////////////////////////////////////////////////////////////////////////////////
// Copyright 2020 Google LLC.
//
// This software is licensed under the terms defined in the Widevine Master
// License Agreement. For a copy of this agreement, please contact
// widevine-licensing@google.com.
////////////////////////////////////////////////////////////////////////////////

#include "common/hash_algorithm_util.h"

#include "glog/logging.h"
#include "protos/public/hash_algorithm.pb.h"

namespace widevine {

HashAlgorithm HashAlgorithmProtoToEnum(
    HashAlgorithmProto hash_algorithm_proto) {
  switch (hash_algorithm_proto) {
    case HASH_ALGORITHM_UNSPECIFIED:
      return HashAlgorithm::kUnspecified;
    case HASH_ALGORITHM_SHA_1:
      return HashAlgorithm::kSha1;
    case HASH_ALGORITHM_SHA_256:
      return HashAlgorithm::kSha256;
    default:
      // See below link for using proto3 enum in switch statement:
      // http://shortn/_ma9MY7V9wh
      if (HashAlgorithmProto_IsValid(hash_algorithm_proto)) {
        LOG(ERROR) << "Unsupported value " << hash_algorithm_proto;
      } else {
        LOG(WARNING) << "Unexpected value " << hash_algorithm_proto;
      }
      return HashAlgorithm::kUnspecified;
  }
}

HashAlgorithmProto HashAlgorithmEnumToProto(HashAlgorithm hash_algorithm) {
  switch (hash_algorithm) {
    case HashAlgorithm::kUnspecified:
      return HASH_ALGORITHM_UNSPECIFIED;
    case HashAlgorithm::kSha1:
      return HASH_ALGORITHM_SHA_1;
    case HashAlgorithm::kSha256:
      return HASH_ALGORITHM_SHA_256;
  }
  LOG(WARNING) << "Unexpected hash algorithm "
               << static_cast<int>(hash_algorithm);
  return HASH_ALGORITHM_UNSPECIFIED;
}

}  // namespace widevine