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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#pragma once
#include <functional>
#include <memory>
#include <optional>
#include <string>
#include <type_traits>
#include <vector>
#include "flutter/fml/macros.h"
#include "impeller/archivist/archivable.h"
namespace impeller {
class ArchiveLocation;
class ArchiveDatabase;
class Archive {
public:
Archive(const std::string& path);
~Archive();
bool IsValid() const;
template <class T,
class = std::enable_if_t<std::is_base_of<Archivable, T>::value>>
[[nodiscard]] bool Write(const T& archivable) {
const ArchiveDef& def = T::kArchiveDefinition;
return ArchiveInstance(def, archivable).has_value();
}
template <class T,
class = std::enable_if_t<std::is_base_of<Archivable, T>::value>>
[[nodiscard]] bool Read(PrimaryKey name, T& archivable) {
const ArchiveDef& def = T::kArchiveDefinition;
return UnarchiveInstance(def, name, archivable);
}
using UnarchiveStep = std::function<bool(ArchiveLocation&)>;
template <class T,
class = std::enable_if_t<std::is_base_of<Archivable, T>::value>>
[[nodiscard]] size_t Read(UnarchiveStep stepper) {
const ArchiveDef& def = T::kArchiveDefinition;
return UnarchiveInstances(def, stepper);
}
private:
std::unique_ptr<ArchiveDatabase> database_;
int64_t transaction_count_ = 0;
friend class ArchiveLocation;
std::optional<int64_t /* row id */> ArchiveInstance(
const ArchiveDef& definition,
const Archivable& archivable);
bool UnarchiveInstance(const ArchiveDef& definition,
PrimaryKey name,
Archivable& archivable);
size_t UnarchiveInstances(const ArchiveDef& definition,
UnarchiveStep stepper,
PrimaryKey primary_key = std::nullopt);
FML_DISALLOW_COPY_AND_ASSIGN(Archive);
};
} // namespace impeller