#include "mainwindow.h"
#include <QComboBox>

using namespace std;

bool display = false;
//extern QDialog Configuration;
extern Ui::Configuration config;
extern bool testRsyncReturn(QProcess *);

QMap<int, QString> rsyncErrorStrings {
    {0, QTranslator::tr("Success. The rsync command completed successfully without any errors.")},
    {1, QTranslator::tr("Syntax or usage error. There was a problem with the syntax of the rsync command or with the options specified.")},
    {2, QTranslator::tr("Protocol incompatibility. There was a problem with the protocol version or negotiation between the rsync client and server.")},
    {3, QTranslator::tr("Errors selecting input/output files, dirs. There was a problem with the source or destination file or directory specified in the rsync command.")},
    {4, QTranslator::tr("Requested action not supported: An attempt was made to use an unsupported action or option.")},
    {5, QTranslator::tr("Error starting client-server protocol. There was an error starting the client-server protocol.")},
    {6, QTranslator::tr("Daemon unable to append to log-file. The rsync daemon was unable to write to its log file.")},
    {10, QTranslator::tr("Error in socket I/O. There was an error with the socket input/output.")},
    {11, QTranslator::tr("Error in file I/O. There was an error reading or writing to a file.")},
    {12, QTranslator::tr("Error in rsync protocol data stream. There was an error in the rsync protocol data stream.")},
    {13, QTranslator::tr("Errors with program diagnostics. There was an error generating program diagnostics.")},
    {14, QTranslator::tr("Error in IPC code. There was an error in the inter-process communication (IPC) code.")},
    {20, QTranslator::tr("Received SIGUSR1 or SIGINT. The rsync process was interrupted by a signal.")},
    {21, QTranslator::tr("Some error returned by waitpid(). An error occurred while waiting for a child process to complete.")},
    {22, QTranslator::tr("Error allocating core memory buffers. There was an error allocating memory buffers.")},
    {23, QTranslator::tr("Partial transfer due to error. The rsync command completed with an error, but some files may have been transferred successfully.")},
    {24, QTranslator::tr("Partial transfer due to vanished source files. Some source files disappeared before they could be transferred.")}
};


MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    QAbstractButton * reply;
    QMessageBox msgBox;
    ui->setupUi(this);

    QCoreApplication::setOrganizationName("RsyncUI");
    QCoreApplication::setApplicationName("RsyncUI");

    // context menu for treewidget (list of files)
    ui->treeWidget->addAction(ui->actionDownload);

    // init configuration window
    config.setupUi(&Configuration);

    // init of About
    this->about.description = tr("Client for rsync server\n\nYou click on file to enqueue it, and RyncUI Download one file a time");

    // connectors
    connect(this, &MainWindow::progressSignal, ui->progressBar, &QProgressBar::setValue);
    //connect(this, &MainWindow::errorSignal, this, &MainWindow::downloadingErrorSlot);
    connect(this, &MainWindow::stopDownloading, this, &MainWindow::cancelled);
    connect(config.buttonBox, SIGNAL(accepted()), this, SLOT(on_buttonBox_accepted()));
    connect(config.comboBox, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &MainWindow::on_comboBox_currentIndexChanged);

    // init of widgets
    ui->ktreewidgetsearchline->setTreeWidget(ui->treeWidget);               // attach search widget to treewidget
    ui->ktreewidgetsearchline->setCaseSensitivity(Qt::CaseInsensitive);     // and set it case insensitive
    ui->treeWidget->setHeaderLabels({tr("Path"), tr("Type"), tr("Size")} ); // set header of columns of tree widget

    // if last server exists in settings
    if (this->settings.contains("connexion/lastServer"))
    {
        // set window to precedent server/port configuration
        ui->portEdit->setText(this->settings.value("connexion/port").toString());
        ui->khistorycombobox->setCurrentText(this->settings.value("connexion/lastServer").toString());
    }else
    {
        ui->portEdit->text() = QString::number(this->connexion.port);
        ui->khistorycombobox->clear();
    }

    // setting arrowcursor for treeWidget, listWidget and listDownload to arrow
    ui->treeWidget->setCursor(Qt::ArrowCursor);
    ui->listWidget->setCursor(Qt::ArrowCursor);
    ui->listDownload->setCursor(Qt::ArrowCursor);

    // Hiding progress bar
    ui->progressBar->hide();

    loadSettings();

    //setting configuration window
    config.comboBox->setCurrentIndex(ui->toolBar->toolButtonStyle());       // setting combobox to saved settings

    //setting unit of bandwidth limit
    config.UnitCombobox->addItems({tr("KB"), tr("MB"), tr("GB"), tr("TB"), tr("PB")});

    //if exists list of donwloads in saved settings
    if (this->settings.value("Downloads/rows").toInt() != 0)
    {
        // asking if we load the list and continue downloading
        msgBox.setWindowTitle("RsyncUI");
        msgBox.setInformativeText(tr("A list of interrupted downloads exists, do you want to continue downloading ? if not the list will be cleared" ));

        QPushButton *yes = msgBox.addButton(QMessageBox::Yes);
        msgBox.addButton(QMessageBox::No);
        msgBox.setDefaultButton(QMessageBox::Yes);

        msgBox.exec();
        reply = msgBox.clickedButton();

        // if response is yes then loading list
        if(reply == yes)
        {
            loadDownloadList();
        }
    }
    // load list of services
    populateList();
}

MainWindow::~MainWindow()
{
    delete ui;
}

// Close window has been clicked
void MainWindow::closeEvent (QCloseEvent *event)
{
    QMessageBox::StandardButton reply;
    QMessageBox::StandardButtons param;
    QString displayText;

    // saving settings
    saveSettings();

    if (ui->listDownload->count() != 0)         // some downloads waiting
    {
        //  Asking for stopping or continuing
        param = QMessageBox::Yes|QMessageBox::No;
        if (config.autosaveCheckbox->checkState() != Qt::Checked)
        {
            param |= QMessageBox::Save;
            displayText = tr("Clicking Save button, You can save the list of downloads\n");
        }
        reply = QMessageBox::question(
                this,
                "RsyncUI",
                tr("Exiting will stop downloading, and will clear the download queue.\nDo you want to exit ?") + displayText,
                param,
                QMessageBox::No);

        if (reply == QMessageBox::No)
        {
            // continuing
            event->ignore();
            return;
        }else if(reply == QMessageBox::Yes)
        {
            // emission of signal to downloading thread and stopping
            emit (stopDownloading(this->downloading.process));
        }else
        {
            saveDownloadList();
        }
    }
    event->accept();
}

// Populate treeview with list of files
void MainWindow::populateTree(QTreeWidgetItem * parent)
{
    QString path;

    // Clear treewidget
    ui->treeWidget->clear();
    if (!this->connexion.server.isEmpty() and this->connexion.port > 0 and this->connexion.port < 65536)
    {
        // setting cursor to "Wait"
        QGuiApplication::setOverrideCursor(Qt::WaitCursor);

        // validating server's address
        if (validateServer(this->connexion.server))
        {
            // server is validated
            path = ui->listWidget->currentItem()->text().section('\n', 0,  0) + "/";
            scanDir(this->connexion.server, this->connexion.port, parent, path);
        }
        // Restoring cursor
        QGuiApplication::restoreOverrideCursor();
    }
}

// Populate Listview with list of services
void MainWindow::populateList()
{
    QString server;
    int port;

    server = ui->khistorycombobox->currentText();
    port = ui->portEdit->text().toUInt();
    if ((server != this->connexion.server) or (port != this->connexion.port))
    {
        // clearing listwidget
        ui->listWidget->clear();

        this->connexion.server = server;
        this->connexion.port = port;

        // setting cursor to "Wait"
        QGuiApplication::setOverrideCursor(Qt::WaitCursor);

        // verify if server is in history
        this->settings.beginGroup("connexion/server");
        if (this->settings.contains(server) and this->connexion.comboboxChanged)
        {
            // server is in history => setting port value
            port = this->settings.value(server).toUInt();
            ui->portEdit->setText(QString::number(port));
            this->connexion.port = port;

            //display list of services
            listServices();
        }else
        {
            if (!server.isEmpty() and (port > 0 and port < 65536))
            {
                if (validateServer(server))
                {
                    cout << server.toStdString() << endl;

                    // storing serverURL and port in settings
                    this->settings.setValue(server, port);
                    this->settings.sync();
                    this->downloading.server = server;

                    // storing in history of combobox
                    ui->khistorycombobox->addToHistory(server);

                    // load and display rsync services of the rsync server
                    listServices();
                }
            }
        }
        this->settings.endGroup();
        QGuiApplication::restoreOverrideCursor();  //setting cursor to default
    }
}

//list services of the rsync server
void MainWindow::listServices()
{
    QString cmd;
    QStringList param;
    QString line;
    QString errorRsync;
    QStringList v;
    QString service;
    QProcess *myProcess;
    bool flag = false;

    cmd  = "/usr/bin/rsync";
    param << "--contimeout=10" << "--port=" + QString::number(this->connexion.port) << this->connexion.server + "::";
    myProcess = new QProcess(this);
    myProcess->start(cmd, param);

    // waiting for response of the server with a timeout of 10 seconds
    while(myProcess->waitForReadyRead(10000))
    {
        while(!flag)
        {
            line = QString::fromUtf8(myProcess->readLine());
            // line empty then buffer is empty so returning to wait new datas
            if (line.isEmpty())
            {
                flag = true;
                break;
            }
            // extracting name and comment of the service
            v = line.split("\t");
            v[0].replace(" ", "");
            v[1].replace("\n", "");
            service = v[0] + "\n\t" + v[1];

            // adding to list of services
            ui->listWidget->addItem(service);
        }
        // buffer empty go to waiting new datas
        flag =false;
    }

    // verifying error code
    testRsyncReturn(myProcess);
}

// connect to rsync server to get list of files
void MainWindow::scanDir(QString server, int portN, QTreeWidgetItem *parent, QString path)
{
    QString cmd;
    QStringList param;
    QString line;
    QString size;
    QString filename;
    QTreeWidgetItem * item;
    QProcess * myProcess;
    bool isDir = false;
    bool flag = false;

    cmd = "rsync";
    param << "--contimeout=10" << "--port=" + QString::number(portN) << server + "::" + path;

    myProcess = new QProcess(this);
    myProcess->start(cmd, param);

    // waiting for response of the server with a timeout of 10 seconds
    while(myProcess->waitForReadyRead(100000))
    {
        while (!flag)
        {
            line = QString::fromUtf8(myProcess->readLine());
            // line empty then buffer is empty so returning to wait new datas
            if (line.isEmpty())
            {
                flag = true;
                break;
            }
            // extracting name, size and is dir/file
            line = line.simplified();
            size = line.section(" ", 1, 1);
            filename = line.section(" ", 4);
            if (filename != '.')
            {
                if (line[0] == "d")
                {
                    isDir = true;
                }else
                {
                    isDir = false;
                }
                if (parent != NULL)
                {
                    //adding item to tree
                    item = addTreeChild(parent, filename, size, isDir);
                }else
                {
                    //adding item to tree (as directory)
                    item = addTreeRoot(filename, size, isDir);
                }
            }
        }

        flag = false;
    }
    // buffer empty go to waiting new datas
    testRsyncReturn(myProcess);
}

// Verify if server address is IP address
bool MainWindow::isIpAddress(QString server)
{
    QStringList r;
    int elementN;
    bool ok;

    r = server.split('.');
    if (r.size() == 4)
    {
        for (auto element : r)
        {
            elementN = element.toInt(&ok);
            if (elementN < 0 or elementN > 255 or ok == false)
            {
                return false;
            }
        }
        return true;
    }else
    {
        return false;
    }
}

// validate address server
bool MainWindow::validateServer(QString server)
{
    QString cmd;
    QStringList param;
    QString line;
    QProcess * myProcess;
    bool flag = false;
    bool bflag = false;

    cmd = "dig";
    param << server;

    myProcess = new QProcess(this);
    myProcess->start(cmd, param);

    // maiking a dig on the server's address
    while(myProcess->waitForReadyRead())
    {
        while (!bflag)
        {
            line = QString::fromUtf8(myProcess->readAllStandardOutput());
            // line empty then buffer is empty so returning to wait new datas
            if (line.isEmpty())
            {
                bflag = true;
                break;
            }else if (line.indexOf(";; ANSWER SECTION:") != -1)
            {
                flag = true;
            }
        }
        bflag = false;
    }

    //testRsyncReturn(myProcess);

    if ( flag == false)
    {
        //server's address is not valid testing if ip address is valid
        flag = isIpAddress(server);
    }
    if ( flag == false)
    {
        // server-s address not valid
        QMessageBox::warning(
            this,
            "RsyncUI",
            tr("server does not exists" )
        );
    }
    return flag;
}

// slot activated when combobox is changed
void MainWindow::on_khistorycombobox_currentIndexChanged(int i)
{
    this->connexion.comboboxChanged = true;
    populateList();
}

// slot activated when button connection is clicked
void MainWindow::on_connectButton_clicked()
{
   populateList();
}

// add a dir in treeview
QTreeWidgetItem * MainWindow::addTreeRoot(QString name, QString fileSize, bool isDir)
{
    QTreeWidgetItem *treeItem = new QTreeWidgetItem(ui->treeWidget);

    if (isDir == true)
    {
        // item is a dir
        treeItem->setText(1, tr("Dir"));
    }else
    {
        // item is a file
        treeItem->setText(1,tr("File"));
    }
    treeItem->setText(0, name);
    treeItem->setText(2, fileSize);

    return treeItem;
}

// add a file in treeview
QTreeWidgetItem * MainWindow::addTreeChild(QTreeWidgetItem *parent, QString name, QString fileSize, bool isDir)
{
    QTreeWidgetItem *treeItem = new QTreeWidgetItem();

    if (isDir == true)
    {
        // item is a dir
        treeItem->setText(1, tr("Dir"));
    }else
    {
        // item is a file
        treeItem->setText(1,("File"));
    }
    treeItem->setText(0, name);
    treeItem->setText(2, fileSize);

    // QTreeWidgetItem::addChild(QTreeWidgetItem * child)
    parent->addChild(treeItem);
    return treeItem;
}

// Slot acivated when a service in the list is clicked
void MainWindow::on_listWidget_clicked()
{
    QString str;

    this->connexion.service = ui->listWidget->currentItem()->text().section("\n", 0 ,0);
    str = "Folder/" + this->connexion.server + "/" + this->connexion.service;
    // if service exists in settings for this server
    if (this->settings.contains(str))
    {
        // setting savePath from settings
        this->downloading.savePath = this->settings.value(str).toString();
    }
    populateTree(NULL);
}

//Slot activated when a file is clicked in the treeview
void MainWindow::on_treeWidget_itemClicked(QTreeWidgetItem *item, bool downloadDir)
{
    QFuture<void> future;
    QFileDialog dialog;
    QTreeWidgetItem * itemR;
    QString path;
    QString str;

    itemR = item;

    // assembling path from treewidget
    path = item->text(0);
    while(itemR->parent() != NULL)
    {
        itemR = itemR->parent();
        // concatening parent to path
        path.prepend(itemR->text(0) + "/");
    };

    if (item->text(1) == tr("File") or downloadDir == true)
    {
        // Item is a file
        if(ui->listDownload->findItems(path, Qt::MatchStartsWith).empty())
        {
            // exists saving path in settings ?
            str = "Folder/" + this->connexion.server + "/" + this->downloading.service;
            if(!this->settings.contains(str))
            {
                // saving path do not exists, asking for it
                if(!on_DefaultSaveFolder_triggered())
                {
                    cout << "no directory selectioned, ignoring download request";
                    return;
                }
            }

            // is there a downloading process ?
            if (this->downloading.process == nullptr)
            {
                // no downloading process launching it
                this->downloading.path = path;
                this->downloading.server = this->connexion.server;
                this->downloading.service = this->connexion.service;
                startDownloading();
                // wit 1 second to process start
                //sleep(1);
            }

            // Adding download in download list
            str = path + " => " + this->connexion.server + "/" + this->connexion.service;
            ui->listDownload->addItem(str);
        }
    }else
    {
        //Item is a Directory
        scanDir(this->connexion.server, this->connexion.port, item,  this->connexion.service + "/" + path +"/");
        item->setExpanded(true);
    }
    if (config.autosaveCheckbox->checkState() == Qt::Checked)
    {
        saveDownloadList();
    }
}

// Launch the thread which download the file
void MainWindow::startDownloading()
{
    ui->progressBar->setValue(0);
    ui->progressBar->show();

    //QtConcurrent::run(&this->downloadO, &downloadFile::download, this);
    download();
}

// Slot stopping download
void MainWindow::stoppingDownload()
{
    emit (stopDownloading(this->downloading.process));
}

// when download is finished, launch download of next file in queue
void MainWindow::downloadFinished(int exitCode, QProcess::ExitStatus exitStatus)
{
    QString path;
    QString str;
    int pos;

    // test if process crashed
    if (exitStatus == QProcess::CrashExit)
    {
        QMessageBox::warning(
            NULL,
            "RsyncUI",
            tr("Rsync process crashed"));
    }
    //test result code of command (if 20 then command stopped by user)
    if (exitCode != 0 and exitCode != 20)
    {
        // displaying warning with exit code
        QMessageBox::warning(
            NULL,
            "RsyncUI",
            rsyncErrorStrings[exitCode]);
    }

    // disconnecting signals to slots
    disconnect(this->downloading.process, 0, 0, 0);

    // reset variables and window
    this->downloading.process= nullptr;
    ui->progressBar->hide();
    delete ui->listDownload->takeItem(0);
    this->downloading.clear();

    // Some downloads staying in queue
    if (ui->listDownload->count() != 0)
    {
        // autosave is activated
        if (config.autosaveCheckbox->checkState() == Qt::Checked)
        {
            // saving download list
            saveDownloadList();
        }

        // initializing download
        path = ui->listDownload->item(0)->text();
        pos = path.lastIndexOf("/");
        this->downloading.service = path.midRef(pos+1).toString();
        path.resize(pos);
        pos = path.lastIndexOf(" => ");
        this->downloading.server = path.midRef(pos+4).toString();
        path.resize(pos);
        this->downloading.path = path;

        // save path exists in settings ?
        str = "Folder/" + this->downloading.server + "/" + this->downloading.service;
        if (this->settings.contains(str))
        {
            // setting savepath from saved settings
            this->downloading.savePath = this->settings.value(str).toString();
            startDownloading();
        }else
        {
            // no save path
            if(!on_DefaultSaveFolder_triggered())
            {
                cout << "Error no save path so deleting download";
                //downloadFinished();
                return;
            }
        }
    }
}


// Slot activated when a line is clicked in queue list
void MainWindow::on_listDownload_itemClicked(QListWidgetItem *item)
{
    QMessageBox::StandardButton reply;

    if (item->listWidget()->row(item) == 0)
    {
        // first line clicked on download list
        reply = QMessageBox::question(
                this,
                "RsyncUI",
                tr("Do you want to stop downloading and delete this file from download queue ?"),
                QMessageBox::Yes|QMessageBox::No,
                QMessageBox::No);
        if (reply == QMessageBox::Yes)
        {
            // stopping download
            emit (stopDownloading(this->downloading.process));
        }
    }else
    {
        // not first line on download list
        reply = QMessageBox::question(
                this,
                "RsyncUI",
                tr("Do you want to delete this file from download queue ?"),
                QMessageBox::Yes|QMessageBox::No,
                QMessageBox::No);
        if (reply == QMessageBox::Yes)
        {
            // removing line from download list
            ui->listDownload->removeItemWidget(item);
            delete item;
            if (config.autosaveCheckbox->checkState() == Qt::Checked)
            {
                // autosave acivated,so saving download list
                saveDownloadList();
            }
        }
    }
}

// load settings
void MainWindow::loadSettings()
{
    // restoring geometry and state of window and widgets
    this->restoreGeometry(this->settings.value("window/geometry").toByteArray());
    this->restoreState(this->settings.value("window/state").toByteArray());
    ui->treeWidget->header()->restoreState(this->settings.value("treeWidget/state").toByteArray());
    ui->splitter->restoreState(this->settings.value("splitter/state").toByteArray());
    ui->splitter_2->restoreState(this->settings.value("splitter2/state").toByteArray());
    ui->toolBar->setToolButtonStyle((Qt::ToolButtonStyle)this->settings.value("toolbar/state").toInt());
    if (this->settings.value("Autosave").toInt() == Qt::Checked)
    {
        this->config.autosaveCheckbox->setChecked(true);
    }
    // loading connexion settings
    // loading servers history
    this->settings.beginGroup("connexion/server");
    QStringList servers = this->settings.allKeys();
    this->settings.endGroup();
    for( const QString &server : servers )
    {
        ui->khistorycombobox->addToHistory(server);
    }

    // loading save path
    this->downloading.savePath = this->settings.value("Folder").toString();

    // loading bandwidth limit
    this->connexion.bandwidthLimit = this->settings.value("bandwidthlimit").toUInt();
    this->connexion.bandwidthLimitUnit = this->settings.value("bandwidthlimitunit").toInt();
}

// save settings
void MainWindow::saveSettings()
{
    this->settings.setValue("window/geometry", saveGeometry());
    this->settings.setValue("window/state", saveState());
    this->settings.setValue("treeWidget/state", ui->treeWidget->header()->saveState());
    this->settings.setValue("splitter/state", ui->splitter->saveState());
    this->settings.setValue("splitter2/state", ui->splitter_2->saveState());
    this->settings.setValue("connexion/lastServer", this->connexion.server);
    this->settings.setValue("connexion/lastPort", QString::number(this->connexion.port));
    this->settings.setValue("toolbar/state", ui->toolBar->toolButtonStyle());
    this->settings.setValue("Autosave", this->config.autosaveCheckbox->checkState());
    this->settings.sync();
}

// About
void MainWindow::on_actionAbout_triggered()
{
    QString text =  this->about.description + "\n\n" +
                    tr("Version") + ":     " + this->about.version + "\n" +
                    tr("Licence") + ":     " + this->about.licence + "\n" +
                    tr("Author") + ":      " + this->about.author + "\n" +
                    tr("EMail") + ":      " + this->about.email + "\n" +
                    tr("Source code") + ": " + this->about.git;
    QMessageBox::about(this, this->about.title, text);
}

// About QT
void MainWindow::on_actionAbout_Qt_triggered()
{
    QMessageBox::aboutQt(this);
}

// Activated when menu "change folder" is clicked
bool MainWindow::on_DefaultSaveFolder_triggered()
{
     QFileDialog dialog;
     QString folder;
     QString path;

     // if service not selected display a message
     if (this->connexion.service.isEmpty())
     {
        QMessageBox::warning(
                NULL,
                "RsyncUI",
                tr("Since the save path is linked to service, you need to select a service before you can select a folder"));
                return false;
     }

     // Asking for directory to save files
     path =  dialog.getExistingDirectory(this, tr("Choose folder where to save file"), QDir::homePath(), QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
     if (!path.isEmpty())
     {
        this->downloading.savePath = path;
        if (!this->connexion.service.isEmpty() and !this->connexion.server.isEmpty())
        {
            // saving save path in settings
            folder = "Folder/" + this->connexion.server + "/" + this->connexion.service;
            this->settings.setValue(folder, this->downloading.savePath);
            this->settings.sync();
        }
     }else
     {
         return false;
     }
     return true;
}

// Activated when menu "settings" is clicked
void MainWindow::on_action_Settings_triggered()
{
    config.UnitCombobox->setCurrentIndex(this->connexion.bandwidthLimitUnit);
    config.spinBox->setValue(this->connexion.bandwidthLimit);
    Configuration.show();
}

// Acivated when "Ok" is clicked in Configuration window
void MainWindow::on_buttonBox_accepted()
{
    QString unit;
    QString bw;

    bw = config.spinBox->text();
    if (bw.toInt() == 0)
    {
        // bandwidth = 0
        this->connexion.bandwidthLimit = 0;
        this->connexion.bandwidthLimitUnit = 0;
    }else
    {
        this->connexion.bandwidthLimit = config.spinBox->value();
        this->connexion.bandwidthLimitUnit = config.UnitCombobox->currentIndex();
    }
    this->settings.setValue("bandwidthlimit", this->connexion.bandwidthLimit);
    this->settings.setValue("bandwidthlimitunit", this->connexion.bandwidthLimitUnit);

    this->settings.setValue("Autosave", this->config.autosaveCheckbox->checkState());

    this->settings.sync();
    Configuration.hide();
}

// Saving download list
void MainWindow::saveDownloadList()
{
    int nRows;

    // remove list of downloads
    this->settings.remove("Downloads/");

    // Saving list of current downloads
    nRows = ui->listDownload->count();
    this->settings.beginGroup("Downloads");
    this->settings.setValue("rows", nRows);
    for (int i = 0; i < nRows; i++)
    {
        this->settings.setValue(QString::number(i), ui->listDownload->item(i)->text());
    }
    this->settings.endGroup();
    this->settings.sync();
}

// Loading download list
void MainWindow::loadDownloadList()
{
    QString path;
    QString str;
    int pos;

    this->settings.sync();
    this->settings.beginGroup("Downloads");
    int size = this->settings.value("rows").toInt();
    for (int i = 0; i < size; ++i)
    {
        ui->listDownload->addItem(this->settings.value(QString::number(i)).toString());
    }
    this->settings.endGroup();

    path = ui->listDownload->item(0)->text();
    pos = path.lastIndexOf("/");
    this->downloading.service = path.midRef(pos+1).toString();
    path.resize(pos);
    pos = path.lastIndexOf(" => ");
    this->downloading.server = path.midRef(pos+4).toString();
    path.resize(pos);
    this->downloading.path = path;
    str = "Folder/" + this->downloading.server + "/" + this->downloading.service;
    if (this->settings.contains(str))
    {
        this->downloading.savePath = this->settings.value(str).toString();
    }
    startDownloading();
}

// clear object downloading
void Downloading::clear()
{
    this->path.clear();
    this->server.clear();
    this->savePath.clear();
    this->service.clear();
}

// Context menu of file list clicked
void MainWindow::on_actionDownload_triggered()
{
    // action made in qt-designer and added in init function.
    QTreeWidgetItem *item;
    item = ui->treeWidget->currentItem();
    on_treeWidget_itemClicked(item, true);
}

/*void MainWindow::downloadingErrorSlot(QString errorString)
{
    QMessageBox::warning(
                       this,
                       "RsyncUI",
                       errorString,
                       QMessageBox::Ok,
                       QMessageBox::Ok);
}
*/

// Chnage toolbar style
void MainWindow::on_comboBox_currentIndexChanged(int index)
{
    ui->toolBar->setToolButtonStyle((Qt::ToolButtonStyle)index);
}