diff -r 000000000000 -r ba25891c3a9e ncdengine/provider/server/inc/ncdpreviewmanager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/provider/server/inc/ncdpreviewmanager.h	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,198 @@
+/*
+* Copyright (c) 2006 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:   Contains CNcdPreviewManager class
+*
+*/
+
+
+#ifndef C_NCDPREVIEWMANAGER_H
+#define C_NCDPREVIEWMANAGER_H
+
+
+#include <e32base.h>
+#include <f32file.h>
+#include "ncdstoragedataitem.h"
+
+class CNcdNodeIdentifier;
+class MNcdStorageManager;
+class MNcdFileStorage;
+class CNcdGeneralManager;
+
+/**
+ * Manages previews
+ */
+class CNcdPreviewManager : public CBase, public MNcdStorageDataItem
+    {
+public: // Constructor & destructor
+
+        
+    static CNcdPreviewManager* NewL( 
+        CNcdGeneralManager& aGeneralManager, TInt aMaxCount );    
+        
+    virtual ~CNcdPreviewManager();
+    
+public:    
+
+    /**
+     * Adds a new preview file.
+     *
+     * @param aId Id used to identify the owner of the preview
+     * @param aUri Download uri
+     * @param aPreviewFile Downloaded preview file
+     * @param aMimeType MIME type
+     */
+    void AddPreviewL( 
+        const CNcdNodeIdentifier& aId, 
+        const TDesC& aUri, 
+        const TDesC& aPreviewFile,
+        const TDesC& aMimeType );
+
+
+    /**
+     * Removes a preview file
+     *
+     * @param aId Id used to identify the owner of the preview
+     * @param aUri URI where the preview was downloaded from
+     * @return KErrNone or a Symbian error code
+     */
+    TInt RemovePreviewL( 
+        const CNcdNodeIdentifier& aId, 
+        const TDesC& aUri );
+       
+    
+    /**
+     * Opens a preview file if it exists
+     *
+     */   
+    RFile PreviewL( 
+        RFs& aFs,
+        const CNcdNodeIdentifier& aId,
+        const TDesC& aUri );
+    
+    
+    /**
+     * Checks that a preview file exists
+     */
+    TBool PreviewExists( 
+        const CNcdNodeIdentifier& aId,
+        const TDesC& aUri ) const;
+       
+    
+    const TDesC& PreviewMimeType(
+        const CNcdNodeIdentifier& aId,
+        const TDesC& aUri ) const;
+           
+    /**
+     * Removes all previews
+     */
+    void RemoveAllPreviewsL();     
+
+    void SaveDataL();
+    void LoadDataL();
+    
+public: // MNcdStorageDataItem
+
+
+    /**
+     * @see MNcdStorageDataItem::ExternalizeL()
+     */
+    void ExternalizeL( RWriteStream& aStream );
+
+
+    /**
+     * @see MNcdStorageDataItem::InternalizeL()
+     */
+    void InternalizeL( RReadStream& aStream );
+
+     
+private:
+
+    CNcdPreviewManager( CNcdGeneralManager& aGeneralManager, TInt aMaxCount );
+    void ConstructL();
+    
+    CNcdPreviewManager( const CNcdPreviewManager& );
+    CNcdPreviewManager& operator=( const CNcdPreviewManager& );
+    
+    
+    // Searches for the preview
+    TInt FindPreview( const CNcdNodeIdentifier& aId, const TDesC& aUri ) const;
+    
+    // Returns the file storage for the client
+    MNcdFileStorage& FileStorageL( const CNcdNodeIdentifier& aId );
+    
+protected:
+
+    /** 
+     * Utility class for holding preview related data
+     */
+    class  CNcdPreviewData : public CBase
+        {      
+    public:
+    
+        CNcdPreviewData();
+        static CNcdPreviewData* NewLC( 
+            const CNcdNodeIdentifier& aId,
+            const TDesC& aUri, 
+            const TDesC& aPreviewFile,
+            const TDesC& aMimeType );
+            
+        virtual ~CNcdPreviewData();
+        
+        TBool Equals( const CNcdNodeIdentifier& aId, const TDesC& aUri ) const;
+        
+        const CNcdNodeIdentifier& Id() const;
+        const TDesC& Uri() const;
+        const TDesC& Filename() const;
+        const TDesC& MimeType() const;
+
+        void ExternalizeL( RWriteStream& aStream );
+        void InternalizeL( RReadStream& aStream );
+
+    
+    protected:
+    
+        void ConstructL( 
+            const CNcdNodeIdentifier& aId,
+            const TDesC& aUri, 
+            const TDesC& aPreviewFile,
+            const TDesC& aMimeType );
+        
+        CNcdPreviewData( const CNcdPreviewData& );
+        CNcdPreviewData& operator=( const CNcdPreviewData& );
+    
+    private:
+        CNcdNodeIdentifier* iId;
+        HBufC* iUri;
+        HBufC* iFilename;
+        HBufC* iMimeType;
+        };
+
+    typedef RPointerArray<CNcdPreviewData> RNcdPreviewArray;
+
+        
+private:
+
+    CNcdGeneralManager& iGeneralManager;
+    MNcdStorageManager& iStorageManager;
+
+    // Maximum previews per family
+    TInt iMaxCount;
+    
+    // PreviewManager is family specific so we need only one dimensional
+    // array for all the previews of a family
+    RNcdPreviewArray iPreviews;
+        
+    };
+
+#endif // C_NCDPREVIEWMANAGER_H