#include "filesaver.h"


// Qt
#include <QtConcurrent/QtConcurrent>
#include <QFuture>

// Project
#include "filehandler.h"


using namespace Storage;

FileSaver::FileSaver(QObject *parent) : QObject(parent)
{
    connect(&_futureWatcher, SIGNAL(finished()),
            this           , SLOT(onFileSaved()));
}

/**
 * @brief FileSaver::concurrentSave
 * @param filename (QString) contains the path to the file to be written to
 * @param content (QString) the content to write to the file
 * @param append (bool) if True, append the content. Otherwise, overwrite it
 * @return (int) the job ID number, emitted by this class once the file has been saved
 */
void FileSaver::concurrentSave(const QString &filename, const QString &content, bool append)
{
    QFuture<bool> future  = QtConcurrent::run(&FileHandler::write, filename, content, append);
    _futureWatcher.setFuture(future);
}

/**
 * @brief FileSaver::onFileSaved
 *  Emits a QPair<bool, int>, true if the save was succesful and the job id of the file that has been saved
 */
void FileSaver::onFileSaved()
{
    emit fileSaved(_futureWatcher.result());
}