| // Copyright 2018 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package rpc |
| |
| import ( |
| "google.golang.org/genproto/protobuf/field_mask" |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/status" |
| |
| "go.chromium.org/luci/common/data/stringset" |
| ) |
| |
| // valdiateUpdateMask validates the given update mask. |
| func validateUpdateMask(m *field_mask.FieldMask) error { |
| switch { |
| case m == nil: |
| return status.Error(codes.InvalidArgument, "update mask is required") |
| case len(m.Paths) == 0: |
| return status.Error(codes.InvalidArgument, "at least one update mask path is required") |
| } |
| // Path names must be unique. |
| // Keep records of ones we've already seen. |
| paths := stringset.New(len(m.Paths)) |
| for _, path := range m.Paths { |
| if !paths.Add(path) { |
| return status.Errorf(codes.InvalidArgument, "duplicate update mask path %q", path) |
| } |
| } |
| return nil |
| } |
