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rss.h
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rss.h
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/*
* Bittorrent Client using Qt4 and libtorrent.
* Copyright (C) 2006 Christophe Dumez, Arnaud Demaiziere
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Contact : [email protected], [email protected]
*/
#ifndef RSS_H
#define RSS_H
// MAX ITEM A STREAM
#define STREAM_MAX_ITEM 18
// FIXME: not used yet
#define GLOBAL_MAX_ITEM 150
// avoid crash if too many refresh
#define REFRESH_FREQ_MAX 5000
#include <QFile>
#include <QList>
#include <curl/curl.h>
#include <QTemporaryFile>
#include <QSettings>
#include <QDomDocument>
#include <QTime>
#include "misc.h"
#include "downloadThread.h"
class RssManager;
class RssStream;
class RssItem;
// Item of a rss stream, single information
class RssItem{
private:
QString title;
QString link;
QString description;
QString image;
bool read;
QString downloadLink;
public:
// public constructor
RssItem(const QDomElement& properties){
read = false;
downloadLink = "none";
QDomElement property = properties.firstChild().toElement();
while(!property.isNull()) {
if (property.tagName() == "title")
title = property.text();
else if (property.tagName() == "link")
link = property.text();
else if (property.tagName() == "description")
description = property.text();
else if (property.tagName() == "image")
image = property.text();
property = property.nextSibling().toElement();
}
}
~RssItem(){
}
QString getTitle() const{
return title;
}
QString getLink() const{
return link;
}
QString getDescription() const{
return description;
}
QString getImage() const{
return image;
}
QString getDownloadLink() const{
return downloadLink;
}
bool isRead() const{
return read;
}
void setRead(){
read = true;
}
};
// Rss stream, loaded form an xml file
class RssStream : public QObject{
Q_OBJECT
private:
QString title;
QString alias;
QString link;
QString description;
QString image;
QString url;
QString filePath;
QList<RssItem*> listItem;
downloadThread* downloader;
QTime lastRefresh;
signals:
void refreshFinished(const QString& msg);
public slots :
// read and store the downloaded rss' informations
void processDownloadedFile(const QString&, const QString& file_path, int return_code, const QString&) {
// delete the former file
if(QFile::exists(filePath)) {
QFile::remove(filePath);
}
filePath = file_path;
if(return_code){
// Download failed
qDebug("(download failure) "+file_path.toUtf8());
if(QFile::exists(filePath)) {
QFile::remove(file_path);
}
return;
}
openRss();
emit refreshFinished(url);
}
public:
RssStream(const QString& _url) {
url = _url;
alias = url;
downloader = new downloadThread(this);
connect(downloader, SIGNAL(downloadFinished(const QString&, const QString&, int, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&, int, const QString&)));
downloader->downloadUrl(url);
lastRefresh.start();
}
~RssStream(){
removeAllItem();
delete downloader;
if(QFile::exists(filePath))
QFile::remove(filePath);
}
// delete all the items saved
void removeAllItem() {
unsigned int listSize = listItem.size();
for(unsigned int i=0; i<listSize; ++i){
delete getItem(i);
}
}
void refresh() {
connect(downloader, SIGNAL(downloadFinished(const QString&, const QString&, int, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&, int, const QString&)));
downloader->downloadUrl(url);
lastRefresh.start();
}
QString getTitle() const{
return title;
}
QString getAlias() const{
return alias;
}
//prefer the RssManager::setAlias, do not save the changed ones
void setAlias(const QString& _alias){
alias = _alias;
}
QString getLink() const{
return link;
}
QString getUrl() const{
return url;
}
QString getDescription() const{
return description;
}
QString getImage() const{
return image;
}
QString getFilePath() const{
return filePath;
}
RssItem* getItem(unsigned int index) const{
return listItem.at(index);
}
unsigned int getListSize() const{
return listItem.size();
}
QList<RssItem*> getListItem() const{
return listItem;
}
int getLastRefreshElapsed() const{
return lastRefresh.elapsed();
}
private:
// read and create items from a rss document
short read(const QDomDocument& doc) {
// is it a rss file ?
QDomElement root = doc.documentElement();
if(root.tagName() == "html"){
qDebug("the file is empty, maybe the url is wrong or the server is too busy");
return -1;
}
else if(root.tagName() != "rss"){
qDebug("the file is not a rss stream, <rss> omitted"+root.tagName().toUtf8());
return -1;
}
QDomNode rss = root.firstChild();
QDomElement channel = root.firstChild().toElement();
unsigned short listsize = getListSize();
for(unsigned short i=0; i<listsize; i++) {
listItem.removeLast();
}
while(!channel.isNull()) {
// we are reading the rss'main info
if (channel.tagName() == "channel") {
QDomElement property = channel.firstChild().toElement();
while(!property.isNull()) {
if (property.tagName() == "title") {
title = property.text();
if(alias==getUrl())
setAlias(title);
}
else if (property.tagName() == "link")
link = property.text();
else if (property.tagName() == "description")
description = property.text();
else if (property.tagName() == "image")
image = property.text();
else if(property.tagName() == "item") {
if(getListSize() < STREAM_MAX_ITEM) {
listItem.append(new RssItem(property));
}
}
property = property.nextSibling().toElement();
}
}
channel = channel.nextSibling().toElement();
}
return 0;
}
// not actually used, it is used to resize the list of item AFTER the update, instead of delete it BEFORE, some troubles
void resizeList() {
unsigned short lastindex = 0;
QString firstTitle = getItem(0)->getTitle();
unsigned short listsize = getListSize();
for(unsigned short i=0; i<listsize; i++) {
if(getItem(i)->getTitle() == firstTitle)
lastindex = i;
}
for(unsigned short i=0; i<lastindex; i++) {
listItem.removeFirst();
}
while(getListSize()>STREAM_MAX_ITEM) {
listItem.removeAt(STREAM_MAX_ITEM);
}
}
// existing and opening test after download
short openRss(){
QDomDocument doc("Rss Seed");
QFile fileRss(filePath);
if(!fileRss.open(QIODevice::ReadOnly | QIODevice::Text)) {
qDebug("error : open failed, no file or locked, "+filePath.toUtf8());
if(QFile::exists(filePath)) {
fileRss.remove();
}
return -1;
}
if(!doc.setContent(&fileRss)) {
qDebug("can't read temp file, might be empty");
fileRss.close();
if(QFile::exists(filePath)) {
fileRss.remove();
}
return -1;
}
// start reading the xml
short return_lecture = read(doc);
fileRss.close();
if(QFile::exists(filePath)) {
fileRss.remove();
}
return return_lecture;
}
};
// global class, manage the whole rss stream
class RssManager : public QObject{
Q_OBJECT
private :
QList<RssStream*> streamList;
QStringList streamListUrl;
QStringList streamListAlias;
signals:
void streamNeedRefresh(const int&);
public slots :
void streamNeedRefresh(const QString& _url) {
emit(streamNeedRefresh(hasStream(_url)));
}
public :
RssManager(){
loadStreamList();
}
~RssManager(){
saveStreamList();
unsigned int streamListSize = streamList.size();
for(unsigned int i=0; i<streamListSize; ++i){
delete getStream(i);
}
}
// load the list of the rss stream
void loadStreamList(){
QSettings settings("qBittorrent", "qBittorrent");
settings.beginGroup("Rss");
streamListUrl = settings.value("streamList").toStringList();
streamListAlias = settings.value("streamAlias").toStringList();
//XXX: Maybe check that both list have same size?
qDebug("NB RSS streams loaded: %d", streamListUrl.size());
settings.endGroup();
unsigned int streamListUrlSize = streamListUrl.size();
for(unsigned int i=0; i<streamListUrlSize; ++i){
RssStream *stream = new RssStream(streamListUrl.at(i));
stream->setAlias(streamListAlias.at(i));
streamList.append(stream);
connect(stream, SIGNAL(refreshFinished(const QString&)), this, SLOT(streamNeedRefresh(const QString&)));
}
}
// save the list of the rss stream for the next session
void saveStreamList(){
QSettings settings("qBittorrent", "qBittorrent");
settings.beginGroup("Rss");
settings.setValue("streamList", streamListUrl);
settings.setValue("streamAlias", streamListAlias);
settings.endGroup();
}
// add a stream to the manager
void addStream(RssStream* stream){
if(hasStream(stream) < 0){
streamList.append(stream);
streamListUrl.append(stream->getUrl());
streamListAlias.append(stream->getUrl());
connect(stream, SIGNAL(refreshFinished(const QString&)), this, SLOT(streamNeedRefresh(const QString&)));
}else{
qDebug("Not adding the Rss stream because it is already in the list");
}
}
// add a stream to the manager
void addStream(QString url){
// completion of the address
if(!url.endsWith(".xml")) {
if(url.endsWith("/")) {
url.append("rss.xml");
} else {
url.append("/rss.xml");
}
}
if(hasStream(url) < 0) {
RssStream* stream = new RssStream(url);
streamList.append(stream);
streamListUrl.append(url);
streamListAlias.append(url);
connect(stream, SIGNAL(refreshFinished(const QString&)), this, SLOT(streamNeedRefresh(const QString&)));
}else {
qDebug("Not adding the Rss stream because it is already in the list");
}
}
// remove a stream from the manager
void removeStream(RssStream* stream){
short index = hasStream(stream);
if(index != -1){
delete streamList.takeAt(index);
streamListUrl.removeAt(index);
streamListAlias.removeAt(index);
}
}
// remove all the streams in the manager
void removeAll(){
QList<RssStream*> newStreamList;
QStringList newUrlList, newAliasList;
unsigned int streamListSize = streamList.size();
for(unsigned int i=0; i<streamListSize; ++i){
delete getStream(i);
}
streamList = newStreamList;
streamListUrl = newUrlList;
streamListAlias = newAliasList;
}
// reload all the xml files from the web
void refreshAll(){
unsigned int streamListUrlSize = streamListUrl.size();
for(unsigned int i=0; i<streamListUrlSize; ++i){
getStream(i)->refresh();
connect(getStream(i), SIGNAL(refreshFinished(const QString&)), this, SLOT(streamNeedRefresh(const QString&)));
}
}
void refresh(int index) {
if(index>=0 && index<getNbStream()) {
if(getStream(index)->getLastRefreshElapsed()>REFRESH_FREQ_MAX) {
getStream(index)->refresh();
connect(getStream(index), SIGNAL(refreshFinished(const QString&)), this, SLOT(streamNeedRefresh(const QString&)));
}
}
}
// return the position index of a stream, if the manager owns it
int hasStream(RssStream* stream) const{
return hasStream(stream->getUrl());
}
int hasStream(const QString& url) const{
return streamListUrl.indexOf(url);
}
RssStream* getStream(const int& index) const{
return streamList.at(index);
}
int getNbStream() {
return streamList.size();
}
//set an alias to an stream and save it for later
void setAlias(int index, QString newAlias) {
if(newAlias.length()>=2 && !streamListAlias.contains(newAlias, Qt::CaseInsensitive)) {
getStream(index)->setAlias(newAlias);
streamListAlias.replace(index, newAlias);
}
}
};
#endif