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#include "qm3uhandler.h"

#include <qmediaresource.h>

#include <QtCore/qiodevice.h>

#include <QtCore/qfileinfo.h>

#include <QtCore/qtextstream.h>

#include <QFile>

#include <QUrl>

class QM3uPlaylistReader : public QMediaPlaylistReader

{

public:

    QM3uPlaylistReader(QIODevice *device)

        :m_ownDevice(false), m_device(device), m_textStream(new QTextStream(m_device))

    {

        readItem();

    }

    QM3uPlaylistReader(const QUrl& location)

        :m_ownDevice(true)

    {

        QFile *f = new QFile(location.toLocalFile());

        if (f->open(QIODevice::ReadOnly | QIODevice::Text)) {

            m_device = f;

            m_textStream = new QTextStream(m_device);

            readItem();

        } else {

            delete f;

            m_device = 0;

            m_textStream = 0;

        }

    }

    virtual ~QM3uPlaylistReader()

    {

        if (m_ownDevice) {

            delete m_device;

        }

        delete m_textStream;

    }

    virtual bool atEnd() const

    {

        //we can't just use m_textStream->atEnd(),

        //for files with empty lines/comments at end

        return nextResource.isNull();

    }

    virtual QMediaContent readItem()

    {

        QMediaContent item;

        if (!nextResource.isNull())

        item = QMediaContent(nextResource);

        nextResource = QMediaContent();

        while (m_textStream && !m_textStream->atEnd()) {

            QString line = m_textStream->readLine();

            if (line.isEmpty() || line[0] == '#')

                continue;

            nextResource = QMediaContent(QUrl(line));

            break;

        }

        return item;

    }

    virtual void close()

    {

    }

private:

    bool m_ownDevice;

    QIODevice *m_device;

    QTextStream *m_textStream;

    QMediaContent nextResource;

};

class QM3uPlaylistWriter : public QMediaPlaylistWriter

{

public:

    QM3uPlaylistWriter(QIODevice *device)

        :m_device(device), m_textStream(new QTextStream(m_device))

    {

    }

    virtual ~QM3uPlaylistWriter()

    {

        delete m_textStream;

    }

    virtual bool writeItem(const QMediaContent& item)

    {

        *m_textStream << item.canonicalUrl().toString() << endl;

        return true;

    }

    virtual void close()

    {

    }

private:

    QIODevice *m_device;

    QTextStream *m_textStream;

};

QM3uPlaylistPlugin::QM3uPlaylistPlugin(QObject *parent)

    :QMediaPlaylistIOPlugin(parent)

{

}

QM3uPlaylistPlugin::~QM3uPlaylistPlugin()

{

}

bool QM3uPlaylistPlugin::canRead(QIODevice *device, const QByteArray &format) const

{

    return device->isReadable() && (format == "m3u" || format.isEmpty());

}

bool QM3uPlaylistPlugin::canRead(const QUrl& location, const QByteArray &format) const

{

    if (!QFileInfo(location.toLocalFile()).isReadable())

        return false;

    if (format == "m3u")

        return true;

    if (!format.isEmpty())

        return false;

    else

        return location.toLocalFile().toLower().endsWith(QLatin1String("m3u"));

}

bool QM3uPlaylistPlugin::canWrite(QIODevice *device, const QByteArray &format) const

{

    return device->isOpen() && device->isWritable() && format == "m3u";

}

QStringList QM3uPlaylistPlugin::keys() const

{

    return QStringList() << QLatin1String("m3u");

}

QMediaPlaylistReader *QM3uPlaylistPlugin::createReader(QIODevice *device, const QByteArray &format)

{

    Q_UNUSED(format);

    return new QM3uPlaylistReader(device);

}

QMediaPlaylistReader *QM3uPlaylistPlugin::createReader(const QUrl& location, const QByteArray &format)

{

    Q_UNUSED(format);

    return new QM3uPlaylistReader(location);

}

QMediaPlaylistWriter *QM3uPlaylistPlugin::createWriter(QIODevice *device, const QByteArray &format)

{

    Q_UNUSED(format);

    return new QM3uPlaylistWriter(device);

}