/*
 * Bittorrent Client using Qt and libtorrent.
 * Copyright (C) 2014  Vladimir Golovnev <glassez@yandex.ru>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 */

#ifndef ABSTRACTREQUESTHANDLER_H
#define ABSTRACTREQUESTHANDLER_H

#include <QString>
#include "httptypes.h"

class WebApplication;
struct WebSession;

class AbstractRequestHandler
{
    friend class WebApplication;

public:
    AbstractRequestHandler(
        const HttpRequest& request, const HttpEnvironment& env,
        WebApplication* app);

    HttpResponse run();

protected:
    virtual void processRequest() = 0;

    void status(uint code, const QString& text);
    void header(const QString& name, const QString& value);
    void print(const QString& text, const QString& type = CONTENT_TYPE_HTML);
    void print(const QByteArray& data, const QString& type = CONTENT_TYPE_HTML);
    void printFile(const QString& path);

    // Session management
    bool sessionActive() const { return session_ != 0; }
    void sessionInitialize();
    void sessionStart();
    void sessionEnd();

    // Ban management
    bool isBanned() const;
    int failedAttempts() const;
    void resetFailedAttempts();
    void increaseFailedAttempts();

    bool isAuthNeeded();

    // save data to temporary file on disk and return its name (or empty string if fails)
    static QString saveTmpFile(const QByteArray& data);

    inline WebSession* session() { return session_; }
    inline HttpRequest request() const { return request_; }
    inline HttpEnvironment env() const { return env_; }

private:
    WebApplication* app_;
    WebSession* session_;
    const HttpRequest request_;
    const HttpEnvironment env_;
    HttpResponse response_;

    void print_impl(const QByteArray& data, const QString& type);
};

#endif // ABSTRACTREQUESTHANDLER_H