/*
  Copyright (C) 2007 Trolltech ASA
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Library General Public License for more details.
  
  You should have received a copy of the GNU Library General Public License
  along with this library; see the file COPYING.LIB.  If not, write to
  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.
  
  This class provides all functionality needed for loading images, style sheets and html
  pages from the web. It has a memory cache for these objects.
*/
#ifndef QWEBNETWORKINTERFACE_H
#define QWEBNETWORKINTERFACE_H

#include <QtCore/qobject.h>
#include <QtCore/qurl.h>
#include <QtNetwork/qhttp.h>
#include <QtCore/qbytearray.h>

#include "qwebkitglobal.h"

class QAuthenticator;
class QNetworkProxy;
class QSslError;
class QWebFrame;
class QWebNetworkJobPrivate;
class QWebNetworkInterface;
class QWebObjectPluginConnector;

namespace WebCore {
    class WebCoreHttp;
    class ResourceRequest;
    class FrameLoaderClientQt;
}

struct QWebNetworkRequestPrivate;
class QWEBKIT_EXPORT QWebNetworkRequest
{
public:
    enum Method {
        Get,
        Post
        //Head
    };

    QWebNetworkRequest();
    explicit QWebNetworkRequest(const QUrl &url, Method method = Get, const QByteArray &postData = QByteArray());
    QWebNetworkRequest(const QWebNetworkRequest &other);

    QWebNetworkRequest &operator=(const QWebNetworkRequest &other);
    ~QWebNetworkRequest();

    QUrl url() const;
    void setUrl(const QUrl &url);

    QHttpRequestHeader httpHeader() const;
    void setHttpHeader(const QHttpRequestHeader &header) const;

    QString httpHeaderField(const QString &key) const;
    void setHttpHeaderField(const QString &key, const QString &value);

    QByteArray postData() const;
    void setPostData(const QByteArray &data);

private:
    explicit QWebNetworkRequest(const QWebNetworkRequestPrivate &priv);
    explicit QWebNetworkRequest(const WebCore::ResourceRequest &request);
    friend class QWebNetworkJob;
    friend class WebCore::FrameLoaderClientQt;

    QWebNetworkRequestPrivate *d;
    friend class QWebObjectPluginConnector;
};

class QWEBKIT_EXPORT QWebNetworkJob
{
public:

    QUrl url() const;
    QByteArray postData() const;
    QHttpRequestHeader httpHeader() const;
    QWebNetworkRequest request() const;
    QString errorString() const;

    QHttpResponseHeader response() const;
    void setResponse(const QHttpResponseHeader &response);
    void setErrorString(const QString&);

    bool cancelled() const;

    void ref();
    bool deref();

    QWebNetworkInterface *networkInterface() const;
    
    QWebFrame *frame() const;

protected:
    enum JobStatus {
        JobCreated,
        JobRecreated,
        JobStarted,
        JobReceivingData,
        JobFinished
    };

    JobStatus status() const;
    void setStatus(const JobStatus&);

private:
    QWebNetworkJob();
    ~QWebNetworkJob();

    friend class QWebNetworkManager;
    friend class QWebObjectPluginConnector;
    friend class QWebNetworkJobPrivate;

    QWebNetworkJobPrivate *d;
};

class QWebNetworkInterfacePrivate;

class QWEBKIT_EXPORT QWebNetworkInterface : public QObject
{
    Q_OBJECT
public:
    QWebNetworkInterface(QObject *parent = 0);
    ~QWebNetworkInterface();

    static void setDefaultInterface(QWebNetworkInterface *defaultInterface);
    static QWebNetworkInterface *defaultInterface();

    virtual void addJob(QWebNetworkJob *job);
    virtual void cancelJob(QWebNetworkJob *job);

protected:
    void started(QWebNetworkJob*);
    void data(QWebNetworkJob*, const QByteArray &data);
    void finished(QWebNetworkJob*, int errorCode);
    
signals:
    /**
     * Signal is emitted when an SSL error occurs.
     */
    void sslErrors(QWebFrame *frame, const QUrl& url, const QList<QSslError>& errors, bool *continueAnyway);
    /**
     * Signal is emitted when network authentication is required.
     */
    void authenticate(QWebFrame *frame, const QUrl& url, const QString& hostname, quint16 port, QAuthenticator *auth);
    /**
     * Signal is emitted when proxy authentication is required.
     */
    void authenticateProxy(QWebFrame *frame, const QUrl& url, const QNetworkProxy& proxy, QAuthenticator *auth);

private:
    friend class QWebNetworkInterfacePrivate;
    friend class WebCore::WebCoreHttp;
    QWebNetworkInterfacePrivate *d;
};

#endif