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package bug
import (
"encoding/json"
"fmt"
"github.com/MichaelMure/git-bug/identity"
"github.com/MichaelMure/git-bug/util/git"
)
var _ Operation = &SetMetadataOperation{}
type SetMetadataOperation struct {
OpBase
Target git.Hash
NewMetadata map[string]string
}
func (op *SetMetadataOperation) base() *OpBase {
return &op.OpBase
}
func (op *SetMetadataOperation) Hash() (git.Hash, error) {
return hashOperation(op)
}
func (op *SetMetadataOperation) Apply(snapshot *Snapshot) {
for _, target := range snapshot.Operations {
hash, err := target.Hash()
if err != nil {
// Should never error unless a programming error happened
// (covered in OpBase.Validate())
panic(err)
}
if hash == op.Target {
base := target.base()
if base.extraMetadata == nil {
base.extraMetadata = make(map[string]string)
}
for key, val := range op.NewMetadata {
if _, exist := base.extraMetadata[key]; !exist {
base.extraMetadata[key] = val
}
}
return
}
}
}
func (op *SetMetadataOperation) Validate() error {
if err := opBaseValidate(op, SetMetadataOp); err != nil {
return err
}
if !op.Target.IsValid() {
return fmt.Errorf("target hash is invalid")
}
return nil
}
// Workaround to avoid the inner OpBase.MarshalJSON overriding the outer op
// MarshalJSON
func (op *SetMetadataOperation) MarshalJSON() ([]byte, error) {
base, err := json.Marshal(op.OpBase)
if err != nil {
return nil, err
}
// revert back to a flat map to be able to add our own fields
var data map[string]interface{}
if err := json.Unmarshal(base, &data); err != nil {
return nil, err
}
data["target"] = op.Target
data["new_metadata"] = op.NewMetadata
return json.Marshal(data)
}
// Workaround to avoid the inner OpBase.MarshalJSON overriding the outer op
// MarshalJSON
func (op *SetMetadataOperation) UnmarshalJSON(data []byte) error {
// Unmarshal OpBase and the op separately
base := OpBase{}
err := json.Unmarshal(data, &base)
if err != nil {
return err
}
aux := struct {
Target git.Hash `json:"target"`
NewMetadata map[string]string `json:"new_metadata"`
}{}
err = json.Unmarshal(data, &aux)
if err != nil {
return err
}
op.OpBase = base
op.Target = aux.Target
op.NewMetadata = aux.NewMetadata
return nil
}
// Sign post method for gqlgen
func (op *SetMetadataOperation) IsAuthored() {}
func NewSetMetadataOp(author identity.Interface, unixTime int64, target git.Hash, newMetadata map[string]string) *SetMetadataOperation {
return &SetMetadataOperation{
OpBase: newOpBase(SetMetadataOp, author, unixTime),
Target: target,
NewMetadata: newMetadata,
}
}
// Convenience function to apply the operation
func SetMetadata(b Interface, author identity.Interface, unixTime int64, target git.Hash, newMetadata map[string]string) (*SetMetadataOperation, error) {
SetMetadataOp := NewSetMetadataOp(author, unixTime, target, newMetadata)
if err := SetMetadataOp.Validate(); err != nil {
return nil, err
}
b.Append(SetMetadataOp)
return SetMetadataOp, nil
}
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