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// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
//
// 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.
#ifndef INCLUDED_SRC_BUILDTOOL_EXECUTION_API_UTILS_REHASH_UTILS_HPP
#define INCLUDED_SRC_BUILDTOOL_EXECUTION_API_UTILS_REHASH_UTILS_HPP
#include <optional>
#include <string>
#include "src/buildtool/common/artifact.hpp"
#include "src/buildtool/common/artifact_digest.hpp"
#include "src/buildtool/file_system/object_type.hpp"
#include "src/buildtool/storage/config.hpp"
#include "src/utils/cpp/expected.hpp"
namespace RehashUtils {
/// \brief Get a corresponding known object from a different local CAS, as
/// stored in a mapping file, if exists.
/// \param digest Source digest.
/// \param source_config Storage config corresponding to source digest.
/// \param target_config Storage config corresponding to target digest.
/// \param from_git Specify if source digest comes from a Git location instead
/// of CAS.
/// \returns The target artifact info on successfully reading an existing
/// mapping file, nullopt if no mapping file exists, or the error message on
/// failure.
[[nodiscard]] auto ReadRehashedDigest(ArtifactDigest const& digest,
StorageConfig const& source_config,
StorageConfig const& target_config,
bool from_git = false) noexcept
-> expected<std::optional<Artifact::ObjectInfo>, std::string>;
/// \brief Write the mapping file linking two digests hashing the same content.
/// \param source_digest Source digest.
/// \param target_digest Target digest.
/// \param obj_type Object type of the content represented by the two digests.
/// \param source_config Storage config corresponding to source digest.
/// \param target_config Storage config corresponding to target digest.
/// \param from_git Specify if source digest comes from a Git location instead
/// of CAS.
/// \returns nullopt on success, error message on failure.
[[nodiscard]] auto StoreRehashedDigest(ArtifactDigest const& source_digest,
ArtifactDigest const& target_digest,
ObjectType obj_type,
StorageConfig const& source_config,
StorageConfig const& target_config,
bool from_git = false) noexcept
-> std::optional<std::string>;
} // namespace RehashUtils
#endif // INCLUDED_SRC_BUILDTOOL_EXECUTION_API_UTILS_REHASH_UTILS_HPP
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