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types.go
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types.go
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package schema
import (
"errors"
"fmt"
"github.com/ipld/go-ipld-prime"
"github.com/ipld/go-ipld-prime/node/bindnode"
)
type (
DBMetaInfo struct {
Version int64
Format string
}
IndexMetaInfo struct {
Version int64
}
CollectionMetaInfo struct {
Version int64
PrimaryKey []string
}
)
func BuildDBMetaInfoNode(version int64, format string) (ipld.Node, error) {
dbMetaInfo := &DBMetaInfo{
Version: version,
Format: format,
}
return dbMetaInfo.ToNode()
}
func (dmi DBMetaInfo) ToNode() (n ipld.Node, err error) {
// TODO: remove the panic recovery once IPLD bindnode is stabilized.
defer func() {
if r := recover(); r != nil {
err = toError(r)
}
}()
n = bindnode.Wrap(&dmi, DBMetaInfoPrototype.Type()).Representation()
return
}
func UnwrapDBMetaInfo(node ipld.Node) (*DBMetaInfo, error) {
if node.Prototype() != DBMetaInfoPrototype {
dmiBuilder := DBMetaInfoPrototype.NewBuilder()
err := dmiBuilder.AssignNode(node)
if err != nil {
return nil, fmt.Errorf("faild to convert node prototype: %w", err)
}
node = dmiBuilder.Build()
}
dmi, ok := bindnode.Unwrap(node).(*DBMetaInfo)
if !ok || dmi == nil {
return nil, fmt.Errorf("unwrapped node does not match schema.DBMetaInfo")
}
return dmi, nil
}
func BuildIndexMetaInfoNode(version int64) (ipld.Node, error) {
indexMetaInfo := &IndexMetaInfo{Version: version}
return indexMetaInfo.ToNode()
}
func (imi IndexMetaInfo) ToNode() (n ipld.Node, err error) {
// TODO: remove the panic recovery once IPLD bindnode is stabilized.
defer func() {
if r := recover(); r != nil {
err = toError(r)
}
}()
n = bindnode.Wrap(&imi, IndexMetaInfoPrototype.Type()).Representation()
return
}
func UnwrapIndexMetaInfo(node ipld.Node) (*IndexMetaInfo, error) {
if node.Prototype() != IndexMetaInfoPrototype {
imiBuilder := IndexMetaInfoPrototype.NewBuilder()
err := imiBuilder.AssignNode(node)
if err != nil {
return nil, fmt.Errorf("faild to convert node prototype: %w", err)
}
node = imiBuilder.Build()
}
imi, ok := bindnode.Unwrap(node).(*IndexMetaInfo)
if !ok || imi == nil {
return nil, fmt.Errorf("unwrapped node does not match schema.IndexMetaInfo")
}
return imi, nil
}
func BuildCollectionMetaInfoNode(version int64, primaryKey []string) (ipld.Node, error) {
collectionMetaInfo := &CollectionMetaInfo{
Version: version,
PrimaryKey: primaryKey,
}
return collectionMetaInfo.ToNode()
}
func (cmi CollectionMetaInfo) ToNode() (n ipld.Node, err error) {
// TODO: remove the panic recovery once IPLD bindnode is stabilized.
defer func() {
if r := recover(); r != nil {
err = toError(r)
}
}()
n = bindnode.Wrap(&cmi, CollectionMetaInfoPrototype.Type()).Representation()
return
}
func UnwrapCollectionMetaInfo(node ipld.Node) (*CollectionMetaInfo, error) {
if node.Prototype() != CollectionMetaInfoPrototype {
cmiBuilder := CollectionMetaInfoPrototype.NewBuilder()
err := cmiBuilder.AssignNode(node)
if err != nil {
return nil, fmt.Errorf("faild to convert node prototype: %w", err)
}
node = cmiBuilder.Build()
}
cmi, ok := bindnode.Unwrap(node).(*CollectionMetaInfo)
if !ok || cmi == nil {
return nil, fmt.Errorf("unwrapped node does not match schema.CollectionMetaInfo")
}
return cmi, nil
}
func toError(r interface{}) error {
switch x := r.(type) {
case string:
return errors.New(x)
case error:
return x
default:
return fmt.Errorf("unknown panic: %v", r)
}
}