Special FileSystem implementation for libraries and projects. More...

#include <transactionalfilesystem.h>

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Public Types
enum	RestoreMode

Public Member Functions
	TransactionalFileSystem ()=delete

	TransactionalFileSystem (const FilePath &filepath, bool writable=false, RestoreMode restoreMode=RestoreMode::NO, QObject *parent=nullptr)

	TransactionalFileSystem (const TransactionalFileSystem &other)=delete

virtual	~TransactionalFileSystem () noexcept

bool	isWritable () const noexcept

bool	isRestoredFromAutosave () const noexcept

virtual FilePath	getAbsPath (const QString &path="") const noexceptoverride

virtual QStringList	getDirs (const QString &path="") const noexceptoverride

virtual QStringList	getFiles (const QString &path="") const noexceptoverride

virtual bool	fileExists (const QString &path) const noexceptoverride

virtual QByteArray	read (const QString &path) const override

virtual void	write (const QString &path, const QByteArray &content) override

virtual void	removeFile (const QString &path) override

virtual void	removeDirRecursively (const QString &path="") override

void	loadFromZip (const FilePath &fp)

void	exportToZip (const FilePath &fp) const

void	autosave ()

void	save ()

Public Member Functions inherited from FileSystem
	FileSystem (QObject *parent=nullptr) noexcept

virtual	~FileSystem () noexcept

Static Public Member Functions
static std::shared_ptr < TransactionalFileSystem >	open (const FilePath &filepath, bool writable, RestoreMode restoreMode=RestoreMode::NO, QObject *parent=nullptr)

static std::shared_ptr < TransactionalFileSystem >	openRO (const FilePath &filepath, RestoreMode restoreMode=RestoreMode::NO, QObject *parent=nullptr)

static std::shared_ptr < TransactionalFileSystem >	openRW (const FilePath &filepath, RestoreMode restoreMode=RestoreMode::NO, QObject *parent=nullptr)

static QString	cleanPath (QString path) noexcept

Private Member Functions
bool	isRemoved (const QString &path) const noexcept

void	exportDirToZip (QuaZipFile &file, const FilePath &zipFp, const QString &dir) const

void	saveDiff (const QString &type) const

void	loadDiff (const FilePath &fp)

void	removeDiff (const QString &type)

void	discardChanges () noexcept

Private Attributes
FilePath	mFilePath

bool	mIsWritable

DirectoryLock	mLock

bool	mRestoredFromAutosave

QHash< QString, QByteArray >	mModifiedFiles

QSet< QString >	mRemovedFiles

QSet< QString >	mRemovedDirs

Detailed Description

Special FileSystem implementation for libraries and projects.

This is an implementation of the librepcb::FileSystem interface with many features needed to create, open and save LibrePCB library elements and projects in a very safe way to always guarantee consistency of all files.

It handles following things:

Supports read-only access to the file system to guarantee absolutely nothing is written to the disk.
In R/W mode, it locks the accessed directory to avoid parallel usage (see Avoid opening a project multiple times (Directory Lock))
Supports periodic saving to allow restoring the last autosave backup after an application crash (see Automatic Periodic Saving (autosave)).
Holds all file modifications in memory and allows to write those in an atomic way to the disk (see Atomic Saving Procedure).
Allows to export the whole file system to a ZIP file.

Member Enumeration Documentation

enum RestoreMode

strong

Enumerator
NO	Do not restore the backup.
YES	Restore backup if available.
ASK	Ask (with QMessageBox) whether to restore or not.
ABORT	Throw a RuntimeError if a backup exists.

Constructor & Destructor Documentation

TransactionalFileSystem ( )

delete

TransactionalFileSystem	(	const FilePath &	filepath,
		bool	writable = `false`,
		RestoreMode	restoreMode = `RestoreMode::NO`,
		QObject *	parent = `nullptr`
	)

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TransactionalFileSystem ( const TransactionalFileSystem & other )

delete

~TransactionalFileSystem ( )

virtualnoexcept

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Member Function Documentation

bool isWritable ( ) const

inlinenoexcept

bool isRestoredFromAutosave ( ) const

inlinenoexcept

FilePath getAbsPath ( const QString & path = "" ) const

overridevirtualnoexcept

Implements FileSystem.

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QStringList getDirs ( const QString & path = "" ) const

overridevirtualnoexcept

Implements FileSystem.

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QStringList getFiles ( const QString & path = "" ) const

overridevirtualnoexcept

Implements FileSystem.

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bool fileExists ( const QString & path ) const

overridevirtualnoexcept

Implements FileSystem.

QByteArray read ( const QString & path ) const

overridevirtual

Implements FileSystem.

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void write	(	const QString &	path,
		const QByteArray &	content
	)

overridevirtual

Implements FileSystem.

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void removeFile ( const QString & path )

overridevirtual

Implements FileSystem.

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void removeDirRecursively ( const QString & path = "" )

overridevirtual

Implements FileSystem.

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void loadFromZip ( const FilePath & fp )

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void exportToZip ( const FilePath & fp ) const

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void autosave ( )

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void save ( )

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static std::shared_ptr<TransactionalFileSystem> open	(	const FilePath &	filepath,
		bool	writable,
		RestoreMode	restoreMode = `RestoreMode::NO`,
		QObject *	parent = `nullptr`
	)

inlinestatic

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static std::shared_ptr<TransactionalFileSystem> openRO	(	const FilePath &	filepath,
		RestoreMode	restoreMode = `RestoreMode::NO`,
		QObject *	parent = `nullptr`
	)

inlinestatic

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static std::shared_ptr<TransactionalFileSystem> openRW	(	const FilePath &	filepath,
		RestoreMode	restoreMode = `RestoreMode::NO`,
		QObject *	parent = `nullptr`
	)

inlinestatic

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QString cleanPath ( QString path )

staticnoexcept

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bool isRemoved ( const QString & path ) const

privatenoexcept

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void exportDirToZip	(	QuaZipFile &	file,
		const FilePath &	zipFp,
		const QString &	dir
	)		const

private

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void saveDiff ( const QString & type ) const

private

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void loadDiff ( const FilePath & fp )

private

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void removeDiff ( const QString & type )

private

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void discardChanges ( )

privatenoexcept

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Member Data Documentation

FilePath mFilePath

private

bool mIsWritable

private

DirectoryLock mLock

private

bool mRestoredFromAutosave

private

QHash<QString, QByteArray> mModifiedFiles

private

QSet<QString> mRemovedFiles

private

QSet<QString> mRemovedDirs

private

The documentation for this class was generated from the following files:

/__w/1/s/libs/librepcb/common/fileio/transactionalfilesystem.h
/__w/1/s/libs/librepcb/common/fileio/transactionalfilesystem.cpp

Public Types

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation