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#include "qquickwebenginedownloaditem_p.h"
#include "qquickwebenginedownloaditem_p_p.h"
#include "qquickwebengineprofile_p.h"

using QtWebEngineCore::BrowserContextAdapterClient;

QT_BEGIN_NAMESPACE

static inline QQuickWebEngineDownloadItem::DownloadState toDownloadState(int state) {
    switch (state) {
    case BrowserContextAdapterClient::DownloadInProgress:
        return QQuickWebEngineDownloadItem::DownloadInProgress;
    case BrowserContextAdapterClient::DownloadCompleted:
        return QQuickWebEngineDownloadItem::DownloadCompleted;
    case BrowserContextAdapterClient::DownloadCancelled:
        return QQuickWebEngineDownloadItem::DownloadCancelled;
    case BrowserContextAdapterClient::DownloadInterrupted:
        return QQuickWebEngineDownloadItem::DownloadInterrupted;
    default:
        Q_UNREACHABLE();
        return QQuickWebEngineDownloadItem::DownloadCancelled;
    }
}

QQuickWebEngineDownloadItemPrivate::QQuickWebEngineDownloadItemPrivate(QQuickWebEngineProfile *p)
    : profile(p)
    , downloadId(-1)
    , downloadState(QQuickWebEngineDownloadItem::DownloadCancelled)
    , totalBytes(-1)
    , receivedBytes(0)
{
}

QQuickWebEngineDownloadItemPrivate::~QQuickWebEngineDownloadItemPrivate()
{
    if (profile)
        profile->d_ptr->downloadDestroyed(downloadId);
}

/*!
    \qmltype WebEngineDownloadItem
    \instantiates QQuickWebEngineDownloadItem
    \inqmlmodule QtWebEngine
    \since QtWebEngine 1.1
    \brief Provides information about a download.

    Stores the state of a download to be used to manage requested downloads.

    By default, the download is rejected unless the user explicitly accepts it with
    WebEngineDownloadItem::accept().
*/

void QQuickWebEngineDownloadItemPrivate::update(const BrowserContextAdapterClient::DownloadItemInfo &info)
{
    Q_Q(QQuickWebEngineDownloadItem);

    updateState(toDownloadState(info.state));

    if (info.receivedBytes != receivedBytes) {
        receivedBytes = info.receivedBytes;
        Q_EMIT q->receivedBytesChanged();
    }

    if (info.totalBytes != totalBytes) {
        totalBytes = info.totalBytes;
        Q_EMIT q->totalBytesChanged();
    }
}

void QQuickWebEngineDownloadItemPrivate::updateState(QQuickWebEngineDownloadItem::DownloadState newState)
{
    Q_Q(QQuickWebEngineDownloadItem);

    if (downloadState != newState) {
        downloadState = newState;
        Q_EMIT q->stateChanged();
    }
}

/*!
    \qmlmethod void WebEngineDownloadItem::accept()

    Accepts the download request, which will start the download.

   \sa WebEngineDownloadItem::cancel()
*/

void QQuickWebEngineDownloadItem::accept()
{
    Q_D(QQuickWebEngineDownloadItem);

    if (d->downloadState != QQuickWebEngineDownloadItem::DownloadRequested)
        return;

    d->updateState(QQuickWebEngineDownloadItem::DownloadInProgress);
}

/*!
    \qmlmethod void WebEngineDownloadItem::cancel()

    Cancels the download.
*/

void QQuickWebEngineDownloadItem::cancel()
{
    Q_D(QQuickWebEngineDownloadItem);

    QQuickWebEngineDownloadItem::DownloadState state = d->downloadState;

    if (state == QQuickWebEngineDownloadItem::DownloadCompleted
            || state == QQuickWebEngineDownloadItem::DownloadCancelled)
        return;

    d->updateState(QQuickWebEngineDownloadItem::DownloadCancelled);

    // We directly cancel the download if the user cancels before
    // it even started, so no need to notify the profile here.
    if (state == QQuickWebEngineDownloadItem::DownloadInProgress) {
        if (d->profile)
            d->profile->d_ptr->cancelDownload(d->downloadId);
    }
}

/*!
    \qmlproperty int WebEngineDownloadItem::id

    Holds the download item's ID.
*/

quint32 QQuickWebEngineDownloadItem::id() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->downloadId;
}

/*!
    \qmlproperty enumeration WebEngineDownloadItem::state

    Describes the state of the download:

    \value  WebEngineDownloadItem.DownloadRequested
            Download has been requested, but it has not been accepted yet.
    \value  WebEngineDownloadItem.DownloadInProgress
            Download is in progress.
    \value  WebEngineDownloadItem.DownloadCompleted
            Download completed successfully.
    \value  WebEngineDownloadItem.DownloadInterrupted
            Download has been interrupted (by the server or because of lost connectivity).
*/

QQuickWebEngineDownloadItem::DownloadState QQuickWebEngineDownloadItem::state() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->downloadState;
}

/*!
    \qmlproperty int WebEngineDownloadItem::totalBytes

    Holds the total amount of data to download in bytes.

    \c -1 means the total size is unknown.
*/

qint64 QQuickWebEngineDownloadItem::totalBytes() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->totalBytes;
}

/*!
    \qmlproperty int WebEngineDownloadItem::receivedBytes

    Holds the amount of data in bytes that has been downloaded so far.
*/

qint64 QQuickWebEngineDownloadItem::receivedBytes() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->receivedBytes;
}

/*!
    \qmlproperty string WebEngineDownloadItem::mimeType
    \since QtWebEngine 1.2

    Holds the MIME type of the download.
*/

QString QQuickWebEngineDownloadItem::mimeType() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->mimeType;
}

/*!
    \qmlproperty string WebEngineDownloadItem::path

    Holds the full target path where data is being downloaded to.

    The path includes the file name. The default suggested path is the standard
    download location and file name is deduced not to overwrite already existing files.

    The download path can only be set in the \c WebEngineProfile.onDownloadRequested
    handler before the download is accepted.

    \sa WebEngineProfile::downloadRequested(), accept()
*/

QString QQuickWebEngineDownloadItem::path() const
{
    Q_D(const QQuickWebEngineDownloadItem);
    return d->downloadPath;
}

void QQuickWebEngineDownloadItem::setPath(QString path)
{
    Q_D(QQuickWebEngineDownloadItem);
    if (d->downloadState != QQuickWebEngineDownloadItem::DownloadRequested) {
        qWarning("Setting the download path is not allowed after the download has been accepted.");
        return;
    }
    if (d->downloadPath != path) {
        d->downloadPath = path;
        Q_EMIT pathChanged();
    }
}

QQuickWebEngineDownloadItem::QQuickWebEngineDownloadItem(QQuickWebEngineDownloadItemPrivate *p, QObject *parent)
    : QObject(parent)
    , d_ptr(p)
{
    p->q_ptr = this;
}

QQuickWebEngineDownloadItem::~QQuickWebEngineDownloadItem()
{
}

QT_END_NAMESPACE
