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// Copyright © 2010-2012 b0ris
//.
// 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 2
// 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.
#ifndef UPDATED_CONFIG_H
#define UPDATED_CONFIG_H
#include <QObject>
#include "Config.h"
#include "SslClient.h"
class QTimer;
/**
* @brief singleton class that can update it's configuration<br/>
* -# ServerEntry is read from servers list
* -# Trying to connect every Config::ServerEntry::retryTimeout
* -# When total time for all retries exceeds Config::ServerEntry::timeout go to the next ServerEntry
*/
class UpdatedConfig: public QObject, public Config
{
Q_OBJECT
public:
/**
* @brief Retrieve application-wide instance of Config class
* @return Pointer to singleton instance of Config class
*/
static UpdatedConfig *CurrentConfig();
/**
* @brief Get valid server address to communicate with
* @return address of server to communicate with ot empty string
*/
string GetServerAddr();
signals:
/**
* @brief Signal is emitted when client configuration is updated
*/
void updated();
private slots:
void update();
void connectionError();
void gotServerReply(SslClient::RequestType &type, QByteArray &confdata);
private:
static const int UPDATED_STATE_FULL = 0x7E;
/**
* @brief Pointer to the singleton Config instance
*/
static UpdatedConfig *self;
/**
* @brief SslClient instance that connects to server and retrieves config
*/
SslClient *client;
/**
* @brief timer that is responsible on config updates and reconnection retries
*/
QTimer *configUpdateTimer;
/**
* @brief bool value that is true if config is actual and was updated recently<br/>
* and false if it isn't actual and has to be updated
*/
bool configValid;
/**
* @brief Count time between subsequent request retries
*/
unsigned time;
/**
* @brief index of Config::servers that is currently being tried to connect or being worked with
*/
unsigned activeSrvIndex;
/**
* @brief value indicating whether last connetion attempt failed or not
*/
bool retryFailed;
/**
* @brief value indicating which config parts are already updated<br/>
* to check if some part is updated just apply & to this<br/>
* value and any of SslClient::RequestType values
*/
unsigned char updateStatus;
/**
* @brief creates an instance and tries to connect to servers from config.cfg<br/>
* one by one until working server is found or no other ServerEntry records left
*/
UpdatedConfig();
};
#endif
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