container was created.
func (c *Container) SetSessionToken(t *session.Token) {
c.token = t
}
// Signature returns signature of the marshaled container.
func (c Container) Signature() *pkg.Signature {
return c.sig
}
// SetSignature sets signature of the marshaled container.
func (c *Container) SetSignature(sig *pkg.Signature) {
c.sig = sig
}
// Marshal marshals Container into a protobuf binary form.
//
// Buffer is allocated when the argument is empty.
// Otherwise, the first buffer is used.
func (c *Container) Marshal(b ...[]byte) ([]byte, error) {
var buf []byte
if len(b) > 0 {
buf = b[0]
}
return c.v2.
StableMarshal(buf)
}
// Unmarshal unmarshals protobuf binary representation of Container.
func (c *Container) Unmarshal(data []byte) error {
return c.v2.
Unmarshal(data)
}
// MarshalJSON encodes Container to protobuf JSON format.
func (c *Container) MarshalJSON() ([]byte, error) {
return c.v2.
MarshalJSON()
}
// UnmarshalJSON decodes Container from protobuf JSON format.
func (c *Container) UnmarshalJSON(data []byte) error {
return c.v2.
UnmarshalJSON(data)
}