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/*
 * This file is part of the syndication library
 *
 * Copyright (C) 2006 Frank Osterfeld <osterfeld@kde.org>
 *
 * 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.
 *
 */

#ifndef SYNDICATION_ENCLOSURE_H
#define SYNDICATION_ENCLOSURE_H

#include "syndication_export.h"

#include <QtCore/QSharedPointer>
#include <QtCore/QString>

namespace Syndication
{

class Enclosure;
//@cond PRIVATE
typedef QSharedPointer<Enclosure> EnclosurePtr;
//@endcond

/**
 * An enclosure describes a (media) file available on the net.
 *
 * Most of the time, enclosures are used for "podcasts", i.e. audio
 * files announced and distributed via syndication.
 *
 * @author Frank Osterfeld
 */
class SYNDICATION_EXPORT Enclosure
{
public:

    /**
     * destructor
     */
    virtual ~Enclosure();

    /**
     * returns whether this enclosure is a null object.
     */
    virtual bool isNull() const = 0;

    /**
     * The URL of the linked resource (required).
     */
    virtual QString url() const = 0;

    /**
     * title of the enclosure. This is a human-readable description of the
     * linked file. If available, the title should be used in user interfaces
     * instead of the URL. If no title is set (e.g., RSS2 enclosures don't
     * have titles), use url() as fallback.
     *
     * @return title describing the enclosure, or a null string if not
     * specified.
     */
    virtual QString title() const = 0;

    /**
     * mimetype of the enclosure.
     * TODO: link mimetype specs
     *
     * Examples are @c "audio/mpeg" for MP3, or @c "application/pdf" for
     * PDF.
     *
     * @return the mimetype of the file, or a null string if not
     * specified
     */
    virtual QString type() const = 0;

    /**
     * returns the length of the linked file in bytes
     *
     * @return the length of the file in bytes, 0 if not specified
     */
    virtual uint length() const = 0;

    /**
     * for audio/video files, the duration of the file in seconds
     *
     * @return the duration of the file in seconds, or 0 if not specified
     */
    virtual uint duration() const = 0;

    /**
     * description of this enclosure for debugging purposes
     *
     * @return debug string
     */
    virtual QString debugInfo() const;
};

} // namespace Syndication

#endif // SYNDICATION_ENCLOSURE_H