publishingengine.h

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/*     -*-C++-*- -*-coding: utf-8-unix;-*-
    Classified Ads is Copyright (c) Antti Järvinen 2013.

    This file is part of Classified Ads.

    Classified Ads is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    Classified Ads 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with Classified Ads; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/



#ifndef PUBLISHING_ENG_H
#define PUBLISHING_ENG_H

#include <QHostAddress>
#include <QPair>
#include "connection.h" // for ConnectionObserver
#include "../controller.h"
#include "../datamodel/model.h"

class PublishingEngine : public QTimer {
    Q_OBJECT
public:
    PublishingEngine(Controller* aController,
                     Model& aModel ) ;
    ~PublishingEngine() ;
signals:
    void error(QTcpSocket::SocketError socketError);
public slots:
    void nodeConnectionAttemptStatus(Connection::ConnectionState aStatus,
                                     const Hash aHashOfAttemptedNode );
    void run();
private:
    void emptyNodeCandidateList() ;
    void askConnectionsForNodesOnPublishList() ;
    enum StageOfPublish {
        InitialStage,
        AwaitingConnection
    } ;
    void sendPublishItemToAlreadyConnectedNodes() ;
    void publishToNode(const Hash& aNode) ;
    void checkForSuccessfullyConnectedNodes() ;
    void checkForUnSuccessfullyConnectedNodes() ;
public:
    bool iNeedsToRun ;
private: // data
    Controller* iController ; 
    Model &iModel ; 
    PublishItem iWorkItem ; 
    QList<Node *> iNodeCandidatesToTryPush ;
    QList<Hash> iNodesSuccessfullyConnected ;
    QList<Hash> iNodesFailurefullyConnected ;
    StageOfPublish iStageOfPublish ;
    bool iNowRunning ;
} ;
#endif