mirror of https://github.com/status-im/consul.git
71 lines
1.8 KiB
Go
71 lines
1.8 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package resource
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import (
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"context"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"google.golang.org/protobuf/proto"
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"github.com/hashicorp/consul/proto-public/pbresource"
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)
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// DecodedResource is a generic holder to contain an original Resource and its
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// decoded contents.
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type DecodedResource[T proto.Message] struct {
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Resource *pbresource.Resource
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Data T
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}
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func (d *DecodedResource[T]) GetResource() *pbresource.Resource {
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if d == nil {
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return nil
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}
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return d.Resource
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}
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func (d *DecodedResource[T]) GetData() T {
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if d == nil {
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var zero T
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return zero
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}
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return d.Data
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}
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// Decode will generically decode the provided resource into a 2-field
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// structure that holds onto the original Resource and the decoded contents.
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//
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// Returns an ErrDataParse on unmarshalling errors.
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func Decode[T proto.Message](res *pbresource.Resource) (*DecodedResource[T], error) {
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var zero T
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data := zero.ProtoReflect().New().Interface().(T)
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// check that there is data to unmarshall
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if res.Data != nil {
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if err := res.Data.UnmarshalTo(data); err != nil {
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return nil, NewErrDataParse(data, err)
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}
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}
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return &DecodedResource[T]{
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Resource: res,
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Data: data,
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}, nil
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}
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// GetDecodedResource will generically read the requested resource using the
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// client and either return nil on a NotFound or decode the response value.
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func GetDecodedResource[T proto.Message](ctx context.Context, client pbresource.ResourceServiceClient, id *pbresource.ID) (*DecodedResource[T], error) {
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rsp, err := client.Read(ctx, &pbresource.ReadRequest{Id: id})
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switch {
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case status.Code(err) == codes.NotFound:
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return nil, nil
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case err != nil:
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return nil, err
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}
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return Decode[T](rsp.Resource)
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}
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