/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
 * Copyright (C) 2009 Apple Inc. All rights reserved.
 *
 * 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 Google Inc. 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.
 */

#ifndef Notification_h  
#define Notification_h

#include "ActiveDOMObject.h"
#include "EventNames.h"
#include "EventTarget.h"
#include "ExceptionCode.h"
#include "KURL.h"
#include "NotificationContents.h"
#include "SharedBuffer.h"
#include "TextDirection.h"
#include "ThreadableLoaderClient.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/RefPtr.h>
#include <wtf/text/AtomicStringHash.h>

#if ENABLE(NOTIFICATIONS)
namespace WebCore {

    class NotificationCenter;
    class ResourceError;
    class ResourceResponse;
    class ScriptExecutionContext;
    class ThreadableLoader;

    class Notification : public RefCounted<Notification>, public ActiveDOMObject, public ThreadableLoaderClient, public EventTarget {
        WTF_MAKE_FAST_ALLOCATED;
    public:
        static PassRefPtr<Notification> create(const KURL& url, ScriptExecutionContext* context, ExceptionCode& ec, PassRefPtr<NotificationCenter> provider);
        static PassRefPtr<Notification> create(const NotificationContents& contents, ScriptExecutionContext* context, ExceptionCode& ec, PassRefPtr<NotificationCenter> provider);
        
        virtual ~Notification();

        void show();
        void cancel();
    
        bool isHTML() { return m_isHTML; }
        KURL url() { return m_notificationURL; }
        KURL iconURL() { return m_contents.icon(); }
        NotificationContents& contents() { return m_contents; }

        String dir() const { return m_direction; }
        void setDir(const String& dir) { m_direction = dir; }
        String replaceId() const { return m_replaceId; }
        void setReplaceId(const String& replaceId) { m_replaceId = replaceId; }

        TextDirection direction() const { return dir() == "rtl" ? RTL : LTR; }

        DEFINE_ATTRIBUTE_EVENT_LISTENER(display);
        DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
        DEFINE_ATTRIBUTE_EVENT_LISTENER(close);
        DEFINE_ATTRIBUTE_EVENT_LISTENER(click);

        using RefCounted<Notification>::ref;
        using RefCounted<Notification>::deref;

        // EventTarget interface
        virtual const AtomicString& interfaceName() const;
        virtual ScriptExecutionContext* scriptExecutionContext() const { return ActiveDOMObject::scriptExecutionContext(); }

        // ActiveDOMObject interface
        virtual void contextDestroyed();

        void stopLoading();

        SharedBuffer* iconData() { return m_iconData.get(); }
        void releaseIconData() { m_iconData = 0; }

        // Deprecated. Use functions from NotificationCenter.
        void detachPresenter() { }

        virtual void didReceiveResponse(unsigned long, const ResourceResponse&);
        virtual void didReceiveData(const char* data, int dataLength);
        virtual void didFinishLoading(unsigned long identifier, double finishTime);
        virtual void didFail(const ResourceError&);
        virtual void didFailRedirectCheck();

    private:
        Notification(const KURL&, ScriptExecutionContext*, ExceptionCode&, PassRefPtr<NotificationCenter>);
        Notification(const NotificationContents&, ScriptExecutionContext*, ExceptionCode&, PassRefPtr<NotificationCenter>);

        // EventTarget interface
        virtual void refEventTarget() { ref(); }
        virtual void derefEventTarget() { deref(); }
        virtual EventTargetData* eventTargetData();
        virtual EventTargetData* ensureEventTargetData();

        void startLoading();
        void finishLoading();

        bool m_isHTML;
        KURL m_notificationURL;
        NotificationContents m_contents;

        String m_direction;
        String m_replaceId;

        enum NotificationState {
            Idle = 0,
            Loading = 1,
            Showing = 2,
            Cancelled = 3
        };

        NotificationState m_state;

        RefPtr<NotificationCenter> m_notificationCenter;
        
        EventTargetData m_eventTargetData;

        RefPtr<ThreadableLoader> m_loader;
        RefPtr<SharedBuffer> m_iconData;
    };

} // namespace WebCore

#endif // ENABLE(NOTIFICATIONS)

#endif // Notifications_h
