102 lines
1.9 KiB
Go
102 lines
1.9 KiB
Go
package ormtable
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import (
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"context"
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"encoding/json"
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"io"
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"google.golang.org/protobuf/encoding/protojson"
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"google.golang.org/protobuf/proto"
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)
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// singleton implements a Table instance for singletons.
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type singleton struct {
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*tableImpl
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}
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func (t singleton) DefaultJSON() json.RawMessage {
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msg := t.MessageType().New().Interface()
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bz, err := t.jsonMarshalOptions().Marshal(msg)
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if err != nil {
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return json.RawMessage("{}")
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}
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return bz
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}
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func (t singleton) ValidateJSON(reader io.Reader) error {
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bz, err := io.ReadAll(reader)
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if err != nil {
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return err
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}
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msg := t.MessageType().New().Interface()
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err = protojson.Unmarshal(bz, msg)
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if err != nil {
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return err
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}
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if t.customJSONValidator != nil {
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return t.customJSONValidator(msg)
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} else {
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return DefaultJSONValidator(msg)
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}
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}
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func (t singleton) ImportJSON(ctx context.Context, reader io.Reader) error {
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backend, err := t.getWriteBackend(ctx)
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if err != nil {
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return err
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}
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bz, err := io.ReadAll(reader)
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if err != nil {
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return err
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}
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msg := t.MessageType().New().Interface()
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err = protojson.Unmarshal(bz, msg)
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if err != nil {
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return err
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}
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return t.save(ctx, backend, msg, saveModeDefault)
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}
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func (t singleton) ExportJSON(ctx context.Context, writer io.Writer) error {
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msg := t.MessageType().New().Interface()
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found, err := t.Get(ctx, msg)
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if err != nil {
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return err
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}
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var bz []byte
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if !found {
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bz = t.DefaultJSON()
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} else {
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bz, err = t.jsonMarshalOptions().Marshal(msg)
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if err != nil {
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return err
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}
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}
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_, err = writer.Write(bz)
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return err
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}
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func (t singleton) jsonMarshalOptions() protojson.MarshalOptions {
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return protojson.MarshalOptions{
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Multiline: true,
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Indent: "",
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UseProtoNames: true,
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EmitUnpopulated: true,
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Resolver: t.typeResolver,
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}
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}
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func (t *singleton) GetTable(message proto.Message) Table {
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if message.ProtoReflect().Descriptor().FullName() == t.MessageType().Descriptor().FullName() {
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return t
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}
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return nil
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}
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