1 files changed, 260 insertions, 0 deletions
diff --git a/ksysguard/gui/ksgrd/SensorAgent.cc b/ksysguard/gui/ksgrd/SensorAgent.cc
new file mode 100644
index 000000000..a24bf5594
--- /dev/null
+++ b/ksysguard/gui/ksgrd/SensorAgent.cc
@@ -0,0 +1,260 @@
+/*
+    KSysGuard, the KDE System Guard
+   
+    Copyright (c) 1999 - 2001 Chris Schlaeger <cs@kde.org>
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of version 2 of the GNU General Public
+    License as published by the Free Software Foundation.
+
+    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 program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+*/
+
+#include <stdlib.h>
+
+#include <kdebug.h>
+#include <klocale.h>
+#include <kpassdlg.h> 
+
+#include "SensorClient.h"
+#include "SensorManager.h"
+
+#include "SensorAgent.h"
+
+/**
+  This can be used to debug communication problems with the daemon.
+  Should be set to 0 in any production version.
+*/
+#define SA_TRACE 0
+
+using namespace KSGRD;
+
+SensorAgent::SensorAgent( SensorManager *sm )
+  : mSensorManager( sm )
+{
+  /* SensorRequests migrate from the inputFIFO to the processingFIFO. So
+   * we only have to delete them when they are removed from the
+   * processingFIFO. */
+  mInputFIFO.setAutoDelete( false );
+  mProcessingFIFO.setAutoDelete( true );
+
+  mDaemonOnLine = false;
+  mTransmitting = false;
+  mState = 0;
+}
+
+SensorAgent::~SensorAgent()
+{
+}
+
+bool SensorAgent::sendRequest( const QString &req, SensorClient *client, int id )
+{
+  /* The request is registered with the FIFO so that the answer can be
+   * routed back to the requesting client. */
+  mInputFIFO.prepend( new SensorRequest( req, client, id ) );
+
+#if SA_TRACE
+  kdDebug(1215) << "-> " << req << "(" << mInputFIFO.count() << "/"
+                << mProcessingFIFO.count() << ")" << endl;
+#endif
+  executeCommand();
+
+  return false;
+}
+
+void SensorAgent::processAnswer( const QString &buffer )
+{
+#if SA_TRACE
+  kdDebug(1215) << "<- " << buffer << endl;
+#endif
+
+  for ( uint i = 0; i < buffer.length(); i++ ) {
+    if ( buffer[ i ] == '\033' ) {
+      mState = ( mState + 1 ) & 1;
+      if ( !mErrorBuffer.isEmpty() && mState == 0 ) {
+        if ( mErrorBuffer == "RECONFIGURE\n" )
+          emit reconfigure( this );
+        else {
+          /* We just received the end of an error message, so we
+           * can display it. */
+          SensorMgr->notify( i18n( "Message from %1:\n%2" )
+                           .arg( mHostName )
+                           .arg( mErrorBuffer ) );
+        }
+        mErrorBuffer = QString::null;
+      }
+    } else if ( mState == 0 ) // receiving to answerBuffer
+      mAnswerBuffer += buffer[ i ];
+    else  // receiving to errorBuffer
+      mErrorBuffer += buffer[ i ];
+  }
+
+  int end;
+  // And now the real information
+  while ( ( end = mAnswerBuffer.find( "\nksysguardd> " ) ) >= 0 ) {
+#if SA_TRACE
+    kdDebug(1215) << "<= " << mAnswerBuffer.left( end )
+                  << "(" << mInputFIFO.count() << "/"
+                  << mProcessingFIFO.count() << ")" << endl;
+#endif
+    if ( !mDaemonOnLine ) {
+      /* First '\nksysguardd> ' signals that the daemon is
+       * ready to serve requests now. */
+      mDaemonOnLine = true;
+#if SA_TRACE
+      kdDebug(1215) << "Daemon now online!" << endl;
+#endif
+      mAnswerBuffer = QString::null;
+      break;
+    }
+	
+    // remove pending request from FIFO
+    SensorRequest* req = mProcessingFIFO.last();
+    if ( !req ) {
+      kdDebug(1215)	<< "ERROR: Received answer but have no pending "
+                    << "request! : " << mAnswerBuffer.left( end ) << endl;
+      mAnswerBuffer = QString::null;
+    } else {		
+      if ( !req->client() ) {
+        /* The client has disappeared before receiving the answer
+         * to his request. */
+      } else {
+        if ( mAnswerBuffer.left( end ) == "UNKNOWN COMMAND" ) {
+        /* Notify client that the sensor seems to be no longer
+         * available. */
+        req->client()->sensorLost( req->id() );
+        } else {
+        // Notify client of newly arrived answer.
+          req->client()->answerReceived( req->id(), mAnswerBuffer.left( end ) );
+        }
+      }
+      mProcessingFIFO.removeLast();
+    }
+    // chop off the processed part of the answer buffer
+    mAnswerBuffer.remove( 0, end + strlen( "\nksysguardd> " ) );
+  }
+
+  executeCommand();
+}
+
+void SensorAgent::executeCommand()
+{
+  /* This function is called whenever there is a chance that we have a
+   * command to pass to the daemon. But the command many only be send
+   * if the daemon is online and there is no other command currently
+   * being sent. */
+  if ( mDaemonOnLine && txReady() && !mInputFIFO.isEmpty() ) {
+    // take oldest request for input FIFO
+    SensorRequest* req = mInputFIFO.last();
+    mInputFIFO.removeLast();
+
+#if SA_TRACE
+    kdDebug(1215) << ">> " << req->request().ascii() << "(" << mInputFIFO.count()
+                  << "/" << mProcessingFIFO.count() << ")" << endl;
+#endif
+    // send request to daemon
+    QString cmdWithNL = req->request() + "\n";
+    if ( writeMsg( cmdWithNL.ascii(), cmdWithNL.length() ) )
+      mTransmitting = true;
+    else
+      kdDebug(1215) << "SensorAgent::writeMsg() failed" << endl;
+
+    // add request to processing FIFO
+    mProcessingFIFO.prepend( req );
+  }
+}
+
+void SensorAgent::disconnectClient( SensorClient *client )
+{
+  for ( SensorRequest *req = mInputFIFO.first(); req; req = mInputFIFO.next() )
+    if ( req->client() == client )
+      req->setClient( 0 );
+  for ( SensorRequest *req = mProcessingFIFO.first(); req; req = mProcessingFIFO.next() )
+    if ( req->client() == client )
+      req->setClient( 0 );
+}
+
+SensorManager *SensorAgent::sensorManager()
+{
+  return mSensorManager;
+}
+
+void SensorAgent::setDaemonOnLine( bool value )
+{
+  mDaemonOnLine = value;
+}
+
+bool SensorAgent::daemonOnLine() const
+{
+  return mDaemonOnLine;
+}
+
+void SensorAgent::setTransmitting( bool value )
+{
+  mTransmitting = value;
+}
+
+bool SensorAgent::transmitting() const
+{
+  return mTransmitting;
+}
+
+void SensorAgent::setHostName( const QString &hostName )
+{
+  mHostName = hostName;
+}
+
+const QString &SensorAgent::hostName() const
+{
+  return mHostName;
+}
+
+
+SensorRequest::SensorRequest( const QString &request, SensorClient *client, int id )
+  : mRequest( request ), mClient( client ), mId( id )
+{
+}
+
+SensorRequest::~SensorRequest()
+{
+}
+
+void SensorRequest::setRequest( const QString &request )
+{
+  mRequest = request;
+}
+
+QString SensorRequest::request() const
+{
+  return mRequest;
+}
+
+void SensorRequest::setClient( SensorClient *client )
+{
+  mClient = client;
+}
+
+SensorClient *SensorRequest::client()
+{
+  return mClient;
+}
+
+void SensorRequest::setId( int id )
+{
+  mId = id;
+}
+
+int SensorRequest::id()
+{
+  return mId;
+}
+
+#include "SensorAgent.moc"