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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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

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** This file is part of the demonstration applications of the Qt Toolkit.

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** 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.

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** GNU Lesser General Public License Usage

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** 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

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** $QT_END_LICENSE$

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

#include "cookiejar.h"

#include "autosaver.h"

#include <QtCore/QDateTime>

#include <QtCore/QDir>

#include <QtCore/QFile>

#include <QtCore/QMetaEnum>

#include <QtCore/QSettings>

#include <QtCore/QUrl>

#include <QtGui/QCompleter>

#include <QtGui/QDesktopServices>

#include <QtGui/QFont>

#include <QtGui/QFontMetrics>

#include <QtGui/QHeaderView>

#include <QtGui/QKeyEvent>

#include <QtGui/QSortFilterProxyModel>

#include <QtWebKit/QWebSettings>

#include <QtCore/QDebug>

static const unsigned int JAR_VERSION = 23;

QT_BEGIN_NAMESPACE

QDataStream &operator<<(QDataStream &stream, const QList<QNetworkCookie> &list)

{

    stream << JAR_VERSION;

    stream << quint32(list.size());

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

        stream << list.at(i).toRawForm();

    return stream;

}

QDataStream &operator>>(QDataStream &stream, QList<QNetworkCookie> &list)

{

    list.clear();

    quint32 version;

    stream >> version;

    if (version != JAR_VERSION)

        return stream;

    quint32 count;

    stream >> count;

    for(quint32 i = 0; i < count; ++i)

    {

        QByteArray value;

        stream >> value;

        QList<QNetworkCookie> newCookies = QNetworkCookie::parseCookies(value);

        if (newCookies.count() == 0 && value.length() != 0) {

            qWarning() << "CookieJar: Unable to parse saved cookie:" << value;

        }

        for (int j = 0; j < newCookies.count(); ++j)

            list.append(newCookies.at(j));

        if (stream.atEnd())

            break;

    }

    return stream;

}

QT_END_NAMESPACE

CookieJar::CookieJar(QObject *parent)

    : QNetworkCookieJar(parent)

    , m_loaded(false)

    , m_saveTimer(new AutoSaver(this))

    , m_acceptCookies(AcceptOnlyFromSitesNavigatedTo)

{

}

CookieJar::~CookieJar()

{

    if (m_keepCookies == KeepUntilExit)

        clear();

    m_saveTimer->saveIfNeccessary();

}

void CookieJar::clear()

{

    setAllCookies(QList<QNetworkCookie>());

    m_saveTimer->changeOccurred();

    emit cookiesChanged();

}

void CookieJar::load()

{

    if (m_loaded)

        return;

    // load cookies and exceptions

    qRegisterMetaTypeStreamOperators<QList<QNetworkCookie> >("QList<QNetworkCookie>");

    QSettings cookieSettings(QDesktopServices::storageLocation(QDesktopServices::DataLocation) + QLatin1String("/cookies.ini"), QSettings::IniFormat);

    setAllCookies(qvariant_cast<QList<QNetworkCookie> >(cookieSettings.value(QLatin1String("cookies"))));

    cookieSettings.beginGroup(QLatin1String("Exceptions"));

    m_exceptions_block = cookieSettings.value(QLatin1String("block")).toStringList();

    m_exceptions_allow = cookieSettings.value(QLatin1String("allow")).toStringList();

    m_exceptions_allowForSession = cookieSettings.value(QLatin1String("allowForSession")).toStringList();

    qSort(m_exceptions_block.begin(), m_exceptions_block.end());

    qSort(m_exceptions_allow.begin(), m_exceptions_allow.end());

    qSort(m_exceptions_allowForSession.begin(), m_exceptions_allowForSession.end());

    loadSettings();

}

void CookieJar::loadSettings()

{

    QSettings settings;

    settings.beginGroup(QLatin1String("cookies"));

    QByteArray value = settings.value(QLatin1String("acceptCookies"),

                        QLatin1String("AcceptOnlyFromSitesNavigatedTo")).toByteArray();

    QMetaEnum acceptPolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("AcceptPolicy"));

    m_acceptCookies = acceptPolicyEnum.keyToValue(value) == -1 ?

                        AcceptOnlyFromSitesNavigatedTo :

                        static_cast<AcceptPolicy>(acceptPolicyEnum.keyToValue(value));

    value = settings.value(QLatin1String("keepCookiesUntil"), QLatin1String("KeepUntilExpire")).toByteArray();

    QMetaEnum keepPolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("KeepPolicy"));

    m_keepCookies = keepPolicyEnum.keyToValue(value) == -1 ?

                        KeepUntilExpire :

                        static_cast<KeepPolicy>(keepPolicyEnum.keyToValue(value));

    if (m_keepCookies == KeepUntilExit)

        setAllCookies(QList<QNetworkCookie>());

    m_loaded = true;

    emit cookiesChanged();

}

void CookieJar::save()

{

    if (!m_loaded)

        return;

    purgeOldCookies();

    QString directory = QDesktopServices::storageLocation(QDesktopServices::DataLocation);

    if (directory.isEmpty())

        directory = QDir::homePath() + QLatin1String("/.") + QCoreApplication::applicationName();

    if (!QFile::exists(directory)) {

        QDir dir;

        dir.mkpath(directory);

    }

    QSettings cookieSettings(directory + QLatin1String("/cookies.ini"), QSettings::IniFormat);

    QList<QNetworkCookie> cookies = allCookies();

    for (int i = cookies.count() - 1; i >= 0; --i) {

        if (cookies.at(i).isSessionCookie())

            cookies.removeAt(i);

    }

    cookieSettings.setValue(QLatin1String("cookies"), qVariantFromValue<QList<QNetworkCookie> >(cookies));

    cookieSettings.beginGroup(QLatin1String("Exceptions"));

    cookieSettings.setValue(QLatin1String("block"), m_exceptions_block);

    cookieSettings.setValue(QLatin1String("allow"), m_exceptions_allow);

    cookieSettings.setValue(QLatin1String("allowForSession"), m_exceptions_allowForSession);

    // save cookie settings

    QSettings settings;

    settings.beginGroup(QLatin1String("cookies"));

    QMetaEnum acceptPolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("AcceptPolicy"));

    settings.setValue(QLatin1String("acceptCookies"), QLatin1String(acceptPolicyEnum.valueToKey(m_acceptCookies)));

    QMetaEnum keepPolicyEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("KeepPolicy"));

    settings.setValue(QLatin1String("keepCookiesUntil"), QLatin1String(keepPolicyEnum.valueToKey(m_keepCookies)));

}

void CookieJar::purgeOldCookies()

{

    QList<QNetworkCookie> cookies = allCookies();

    if (cookies.isEmpty())

        return;

    int oldCount = cookies.count();

    QDateTime now = QDateTime::currentDateTime();

    for (int i = cookies.count() - 1; i >= 0; --i) {

        if (!cookies.at(i).isSessionCookie() && cookies.at(i).expirationDate() < now)

            cookies.removeAt(i);

    }

    if (oldCount == cookies.count())

        return;

    setAllCookies(cookies);

    emit cookiesChanged();

}

QList<QNetworkCookie> CookieJar::cookiesForUrl(const QUrl &url) const

{

    CookieJar *that = const_cast<CookieJar*>(this);

    if (!m_loaded)

        that->load();

    QWebSettings *globalSettings = QWebSettings::globalSettings();

    if (globalSettings->testAttribute(QWebSettings::PrivateBrowsingEnabled)) {

        QList<QNetworkCookie> noCookies;

        return noCookies;

    }

    return QNetworkCookieJar::cookiesForUrl(url);

}

bool CookieJar::setCookiesFromUrl(const QList<QNetworkCookie> &cookieList, const QUrl &url)

{

    if (!m_loaded)

        load();

    QWebSettings *globalSettings = QWebSettings::globalSettings();

    if (globalSettings->testAttribute(QWebSettings::PrivateBrowsingEnabled))

        return false;

    QString host = url.host();

    bool eBlock = qBinaryFind(m_exceptions_block.begin(), m_exceptions_block.end(), host) != m_exceptions_block.end();

    bool eAllow = qBinaryFind(m_exceptions_allow.begin(), m_exceptions_allow.end(), host) != m_exceptions_allow.end();

    bool eAllowSession = qBinaryFind(m_exceptions_allowForSession.begin(), m_exceptions_allowForSession.end(), host) != m_exceptions_allowForSession.end();

    bool addedCookies = false;

    // pass exceptions

    bool acceptInitially = (m_acceptCookies != AcceptNever);

    if ((acceptInitially && !eBlock)

        || (!acceptInitially && (eAllow || eAllowSession))) {

        // pass url domain == cookie domain

        QDateTime soon = QDateTime::currentDateTime();

        soon = soon.addDays(90);

        foreach(QNetworkCookie cookie, cookieList) {

            QList<QNetworkCookie> lst;

            if (m_keepCookies == KeepUntilTimeLimit

                && !cookie.isSessionCookie()

                && cookie.expirationDate() > soon) {

                    cookie.setExpirationDate(soon);

            }

            lst += cookie;

            if (QNetworkCookieJar::setCookiesFromUrl(lst, url)) {

                addedCookies = true;

            } else {

                // finally force it in if wanted

                if (m_acceptCookies == AcceptAlways) {

                    QList<QNetworkCookie> cookies = allCookies();

                    cookies += cookie;

                    setAllCookies(cookies);

                    addedCookies = true;

                }

#if 0

                else

                    qWarning() << "setCookiesFromUrl failed" << url << cookieList.value(0).toRawForm();

#endif

            }

        }

    }

    if (addedCookies) {

        m_saveTimer->changeOccurred();

        emit cookiesChanged();

    }

    return addedCookies;

}

CookieJar::AcceptPolicy CookieJar::acceptPolicy() const

{

    if (!m_loaded)

        (const_cast<CookieJar*>(this))->load();

    return m_acceptCookies;

}

void CookieJar::setAcceptPolicy(AcceptPolicy policy)

{

    if (!m_loaded)

        load();

    if (policy == m_acceptCookies)

        return;

    m_acceptCookies = policy;

    m_saveTimer->changeOccurred();

}

CookieJar::KeepPolicy CookieJar::keepPolicy() const

{

    if (!m_loaded)

        (const_cast<CookieJar*>(this))->load();

    return m_keepCookies;

}

void CookieJar::setKeepPolicy(KeepPolicy policy)

{

    if (!m_loaded)

        load();

    if (policy == m_keepCookies)

        return;

    m_keepCookies = policy;

    m_saveTimer->changeOccurred();

}

QStringList CookieJar::blockedCookies() const

{

    if (!m_loaded)

        (const_cast<CookieJar*>(this))->load();

    return m_exceptions_block;

}

QStringList CookieJar::allowedCookies() const

{

    if (!m_loaded)

        (const_cast<CookieJar*>(this))->load();

    return m_exceptions_allow;

}

QStringList CookieJar::allowForSessionCookies() const

{

    if (!m_loaded)

        (const_cast<CookieJar*>(this))->load();

    return m_exceptions_allowForSession;

}

void CookieJar::setBlockedCookies(const QStringList &list)

{

    if (!m_loaded)

        load();

    m_exceptions_block = list;

    qSort(m_exceptions_block.begin(), m_exceptions_block.end());

    m_saveTimer->changeOccurred();

}

void CookieJar::setAllowedCookies(const QStringList &list)

{

    if (!m_loaded)

        load();

    m_exceptions_allow = list;

    qSort(m_exceptions_allow.begin(), m_exceptions_allow.end());

    m_saveTimer->changeOccurred();

}

void CookieJar::setAllowForSessionCookies(const QStringList &list)

{

    if (!m_loaded)

        load();

    m_exceptions_allowForSession = list;

    qSort(m_exceptions_allowForSession.begin(), m_exceptions_allowForSession.end());

    m_saveTimer->changeOccurred();

}

CookieModel::CookieModel(CookieJar *cookieJar, QObject *parent)

    : QAbstractTableModel(parent)

    , m_cookieJar(cookieJar)

{

    connect(m_cookieJar, SIGNAL(cookiesChanged()), this, SLOT(cookiesChanged()));

    m_cookieJar->load();

}

QVariant CookieModel::headerData(int section, Qt::Orientation orientation, int role) const

{

    if (role == Qt::SizeHintRole) {

        QFont font;

        font.setPointSize(10);

        QFontMetrics fm(font);

        int height = fm.height() + fm.height()/3;

        int width = fm.width(headerData(section, orientation, Qt::DisplayRole).toString());

        return QSize(width, height);

    }

    if (orientation == Qt::Horizontal) {

        if (role != Qt::DisplayRole)

            return QVariant();

        switch (section) {

            case 0:

                return tr("Website");

            case 1:

                return tr("Name");

            case 2:

                return tr("Path");

            case 3:

                return tr("Secure");

            case 4:

                return tr("Expires");

            case 5:

                return tr("Contents");

            default:

                return QVariant();

        }

    }

    return QAbstractTableModel::headerData(section, orientation, role);

}

QVariant CookieModel::data(const QModelIndex &index, int role) const

{

    QList<QNetworkCookie> lst;

    if (m_cookieJar)

        lst = m_cookieJar->allCookies();

    if (index.row() < 0 || index.row() >= lst.size())

        return QVariant();

    switch (role) {

    case Qt::DisplayRole:

    case Qt::EditRole: {

        QNetworkCookie cookie = lst.at(index.row());

        switch (index.column()) {

            case 0:

                return cookie.domain();

            case 1:

                return cookie.name();

            case 2:

                return cookie.path();

            case 3:

                return cookie.isSecure();

            case 4:

                return cookie.expirationDate();

            case 5:

                return cookie.value();

        }

        }

    case Qt::FontRole:{

        QFont font;

        font.setPointSize(10);

        return font;

        }

    }

    return QVariant();

}

int CookieModel::columnCount(const QModelIndex &parent) const

{

    return (parent.isValid()) ? 0 : 6;

}

int CookieModel::rowCount(const QModelIndex &parent) const

{

    return (parent.isValid() || !m_cookieJar) ? 0 : m_cookieJar->allCookies().count();

}

bool CookieModel::removeRows(int row, int count, const QModelIndex &parent)

{

    if (parent.isValid() || !m_cookieJar)

        return false;

    int lastRow = row + count - 1;

    beginRemoveRows(parent, row, lastRow);

    QList<QNetworkCookie> lst = m_cookieJar->allCookies();

    for (int i = lastRow; i >= row; --i) {

        lst.removeAt(i);

    }

    m_cookieJar->setAllCookies(lst);

    endRemoveRows();

    return true;

}

void CookieModel::cookiesChanged()

{

    reset();

}

CookiesDialog::CookiesDialog(CookieJar *cookieJar, QWidget *parent) : QDialog(parent)

{

    setupUi(this);

    setWindowFlags(Qt::Sheet);

    CookieModel *model = new CookieModel(cookieJar, this);

    m_proxyModel = new QSortFilterProxyModel(this);

    connect(search, SIGNAL(textChanged(QString)),

            m_proxyModel, SLOT(setFilterFixedString(QString)));

    connect(removeButton, SIGNAL(clicked()), cookiesTable, SLOT(removeOne()));

    connect(removeAllButton, SIGNAL(clicked()), cookiesTable, SLOT(removeAll()));

    m_proxyModel->setSourceModel(model);

    cookiesTable->verticalHeader()->hide();

    cookiesTable->setSelectionBehavior(QAbstractItemView::SelectRows);

    cookiesTable->setModel(m_proxyModel);

    cookiesTable->setAlternatingRowColors(true);

    cookiesTable->setTextElideMode(Qt::ElideMiddle);

    cookiesTable->setShowGrid(false);

    cookiesTable->setSortingEnabled(true);

    QFont f = font();

    f.setPointSize(10);

    QFontMetrics fm(f);

    int height = fm.height() + fm.height()/3;

    cookiesTable->verticalHeader()->setDefaultSectionSize(height);

    cookiesTable->verticalHeader()->setMinimumSectionSize(-1);

    for (int i = 0; i < model->columnCount(); ++i){

        int header = cookiesTable->horizontalHeader()->sectionSizeHint(i);

        switch (i) {

        case 0:

            header = fm.width(QLatin1String("averagehost.domain.com"));

            break;

        case 1:

            header = fm.width(QLatin1String("_session_id"));

            break;

        case 4:

            header = fm.width(QDateTime::currentDateTime().toString(Qt::LocalDate));

            break;

        }

        int buffer = fm.width(QLatin1String("xx"));

        header += buffer;

        cookiesTable->horizontalHeader()->resizeSection(i, header);

    }

    cookiesTable->horizontalHeader()->setStretchLastSection(true);

}