claim/timestamp_updater.h

// Copyright 2026 Google LLC
//
// 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
//
//    https://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.
//

#ifndef THIRD_PARTY_CREDENTIO_CLAIM_TIMESTAMP_UPDATER_H_
#define THIRD_PARTY_CREDENTIO_CLAIM_TIMESTAMP_UPDATER_H_

#include <memory>
#include <string>
#include <utility>

#include "absl/base/nullability.h"
#include "absl/functional/any_invocable.h"
#include "absl/status/status.h"
#include "async/async_context.h"
#include "cose/timestamp_creator.h"

namespace credentio {
// Updater of claim timestamps in C2PA manifest stores.
class ClaimTimestampUpdater {
 public:
  explicit ClaimTimestampUpdater(
      std::unique_ptr<TimestampCreator> timestamp_creator)
      : timestamp_creator_(std::move(timestamp_creator)) {}

  // Inserts a timestamp to the active manifest in the given manifest store, if
  // a timestamp is not found; otherwise, makes no change. If a timestamp is
  // inserted, it resizes the `pad` in the unprotected header to ensure the size
  // of the result is the same as the input.
  //
  // Returns an error if space is insufficient for padding.
  void InsertTimestamp(std::string* absl_nonnull manifest_store,
                       AsyncContext async_context,
                       absl::AnyInvocable<void(absl::Status) &&> cb) const;

 private:
  std::unique_ptr<TimestampCreator> timestamp_creator_;
};
}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_CLAIM_TIMESTAMP_UPDATER_H_