1 files changed, 84 insertions, 0 deletions
diff --git a/src/buildtool/common/git_hashes_converter.hpp b/src/buildtool/common/git_hashes_converter.hpp
new file mode 100644
index 00000000..c856b749
--- /dev/null
+++ b/src/buildtool/common/git_hashes_converter.hpp
@@ -0,0 +1,84 @@
+// 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_COMMON_GIT_HASHES_CONVERTER_HPP
+#define INCLUDED_SRC_BUILDTOOL_COMMON_GIT_HASHES_CONVERTER_HPP
+
+#include <mutex>  //std::unique_lock
+#include <optional>
+#include <shared_mutex>
+#include <string>
+#include <unordered_map>
+#include <utility>
+
+#include "src/buildtool/crypto/hash_function.hpp"
+#include "src/buildtool/logging/log_level.hpp"
+#include "src/buildtool/logging/logger.hpp"
+
+class GitHashesConverter final {
+    using git_hash = std::string;
+    using compat_hash = std::string;
+    using git_repo = std::string;
+    using GitToCompatibleMap = std::unordered_map<git_hash, compat_hash>;
+    using CompatibleToGitMap =
+        std::unordered_map<compat_hash, std::pair<git_hash, git_repo>>;
+
+  public:
+    [[nodiscard]] static auto Instance() noexcept -> GitHashesConverter& {
+        static GitHashesConverter instance;
+        return instance;
+    }
+
+    [[nodiscard]] auto RegisterGitEntry(std::string const& git_hash,
+                                        std::string const& data,
+                                        std::string const& repo)
+        -> compat_hash {
+        {
+            std::shared_lock lock_{mutex_};
+            auto it = git_to_compatible_.find(git_hash);
+            if (it != git_to_compatible_.end()) {
+                return it->second;
+            }
+        }
+        // This is only used in compatible mode.
+        HashFunction const hash_function{HashFunction::Type::PlainSHA256};
+        auto compatible_hash = hash_function.PlainHashData(data).HexString();
+        std::unique_lock lock_{mutex_};
+        git_to_compatible_[git_hash] = compatible_hash;
+        compatible_to_git_[compatible_hash] = {git_hash, repo};
+        return compatible_hash;
+    }
+
+    [[nodiscard]] auto GetGitEntry(std::string const& compatible_hash)
+        -> std::optional<std::pair<git_hash const&, git_repo const&>> {
+        std::shared_lock lock_{mutex_};
+        auto it = compatible_to_git_.find(compatible_hash);
+        if (it != compatible_to_git_.end()) {
+            return it->second;
+        }
+        Logger::Log(LogLevel::Warning,
+                    "Unable to get the git-sha1 code associated to {}",
+                    compatible_hash);
+        return std::nullopt;
+    }
+
+  private:
+    explicit GitHashesConverter() noexcept = default;
+
+    GitToCompatibleMap git_to_compatible_{};
+    CompatibleToGitMap compatible_to_git_{};
+    std::shared_mutex mutex_;
+};
+
+#endif  // INCLUDED_SRC_BUILDTOOL_COMMON_GIT_HASHES_CONVERTER_HPP
+\ No newline at end of file