/*
 * edbflatfile.h - asynchronous I/O event database
 * Copyright (C) 2001, 2002  Justin Karneges
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */

#ifndef EDBFLATFILE_H
#define EDBFLATFILE_H

#include <QObject>
#include <QTimer>
#include <QFile>
#include <QDateTime>

#include "eventdb.h"
#include "xmpp_jid.h"
#include "psievent.h"

class EDBFlatFile : public EDB
{
    Q_OBJECT
public:
    EDBFlatFile(PsiCon *psi);
    ~EDBFlatFile();

    int features() const;
    int get(const QString &accId, const XMPP::Jid &jid, const QDateTime date, int direction, int start, int len);
    int find(const QString &accId, const QString &, const XMPP::Jid &, const QDateTime date, int direction);
    int append(const QString &accId, const XMPP::Jid &, const PsiEvent::Ptr &, int);
    int erase(const QString &accId, const XMPP::Jid &);
    QList<EDB::ContactItem> contacts(const QString &accId, int type);
    quint64 eventsCount(const QString &accId, const XMPP::Jid &jid);
    QString getStorageParam(const QString &) { return QString(); }
    void setStorageParam(const QString &, const QString &) {}

    class File;

private slots:
    void performRequests();
    void file_timeout();

private:
    class Private;
    Private *d;

    File *findFile(const XMPP::Jid &) const;
    File *ensureFile(const XMPP::Jid &);
    bool deleteFile(const XMPP::Jid &);
};

class EDBFlatFile::File : public QObject
{
    Q_OBJECT
public:
    File(const XMPP::Jid &_j);
    ~File();

    int total() const;
    int getId(QDateTime &date, int dir, int offset);
    void touch();
    PsiEvent::Ptr get(int);
    bool append(const PsiEvent::Ptr &);
    int findNearestDate(const QDateTime &date);

    static QString jidToFileName(const XMPP::Jid &);
    static QString strToFileName(const QString &s);
    static QList<EDB::ContactItem> contacts(const QString &accId, int type);

signals:
    void timeout();

private slots:
    void timer_timeout();

public:
    XMPP::Jid j;
    QString fname;
    QFile f;
    bool valid;
    QTimer *t;

    class Private;
    Private *d;

private:
    PsiEvent::Ptr lineToEvent(const QString &);
    QString eventToLine(const PsiEvent::Ptr&);
    void ensureIndex();
    QString getLine(int id);
    QDateTime getDate(int id);
};

#endif // EDBFLATFILE_H
