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// Copyright 2022 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_TREE_HPP
#define INCLUDED_SRC_BUILDTOOL_COMMON_TREE_HPP
#include <memory>
#include <string>
#include <unordered_map>
#include "nlohmann/json.hpp"
#include "src/buildtool/common/action_description.hpp"
#include "src/buildtool/common/artifact_description.hpp"
// Describes tree, its inputs, output (tree artifact), and action (tree action).
class Tree {
using inputs_t = ActionDescription::inputs_t;
public:
using Ptr = std::shared_ptr<Tree>;
explicit Tree(inputs_t&& inputs)
: id_{ComputeId(inputs)}, inputs_{std::move(inputs)} {}
[[nodiscard]] auto Id() const& -> std::string const& { return id_; }
[[nodiscard]] auto Id() && -> std::string { return std::move(id_); }
[[nodiscard]] auto ToJson() const -> nlohmann::json {
return ComputeDescription(inputs_);
}
[[nodiscard]] auto Inputs() const -> inputs_t { return inputs_; }
[[nodiscard]] auto Action() const -> ActionDescription {
return {
{/*unused*/}, {/*unused*/}, Action::CreateTreeAction(id_), inputs_};
}
[[nodiscard]] auto Output() const -> ArtifactDescription {
return ArtifactDescription{id_};
}
[[nodiscard]] static auto FromJson(std::string const& id,
nlohmann::json const& json)
-> std::optional<Tree::Ptr> {
auto inputs = inputs_t{};
inputs.reserve(json.size());
for (auto const& [path, artifact] : json.items()) {
auto artifact_desc = ArtifactDescription::FromJson(artifact);
if (not artifact_desc) {
return std::nullopt;
}
inputs.emplace(path, std::move(*artifact_desc));
}
return std::make_shared<Tree>(id, std::move(inputs));
}
Tree(std::string id, inputs_t&& inputs)
: id_{std::move(id)}, inputs_{std::move(inputs)} {}
private:
std::string id_;
inputs_t inputs_;
static auto ComputeDescription(inputs_t const& inputs) -> nlohmann::json {
auto json = nlohmann::json::object();
for (auto const& [path, artifact] : inputs) {
json[path] = artifact.ToJson();
}
return json;
}
static auto ComputeId(inputs_t const& inputs) -> std::string {
return HashFunction::ComputeHash(ComputeDescription(inputs).dump())
.HexString();
}
};
#endif // INCLUDED_SRC_BUILDTOOL_COMMON_TREE_HPP
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