qBittorrent
asyncfilestorage.cpp
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1 /*
2  * Bittorrent Client using Qt and libtorrent.
3  * Copyright (C) 2017 Vladimir Golovnev <glassez@yandex.ru>
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
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28 
29 #include "asyncfilestorage.h"
30 
31 #include <QDebug>
32 #include <QMetaObject>
33 
34 #include "base/utils/io.h"
35 
36 AsyncFileStorage::AsyncFileStorage(const QString &storageFolderPath, QObject *parent)
37  : QObject(parent)
38  , m_storageDir(storageFolderPath)
39  , m_lockFile(m_storageDir.absoluteFilePath(QStringLiteral("storage.lock")))
40 {
41  if (!m_storageDir.mkpath(m_storageDir.absolutePath()))
43  {tr("Could not create directory '%1'.")
44  .arg(m_storageDir.absolutePath())};
45 
46  // TODO: This folder locking approach does not work for UNIX systems. Implement it.
47  if (!m_lockFile.open(QFile::WriteOnly))
48  throw AsyncFileStorageError {m_lockFile.errorString()};
49 }
50 
52 {
53  m_lockFile.close();
54  m_lockFile.remove();
55 }
56 
57 void AsyncFileStorage::store(const QString &fileName, const QByteArray &data)
58 {
59  QMetaObject::invokeMethod(this, [this, data, fileName]() { store_impl(fileName, data); }
60  , Qt::QueuedConnection);
61 }
62 
64 {
65  return m_storageDir;
66 }
67 
68 void AsyncFileStorage::store_impl(const QString &fileName, const QByteArray &data)
69 {
70  const QString filePath = m_storageDir.absoluteFilePath(fileName);
71  qDebug() << "AsyncFileStorage: Saving data to" << filePath;
72 
73  const nonstd::expected<void, QString> result = Utils::IO::saveToFile(filePath, data);
74  if (!result)
75  {
76  qDebug() << "AsyncFileStorage: Failed to save data";
77  emit failed(filePath, result.error());
78  }
79 }
AsyncFileStorage(const QString &storageFolderPath, QObject *parent=nullptr)
Q_INVOKABLE void store_impl(const QString &fileName, const QByteArray &data)
void failed(const QString &fileName, const QString &errorString)
~AsyncFileStorage() override
QDir storageDir() const
void store(const QString &fileName, const QByteArray &data)
QString fileName(const QString &filePath)
Definition: fs.cpp:87
nonstd::expected< void, QString > saveToFile(const QString &path, const QByteArray &data)
Definition: io.cpp:69