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package backupformat
import (
"errors"
"fmt"
"io"
"github.com/hamba/avro/v2/ocf"
"google.golang.org/protobuf/proto"
v1 "github.com/authzed/authzed-go/proto/authzed/api/v1"
)
func NewEncoderForExisting(w io.Writer) (*Encoder, error) {
avroSchema, err := avroSchemaV1()
if err != nil {
return nil, fmt.Errorf("unable to create avro schema: %w", err)
}
enc, err := ocf.NewEncoder(avroSchema, w, ocf.WithCodec(ocf.Snappy))
if err != nil {
return nil, fmt.Errorf("unable to create encoder: %w", err)
}
return &Encoder{enc}, nil
}
func NewEncoder(w io.Writer, schema string, token *v1.ZedToken) (*Encoder, error) {
avroSchema, err := avroSchemaV1()
if err != nil {
return nil, fmt.Errorf("unable to create avro schema: %w", err)
}
if token == nil {
return nil, errors.New("missing expected token")
}
md := map[string][]byte{
metadataKeyZT: []byte(token.Token),
}
enc, err := ocf.NewEncoder(avroSchema, w, ocf.WithCodec(ocf.Snappy), ocf.WithMetadata(md))
if err != nil {
return nil, fmt.Errorf("unable to create encoder: %w", err)
}
if err := enc.Encode(SchemaV1{
SchemaText: schema,
}); err != nil {
return nil, fmt.Errorf("unable to encode SpiceDB schema object: %w", err)
}
return &Encoder{enc}, nil
}
type Encoder struct {
enc *ocf.Encoder
}
func (e *Encoder) Append(rel *v1.Relationship) error {
var toEncode RelationshipV1
toEncode.ObjectType = rel.Resource.ObjectType
toEncode.ObjectID = rel.Resource.ObjectId
toEncode.Relation = rel.Relation
toEncode.SubjectObjectType = rel.Subject.Object.ObjectType
toEncode.SubjectObjectID = rel.Subject.Object.ObjectId
toEncode.SubjectRelation = rel.Subject.OptionalRelation
if rel.OptionalCaveat != nil {
contextBytes, err := proto.Marshal(rel.OptionalCaveat.Context)
if err != nil {
return fmt.Errorf("error marshaling caveat context: %w", err)
}
toEncode.CaveatName = rel.OptionalCaveat.CaveatName
toEncode.CaveatContext = contextBytes
}
if err := e.enc.Encode(toEncode); err != nil {
return fmt.Errorf("unable to encode relationship: %w", err)
}
return nil
}
func (e *Encoder) Close() error {
if err := e.enc.Flush(); err != nil {
return fmt.Errorf("unable to flush encoder: %w", err)
}
return nil
}
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