validator/manifest_consumer.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_VALIDATOR_MANIFEST_CONSUMER_H_
#define THIRD_PARTY_CREDENTIO_VALIDATOR_MANIFEST_CONSUMER_H_

#include "absl/status/status.h"
#include "proto/ingredient_validation_result.pb.h"
#include "proto/manifest.pb.h"

namespace credentio {

// Interface for consumers that observe manifest validation events during
// manifest graph traversal.
//
// Consumers are the extension point for enrichment that the validator itself
// does not implement, e.g. deriving a digital source type from the actions
// recorded in the manifests. Validation results are identical with and without
// consumers; only the enriched fields differ.
class ManifestConsumer {
 public:
  virtual ~ManifestConsumer() = default;

  // Called when a manifest node has been successfully validated.
  // `is_active_manifest` indicates if this is the root active manifest.
  virtual absl::Status OnManifestValidated(const Manifest& manifest,
                                           bool is_active_manifest) = 0;

  // Called after a complete ingredient validation result has been converted
  // from a validation result.
  virtual absl::Status OnIngredientValidationResultComplete(
      IngredientValidationResultProto* ingredient_result) {
    return absl::OkStatus();
  }
};

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_VALIDATOR_MANIFEST_CONSUMER_H_