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akonadi

changerecorder_p.h

00001 /*
00002     Copyright (c) 2007 Volker Krause <vkrause@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or modify it
00005     under the terms of the GNU Library General Public License as published by
00006     the Free Software Foundation; either version 2 of the License, or (at your
00007     option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful, but WITHOUT
00010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00012     License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to the
00016     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017     02110-1301, USA.
00018 */
00019 
00020 #ifndef AKONADI_CHANGERECORDER_P_H
00021 #define AKONADI_CHANGERECORDER_P_H
00022 
00023 #include "akonadiprivate_export.h"
00024 #include "monitor_p.h"
00025 
00026 class AKONADI_TESTS_EXPORT Akonadi::ChangeRecorderPrivate : public Akonadi::MonitorPrivate
00027 {
00028   public:
00029     ChangeRecorderPrivate( ChangeRecorder* parent ) :
00030       MonitorPrivate( parent ),
00031       settings( 0 ),
00032       enableChangeRecording( true )
00033     {
00034     }
00035 
00036     Q_DECLARE_PUBLIC( ChangeRecorder )
00037     QSettings *settings;
00038     bool enableChangeRecording;
00039 
00040     virtual int pipelineSize() const
00041     {
00042       if ( enableChangeRecording )
00043         return 0; // we fill the pipeline ourselves when using change recording
00044       return MonitorPrivate::pipelineSize();
00045     }
00046 
00047     virtual void slotNotify( const NotificationMessage::List &msgs )
00048     {
00049       Q_Q( ChangeRecorder );
00050       const int oldChanges = pendingNotifications.size();
00051       MonitorPrivate::slotNotify( msgs ); // with change recording disabled this will automatically take care of dispatching notification messages
00052       if ( enableChangeRecording && pendingNotifications.size() != oldChanges ) {
00053         saveNotifications();
00054         emit q->changesAdded();
00055       }
00056     }
00057 
00058     void loadNotifications()
00059     {
00060       pendingNotifications.clear();
00061 
00062       const QString changesFileName = settings->fileName() + QLatin1String( "_changes.dat" );
00063 
00070       if ( !QFile::exists( changesFileName ) ) {
00071         QStringList list;
00072         settings->beginGroup( QLatin1String( "ChangeRecorder" ) );
00073         const int size = settings->beginReadArray( QLatin1String( "change" ) );
00074 
00075         for ( int i = 0; i < size; ++i ) {
00076           settings->setArrayIndex( i );
00077           NotificationMessage msg;
00078           msg.setSessionId( settings->value( QLatin1String( "sessionId" ) ).toByteArray() );
00079           msg.setType( (NotificationMessage::Type)settings->value( QLatin1String( "type" ) ).toInt() );
00080           msg.setOperation( (NotificationMessage::Operation)settings->value( QLatin1String( "op" ) ).toInt() );
00081           msg.setUid( settings->value( QLatin1String( "uid" ) ).toLongLong() );
00082           msg.setRemoteId( settings->value( QLatin1String( "rid" ) ).toString() );
00083           msg.setResource( settings->value( QLatin1String( "resource" ) ).toByteArray() );
00084           msg.setParentCollection( settings->value( QLatin1String( "parentCol" ) ).toLongLong() );
00085           msg.setParentDestCollection( settings->value( QLatin1String( "parentDestCol" ) ).toLongLong() );
00086           msg.setMimeType( settings->value( QLatin1String( "mimeType" ) ).toString() );
00087           list = settings->value( QLatin1String( "itemParts" ) ).toStringList();
00088           QSet<QByteArray> itemParts;
00089           Q_FOREACH( const QString &entry, list )
00090             itemParts.insert( entry.toLatin1() );
00091           msg.setItemParts( itemParts );
00092           pendingNotifications << msg;
00093         }
00094 
00095         settings->endArray();
00096 
00097         // save notifications to the new file...
00098         saveNotifications();
00099 
00100         // ...delete the legacy list...
00101         settings->remove( QString() );
00102         settings->endGroup();
00103 
00104         // ...and continue as usually
00105       }
00106 
00107       QFile file( changesFileName );
00108       if ( !file.open( QIODevice::ReadOnly ) )
00109         return;
00110 
00111       QDataStream stream( &file );
00112       stream.setVersion( QDataStream::Qt_4_6 );
00113 
00114       qulonglong size;
00115       QByteArray sessionId, resource;
00116       int type, operation;
00117       qlonglong uid, parentCollection, parentDestCollection;
00118       QString remoteId, mimeType;
00119       QSet<QByteArray> itemParts;
00120 
00121       stream >> size;
00122       for ( qulonglong i = 0; i < size; ++i ) {
00123         NotificationMessage msg;
00124 
00125         stream >> sessionId;
00126         stream >> type;
00127         stream >> operation;
00128         stream >> uid;
00129         stream >> remoteId;
00130         stream >> resource;
00131         stream >> parentCollection;
00132         stream >> parentDestCollection;
00133         stream >> mimeType;
00134         stream >> itemParts;
00135 
00136         msg.setSessionId( sessionId );
00137         msg.setType( static_cast<NotificationMessage::Type>( type ) );
00138         msg.setOperation( static_cast<NotificationMessage::Operation>( operation ) );
00139         msg.setUid( uid );
00140         msg.setRemoteId( remoteId );
00141         msg.setResource( resource );
00142         msg.setParentCollection( parentCollection );
00143         msg.setParentDestCollection( parentDestCollection );
00144         msg.setMimeType( mimeType );
00145         msg.setItemParts( itemParts );
00146         pendingNotifications << msg;
00147       }
00148     }
00149 
00150     void saveNotifications()
00151     {
00152       if ( !settings )
00153         return;
00154 
00155       QFile file( settings->fileName() + QLatin1String( "_changes.dat" ) );
00156       QFileInfo info( file );
00157       if ( !QFile::exists( info.absolutePath() ) ) {
00158         QDir dir;
00159         dir.mkpath( info.absolutePath() );
00160       }
00161       if ( !file.open( QIODevice::WriteOnly ) ) {
00162         qWarning() << "could not save notifications to file " << file.fileName();
00163         return;
00164       }
00165 
00166       QDataStream stream( &file );
00167       stream.setVersion( QDataStream::Qt_4_6 );
00168 
00169       stream << (qulonglong)pendingNotifications.count();
00170 
00171       for ( int i = 0; i < pendingNotifications.count(); ++i ) {
00172         const NotificationMessage msg = pendingNotifications.at( i );
00173 
00174         stream << msg.sessionId();
00175         stream << msg.type();
00176         stream << msg.operation();
00177         stream << msg.uid();
00178         stream << msg.remoteId();
00179         stream << msg.resource();
00180         stream << msg.parentCollection();
00181         stream << msg.parentDestCollection();
00182         stream << msg.mimeType();
00183         stream << msg.itemParts();
00184       }
00185 
00186       file.close();
00187     }
00188 };
00189 
00190 #endif

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