--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/videocollection/videocollectionwrapper/src/videodeleteworker.cpp	Fri Apr 16 14:59:52 2010 +0300
@@ -0,0 +1,240 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: VideoDeleteWorker class implementation
+* 
+*/
+// INCLUDE FILES
+
+#include <qtimer.h>
+#include "videocollectioncommon.h"
+#include "videocollectionclient.h"
+#include "videodeleteworker.h"
+
+
+
+// ================= MEMBER FUNCTIONS =======================
+//
+
+/**
+ * private global inline hash function for TMPXItemId keys in QSet
+ */
+inline uint qHash(TMPXItemId key) 
+{ 
+    QPair<uint, uint> keyPair(key.iId1, key.iId2); 
+
+    return qHash(keyPair);
+}
+
+// -----------------------------------------------------------------------------
+// VideoDeleteWorker()
+// -----------------------------------------------------------------------------
+//
+VideoDeleteWorker::VideoDeleteWorker(VideoCollectionClient &collection, QObject *parent) :
+QObject(parent),
+mCollectionClient(collection),
+mRequestWaitTimer(0),
+mLastStatus(0),
+mLastStatusData(QVariant())
+{
+    
+}
+
+// -----------------------------------------------------------------------------
+// ~VideoDeleteWorker()
+// -----------------------------------------------------------------------------
+//
+VideoDeleteWorker::~VideoDeleteWorker()
+{
+    if(mRequestWaitTimer && mRequestWaitTimer->isActive())
+    {
+        mRequestWaitTimer->stop();
+    }
+    // if we're still doing some background deletion, 
+    // dump all deletes to collection and stop timer
+    flushAll();
+}
+
+// -----------------------------------------------------------------------------
+// requestDelete()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::requestDelete(const QList<TMPXItemId> &indexList)
+{
+    if(!mRequestWaitTimer)
+    {
+        mRequestWaitTimer = new QTimer();
+        connect(mRequestWaitTimer, SIGNAL(timeout()), this, SLOT(execDeleteBlockSlot()));
+    }
+    
+    mRemoveBuffer.unite(QSet<TMPXItemId>::fromList(indexList));
+
+    if(!mRequestWaitTimer->isActive())
+    {
+        // first startup throught zero timer, after that
+        // deletion is chained. Next delete block starts from
+        // modelChangedSlot
+        mRequestWaitTimer->setSingleShot(true);
+        mRequestWaitTimer->start(0);
+    }
+}
+
+// -----------------------------------------------------------------------------
+// removeFromRequest()
+// -----------------------------------------------------------------------------
+//
+int VideoDeleteWorker::removeFromRequest(TMPXItemId &itemId)
+{
+    mRemoveBuffer.remove(itemId);
+    return mRemoveBuffer.count();
+}
+   
+// -----------------------------------------------------------------------------
+// isDeleting()
+// -----------------------------------------------------------------------------
+//
+bool VideoDeleteWorker::isDeleting()
+{
+    return mRemoveBuffer.count() ? true : false;
+}
+
+// -----------------------------------------------------------------------------
+// updateStatus()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::updateStatus(int status, QVariant data)
+{
+    // do not update invalid status
+    if(status != VideoCollectionCommon::statusDeleteSucceed && 
+       status != VideoCollectionCommon::statusSingleDeleteFail &&
+       status != VideoCollectionCommon::statusMultipleDeleteFail)
+    {
+        return;
+    }
+    
+    if(!mLastStatus || mLastStatus == VideoCollectionCommon::statusDeleteSucceed)
+    {
+        mLastStatus = status;
+        mLastStatusData = data;
+        return;    
+    }
+    if(status == VideoCollectionCommon::statusDeleteSucceed)
+    {
+        return;
+    }
+    int count = 0;
+    if(mLastStatus == VideoCollectionCommon::statusSingleDeleteFail)
+    {
+        // old status was single fail
+        mLastStatus = VideoCollectionCommon::statusMultipleDeleteFail;
+        count = 2;
+        if(status == VideoCollectionCommon::statusMultipleDeleteFail)
+        {
+            count = data.toInt() + 1;
+        }
+        // count of failed is now 2
+        mLastStatusData = count;
+        return;
+    }
+    // all other cases mean multi
+    count = data.toInt();
+    mLastStatus = VideoCollectionCommon::statusMultipleDeleteFail;
+    count ? mLastStatusData = mLastStatusData.toInt() + count : 
+                        mLastStatusData = mLastStatusData.toInt() + 1;
+}
+
+// -----------------------------------------------------------------------------
+// getStatus()
+// -----------------------------------------------------------------------------
+//
+int VideoDeleteWorker::getLastStatus(QVariant &data)
+{
+    data = mLastStatusData;
+    return mLastStatus;
+}
+
+// -----------------------------------------------------------------------------
+// clearStatus()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::clearStatus()
+{
+    mLastStatus = 0;
+    mLastStatusData = QVariant();
+}
+
+// -----------------------------------------------------------------------------
+// continueSlot()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::continueSlot()
+{
+   if(!mRequestWaitTimer || !mRemoveBuffer.count())
+   {
+       return;
+   }
+   if(!mRequestWaitTimer->isActive())
+   {
+       mRequestWaitTimer->setSingleShot(true);
+       mRequestWaitTimer->start(0);
+   }
+}
+
+// -----------------------------------------------------------------------------
+// doBackgroundDeleteSlot()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::execDeleteBlockSlot()
+{
+    if(!mRemoveBuffer.count())
+    {
+        return;
+    }
+    QList<TMPXItemId> deleteBlock;
+    
+    // create block of max 3 items
+    int counter = 0;
+    QSet<TMPXItemId>::iterator iter = mRemoveBuffer.begin();
+    while(iter != mRemoveBuffer.end() && counter < 3)
+    {
+        deleteBlock.append((*iter));
+        iter = mRemoveBuffer.erase(iter);
+        counter++;
+    }
+    
+    // need to handle errors somehow
+    if(mCollectionClient.deleteVideos(&deleteBlock) != 0)
+    {
+        // signal block delete startup failed
+        emit deleteStartupFailed(deleteBlock);
+    } 
+}
+
+// -----------------------------------------------------------------------------
+// flushAll()
+// -----------------------------------------------------------------------------
+//
+void VideoDeleteWorker::flushAll()
+{
+    if(!mRemoveBuffer.count())
+    {
+        return;
+    }
+    QList<TMPXItemId> ids = mRemoveBuffer.toList();
+    mCollectionClient.deleteVideos(&ids);
+    mRemoveBuffer.clear();
+}
+            
+
+
+// End of file