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tdemultimedia/libkcddb/asynccddbplookup.cpp

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6.9 KiB

/*
Copyright (C) 2002 Rik Hemsley (rikkus) <rik@kde.org>
Copyright (C) 2002 Benjamin Meyer <ben-devel@meyerhome.net>
Copyright (C) 2005 Richard Lärkäng <nouseforaname@home.se>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <kdebug.h>
#include "asynccddbplookup.h"
namespace KCDDB
{
AsyncCDDBPLookup::AsyncCDDBPLookup()
: CDDBPLookup(),
state_(Idle)
{
}
AsyncCDDBPLookup::~AsyncCDDBPLookup()
{
}
CDDB::Result
AsyncCDDBPLookup::lookup
(
const TQString & hostname,
uint port,
const TrackOffsetList & trackOffsetList
)
{
socket_ = new KNetwork::TDEBufferedSocket(hostname,TQString::number(port));
socket_->setBlocking( false );
connect (socket_, TQT_SIGNAL(gotError(int)), TQT_SLOT(slotGotError(int)));
connect (socket_, TQT_SIGNAL( connected(const KResolverEntry &) ),
TQT_SLOT( slotConnectionSuccess() ) );
connect (socket_, TQT_SIGNAL( readyRead() ), TQT_SLOT( slotReadyRead() ) );
if ( trackOffsetList.count() < 3 )
return UnknownError;
trackOffsetList_ = trackOffsetList;
state_ = WaitingForConnection;
if ( !socket_->connect(hostname, TQString::number(port)) )
{
state_ = Idle;
emit finished( NoResponse );
return NoResponse;
}
return Success;
}
void
AsyncCDDBPLookup::slotGotError(int error)
{
state_ = Idle;
if ( error == KNetwork::TDESocketBase::LookupFailure )
emit finished( HostNotFound );
else if ( error == KNetwork::TDESocketBase::ConnectionTimedOut ||
error == KNetwork::TDESocketBase::NetFailure )
emit finished( NoResponse );
else
emit finished( UnknownError );
}
void
AsyncCDDBPLookup::slotConnectionSuccess()
{
kdDebug(60010) << "Connection successful" << endl;
state_ = WaitingForGreeting;
}
void
AsyncCDDBPLookup::slotReadyRead()
{
kdDebug(60010) << "Ready to read. State: " << stateToString() << endl;
while ( Idle != state_ && isConnected() && socket_->canReadLine() )
read();
}
void
AsyncCDDBPLookup::read()
{
switch ( state_ )
{
case WaitingForGreeting:
if ( !parseGreeting( readLine() ) )
{
result_ = ServerError;
doQuit();
return;
}
doHandshake();
break;
case WaitingForHandshake:
if ( !parseHandshake( readLine() ) )
{
result_ = ServerError;
doQuit();
return;
}
doProto();
break;
case WaitingForProtoResponse:
// Ignore the response for now
readLine();
doQuery();
break;
case WaitingForQueryResponse:
result_ = parseQuery( readLine() );
switch ( result_ )
{
case Success:
requestCDInfoForMatch();
break;
case MultipleRecordFound:
state_ = WaitingForMoreMatches;
break;
default: // Error :(
doQuit();
return;
}
break;
case WaitingForMoreMatches:
{
TQString line = readLine();
if (line.startsWith("."))
requestCDInfoForMatch();
else
parseExtraMatch( line );
}
break;
case WaitingForCDInfoResponse:
{
Result result = parseRead( readLine() );
if ( Success != result )
{
result_ = result;
doQuit();
return;
}
state_ = WaitingForCDInfoData;
}
break;
case WaitingForCDInfoData:
{
TQString line = readLine();
if (line.startsWith("."))
{
parseCDInfoData();
requestCDInfoForMatch();
}
else
cdInfoBuffer_ << line;
}
break;
case WaitingForQuitResponse:
state_ = Idle;
while ( socket_->bytesAvailable() )
socket_->getch();
close();
emit finished( result_ );
break;
default:
break;
}
}
TQString
AsyncCDDBPLookup::readLine()
{
return TQString::fromUtf8(socket_->readLine());
}
void
AsyncCDDBPLookup::doHandshake()
{
sendHandshake();
state_ = WaitingForHandshake;
}
void
AsyncCDDBPLookup::doProto()
{
sendProto();
state_ = WaitingForProtoResponse;
}
void
AsyncCDDBPLookup::doQuery()
{
sendQuery();
state_ = WaitingForQueryResponse;
}
void
AsyncCDDBPLookup::requestCDInfoForMatch()
{
if (matchList_.isEmpty())
{
result_ = cdInfoList_.isEmpty()? NoRecordFound : Success;
doQuit();
return;
}
CDDBMatch match = matchList_.first();
matchList_.remove( match );
sendRead( match );
state_ = WaitingForCDInfoResponse;
}
void
AsyncCDDBPLookup::parseCDInfoData()
{
CDInfo info;
if (info.load( cdInfoBuffer_ ))
{
info.category = category_;
cdInfoList_.append( info );
}
cdInfoBuffer_.clear();
}
void
AsyncCDDBPLookup::doQuit()
{
state_ = WaitingForQuitResponse;
sendQuit();
}
TQString
AsyncCDDBPLookup::stateToString() const
{
switch (state_)
{
case Idle:
return "Idle";
break;
case WaitingForConnection:
return "WaitingForConnection";
break;
case WaitingForGreeting:
return "WaitingForGreeting";
break;
case WaitingForProtoResponse:
return "WaitingForProtoResponse";
break;
case WaitingForHandshake:
return "WaitingForHandshake";
break;
case WaitingForQueryResponse:
return "WaitingForQueryResponse";
break;
case WaitingForMoreMatches:
return "WaitingForMoreMatches";
break;
case WaitingForCDInfoResponse:
return "WaitingForCDInfoResponse";
break;
case WaitingForCDInfoData:
return "WaitingForCDInfoData";
break;
case WaitingForQuitResponse:
return "WaitingForQuitResponse";
break;
default:
return "Unknown";
break;
}
}
}
#include "asynccddbplookup.moc"