/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Mobility Components.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qvcard30writer_p.h"

#include "versitutils_p.h"

#include "qmobilityglobal.h"

#include <QTextCodec>

#include <QBuffer>

QTM_USE_NAMESPACE

/*! Constructs a writer. */

QVCard30Writer::QVCard30Writer()

    : QVersitDocumentWriter(QByteArray("VCARD"),QByteArray("3.0"))

{

    mPropertyNameMappings.insert(

        QLatin1String("X-NICKNAME"),QLatin1String("NICKNAME"));

    mPropertyNameMappings.insert(

        QLatin1String("X-IMPP"),QLatin1String("IMPP"));

}

/*! Destroys a writer. */

QVCard30Writer::~QVCard30Writer()

{

}

/*!

 * Encodes the \a property and writes it to the device.

 */

void QVCard30Writer::encodeVersitProperty(const QVersitProperty& property)

{

    QVersitProperty modifiedProperty(property);

    QString name = mPropertyNameMappings.value(property.name(),property.name());

    modifiedProperty.setName(name);

    encodeGroupsAndName(modifiedProperty);

    QVariant variant(modifiedProperty.variantValue());

    if (variant.type() == QVariant::ByteArray) {

        modifiedProperty.insertParameter(QLatin1String("ENCODING"), QLatin1String("b"));

    }

    encodeParameters(modifiedProperty.parameters());

    writeString(QLatin1String(":"));

    QString renderedValue;

    if (variant.canConvert<QVersitDocument>()) {

        QVersitDocument embeddedDocument = variant.value<QVersitDocument>();

        QByteArray data;

        QBuffer buffer(&data);

        buffer.open(QIODevice::WriteOnly);

        QVCard30Writer subWriter;

        subWriter.setCodec(mCodec);

        subWriter.setDevice(&buffer);

        subWriter.encodeVersitDocument(embeddedDocument);

        QString documentString(mCodec->toUnicode(data));

        backSlashEscape(documentString);

        renderedValue = documentString;

    } else if (variant.type() == QVariant::String) {

        renderedValue = variant.toString();

        backSlashEscape(renderedValue);

    } else if (variant.type() == QVariant::StringList) {

        // We need to backslash escape and concatenate the values in the list

        QStringList values = property.variantValue().toStringList();

        QString separator;

        if (property.valueType() == QVersitProperty::CompoundType) {

            separator = QLatin1String(";");

        } else {

            if (property.valueType() != QVersitProperty::ListType) {

                qWarning("Variant value is a QStringList but the property's value type is neither "

                         "CompoundType or ListType");

            }

            // Assume it's a ListType

            separator = QLatin1String(",");

        }

        bool first = true;

        foreach (QString value, values) {

            if (!(value.isEmpty() && property.valueType() == QVersitProperty::ListType)) {

                if (!first) {

                    renderedValue += separator;

                }

                backSlashEscape(value);

                renderedValue += value;

                first = false;

            }

        }

    } else if (variant.type() == QVariant::ByteArray) {

        renderedValue = QLatin1String(variant.toByteArray().toBase64().data());

    }

    writeString(renderedValue);

    writeCrlf();

}

/*!

 * Encodes the \a parameters and writes it to the device.

 */

void QVCard30Writer::encodeParameters(const QMultiHash<QString,QString>& parameters)

{

    QList<QString> names = parameters.uniqueKeys();

    foreach (QString nameString, names) {

        writeString(QLatin1String(";"));

        QStringList values = parameters.values(nameString);

        backSlashEscape(nameString);

        writeString(nameString);

        writeString(QLatin1String("="));

        for (int i=0; i<values.size(); i++) {

            if (i > 0)

                writeString(QLatin1String(","));

            QString value = values.at(i);

            backSlashEscape(value);

            writeString(value);

        }

    }

}

/*!

 * Performs backslash escaping for line breaks (CRLFs), semicolons, backslashes and commas according

 * to RFC 2426.  This is called on parameter names and values and property values.

 * Colons ARE NOT escaped because the examples in RFC2426 suggest that they shouldn't be.

 */

void QVCard30Writer::backSlashEscape(QString& text)

{

    /* replaces ; with \;

                , with \,

                \ with \\

     */

    text.replace(QRegExp(QLatin1String("([;,\\\\])")), QLatin1String("\\\\1"));

    // replaces any CRLFs with \n

    text.replace(QRegExp(QLatin1String("\r\n|\r|\n")), QLatin1String("\\n"));

}