fiff_file_sharer.cpp

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//=============================================================================================================
 
//=============================================================================================================
// INCLUDES
//=============================================================================================================
 
#include "fiff_file_sharer.h"
 
//=============================================================================================================
// QT INCLUDES
//=============================================================================================================
 
#include <QDir>
#include <QDebug>
 
//=============================================================================================================
// USED NAMESPACES
//=============================================================================================================
 
using namespace FIFFLIB;
 
//=============================================================================================================
// DEFINE STATIC MEMBERS
//=============================================================================================================
 
const static char m_sDefaultDirectory[]("realtime_shared_files");
const static char m_sDefaultFileName[]("realtime_file");
 
//=============================================================================================================
// DEFINE MEMBER METHODS
//=============================================================================================================
 
FiffFileSharer::FiffFileSharer()
: FiffFileSharer(m_sDefaultDirectory)
{
}
 
//=============================================================================================================
 
FiffFileSharer::FiffFileSharer(const QString& sDirName)
: m_sDirectory(QDir::currentPath() + "/" + sDirName)
, m_iFileIndex(0)
{
}
 
//=============================================================================================================
 
void FiffFileSharer::copyRealtimeFile(const QString &sSourcePath)
{
    if(initSharedDirectory()){
        QString sFilePath(m_sDirectory + "/" + m_sDefaultFileName + QString::number(m_iFileIndex++) + "_raw.fif");
 
        if(QFile::copy(sSourcePath, sFilePath)){
            QFile newFile(sFilePath);
            if(newFile.open(QIODevice::ReadWrite)){
                FIFFLIB::FiffStream stream(&newFile);
                stream.skipRawData(newFile.bytesAvailable());
                stream.finish_writing_raw();
 
                newFile.close();
            }
        }
    }
}
 
//=============================================================================================================
 
void FiffFileSharer::initWatcher()
{
    if(initSharedDirectory()){
        clearSharedDirectory();
        m_fileWatcher.addPath(m_sDirectory);
        connect(&m_fileWatcher, &QFileSystemWatcher::directoryChanged,
                this, &FiffFileSharer::onDirectoryChanged, Qt::UniqueConnection);
        connect(&m_fileWatcher, &QFileSystemWatcher::fileChanged,
                this, &FiffFileSharer::onFileChanged, Qt::UniqueConnection);
    } else {
        qWarning() << "[FiffFileSharer::initWatcher] Unable to initilaize shared directory";
    }
}
 
//=============================================================================================================
 
void FiffFileSharer::clearSharedDirectory()
{
    QDir directory(m_sDirectory);
    directory.setNameFilters(QStringList("*.*"));
    directory.setFilter(QDir::Files);
    for(auto& file : directory.entryList()){
        directory.remove(file);
    }
}
 
//=============================================================================================================
 
void FiffFileSharer::onDirectoryChanged(const QString &sPath)
{
    QString filePath(sPath + "/" + m_sDefaultFileName + QString::number(m_iFileIndex) + "_raw.fif");
    m_fileWatcher.addPath(filePath);
}
 
//=============================================================================================================
 
void FiffFileSharer::onFileChanged(const QString &sPath)
{
    emit newFileAtPath(sPath);
    m_fileWatcher.removePath(sPath);
 
    m_iFileIndex++;
}
 
//=============================================================================================================
 
bool FiffFileSharer::initSharedDirectory()
{
    QDir sharedDirectory(m_sDirectory);
    if(!sharedDirectory.exists()){
        sharedDirectory.mkpath(".");
    }
 
    return sharedDirectory.exists();
}