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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_FILE_MANAGER_INDEXING_FILE_INFO_TABLE_H_
#define CHROMEOS_ASH_COMPONENTS_FILE_MANAGER_INDEXING_FILE_INFO_TABLE_H_
#include <optional>
#include "base/memory/raw_ptr.h"
#include "chromeos/ash/components/file_manager/indexing/file_info.h"
#include "sql/database.h"
namespace ash::file_manager {
// Stores a mapping from URL IDs to FileInfo. This table is not intended to
// be used by itself, as it does not keep URLs. Instead, it is to be used by
// the SqlStorage class that can supply missing information from the url_table
// it owns.
class FileInfoTable {
public:
// Creates a table that maps URL IDs to FileInfo. It uses the
// given `url_table` to
explicit FileInfoTable(sql::Database* db);
~FileInfoTable();
FileInfoTable(const FileInfoTable&) = delete;
FileInfoTable& operator=(const FileInfoTable&) = delete;
// Initializes the table. Returns true on success, and false on failure.
bool Init();
// Attempts to retrieve the unique FileInfo associated with the given URL.
// Returns it as the value of the optional, if found.
// NO CHECK is performed whether the url_id corresponds to the `file_url`
// field in the `info` object.
std::optional<FileInfo> GetFileInfo(int64_t url_id) const;
// Attempts to store the given `info` in the table. If successful, it returns
// the ID of the URL from the `info` object that was used to store the `info`
// content. Otherwise, it returns -1. The `url_id` must be generated based on
// the `file_url` field of the `info` object.
// NO CHECK is performed whether the url_id corresponds to the `file_url`
// field in the `info` object.
int64_t PutFileInfo(int64_t url_id, const FileInfo& info);
// Attempts to remove the given file info from the database. If not present,
// this method returns -1. Otherwise, it returns the `url_id`.
int64_t DeleteFileInfo(int64_t url_id);
private:
// The pointer to a database owned by the whoever created this table.
raw_ptr<sql::Database> db_;
};
} // namespace ash::file_manager
#endif // CHROMEOS_ASH_COMPONENTS_FILE_MANAGER_INDEXING_FILE_INFO_TABLE_H_
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