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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef DOM_FS_PARENT_DATAMODEL_FILESYSTEMDATABASEMANAGER_H_
#define DOM_FS_PARENT_DATAMODEL_FILESYSTEMDATABASEMANAGER_H_
#include "ResultConnection.h"
#include "mozilla/dom/FileSystemTypes.h"
#include "mozilla/dom/quota/ForwardDecls.h"
#include "mozilla/dom/quota/UsageInfo.h"
#include "nsStringFwd.h"
template <class T>
class nsCOMPtr;
class nsIFile;
namespace mozilla {
template <typename V, typename E>
class Result;
namespace dom {
namespace quota {
struct OriginMetadata;
} // namespace quota
namespace fs {
struct FileId;
enum class FileMode;
class FileSystemChildMetadata;
class FileSystemEntryMetadata;
class FileSystemDirectoryListing;
class FileSystemEntryPair;
namespace data {
using FileSystemConnection = fs::ResultConnection;
class FileSystemDatabaseManager {
public:
/**
* @brief Updates stored usage data for all tracked files.
*
* @return nsresult error code
*/
static nsresult RescanUsages(const ResultConnection& aConnection,
const quota::OriginMetadata& aOriginMetadata);
/**
* @brief Obtains the current total usage for origin and connection.
*
* @return Result<quota::UsageInfo, QMResult> On success,
* - field UsageInfo::DatabaseUsage contains the sum of current
* total database and file usage,
* - field UsageInfo::FileUsage is not used and should be equal to Nothing.
*
* If the disk is inaccessible, various IO related errors may be returned.
*/
static Result<quota::UsageInfo, QMResult> GetUsage(
const ResultConnection& aConnection,
const quota::OriginMetadata& aOriginMetadata);
/**
* @brief Refreshes the stored file size.
*
* @param aEntry EntryId of the file whose size is refreshed.
*/
virtual nsresult UpdateUsage(const FileId& aFileId) = 0;
/**
* @brief Returns directory identifier, optionally creating it if it doesn't
* exist
*
* @param aHandle Current directory and filename
* @return Result<bool, QMResult> Directory identifier or error
*/
virtual Result<EntryId, QMResult> GetOrCreateDirectory(
const FileSystemChildMetadata& aHandle, bool aCreate) = 0;
/**
* @brief Returns file identifier, optionally creating it if it doesn't exist
*
* @param aHandle Current directory and filename
* @param aType Content type which is ignored if the file already exists
* @param aCreate true if file is to be created when it does not already exist
* @return Result<bool, QMResult> File identifier or error
*/
virtual Result<EntryId, QMResult> GetOrCreateFile(
const FileSystemChildMetadata& aHandle, bool aCreate) = 0;
/**
* @brief Returns the properties of a file corresponding to a file handle
*/
virtual nsresult GetFile(const EntryId& aEntryId, const FileId& aFileId,
const FileMode& aMode, ContentType& aType,
TimeStamp& lastModifiedMilliSeconds, Path& aPath,
nsCOMPtr<nsIFile>& aFile) const = 0;
virtual Result<FileSystemDirectoryListing, QMResult> GetDirectoryEntries(
const EntryId& aParent, PageNumber aPage) const = 0;
/**
* @brief Removes a directory
*
* @param aHandle Current directory and filename
* @return Result<bool, QMResult> False if file did not exist, otherwise true
* or error
*/
virtual Result<bool, QMResult> RemoveDirectory(
const FileSystemChildMetadata& aHandle, bool aRecursive) = 0;
/**
* @brief Removes a file
*
* @param aHandle Current directory and filename
* @return Result<bool, QMResult> False if file did not exist, otherwise true
* or error
*/
virtual Result<bool, QMResult> RemoveFile(
const FileSystemChildMetadata& aHandle) = 0;
/**
* @brief Rename a file/directory
*
* @param aHandle Source directory or file
* @param aNewName New entry name
* @return Result<EntryId, QMResult> The relevant entry id or error
*/
virtual Result<EntryId, QMResult> RenameEntry(
const FileSystemEntryMetadata& aHandle, const Name& aNewName) = 0;
/**
* @brief Move a file/directory
*
* @param aHandle Source directory or file
* @param aNewDesignation Destination directory and entry name
* @return Result<EntryId, QMResult> The relevant entry id or error
*/
virtual Result<EntryId, QMResult> MoveEntry(
const FileSystemEntryMetadata& aHandle,
const FileSystemChildMetadata& aNewDesignation) = 0;
/**
* @brief Tries to connect a parent directory to a file system item with a
* path, excluding the parent directory
*
* @param aHandle Pair of parent directory and child item candidates
* @return Result<Path, QMResult> Path or error if no it didn't exists
*/
virtual Result<Path, QMResult> Resolve(
const FileSystemEntryPair& aEndpoints) const = 0;
/**
* @brief Generates an EntryId for a given parent EntryId and filename.
*/
virtual Result<EntryId, QMResult> GetEntryId(
const FileSystemChildMetadata& aHandle) const = 0;
/**
* @brief To check if a file under a directory is locked, we need to map
* fileId's to entries.
*
* @param aFileId a FileId
* @return Result<EntryId, QMResult> Entry id of a temporary or main file
*/
virtual Result<EntryId, QMResult> GetEntryId(const FileId& aFileId) const = 0;
/**
* @brief Make sure EntryId maps to a FileId. This method should be called
* before exclusive locking is attempted.
*/
virtual Result<FileId, QMResult> EnsureFileId(const EntryId& aEntryId) = 0;
/**
* @brief Make sure EntryId maps to a temporary FileId. This method should be
* called before shared locking is attempted.
*/
virtual Result<FileId, QMResult> EnsureTemporaryFileId(
const EntryId& aEntryId) = 0;
/**
* @brief To support moves in metadata, the actual files on disk are tagged
* with file id's which are mapped to entry id's which represent paths.
* This function returns the main file corresponding to an entry.
*
* @param aEntryId An id of an entry
* @return Result<EntryId, QMResult> Main file id, used by exclusive locks
*/
virtual Result<FileId, QMResult> GetFileId(const EntryId& aEntryId) const = 0;
/**
* @brief Flag aFileId as the main file for aEntryId or abort. Removes the
* file which did not get flagged as the main file.
*/
virtual nsresult MergeFileId(const EntryId& aEntryId, const FileId& aFileId,
bool aAbort) = 0;
/**
* @brief Close database connection.
*/
virtual void Close() = 0;
/**
* @brief Start tracking file's usage.
*/
virtual nsresult BeginUsageTracking(const FileId& aFileId) = 0;
/**
* @brief Stop tracking file's usage.
*/
virtual nsresult EndUsageTracking(const FileId& aFileId) = 0;
virtual ~FileSystemDatabaseManager() = default;
};
} // namespace data
} // namespace fs
} // namespace dom
} // namespace mozilla
#endif // DOM_FS_PARENT_DATAMODEL_FILESYSTEMDATABASEMANAGER_H_