components/persistent_cache/sqlite/sqlite_backend_impl.h

// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PERSISTENT_CACHE_SQLITE_SQLITE_BACKEND_IMPL_H_
#define COMPONENTS_PERSISTENT_CACHE_SQLITE_SQLITE_BACKEND_IMPL_H_

#include <memory>
#include <optional>

#include "base/component_export.h"
#include "base/files/file_path.h"
#include "base/types/pass_key.h"
#include "components/persistent_cache/backend.h"
#include "components/persistent_cache/entry.h"
#include "components/persistent_cache/sqlite/vfs/sqlite_database_vfs_file_set.h"
#include "components/persistent_cache/sqlite/vfs/sqlite_sandboxed_vfs.h"
#include "sql/database.h"

namespace persistent_cache {

class COMPONENT_EXPORT(PERSISTENT_CACHE) SqliteBackendImpl : public Backend {
 public:
  using Passkey = base::PassKey<SqliteBackendImpl>;
  explicit SqliteBackendImpl(BackendParams backend_params);
  explicit SqliteBackendImpl(SqliteVfsFileSet vfs_file_set);
  ~SqliteBackendImpl() override;

  SqliteBackendImpl(const SqliteBackendImpl&) = delete;
  SqliteBackendImpl(SqliteBackendImpl&&) = delete;
  SqliteBackendImpl& operator=(const SqliteBackendImpl&) = delete;
  SqliteBackendImpl& operator=(SqliteBackendImpl&&) = delete;

  // `Backend`:
  [[nodiscard]] bool Initialize() override;
  [[nodiscard]] std::unique_ptr<Entry> Find(std::string_view key) override;
  void Insert(std::string_view key, base::span<const uint8_t> content) override;

 private:
  static SqliteVfsFileSet GetVfsFileSetFromParams(BackendParams backend_params);
  base::FilePath database_path_;
  sql::Database db_;
  SqliteSandboxedVfsDelegate::UnregisterRunner unregister_runner_;
  bool initialized_ = false;
};

}  // namespace persistent_cache

#endif  // COMPONENTS_PERSISTENT_CACHE_SQLITE_SQLITE_BACKEND_IMPL_H_