/*

* Copyright (c) 2008 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:  

*

*/

#include "svtphonenumbervalidator.h"

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

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

// SvtPhoneNumberValidator::IsValidNumber

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

//

TBool SvtPhoneNumberValidator::IsValidNumber( const TDesC& aCandidate )

    {

    if ( aCandidate.Length() != 0 

            && AreStartCharactersValid( aCandidate )

            && ContainsValidCharacters( aCandidate ) )

        {

        return ETrue;

        }

    else

        {

        return EFalse;

        }

    }

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

// SvtPhoneNumberValidator::ContainsValidCharacters

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

//

TBool SvtPhoneNumberValidator::ContainsValidCharacters( 

        const TDesC& aCandidate )

    {

    _LIT( KAllowedCharsInPhoneNumber, "0123456789*+pw#PW" );

    TLex input( aCandidate );

    TPtrC validChars( KAllowedCharsInPhoneNumber );

    while ( validChars.Locate( input.Peek() ) != KErrNotFound )

        {

        input.Inc();

        }

    return ( !input.Remainder().Length() );

    }

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

// SvtPhoneNumberValidator::AreStartCharactersValid

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

//

TBool SvtPhoneNumberValidator::AreStartCharactersValid( 

        const TDesC& aCandidate )

    {

    TBool isValidStart( ETrue );

    TChar firstChar  = '0';

    TChar secondChar = '0';

    TInt candidateLength( aCandidate.Length() );

    if ( 0 < candidateLength )

        {

        firstChar = aCandidate[0];

        firstChar.LowerCase();

        }

    if ( 1 < candidateLength )

        {

        secondChar = aCandidate[1];

        secondChar.LowerCase();

        }

    if ( firstChar == 'p' || firstChar == 'w' )

        {

        isValidStart = EFalse;

        }

    if ( ( firstChar == '+' && secondChar == '+' ) ||

         ( firstChar == '+' && secondChar == 'p' ) ||

         ( firstChar == '+' && secondChar == 'w' ) )

        {

        isValidStart = EFalse;

        }

    return isValidStart;

    }