QTfrontend/tcpBase.cpp
author koda
Wed, 14 Sep 2011 22:39:39 +0200
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>
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 * Copyright (c) 2007-2011 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include "tcpBase.h"
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#include <QMessageBox>
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#include <QList>
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#include <QImage>
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#include "hwconsts.h"
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QList<TCPBase*> srvsList;
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QPointer<QTcpServer> TCPBase::IPCServer(0);
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TCPBase::~TCPBase()
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{
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}
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TCPBase::TCPBase(bool demoMode) :
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  m_isDemoMode(demoMode),
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  IPCSocket(0)
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{
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  if(!IPCServer) {
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    IPCServer = new QTcpServer(0);
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    IPCServer->setMaxPendingConnections(1);
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    if (!IPCServer->listen(QHostAddress::LocalHost)) {
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      QMessageBox::critical(0, tr("Error"),
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                tr("Unable to start the server: %1.")
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                .arg(IPCServer->errorString()));
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      exit(0); // FIXME - should be graceful exit here
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    }
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  }
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  ipc_port=IPCServer->serverPort();
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}
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void TCPBase::NewConnection()
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{
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  if(IPCSocket) {
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    // connection should be already finished
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    return;
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  }
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  disconnect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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  IPCSocket = IPCServer->nextPendingConnection();
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  if(!IPCSocket) return;
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  connect(IPCSocket, SIGNAL(disconnected()), this, SLOT(ClientDisconnect()));
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  connect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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  SendToClientFirst();
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}
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void TCPBase::RealStart()
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{
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  connect(IPCServer, SIGNAL(newConnection()), this, SLOT(NewConnection()));
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  IPCSocket = 0;
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  QProcess * process;
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  process = new QProcess;
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  connect(process, SIGNAL(error(QProcess::ProcessError)), this, SLOT(StartProcessError(QProcess::ProcessError)));
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  QStringList arguments=getArguments();
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  // redirect everything written on stdout/stderr
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  if(isDevBuild)
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    process->setProcessChannelMode(QProcess::ForwardedChannels);
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  process->start(bindir->absolutePath() + "/hwengine", arguments);
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}
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void TCPBase::ClientDisconnect()
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{
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  disconnect(IPCSocket, SIGNAL(readyRead()), this, SLOT(ClientRead()));
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  onClientDisconnect();
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  if(srvsList.size()==1) srvsList.pop_front();
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  emit isReadyNow();
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  IPCSocket->deleteLater();
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  deleteLater();
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}
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void TCPBase::ClientRead()
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{
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  QByteArray readed=IPCSocket->readAll();
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  if(readed.isEmpty()) return;
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  readbuffer.append(readed);
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  onClientRead();
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}
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void TCPBase::StartProcessError(QProcess::ProcessError error)
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{
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  QMessageBox::critical(0, tr("Error"),
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            tr("Unable to run engine: %1 (")
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            .arg(error) + bindir->absolutePath() + "/hwengine)");
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}
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void TCPBase::tcpServerReady()
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{
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  disconnect(srvsList.takeFirst(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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  RealStart();
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}
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void TCPBase::Start()
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{
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  if(srvsList.isEmpty()) {
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    srvsList.push_back(this);
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  } else {
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    connect(srvsList.back(), SIGNAL(isReadyNow()), this, SLOT(tcpServerReady()));
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    srvsList.push_back(this);
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    return;
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  }
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  RealStart();
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}
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void TCPBase::onClientRead()
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{
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}
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void TCPBase::onClientDisconnect()
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{
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}
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void TCPBase::SendToClientFirst()
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{
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}
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void TCPBase::SendIPC(const QByteArray & buf)
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{
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    if (buf.size() > MAXMSGCHARS) return;
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    quint8 len = buf.size();
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    RawSendIPC(QByteArray::fromRawData((char *)&len, 1) + buf);
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}
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void TCPBase::RawSendIPC(const QByteArray & buf)
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{
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    if (!IPCSocket)
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    {
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        toSendBuf += buf;
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    } else
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    {
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        if (toSendBuf.size() > 0)
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        {
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            IPCSocket->write(toSendBuf);
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            if(m_isDemoMode) demo.append(toSendBuf);
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            toSendBuf.clear();
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        }
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        if(!buf.isEmpty()) {
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          IPCSocket->write(buf);
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          if(m_isDemoMode) demo.append(buf);
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        }
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    }
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}