FileExchange_Android.h

/***************************************************************************
 *   Copyright (C) 2019-2025 by Stefan Kebekus                             *
 *   stefan.kebekus@gmail.com                                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
 
#pragma once
 
#include "platform/FileExchange_Abstract.h"
 
namespace Platform {

 
 
class FileExchange : public Platform::FileExchange_Abstract
{
    Q_OBJECT
    QML_ELEMENT
    QML_SINGLETON
 
public:
    explicit FileExchange(QObject *parent = nullptr);
 
    // No default constructor, important for QML singleton
    explicit FileExchange() = delete;
 
    // factory function for QML singleton
    static Platform::FileExchange* create(QQmlEngine* /*unused*/, QJSEngine* /*unused*/)
    {
        return GlobalObject::fileExchange();
    }
 
    ~FileExchange() override = default;
 
 
    //
    // Methods
    //

    void importContent() override;

    QString shareContent(const QByteArray& content, const QString& mimeType, const QString& fileNameSuffix, const QString& fileNameTemplate) override;

    QString viewContent(const QByteArray& content, const QString& mimeType, const QString& fileNameSuffix, const QString& fileNameTemplate) override;

    void saveContent(const QByteArray& content, const QString& mimeType, const QString& fileNameSuffix, const QString& fileNameTemplate) override;

    Q_INVOKABLE static void openFilePicker(const QString& mimeType);
 
public slots:
    void onGUISetupCompleted() override;

    void processFileOpenRequest(const QString& path, const QString& unmingledFilename) override;

    void onCreateFileResult(const QString& uriString);
 
 
private:
    Q_DISABLE_COPY_MOVE(FileExchange)
 
    // Helper function. Saves content to a file in a directory from where
    // sharing to other android apps is possible
    auto contentToTempFile(const QByteArray& content, const QString& fileNameTemplate) -> QString;
 
    // Name of a subdirectory within the AppDataLocation for sending and
    // receiving files.
    QString fileExchangeDirectoryName;
 
    // @returns True if an app could be started, false if no app was found
    static bool outgoingIntent(const QString& methodName, const QString& filePath, const QString& mimeType);
 
    bool receiveOpenFileRequestsStarted {false};
    QString pendingReceiveOpenFileRequest;
    QString pendingReceiveOpenFileRequestUnmingledName;
 
    // Content waiting to be written once the 'create document' dialog opened
    // by saveContent() reports its result.
    QByteArray pendingSaveContent;
    bool savePending {false};
};
 
} // namespace Platform