/*

* Copyright (c) 2007-2009 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:  ESMR policymmanager implementation

*

*/

#include "emailtrace.h"

#include "cmrpolicyresourceiterator.h"

//<cmail>

#include "cesmrpolicy.h"

#include <esmrpolicies.rsg>

#include "esmrdef.h"

//</cmail>

#include "esmrinternaluid.h"

#include "cesmrcalimportexporter.h"

#include "tesmrentryfield.h"

#include <coemain.h>// CCoeEnv

#include <barsread.h>

/// Unnamed namespace for local definitions

namespace {

// Definition for resource id array granularity

const TInt KMRPolicyIdArrayGranularity = 4;

/**

 * Reads ESMR policy resource id table from resource.

 *

 * @param aReader Reference to resource reader.

 * @param aResourceIdTable Reference to resource id table.

 */

void ReadResourceIdArrayL(

        TResourceReader& aReader,

        RArray<TInt>& aResourceIdTable )

    {

    TInt numOfFields = aReader.ReadInt16();

    aResourceIdTable.ReserveL( numOfFields );

    for (TInt i = 0; i < numOfFields; ++i )

        {

        TInt resourceId= aReader.ReadInt32();

        aResourceIdTable.AppendL(resourceId);

        }

    }

#ifdef _DEBUG

_LIT( KPanicCategory, "MR Policy Resource Iterator" );

enum TMRPolicyResourceIteratorPanic

    {

    EMRPolicyIteratorExhausted = 0

    };

void Panic( TMRPolicyResourceIteratorPanic aPanic )

    {

    User::Panic( KPanicCategory, aPanic );

    }

#endif

}  // namespace

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::CMRPolicyResourceIterator

// ---------------------------------------------------------------------------

//

inline CMRPolicyResourceIterator::CMRPolicyResourceIterator()

    : iPolicyResourceIds( KMRPolicyIdArrayGranularity ),

      iArrayIndex( KErrNotFound )

    {

    FUNC_LOG;

    //do nothing

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::~CMRPolicyResourceIterator

// ---------------------------------------------------------------------------

//

EXPORT_C CMRPolicyResourceIterator::~CMRPolicyResourceIterator()

    {

    FUNC_LOG;

    iPolicyResourceFile.Close();

    iPolicyResourceIds.Close();

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::NewL

// ---------------------------------------------------------------------------

//

EXPORT_C CMRPolicyResourceIterator* CMRPolicyResourceIterator::NewL(

        const TDesC& aResourceFile,

        TInt aResourceId )

    {

    FUNC_LOG;

    CMRPolicyResourceIterator* self = new (ELeave) CMRPolicyResourceIterator;

    CleanupStack::PushL( self );

    self->ConstructL( aResourceFile,

                      aResourceId );

    CleanupStack::Pop(self);

    return self;

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::ConstructL

// ---------------------------------------------------------------------------

//

void CMRPolicyResourceIterator::ConstructL(

        const TDesC& aResourceFile,

        TInt aResourceId)

    {

    FUNC_LOG;

    ReadPolicyFromResourceL( aResourceFile, aResourceId );

    }

// -----------------------------------------------------------------------------

// CMRPolicyResourceIterator::HasNext

// -----------------------------------------------------------------------------

//

EXPORT_C TBool CMRPolicyResourceIterator::HasNext() const

    {

    return ( iArrayIndex < iPolicyResourceIds.Count() - 1 );

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::NextPolicyL

// ---------------------------------------------------------------------------

//

EXPORT_C CESMRPolicy* CMRPolicyResourceIterator::NextPolicyL()

    {

    FUNC_LOG;

    CESMRPolicy* policy = NextPolicyLC();

    CleanupStack::Pop( policy );

    return policy;

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::NextPolicyLC

// ---------------------------------------------------------------------------

//

EXPORT_C CESMRPolicy* CMRPolicyResourceIterator::NextPolicyLC()

    {

    FUNC_LOG;

    __ASSERT_DEBUG( HasNext(), Panic( EMRPolicyIteratorExhausted ) );

    CESMRPolicy* policy = ReadPolicyLC( iPolicyResourceIds[ ++iArrayIndex ] );

    return policy;

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::Reset

// ---------------------------------------------------------------------------

//

EXPORT_C void CMRPolicyResourceIterator::Reset()

    {

    FUNC_LOG;

    iArrayIndex = KErrNotFound;

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::ReadPolicyFromResourceL

// ---------------------------------------------------------------------------

//

void CMRPolicyResourceIterator::ReadPolicyFromResourceL(

        const TDesC& aPolicyFile,

        TInt aPolicyArrayResourceId )

    {

    FUNC_LOG;

    iPolicyResourceFile.Close();

    iPolicyResourceFile.OpenL( CCoeEnv::Static()->FsSession(), aPolicyFile );

    iPolicyResourceFile.ConfirmSignatureL();

    // R_ESMR_POLICIES

    HBufC8* resourceIdBuffer =

        iPolicyResourceFile.AllocReadLC( aPolicyArrayResourceId );

    // Construct resource reader

    TResourceReader reader;

    reader.SetBuffer(resourceIdBuffer);

    // Read policy resource ids

    iPolicyResourceIds.Reset();

    ReadResourceIdArrayL(reader, iPolicyResourceIds );

    CleanupStack::PopAndDestroy( resourceIdBuffer );

    }

// ---------------------------------------------------------------------------

// CMRPolicyResourceIterator::ReadPolicyL

// ---------------------------------------------------------------------------

//

CESMRPolicy* CMRPolicyResourceIterator::ReadPolicyLC( TInt aResourceId )

    {

    FUNC_LOG;

    HBufC8* resourceBuffer = iPolicyResourceFile.AllocReadLC( aResourceId );

    TResourceReader reader;

    reader.SetBuffer(resourceBuffer);

    CESMRPolicy* policy = CESMRPolicy::NewL( iPolicyResourceFile, reader );

    CleanupStack::PopAndDestroy( resourceBuffer );

    CleanupStack::PushL( policy );

    return policy;

    }

// EOF