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  **
  ** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
  ** Contact: https://www.qt.io/licensing/
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  ** This file is part of the Qt3D module of the Qt Toolkit.
  **
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  ** Licensees holding valid commercial Qt licenses may use this file in
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  #ifndef QT3DCORE_QDOWNLOADHELPERSERVICE_P_H
  #define QT3DCORE_QDOWNLOADHELPERSERVICE_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists for the convenience
  // of other Qt classes.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <QSharedPointer>
  #include <QObject>
  #include <QUrl>
  
  #include <Qt3DCore/qaspectjob.h>
  #include <Qt3DCore/qt3dcore_global.h>
  #include <Qt3DCore/private/qservicelocator_p.h>
  
  QT_BEGIN_NAMESPACE
  
  class QThread;
  class QNetworkAccessManager;
  class QNetworkReply;
  
  namespace Qt3DCore {
  
  class QAspectEngine;
  class QDownloadNetworkWorker;
  class QDownloadHelperService;
  class QDownloadHelperServicePrivate;
  
  class QT3DCORESHARED_EXPORT QDownloadRequest
  {
  public:
      QDownloadRequest(const QUrl &url);
      virtual ~QDownloadRequest();
  
      QUrl url() const { return m_url; }
      bool succeeded() const { return m_succeeded; }
      bool cancelled() const { return m_cancelled; }
  
      virtual void onDownloaded();         // this is called in dl thread
      virtual void onCompleted() = 0;      // this is called in the aspect thread
  
  protected:
      QUrl m_url;
      QByteArray m_data;
  
  private:
      friend class QDownloadNetworkWorker;
      friend class QDownloadHelperService;
      bool m_succeeded;
      bool m_cancelled;
  };
  
  typedef QSharedPointer<QDownloadRequest> QDownloadRequestPtr;
  
  
  class QT3DCORESHARED_EXPORT QDownloadHelperService : public QAbstractServiceProvider
  {
      Q_OBJECT
  public:
      explicit QDownloadHelperService(const QString &description = QString());
      ~QDownloadHelperService();
  
      void submitRequest(const QDownloadRequestPtr &request);
      void cancelRequest(const QDownloadRequestPtr &request);
      void cancelAllRequests();
  
      static QString urlToLocalFileOrQrc(const QUrl &url);
      static bool isLocal(const QUrl &url);
      static QDownloadHelperService *getService(QAspectEngine *engine);
  
  private:
      Q_DECLARE_PRIVATE(QDownloadHelperService)
      Q_PRIVATE_SLOT(d_func(), void _q_onRequestCompleted(const Qt3DCore::QDownloadRequestPtr &))
  };
  
  typedef QSharedPointer<QDownloadHelperService> QDownloadHelperServicePtr;
  
  } // namespace Qt3DCore
  
  QT_END_NAMESPACE
  
  Q_DECLARE_METATYPE(Qt3DCore::QDownloadRequestPtr) // LCOV_EXCL_LINE
  
  #endif // QT3DCORE_QDOWNLOADHELPERSERVICE_P_H
  