/*

* Copyright (c) 2007 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: This file defines class CIpsPlgMruList.

*

*/

#ifndef IPSPLGMRULIST_H

#define IPSPLGMRULIST_H

const TUid KCRUidIpsSosMru = { 0x20010128 };

/**

 *  Most recent used name and address store

 *

 *  Reads and writes most recent used email addresses to central

 *  repository. Central repository stores key - value -pairs. In this

 *  case, first 16 bits of a key is used to identify mailbox and last 16

 *  bits makes key unique for name and address information. Example:

 *

 *  Key         Value

 *  0000 0000   <mailboxId1>                     : integer

 *  0000 0001   <1. name of mailboxid1>          : descriptor

 *  0000 0002   <1. email addr of mailboxid1>    : descriptor

 *  0000 0003   <2. name of mailboxid1>          : descriptor

 *  0000 0004   <2. email addr of mailbodid1>    : descriptor

 *  .... ....

 *  .... ....

 *  0001 0000   <mailboxId2>                     : integer

 *  0001 0001   <1. email addr of mailboxid2>    : descriptor

 *  0001 0002   <1. email addr of mailboxid2>    : descriptor

 *  .... ....

 *  .... ....

 *  FFFF 0000   <mailboxIdFFFF+1>                : integer

 *  FFFF 0001   <1. email addr of mailboxIdNNNN> : descriptor

 *  FFFF 0002   <1. email addr of mailboxIdNNNN> : descriptor

 *

 *  @lib ipssosplugin.lib

 *  @since

 */

class CIpsPlgMruList : public CBase

    {

public:

    /**

     * Two-phased constructor.

     */

     static CIpsPlgMruList* NewL( );

    /**

     * Destructor.

     */

    virtual ~CIpsPlgMruList();

    /**

     * Reads last used contacts from centrep and return

     * array of descriptors that contains data. Data is read

     * from cache if not changed in centrep. On error situation

     * return empty descriptor array.

     *

     * @param aMailbox unique mailbox id

     * @return  descriptor array

     * @since FS 1.0

     */

    CDesCArrayFlat* GetMruListL( const TFSMailMsgId& aMailbox );

    /**

     * Writes last used contacts to centrep.

     * On error all data consern mailbox is cleared from centrep

     *

     * @param aMailbox unique mailbox id

     * @param aNewMruList contact descriptor array

     * @since FS 1.0

     */

    void SetMruListL( const TFSMailMsgId& aMailBoxId,

        MDesCArray* aNewMruList );

    /**

     * Cleares all data stored under mailbox id

     *

     * @param aMailbox unique mailbox id

     * @since FS 1.0

     */

    void ClearDataL( const TFSMailMsgId& aMailBoxId );

private:

    /**

     * Constructor

     */

    CIpsPlgMruList( );

    /**

     * Constructor for leaving methods

     */

    void ConstructL( );

    /**

     * Reads descriptor identified by aKey from centrep

     *

     * @param aKey centrep key for descriptor

     * @return KErrCorrupt or error from centrep transaction

     */

    TInt StoreToArrayL(TUint32 aKey);

    /**

     * Read all mailbox keys from centrep to array

     * finds key that contains mailboxid

     *

     * @param aMboxId mailbox id key to be finded

     * @param aMboxKey correct key or invalid key if mailbox id not

     *                 founded from centrep

     * @param aArray array where all mailbox keys will be stored

     * @return KErrNone or KErrNotFound

     */

    TInt GetMailboxKeyFromRepositoryL(

        TInt aMboxId,

        TUint32& aMboxKey,

        RArray<TUint32>& aArray );

    /**

     * inline for creating iRepository, for performance reasons

     * not created in constructl

     */

    inline static void CreateRepositoryL( CRepository*& aRep );

    /**

     * Find smallest key that not founded in array

     *

     * @param aKeys set of keys which is sorted in fuction

     * @return unique key

     */

    TUint32 GetUnusedMboxKey( RArray<TUint32>& aKeys );

    /**

     * Find smallest key that not founded in array

     *

     * @param aMboxKey mailbox key which data error conserns

     * @param aError system wide error code

     */

    void HandleRepositoryError( TUint32 aMboxKey, TInt aError );

private: // data

    // Mru list repository instance

    CRepository*            iRepository;

    // array for repository data

    RPointerArray<HBufC>    iHbufArray;

    // array for repository keys

    RArray<TUint32>         iKeys;

    };

// inline for centrep object creation

inline void CIpsPlgMruList::CreateRepositoryL( CRepository*& aRep )

    {

    if ( !aRep )

        {

        // real uid needed

        aRep = CRepository::NewL( KCRUidIpsSosMru );

        }

    }

#endif // IPSPLGMRULIST_H

// End of file