QXmppFileSharingProvider.h

// SPDX-FileCopyrightText: 2022 Jonah Brüchert <jbb@kaidan.im>
// SPDX-FileCopyrightText: 2022 Linus Jahn <lnj@kaidan.im>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#ifndef QXMPPFILESHARINGPROVIDER_H
#define QXMPPFILESHARINGPROVIDER_H
 
#include "QXmppError.h"
#include "QXmppGlobal.h"
 
#include <any>
#include <functional>
#include <memory>
#include <variant>
 
class QIODevice;
class QXmppFileMetadata;
class QXmppUpload;
class QXmppDownload;

class QXMPP_EXPORT QXmppFileSharingProvider
{
public:
    using DownloadResult = std::variant<QXmpp::Success, QXmpp::Cancelled, QXmppError>;

    using UploadResult = std::variant<std::any /* source */, QXmpp::Cancelled, QXmppError>;

    class Download
    {
    public:
        virtual ~Download() = default;
        virtual void cancel() = 0;
    };

    class Upload
    {
    public:
        virtual ~Upload() = default;
        virtual void cancel() = 0;
    };

    virtual ~QXmppFileSharingProvider() = default;

    virtual auto downloadFile(const std::any &source,
                              std::unique_ptr<QIODevice> target,
                              std::function<void(quint64, quint64)> reportProgress,
                              std::function<void(DownloadResult)> reportFinished) -> std::shared_ptr<Download> = 0;

    virtual auto uploadFile(std::unique_ptr<QIODevice> source,
                            const QXmppFileMetadata &info,
                            std::function<void(quint64, quint64)> reportProgress,
                            std::function<void(UploadResult)> reportFinished) -> std::shared_ptr<Upload> = 0;
};
 
#endif  // QXMPPFILESHARINGPROVIDER_H