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

**

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

** All rights reserved.

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

**

** This file is part of the examples of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** 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 <QtGui>

#include <QtWebKit>

#include <QSslSocket>

#include "googlechat.h"

#define GOOGLECHAT_URL "http://talkgadget.google.com/talkgadget/m"

GoogleChat::GoogleChat(): QWidget() {

    form.setupUi(this);

    setFixedSize(320, 480);

    form.userNameEdit->setFocus();

    connect(form.userNameEdit, SIGNAL(textChanged(QString)), SLOT(adjustLoginButton()));

    connect(form.userNameEdit, SIGNAL(returnPressed()), SLOT(inputPassword()));

    connect(form.passwordEdit, SIGNAL(textChanged(QString)), SLOT(adjustLoginButton()));

    connect(form.passwordEdit, SIGNAL(returnPressed()), SLOT(doLogin()));

    form.loginButton->setEnabled(false);

    connect(form.loginButton, SIGNAL(clicked()), SLOT(doLogin()));

    connect(form.webView, SIGNAL(loadFinished(bool)), SLOT(initialPage(bool)));

    connect(form.webView, SIGNAL(loadProgress(int)),

            form.progressBar, SLOT(setValue(int)));

    form.webView->setUrl((QUrl(GOOGLECHAT_URL)));

    form.webView->setContextMenuPolicy(Qt::PreventContextMenu);

    showStatus("Wait...");

}

void GoogleChat::showStatus(const QString &msg) {

    form.statusLabel->setText(msg);

    form.stackedWidget->setCurrentIndex(0);

}

void GoogleChat::showError(const QString &msg) {

    form.progressBar->hide();

    showStatus(QString("Error: %1").arg(msg));

}

QString GoogleChat::evalJS(const QString &js) {

    QWebFrame *frame = form.webView->page()->mainFrame();

    return frame->evaluateJavaScript(js).toString();

}

void GoogleChat::adjustLoginButton() {

    userName = form.userNameEdit->text();

    password = form.passwordEdit->text();

    bool ok = !userName.isEmpty() && !password.isEmpty();

    form.loginButton->setEnabled(ok);

}

void GoogleChat::inputPassword() {

    if (!form.userNameEdit->text().isEmpty())

        form.passwordEdit->setFocus();

}

void GoogleChat::doLogin() {

    userName = form.userNameEdit->text();

    password = form.passwordEdit->text();

    bool ok = !userName.isEmpty() && !password.isEmpty();

    if (!ok)

        return;

    form.progressBar->setValue(0);

    form.progressBar->show();

    connect(form.webView, SIGNAL(loadFinished(bool)), SLOT(loginPage(bool)));

    connect(form.webView, SIGNAL(loadProgress(int)),

            form.progressBar, SLOT(setValue(int)));

    showStatus("Logging in...");

    QString userEmail = userName + "@gmail.com";

    evalJS(QString("document.getElementById('Email').value = \"%1\";").arg(userEmail));

    evalJS(QString("document.getElementById('Passwd').value = \"%1\";").arg(password));

    evalJS("document.getElementById('gaia_loginform').submit();");

}

void GoogleChat::initialPage(bool ok) {

    if (!QSslSocket::supportsSsl()) {

        showError("This example requires SSL support.");

        return;

    }

    if (ok) {

        QString s1 = evalJS("document.getElementById('Email').name");

        QString s2 = evalJS("document.getElementById('Passwd').name");

        QString s3 = evalJS("document.getElementById('gaia_loginform').id");

        if (s1 == "Email" && s2 == "Passwd" && s3 == "gaia_loginform") {

            form.stackedWidget->setCurrentIndex(1);

            form.webView->disconnect();

            return;

        }

    }

    showError("SERVICE unavailable.");

}

void GoogleChat::hideElements()

{

    evalJS("var e = document.getElementsByClassName('footer-footer')[0]; e.parentElement.removeChild(e)");

    evalJS("var e = document.getElementsByClassName('title-bar-bg title-bar')[0]; e.parentElement.removeChild(e)");

    QTimer::singleShot(2000, this, SLOT(hideElements()));

}

void GoogleChat::loginPage(bool ok) {

    QString location = form.webView->url().toString();

    if (!ok) {

        if (location.indexOf("CheckCookie"))

            return;

        showError("Service unavailable");

    } else {

        // check for any error message

        QString c = evalJS("document.getElementsByClassName('errormsg').length");

        if (c == "0") {

            form.stackedWidget->setCurrentIndex(2);

            QTimer::singleShot(500, this, SLOT(hideElements()));

            return;

        }

        QString err = "Unknown login failure.";

        if (c == "1") {

            err = evalJS("document.getElementsByClassName('errormsg')[0].textContent");

            err = err.simplified();

        }

        showError(err);

    }

}