/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*      Implementation of CBookmarkFileImporter.

*      

*

*/

// INCLUDE FILES

#include "BookmarkFileImporter.h"

// TEMP

#include <s32file.h>

// END TEMP

// CONSTANTS

/// ',' character.

LOCAL_C const TUint KComma = ',';

/// '#' character.

LOCAL_C const TUint KHash = '#';

/// EOF (0) character.

LOCAL_C const TUint KEof = 0;

/// '\r' character.

LOCAL_C const TUint KCr = '\r';

/// '\n' character.

LOCAL_C const TUint KLf = '\n';

/// LF-EOF stop token set.

_LIT( KStopLfEof, "\n\0" );

/// Comma stop token set.

_LIT( KStopComma, "," );

/// Comma-LF-EOF stop token set.

_LIT( KStopCommaLfEof, ",\n\0" );

/// "Folder" kewyword.

_LIT( KFolder, "Folder" );

/// "Item" kewyword.

_LIT( KItem, "Item" );

/// "Homepage" kewyword.

_LIT( KHomepage, "Homepage" );

/// "LastVisited" kewyword.

_LIT( KLastVisited, "LastVisited" );

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

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

// CBookmarkFileImporter::NewLC

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

//

CBookmarkFileImporter* CBookmarkFileImporter::NewL()

    {

    CBookmarkFileImporter* importer = new (ELeave) CBookmarkFileImporter();

    CleanupStack::PushL( importer );

    importer->ConstructL();

    CleanupStack::Pop();    // importer

    return importer;

    }

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

// CBookmarkFileImporter::~CBookmarkFileImporter

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

//

CBookmarkFileImporter::~CBookmarkFileImporter()

    {

    delete iBuf;

    iFile.Close();

    iFs.Close();

    delete iItem;

    iDb.Close();

    iSess.Close();

    }

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

// CBookmarkFileImporter::ImportL

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

//

void CBookmarkFileImporter::ImportL( const TDesC& aFileName )

    {

    User::LeaveIfError( iFile.Open( iFs, aFileName,

        EFileRead | EFileShareReadersOnly ) );

    CleanupClosePushL<RUnicodeFile>( iFile );

    User::LeaveIfError( iDb.Open( iSess, KBrowserBookmarks ) );

    // Import is done in a transaction - all or nothing.

    User::LeaveIfError( iDb.Begin( /*aWrite=*/ETrue ) );

    iDb.CleanupRollbackPushL();

    GetCharL();

    while( NextLineL() );

    User::LeaveIfError( iDb.Commit() );

    CleanupStack::Pop();            // the rollback

    CleanupStack::PopAndDestroy();  // close iFile

    }

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

// CBookmarkFileImporter::CBookmarkFileImporter

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

//

CBookmarkFileImporter::CBookmarkFileImporter()

    {

    }

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

// CBookmarkFileImporter::ConstructL

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

//

void CBookmarkFileImporter::ConstructL()

    {

    User::LeaveIfError( iSess.Connect() );

    iItem = CFavouritesItem::NewL();

    User::LeaveIfError( iFs.Connect() );

    iBuf = new (ELeave) TText16[KFavouritesMaxUrl];

    iMaxCh = iBuf + KFavouritesMaxUrl;

    }

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

// CBookmarkFileImporter::GetCharL

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

//

void CBookmarkFileImporter::GetCharL()

    {

    iCurCh = iFile.GetCharL();

    if ( iCurCh == KCr )

        {

        // CR character found - ignore it. Not expecting CR to appear anywhere

        // else than before an LF.

        iCurCh = iFile.GetCharL();

        }

    }

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

// CBookmarkFileImporter::NextLineL

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

//

TBool CBookmarkFileImporter::NextLineL()

    {

    switch( iCurCh )

        {

        case KEof:

            // EOF

            return EFalse;

        case KHash:

            // Comment line; skip over.

            SkipL( KStopLfEof );

            GetCharL();

            break;

        case KCr:

        case KLf:

            // Empty line; skip over.

            GetCharL();

            break;

        default:

            // Parse bookmark attributes.

            AttrsL();

            break;

        }

    return ETrue;

    }

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

// CBookmarkFileImporter::NextTokenL

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

//

TPtrC CBookmarkFileImporter::NextTokenL( const TDesC& aStopCharSet )

    {

    iNextCh = iBuf; // Start storing token at start of buffer.

    while ( iNextCh < iMaxCh )

        {

        if ( aStopCharSet.Locate( iCurCh ) != KErrNotFound )

            {

            // Stop character found - return what we have stored so far. This

            // may be an empty string as well.

            return TPtrC( iBuf, iNextCh - iBuf );

            }

        *iNextCh = STATIC_CAST( TText16, iCurCh );

        iNextCh++;

        GetCharL();

        }

    // No more space in buffer to store token.

    User::Leave( KErrOverflow );

    /*NOTREACHED*/

    return TPtrC();

    }

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

// CBookmarkFileImporter::NextIntTokenL

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

//

TInt CBookmarkFileImporter::NextIntTokenL( const TDesC& aStopCharSet )

    {

    TInt ret = 0;

    TPtrC token( NextTokenL( aStopCharSet ) );

    if ( token.Length() )

        {

        TLex lex( token );

        User::LeaveIfError( lex.Val( ret ) );

        }

    return ret;

    }

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

// CBookmarkFileImporter::NextHexTokenL

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

//

TInt32 CBookmarkFileImporter::NextHexTokenL( const TDesC& aStopCharSet )

    {

    TUint32 ret = 0;

    TPtrC token( NextTokenL( aStopCharSet ) );

    if ( token.Length() )

        {

        TLex lex( token );

        User::LeaveIfError( lex.Val( ret, EHex ) );

        }

    return STATIC_CAST( TInt32, ret );

    }

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

// CBookmarkFileImporter::SkipL

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

//

void CBookmarkFileImporter::SkipL( const TDesC& aStopCharSet )

    {

    // Note that EOF also can be a stop character; aStopChar check has

    // precendence over EOF check. That is the 'expected EOF' case.

    while( aStopCharSet.Locate( iCurCh ) == KErrNotFound )

        {

        if ( iCurCh == KEof )

            {

            // Unexpected EOF.

            User::Leave( KErrEof );

            }

        GetCharL();

        }

    }

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

// CBookmarkFileImporter::AttrsL

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

//

void CBookmarkFileImporter::AttrsL()

    {

    TPtrC token;

    TInt num;

    TBool readOnly( EFalse );

    TBool factoryItem( ETrue );

    TBool homePage( EFalse );

    TBool lastVisited( EFalse );

    TBool preferred( EFalse );

    // Parse the line and fill item.

    iItem->ClearL();

    // Type (including special items).

    token.Set( NextTokenL( KStopComma ) );

    if ( !token.Compare( KFolder ) )

        {

        iItem->SetType( CFavouritesItem::EFolder );

        }

    else if ( !token.Compare( KItem ) )

        {

        iItem->SetType( CFavouritesItem::EItem );

        }

    else if ( !token.Compare( KHomepage ) )

        {

        iItem->SetType( CFavouritesItem::EItem );

        homePage = ETrue;

        }

    else if ( !token.Compare( KLastVisited ) )

        {

        iItem->SetType( CFavouritesItem::EItem );

        lastVisited = ETrue;

        }

    else

        {

        // Expected "Folder", "Item", "Homepage" or "LastVisited".

        User::Leave( KErrCorrupt );

        }

    GetCharL();

    // Name.

    iItem->SetNameL( NextTokenL( KStopComma ) );

    GetCharL();

    // Parent folder.

    iItem->SetParentFolder( FolderByNameL( NextTokenL( KStopComma ) ) );

    GetCharL();

    // URL.

    iItem->SetUrlL( NextTokenL( KStopComma ) );

    GetCharL();

    // WAP AP.

    num = NextIntTokenL( KStopComma );

    if( num )

        {

        TFavouritesWapAp ap;

        ap = num;

        iItem->SetWapAp( ap );

        }

    GetCharL();

    // User name.

    iItem->SetUserNameL( NextTokenL( KStopComma ) );

    GetCharL();

    // Password.

    iItem->SetPasswordL( NextTokenL( KStopComma ) );

    GetCharL();

    // Read-only flag.

    num = NextIntTokenL( KStopComma );

    if ( num == 0 )

        {

        readOnly = EFalse;

        }

    else if ( num == 1 )

        {

        readOnly = ETrue;

        }

    else

        {

        // Expected "0" or "1".

        User::Leave( KErrCorrupt );

        }

    GetCharL();

    // Factory item flag.

    num = NextIntTokenL( KStopComma );

    if ( num == 0 )

        {

        factoryItem = EFalse;

        }

    else if ( num == 1 )

        {

        factoryItem = ETrue;

        }

    else

        {

        // Expected "0" or "1".

        User::Leave( KErrCorrupt );

        }

    GetCharL();

    // Context id.

    iItem->SetContextId( NextHexTokenL( KStopCommaLfEof ) );

    // No GetCharL yet - PreferredUid is optional, so we need to investigate

    // lookeahed character first.

    // Preferred flag (optional).

    if ( iCurCh == KComma )

        {

        GetCharL();

        num = NextIntTokenL( KStopLfEof );

        if ( num == 0 )

            {

            preferred = EFalse;

            }

        else if ( num == 1 )

            {

            preferred = ETrue;

            }

        else

            {

            // Expected "0" or "1".

            User::Leave( KErrCorrupt );

            }

        }

    GetCharL();

    // Add item and set flags.

    if ( homePage )

        {

        User::LeaveIfError( iDb.SetHomepage( *iItem ) );

        }

    else if ( lastVisited )

        {

        User::LeaveIfError( iDb.SetLastVisited( *iItem ) );

        }

    else

        {

        User::LeaveIfError( iDb.Add( *iItem, /*aAutoRename=*/EFalse ) );

        }

    User::LeaveIfError( iDb.SetReadOnly( iItem->Uid(), readOnly ) );

    User::LeaveIfError( iDb.SetFactoryItem( iItem->Uid(), factoryItem ) );

    if ( preferred )

        {

        User::LeaveIfError( iDb.SetPreferredUid

            ( iItem->ParentFolder(), iItem->Uid() ) );

        }

    }

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

// CBookmarkFileImporter::FolderByNameL

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

//

TInt CBookmarkFileImporter::FolderByNameL( const TDesC& aName )

    {

    TInt folder = KFavouritesRootUid;

    if ( aName.Length() )

        {

        CArrayFix<TInt>* uids = new (ELeave) CArrayFixFlat<TInt>( 1 );

        CleanupStack::PushL( uids );

        User::LeaveIfError( iDb.GetUids

            (

            *uids,

            KFavouritesNullUid,

            CFavouritesItem::EFolder,

            &aName,

            KFavouritesNullContextId

            ) );

        if( uids->Count() == 0 )

            {

            User::Leave( KErrNotFound );

            }

        if( uids->Count() == 1 )

            {

            folder = uids->At( 0 );

            }

        else

            {

            // This would worth a panic - more folders with the same name?

            User::Leave( KErrCorrupt );

            }

        CleanupStack::PopAndDestroy();  // uids

        }

    return folder;

    }