ncdengine/inc/ncdnodepurchase.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:51:10 +0200
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:   Contains MNcdNodePurchase interface
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*
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*/
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#ifndef M_NCD_NODE_PURCHASE_H
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#define M_NCD_NODE_PURCHASE_H
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#include <e32std.h>
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#include "catalogsbase.h"
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#include "ncdinterfaceids.h"
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#include "catalogsarray.h"
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class MNcdPurchaseOption;
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class MNcdPurchaseOperation;
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class MNcdPurchaseOperationObserver;
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/**
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 *  Provides functions for the purchase process of the node content.
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 *  There may be multiple purchase options for the content. And every
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 *  purchase option may have multiple payment methods.
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 *
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 *  After the node has been purchased the content has to be downloaded.
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 *  Downloading may be done by using the download interface functions.
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 *
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 *  
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 */
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class MNcdNodePurchase : public virtual MCatalogsBase
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    {
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public:
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    /**
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     * Unique identifier for the interface, required for all MCatalogsBase interfaces.
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     *
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     * 
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     */
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    enum { KInterfaceUid = ENcdNodePurchaseUid };
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    /**
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     * Gives the available purchase options for the node.
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     *
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     * @note This function should be called to get current and valid list of
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     *       purchaseoptions after node's state changes.
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     *
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     * @return Array of pointers to available purchase options for the node.
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     *         Counted, Release() must be called for each after use, e.g. with
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     *         a call to RCatalogsArray::ResetAndDestroy()
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     *         
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     * @exception Leave System wide error codes.
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     */
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    virtual RCatalogsArray< MNcdPurchaseOption > PurchaseOptionsL() const = 0;
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    /**
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     * Gives a purchase option whose id matches given purchase option id.
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     *
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     * @return Purchase option whose id matches given purchase option id.
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     *         NULL if no purchase option with given id is found from the
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     *         purchase options available for the node.
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     *         Counted, Release() must be called after use.
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     *         
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     * @exception Leave System wide error codes.
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     */
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    virtual MNcdPurchaseOption* PurchaseOptionL(
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        const TDesC& aPurchaseOptionId ) const = 0;
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    /**
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     * Starts the purchase operation for the given purchase option.
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     *
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     * @note The reference count of the operation object is increased by one. 
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     * So, Release function of the operation should be called when operation 
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     * is not needed anymore.
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     *
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     * @param aPurchaseOption The purchase option that is used for purchasing.
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     * @param aObserver Observer for the operation.
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     * @return Pointer to an operation that can 
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     *         be used to check the progressing of the purchase operation. Counted,
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     *         Release() must be called after use.
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     * @exception Leave with KNcdErrorObsolete if the given purchase option
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     *            is obsolete.
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     *            Leave with KNcdErrorSubscriptionNotSubscribableAnymore
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     *            if the validity time, which indicates that the subscription
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     *            is subscribable, has already passed.
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     *            Leave with KNcdErrorParallelOperationNotAllowed if a parallel
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     *            client is running an operation for the same metadata. See
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     *            MNcdOperation for full explanation.
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     *            Else leave with system wide error code.
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     */
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    virtual MNcdPurchaseOperation* PurchaseL(
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        MNcdPurchaseOption& aPurchaseOption,
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        MNcdPurchaseOperationObserver& aObserver ) = 0;
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    /**
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     * Tells if the node is already purchased.
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     *
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     * 
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     * @return ETrue if purchased, EFalse otherwise.
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     */
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    virtual TBool IsPurchased() const = 0;
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    /**
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     * Returns the purchased purchase option.
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     *
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     * @note Valid only when IsPurchased() returns ETrue.
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     *
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     * @return Purchase option of the last successful purchase. NULL if
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     *  node has not been purchased. Counted, Release() must be called
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     *  after use.
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     * @exception Leave System wide error code.
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     */
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    virtual MNcdPurchaseOption* PurchasedOptionL() const = 0;
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    /**
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     * Gives the time of the purchase if the node has been purchased.
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     * Time given is in universal time.
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     *
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     * @note Valid only when IsPurchased() returns ETrue.
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     *
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     * @return Time of the purchase in universal time.
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     * @exception KErrNotFound If the node has not been purchased.
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     * @exception Leave System wide error codes.
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     */
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    virtual TTime TimeOfPurchaseL() const = 0;
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    /**
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     * Gives the final price paid when the node was purchased.
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     *
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     * @note Valid only when IsPurchased() returns ETrue.
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     *
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     * @return Final price of the purchase.
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     * @exception KErrNotFound If the node has not been purchased.
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     * @exception Leave System wide error codes.
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     */
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    virtual const TDesC& PurchasedPriceL() const = 0;
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protected:
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    /**
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    * Destructor.
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    *
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    * @see MCatalogsBase::~MCatalogsBase
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    */
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    virtual ~MNcdNodePurchase() {}
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    };
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#endif // M_NCD_NODE_PURCHASE_H