/LH_WebKit/WebKit_Plugin/LH_RSSFeed.cpp

#include "LH_RSSFeed.h"



#include <QDebug>

#include <QPainter>

#include <QDesktopServices>

#include <QNetworkProxyQuery>

#include <QNetworkReply>



LH_RSSFeed::LH_RSSFeed(QString feedUrl, int refreshTime, int delayTime)

{

    lastrefresh_ = QDateTime::currentDateTime();

    lastopen_.start();

    lastmove_.start();



    nam_ = new QNetworkAccessManager(this);



    url_ = QUrl::fromUserInput(feedUrl);

    refresh_ = refreshTime;

    delay_ = delayTime;



    QObject::connect(nam_, SIGNAL(finished(QNetworkReply*)), this, SLOT(finished(QNetworkReply*)));



    if(feedUrl!="") fetch();



    notifyTimer_.start();

}



RSSItem LH_RSSFeed::item(int mod)

{

    if( nowshowing_ >= 0 && nowshowing_ < items_.size() )

    {

        int index = nowshowing_ + mod;

        while( index >= items_.size() ) index -= items_.size();

        while( index < 0 ) index += items_.size();



        return items_.at(index);

    }

    else

        return (RSSItem){"", "", "", "", "", (RSSThumbnail){"",0,0}};

}



void LH_RSSFeed::openItem(int mod)

{

    if( lastopen_.elapsed() > 200 )

    {

        if( nowshowing_ >= 0 && nowshowing_ < items_.size() )

        {

            int index = nowshowing_ + mod;

            if( index >= items_.size() ) index = 0;

            if( index < 0 ) index = items_.size()-1;



            lastopen_.restart();

            QDesktopServices::openUrl( QUrl::fromUserInput(items_.at(index).link) );

        }

    }

}



void LH_RSSFeed::moveNext()

{

    if(lastmove_.elapsed()<=200) return;

    switchwait_ = 0;

    if( nowshowing_ >= 0 && nowshowing_ < items_.size() )

    {

        ++ nowshowing_;

        if( nowshowing_ >= items_.size() ) nowshowing_ = 0;

        lastmove_.restart();

        emit changed();

    }

}

void LH_RSSFeed::moveBack()

{

    if(lastmove_.elapsed()<=200) return;

    switchwait_ = 0;

    if( nowshowing_ >= 0 && nowshowing_ < items_.size() )

    {

        -- nowshowing_;

        if( nowshowing_ < 0 ) nowshowing_ = items_.size()-1;

        lastmove_.restart();

        emit changed();

    }

}



int LH_RSSFeed::refresh()

{

    return refresh_;

}

void LH_RSSFeed::setRefresh(int r)

{

    if(refresh_ != r)

    {

        refresh_ = r;

        //requestPolling();

        emit refreshChanged();

    }

}



int LH_RSSFeed::delay()

{

    return delay_;

}

void LH_RSSFeed::setDelay(int d)

{

    if(delay_ != d)

    {

        delay_ = d;

        //requestPolling();

        emit delayChanged();

    }

}



QString LH_RSSFeed::url()

{

    return url_.toString();

}

void LH_RSSFeed::setUrl(QString u)

{

    if(url_.toString() != u)

    {

        url_.setUrl( u );

        emit urlChanged();

        fetch();

    }

}





void LH_RSSFeed::connect(QObject* intrfce)

{

    if (!connections_.contains(intrfce))

        connections_.append(intrfce);

}



int LH_RSSFeed::connections()

{

    return connections_.count();

}



bool LH_RSSFeed::release(QObject* intrfce)

{

    if (connections_.contains(intrfce))

    {

        connections_.removeAt(connections_.indexOf(intrfce));

        return true;

    }

    else

        return false;

}



int LH_RSSFeed::notify(int code,void* param)

{

    Q_UNUSED(param);



    if( code & LH_NOTE_SECOND  && notifyTimer_.elapsed() >= 1000)

    {

        notifyTimer_.restart();

        if( lastrefresh_.addSecs(60*refresh_) < QDateTime::currentDateTime() )

        {

            lastrefresh_ = QDateTime::currentDateTime();

            fetch();

        }



        if( ++switchwait_ >= delay_ )

        {

            switchwait_ = 0;

            if( nowshowing_ >= 0 && nowshowing_ < items_.size() )

            {

                ++ nowshowing_;

                if( nowshowing_ >= items_.size() ) nowshowing_ = 0;

                emit changed();

            }

        }

    }

    return LH_NOTE_SECOND;

}



void LH_RSSFeed::fetch()

{

    emit begin();

    lastrefresh_ = QDateTime::currentDateTime();

    nowshowing_ = -1;

    switchwait_ = 0;

    items_.clear();

    xml_.clear();



    QNetworkProxyQuery npq(url_);

    QList<QNetworkProxy> listOfProxies = QNetworkProxyFactory::systemProxyForQuery(npq);

    if(listOfProxies.count()!=0)

        if(listOfProxies.at(0).type() != QNetworkProxy::NoProxy)

            nam_->setProxy(listOfProxies.at(0));



    nam_->get( QNetworkRequest(url_) );

}



void LH_RSSFeed::finished( QNetworkReply* reply )

{

    if( reply )

    {

        if( reply->error() == QNetworkReply::NoError )

        {

            if( reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) == 200 )

            {

                xml_.addData(reply->readAll());

                parseXml();

            }

            else if( reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) == 301 )

            {

                QString dest = reply->header(QNetworkRequest::LocationHeader).toString();

                qDebug() << "LH_RSSFeed: Changing URL, content permanently moved to" << dest;

                url_ = QUrl::fromUserInput( dest );

                emit urlChanged();

                fetch();

            }

            else

            {

                qWarning() << "LH_RSSFeed: HTTP code" << reply->attribute(QNetworkRequest::HttpStatusCodeAttribute) << reply->errorString() << reply->url().toString();

            }

        }

        else

        {



        }

        reply->deleteLater();

    }

    if( items_.size() > 0 )

    {

        nowshowing_ = 0;

        switchwait_ = 0;

        emit changed();

        emit finished();

    }

}



void LH_RSSFeed::parseXml()

{

    QString currentTag;

    RSSItem item;

    while (!xml_.atEnd())

    {

        xml_.readNext();

        if (xml_.isStartElement())

        {

            if( xml_.name() == "item" ) item.link = xml_.attributes().value("rss:about").toString();

            if( xml_.name() == "thumbnail" )

            {

                item.thumbnail.url = xml_.text().toString();

                if(xml_.attributes().hasAttribute("url"))

                    item.thumbnail.url = xml_.attributes().value("url").toString();

                if(xml_.attributes().hasAttribute("width"))

                    item.thumbnail.width = xml_.attributes().value("width").toString().toInt();

                if(xml_.attributes().hasAttribute("height"))

                    item.thumbnail.height = xml_.attributes().value("height").toString().toInt();

            }

            currentTag = xml_.name().toString();

        }

        else if (xml_.isEndElement())

        {

            if (xml_.name() == "item")

            {

                items_ << item;

                item = (RSSItem){"", "", "", "", "", (RSSThumbnail){"",0,0}};

            }

        }

        else if (xml_.isCharacters() && !xml_.isWhitespace())

        {

            if( currentTag == "title" ) item.title = xml_.text().toString();

            else if( currentTag == "link" ) item.link = xml_.text().toString();

            else if( currentTag == "description" ) item.description = xml_.text().toString();

            else if( currentTag == "author" ) item.author = xml_.text().toString();

            else if( currentTag == "pubDate" ) item.pubDate = xml_.text().toString();

        }

    }

    if (xml_.error() && xml_.error() != QXmlStreamReader::PrematureEndOfDocumentError)

    {

        qWarning() << "XML ERROR:" << xml_.lineNumber() << ": " << xml_.errorString();

    }

}







QHash<QString, LH_RSSFeed* >* rssFeeds = NULL;