/*

* 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 implements class CIpsPlgMruList.

*

*/

#include "emailtrace.h"

#include "ipsplgheaders.h"

const TUint32 KMruListMailboxMask = 0x0000FFFF;

const TUint32 KMruListMailboxPartKey = 0x0;

const TUint32 KMruListValueMask = 0xFFFF0000;

const TUint32 KMruListIncorrectMBoxKey = 0xFFFFFFFF;

const TUint32 KMruListKeyBaseValue = 0x00010000;

// what are actual size in Freestyle framework?

const TInt KMruListPrefDesSize = 40;

const TInt KMruListMaxDesSize = 200;

const TInt KMruListArrayInitSize = 8;

// <cmail>

const TInt KIpsSmtpOperationCharLessThan = '<';

const TInt KIpsSmtpOperationCharMoreThan = '>';

// </cmail>

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

// CIpsPlgMruList::NewL( )

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

//

CIpsPlgMruList* CIpsPlgMruList::NewL( )

    {

    FUNC_LOG;

    CIpsPlgMruList* self = new( ELeave ) CIpsPlgMruList( );

    CleanupStack::PushL( self );

    self->ConstructL( );

    CleanupStack::Pop( self );

    return self;

    }

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

// CIpsPlgMruList::~CIpsPlgMruList()

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

//

CIpsPlgMruList::~CIpsPlgMruList()

    {

    FUNC_LOG;

    delete iRepository;

    iHbufArray.ResetAndDestroy();

    iHbufArray.Close();

    iKeys.Reset();

    iKeys.Close();

    }

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

// CIpsPlgMruList::CIpsPlgMruList()

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

//

CIpsPlgMruList::CIpsPlgMruList( )

    : iRepository( NULL )

    {

    FUNC_LOG;

    }

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

// CIpsPlgMruList::ConstructL( )

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

//

void CIpsPlgMruList::ConstructL( )

    {

    FUNC_LOG;

    }

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

// CIpsPlgMruList::GetMruListL

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

//

CDesCArrayFlat* CIpsPlgMruList::GetMruListL( const TFSMailMsgId& aMailbox )

    {

    FUNC_LOG;

    // create iRepository if not yet created

    CreateRepositoryL( iRepository );

    TBool returnEmpty( EFalse );

    // Do not cache anything, there are multiple plugin instances

    iKeys.Reset();

    TUint32 mboxKey;

    if ( KErrNone != GetMailboxKeyFromRepositoryL( aMailbox.Id(), mboxKey, iKeys ) )

        {

        returnEmpty = ETrue;

        }

    iKeys.Reset();

    // get correct mailbox key and fill corresponding name and address keys

    // in keys array

    if ( !returnEmpty )

        {

        if ( KErrNone != iRepository->FindL( mboxKey, KMruListValueMask, iKeys ) )

            {

            returnEmpty = ETrue;

            }

        }

    // if we have found correct key find all keys that

    // maches pattern 0xMKEY**** key array should contain

    // at least 3 items, and size shoud be odd

    // or array is empty or corrupted

    TInt keyCount( iKeys.Count() );

    if ( !returnEmpty && keyCount >= 3 && ( keyCount%2 ) == 1 )

        {

        iHbufArray.ResetAndDestroy();

        iKeys.SortUnsigned();

        TInt i(0);

        // first item in array should be mbox key

        if ( iKeys[0] == mboxKey )

            {

            // index to first name key

            i = 1;

            // store name and address in one loop cycle

            while ( !returnEmpty && i <= ( keyCount-2 ) )

                {

                TUint key = iKeys[i];

                // name is always in odd and address in even key

                if ( (key%2==1) && (iKeys[i+1]==key+1) )

                    {

                    // adding name and email to hbuf array

                    if ( StoreToArrayL(iKeys[i]) != KErrNone )

                        {

                        // something went wrong in name store

                        // just break the loop and return empty

                        HandleRepositoryError( mboxKey, KErrCorrupt );

                        returnEmpty = ETrue;

                        }

                    if ( StoreToArrayL(iKeys[i+1]) != KErrNone )

                        {

                        // store is corrupted

                        HandleRepositoryError( mboxKey, KErrCorrupt );

                        returnEmpty = ETrue;

                        }

                    }

                i = i+2;

                }

            }

        else

            {

            // first item was not mailbox key

            // centrep data is corrupted

            HandleRepositoryError( mboxKey, KErrCorrupt );

            returnEmpty = ETrue;

            }

        }

    else if ( !returnEmpty )

        {

        // mailbox found but there is no data or centrep is corrupted,

        // return empty

        HandleRepositoryError( mboxKey, KErrCorrupt );

        returnEmpty = ETrue;

        }

    // create and return des array

    CDesCArrayFlat* retArr = NULL;

    if ( !returnEmpty )

        {

        retArr = new ( ELeave ) CDesCArrayFlat( KMruListArrayInitSize );

        CleanupStack::PushL( retArr );

        TInt count( iHbufArray.Count() );

        // fill descriptor array

        for ( TInt i(0); i < count; i++ )

            {

            HBufC* app = iHbufArray[i];

            retArr->AppendL(*app);

            }

        CleanupStack::Pop( retArr );

        }

    else

        {

        iHbufArray.ResetAndDestroy();

        retArr = new ( ELeave ) CDesCArrayFlat( KMruListArrayInitSize );

        }

    return retArr;

    }

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

// CIpsPlgMruList::SetMruListL

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

//

void CIpsPlgMruList::SetMruListL( const TFSMailMsgId& aMailBoxId,

    MDesCArray*  aNewMruList )

    {

    FUNC_LOG;

    // create iRepository if not yet created

    CreateRepositoryL( iRepository );

    TUint32 mboxKey = KMruListIncorrectMBoxKey;

    iKeys.Reset();

    // get mailbox keys to keys array and

    // check if mailboxid is already stored in some key

    TInt error = GetMailboxKeyFromRepositoryL(

        aMailBoxId.Id(), mboxKey, iKeys );

    if ( KErrNone == error )

        {

        // mailbox found

        TUint32 errorKey;

        error = iRepository->Delete( mboxKey, KMruListValueMask, errorKey );

        HandleRepositoryError( mboxKey, error );

        }

    else

        {

        // mailbox not found, create new key

        mboxKey = GetUnusedMboxKey( iKeys );

        }

    // set new values to central repository

    // create mailboxid key

    error = iRepository->Create( mboxKey, TInt( aMailBoxId.Id() ) );

    // handle error

    TInt count( aNewMruList->MdcaCount() );

    // <cmail>

    for ( TInt i(0); error == KErrNone && i < count; i += 2 )

        {

        if( i + 1 < count )

            {

            TPtrC displayName  = aNewMruList->MdcaPoint(i);

            TPtrC emailAddress = aNewMruList->MdcaPoint(i + 1);

            // Need to locate angle brackets from end of the data, if there

            // is display name with special characters

            TInt start( emailAddress.LocateReverse( KIpsSmtpOperationCharLessThan ) ); 

            TInt end( emailAddress.LocateReverse( KIpsSmtpOperationCharMoreThan ) );

                {

                start += 1;

                emailAddress.Set( aNewMruList->MdcaPoint(i + 1).Mid( start, ( end - start ) ) );

                }

            // check validity of email before saving diplay name and address

            if( IpsSetUtils::IsValidEmailAddressL(emailAddress) )

                {

                // set values to ascending keys

                mboxKey++;

                if ( aNewMruList->MdcaPoint(i).Length() <= KMruListMaxDesSize )

                    {

                    error = iRepository->Create( mboxKey, aNewMruList->MdcaPoint(i) );

                    // handle errors

                    }

                else

                    {

                    TDesC des = aNewMruList->MdcaPoint(i);

                    error = iRepository->Create(

                        mboxKey, des.Mid(0,KMruListMaxDesSize) );

                    }

                mboxKey++;

                if( error == KErrNone )

                    {

                    if ( aNewMruList->MdcaPoint(i + 1).Length() <= KMruListMaxDesSize )

                        {

                        error = iRepository->Create( mboxKey, aNewMruList->MdcaPoint(i + 1) );

                        }

                    else

                        {

                        TDesC des = aNewMruList->MdcaPoint(i + 1);

                        error = iRepository->Create(

                            mboxKey, des.Mid(0,KMruListMaxDesSize) );

                        }

                    }

                }

            }

        }

    // </cmail>

    if ( KErrNone != error )

        {

        HandleRepositoryError( mboxKey, error );

        }

    }

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

// CIpsPlgMruList::ClearDataL

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

//

void CIpsPlgMruList::ClearDataL( const TFSMailMsgId& aMailBoxId )

	{

    FUNC_LOG;

	CreateRepositoryL( iRepository );

    TUint32 mboxKey = KMruListIncorrectMBoxKey;

    iKeys.Reset();

    // get mailbox keys to keys array and

    // check if mailboxid is already sotred in some key

    TInt error = GetMailboxKeyFromRepositoryL(

        aMailBoxId.Id(), mboxKey, iKeys );

    // we have found correct mboxKey

    if ( KErrNone == error )

        {

        TUint32 errorKey;

        error = iRepository->Delete( mboxKey, KMruListValueMask, errorKey );

        HandleRepositoryError( mboxKey, error );

        }

	}

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

// CIpsPlgMruList::StoreToArrayL

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

//

TInt CIpsPlgMruList::StoreToArrayL( TUint32 aKey )

    {

    FUNC_LOG;

    HBufC* hbuf = HBufC::NewLC( KMruListPrefDesSize );

    TPtr pdes = hbuf->Des();

    TInt actualSize(0);

    TInt error = iRepository->Get( aKey, pdes, actualSize );

    // the case descriptor is larger than pref size

    if ( error == KErrOverflow )

        {

        if ( actualSize > KMruListMaxDesSize )

            {

            // centrep contains too large descriptors

            // impossible if centrep is edited only by this code,

            // set corrupted

            error = KErrCorrupt;

            }

        else

            {

            CleanupStack::PopAndDestroy( hbuf );

            hbuf = HBufC::NewLC( actualSize );

            TPtr pdes2 = hbuf->Des();

            error = iRepository->Get( aKey, pdes2 );

            }

        }

    // add or delete

    if ( KErrNone == error )

        {

        iHbufArray.AppendL( hbuf );

        CleanupStack::Pop( hbuf );

        }

    else

        {

        CleanupStack::PopAndDestroy( hbuf );

        }

    return error;

    }

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

// CIpsPlgMruList::GetMailboxKeyFromRepositoryL

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

//

TInt CIpsPlgMruList::GetMailboxKeyFromRepositoryL(

    TInt aMboxId,

    TUint32& aMboxKey,

    RArray<TUint32>& aArray )

    {

    FUNC_LOG;

    // keys is found from centrep with partkey 0x0 and mask 0x0000FFFF

    // result is array of keys that maches to pattern 0x****0000

    TInt error = iRepository->FindL(

        KMruListMailboxPartKey, KMruListMailboxMask, aArray );

    // No need to handle other errors than not found,

    // this function should only return KErrNone or KErrNotFound

    TInt tempId;

    error = KErrNotFound;

    //find correct mailbox key from array:

    for ( TInt i = 0; error == KErrNotFound && i < aArray.Count(); i++ )

        {

        if ( iRepository->Get( aArray[i], tempId ) == KErrNone

            && tempId == aMboxId )

            {

            aMboxKey = aArray[i];

            error = KErrNone;

            }

        }

    return error;

    }

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

// CIpsPlgMruList::GetUnusedMboxKey

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

//

TUint32 CIpsPlgMruList::GetUnusedMboxKey( RArray<TUint32>& aKeys )

    {

    FUNC_LOG;

    // Warning: this function is complex and may contain bugs!!!

    TUint32 newKey = aKeys.Count()*KMruListKeyBaseValue;

    if ( aKeys.Count() > 1 )

        {

        // this loop finds smallest unused key from sorted key array,

        // if array[i] == i*basekey at every i when i == 0...count-1

        // then newKey is not changed

        aKeys.SortUnsigned();

        TUint32 tempKey = newKey;

        for ( TInt i = 0; tempKey == newKey && i < ( aKeys.Count() - 1); i++ )

            {

            if ( aKeys[i] + KMruListKeyBaseValue != aKeys[i+1] )

                {

                tempKey = aKeys[i] + KMruListKeyBaseValue;

                }

            }

        newKey = tempKey;

        }

    else if ( aKeys.Count() == 1 && aKeys[0] == KMruListKeyBaseValue )

        {

        newKey = 0;

        }

    return newKey;

    }

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

// CIpsPlgMruList::HandleRepositoryError

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

//

void CIpsPlgMruList::HandleRepositoryError( TUint32 aMboxKey, TInt aError )

    {

    FUNC_LOG;

    TBool doClear = EFalse;

    switch ( aError )

        {

            // log these error cases

        case KErrNone:

            // no error

            break;

        case KErrNotFound:

            // no serious error

            break;

        case KErrPermissionDenied:

            // this should be panic because application has no

            // privileges for mru repository

            break;

        case KErrAbort:

            // transaction has previously failed

            // clear mailbox data if it helps...

            doClear = ETrue;

            break;

        case KErrArgument:

            // error in argument, for ex. trying to put integer to descriptor

            // key, solution clear all keys matching aMailbox

            doClear = ETrue;

            break;

        case KErrCorrupt:

            // just clear all keys matching aMailbox

            doClear = ETrue;

            break;

        case KErrAlreadyExists:

            // should handle elsewhere, if ends here clear data

            doClear = ETrue;

            break;

        default:

            // something wrong , clear data

            doClear = ETrue;

            break;

        }

    if ( doClear )

        {

        // don't care about errors...

        TUint32 errorKey;

        TInt error = iRepository->Delete( aMboxKey, KMruListValueMask, errorKey );

        }

    }

// End of file