/*
 * Copyright 2007-2012, Haiku, Inc. All rights reserved.
 * Copyright 2001 Dr. Zoidberg Enterprises. All rights reserved.
 */
#ifndef MAIL_MESSAGE_IO_H
#define MAIL_MESSAGE_IO_H


#include <DataIO.h>
#include <Message.h>
#include <Path.h>

#include "POP3.h"


class BMailMessageIO : public BPositionIO {
public:
                                                                BMailMessageIO(POP3Protocol* protocol,
                                                                        BPositionIO* dumpTo, int32 messageID);
                                                                ~BMailMessageIO();

        virtual ssize_t                         ReadAt(off_t pos, void* buffer,
                                                                        size_t amountToRead);
        virtual ssize_t                         WriteAt(off_t pos, const void* buffer,
                                                                        size_t amountToWrite);

        virtual off_t                           Seek(off_t position, uint32 seekMode);
        virtual off_t                           Position() const;

private:
                        void                            _ResetSize();

private:
                        enum MessageIOStateEnum {
                                READ_HEADER_NEXT,
                                READ_BODY_NEXT,
                                ALL_READING_DONE
                        };

                        BPositionIO*            fSlave;
                        int32                           fMessageID;
                        POP3Protocol*           fProtocol;
                        size_t                          fSize;
                        MessageIOStateEnum      fState;
};


#endif  /* MAIL_MESSAGE_IO_H */