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

**

** 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 examples of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:BSD$

** You may use this file under the terms of the BSD license as follows:

**

** "Redistribution and use in source and binary forms, with or without

** modification, are permitted provided that the following conditions are

** met:

**   * Redistributions of source code must retain the above copyright

**     notice, this list of conditions and the following disclaimer.

**   * Redistributions in binary form must reproduce the above copyright

**     notice, this list of conditions and the following disclaimer in

**     the documentation and/or other materials provided with the

**     distribution.

**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor

**     the names of its contributors may be used to endorse or promote

**     products derived from this software without specific prior written

**     permission.

**

** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."

** $QT_END_LICENSE$

**

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

#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));

}

QWebElement GoogleChat::document() const {

    return form.webView->page()->mainFrame()->documentElement();

}

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";

    document().findFirst("#Email").setAttribute("value", userEmail);

    document().findFirst("#Passwd").setAttribute("value", password);

    document().findFirst("#gaia_loginform").evaluateJavaScript("this.submit();");

}

void GoogleChat::initialPage(bool ok) {

    if (!QSslSocket::supportsSsl()) {

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

        return;

    }

    if (ok) {

        QWebElement email = document().findFirst("#Email");

        QWebElement passwd = document().findFirst("#Passwd");

        QWebElement loginForm = document().findFirst("#gaia_loginform");

        if (!email.isNull() && !passwd.isNull() && !loginForm.isNull()) {

            form.stackedWidget->setCurrentIndex(1);

            form.userNameEdit->setFocus();

            form.webView->disconnect();

            return;

        }

    }

    showError("SERVICE unavailable.");

}

void GoogleChat::hideElements()

{

    document().findFirst(".footer-footer").removeFromDocument();

    document().findFirst(".title-bar-bg .title-bar").removeFromDocument();

    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

        QWebElement  e = document().findFirst(".errormsg");

        if (e.isNull()) {

            form.stackedWidget->setCurrentIndex(2);

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

            return;

        }

       QString err = "Unknown login failure.";

       const QString errorMessage = e.toPlainText();

        if (!errorMessage.isEmpty()) {

            err = errorMessage;

            err = err.simplified();

        }

        showError(err);

    }

}