nheko/src/JdenticonProvider.h

// SPDX-FileCopyrightText: 2021 Nheko Contributors
//
// SPDX-License-Identifier: GPL-3.0-or-later

#pragma once

#include <QImage>
#include <QQuickAsyncImageProvider>
#include <QQuickImageResponse>
#include <QThreadPool>

#include <mtx/common.hpp>

#include "jdenticoninterface.h"

namespace Jdenticon {
JdenticonInterface *
getJdenticonInterface();
}

class JdenticonResponse
  : public QQuickImageResponse
  , public QRunnable
{
public:
    JdenticonResponse(const QString &key, bool crop, double radius, const QSize &requestedSize);

    QQuickTextureFactory *textureFactory() const override
    {
        return QQuickTextureFactory::textureFactoryForImage(m_pixmap.toImage());
    }

    void run() override;

    QString m_key;
    bool m_crop;
    double m_radius;
    QSize m_requestedSize;
    QPixmap m_pixmap;
    JdenticonInterface *jdenticonInterface_ = nullptr;
};

class JdenticonProvider
  : public QObject
  , public QQuickAsyncImageProvider
{
    Q_OBJECT

public:
    static bool isAvailable() { return Jdenticon::getJdenticonInterface() != nullptr; }

public slots:
    QQuickImageResponse *requestImageResponse(const QString &id,
                                              const QSize &requestedSize) override
    {
        auto id_      = id;
        bool crop     = true;
        double radius = 0;

        auto queryStart = id.lastIndexOf('?');
        if (queryStart != -1) {
            id_            = id.left(queryStart);
            auto query     = id.midRef(queryStart + 1);
            auto queryBits = query.split('&');

            for (auto b : queryBits) {
                if (b.startsWith("radius=")) {
                    radius = b.mid(7).toDouble();
                }
            }
        }

        JdenticonResponse *response = new JdenticonResponse(id_, crop, radius, requestedSize);
        pool.start(response);
        return response;
    }

private:
    QThreadPool pool;
};