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package bug
import (
"encoding/json"
"github.com/pkg/errors"
"github.com/MichaelMure/git-bug/entity"
"github.com/MichaelMure/git-bug/identity"
)
var _ Operation = &SetMetadataOperation{}
type SetMetadataOperation struct {
OpBase
Target entity.Id `json:"target"`
NewMetadata map[string]string `json:"new_metadata"`
}
// Sign-post method for gqlgen
func (op *SetMetadataOperation) IsOperation() {}
func (op *SetMetadataOperation) Id() entity.Id {
return idOperation(op, &op.OpBase)
}
func (op *SetMetadataOperation) Apply(snapshot *Snapshot) {
for _, target := range snapshot.Operations {
if target.Id() == op.Target {
// Apply the metadata in an immutable way: if a metadata already
// exist, it's not possible to override it.
for key, value := range op.NewMetadata {
target.setExtraMetadataImmutable(key, value)
}
return
}
}
}
func (op *SetMetadataOperation) Validate() error {
if err := op.OpBase.Validate(op, SetMetadataOp); err != nil {
return err
}
if err := op.Target.Validate(); err != nil {
return errors.Wrap(err, "target invalid")
}
return nil
}
// UnmarshalJSON is a two step JSON unmarshaling
// This workaround is necessary to avoid the inner OpBase.MarshalJSON
// overriding the outer op's 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 entity.Id `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 entity.Id, 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 entity.Id, 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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