readmbox.cpp

/*
 * This is a simple tdeioslave to handle mbox-files.
 * Copyright (C) 2004 Mart Kelder (mart.kde@hccnet.nl)
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <config.h>
 
#include "readmbox.h"
 
#include "mbox.h"
#include "urlinfo.h"
 
#include <kdebug.h>
#include <tdeio/global.h>
 
#include <tqfile.h>
#include <tqfileinfo.h>
#include <tqstring.h>
#include <tqtextstream.h>
 
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
 
#include <utime.h>
 
ReadMBox::ReadMBox( const UrlInfo* info, MBoxProtocol* parent, bool onlynew, bool savetime )
    : MBoxFile( info, parent ),
    m_file( 0 ),
    m_stream( 0 ),
    m_current_line( new TQString( TQString() ) ),
    m_current_id( new TQString( TQString() ) ),
    m_atend( true ),
    m_prev_time( 0 ),
    m_only_new( onlynew ),
    m_savetime( savetime ),
    m_status( false ),
    m_prev_status( false ),
    m_header( true )
    
{
    if( m_info->type() == UrlInfo::invalid )
        m_mbox->emitError( TDEIO::ERR_DOES_NOT_EXIST, info->url() );
        
    if( !open( savetime ) )
        m_mbox->emitError( TDEIO::ERR_CANNOT_OPEN_FOR_READING, info->url() );
 
    if( m_info->type() == UrlInfo::message )
        if( !searchMessage( m_info->id() ) )
            m_mbox->emitError( TDEIO::ERR_DOES_NOT_EXIST, info->url() );
}
 
ReadMBox::~ReadMBox()
{
    delete m_current_line;
    close();
}
 
TQString ReadMBox::currentLine() const
{
    return *m_current_line;
}
 
TQString ReadMBox::currentID() const
{
    return *m_current_id;
}
 
bool ReadMBox::nextLine()
{
    if( !m_stream )
        return true;
        
    *m_current_line = m_stream->readLine();
    m_atend = m_current_line->isNull();
    if( m_atend ) // Cursor was at EOF
    {
        *m_current_id = TQString();
        m_prev_status = m_status;
        return true;
    }
 
    //New message
    if( m_current_line->left( 5 ) == "From " )
    {
        *m_current_id = *m_current_line;
        m_prev_status = m_status;
        m_status = true;
        m_header = true;
        return true;
    } else if( m_only_new )
    {
        if( m_header && m_current_line->left( 7 ) == "Status:" &&
            ! m_current_line->contains( "U" ) && ! m_current_line->contains( "N" ) )
        {
            m_status = false;
        }
    }
 
    if( m_current_line->stripWhiteSpace().isEmpty() )
        m_header = false;
 
    return false;
}
 
bool ReadMBox::searchMessage( const TQString& id )
{
    if( !m_stream )
        return false;
        
    while( !m_atend && *m_current_id != id )
        nextLine();
 
    return *m_current_id == id;
}
 
unsigned int ReadMBox::skipMessage()
{
    unsigned int result = m_current_line->length();
 
    if( !m_stream )
        return 0;
 
    while( !nextLine() )
        result += m_current_line->length();
 
    return result;
}
 
void ReadMBox::rewind()
{
    if( !m_stream )
        return; //Rewinding not possible
    
    m_stream->device()->reset();
    m_atend = m_stream->atEnd();
}
 
bool ReadMBox::atEnd() const
{
    if( !m_stream )
        return true;
    
    return m_atend || ( m_info->type() == UrlInfo::message && *m_current_id != m_info->id() );
}
 
bool ReadMBox::inListing() const
{
    return !m_only_new || m_prev_status;
}
 
bool ReadMBox::open( bool savetime )
{
    if( savetime )
    {
        TQFileInfo info( m_info->filename() );
    
        m_prev_time = new utimbuf;
        m_prev_time->actime = info.lastRead().toTime_t();
        m_prev_time->modtime = info.lastModified().toTime_t();
    }
    
    if( m_file )
        return false; //File already open
 
    m_file = new TQFile( m_info->filename() );
    if( !m_file->open( IO_ReadOnly ) )
    {
        delete m_file;
        m_file = 0;
        return false;
    }
    m_stream = new TQTextStream( m_file );
    skipMessage();
 
    return true;
}
 
void ReadMBox::close()
{
    if( !m_stream )
        return;
 
    delete m_stream; m_stream = 0;
    m_file->close();
    delete m_file; m_file = 0;
 
    if( m_prev_time )
        utime( TQFile::encodeName( m_info->filename() ), m_prev_time );
}