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#include <QtCore/QCryptographicHash>
#include <QtCore/QDir>
#include <QtCore/QEventLoop>
#include <QtCore/QUrl>
#include <QtCore/QDebug>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkReply>
#include "global.h"
#include "imageprovider.h"
// Warning: QML might call requestImage() from another thread. Be careful.
ImageProvider::ImageProvider() :
QDeclarativeImageProvider(Image),
_cachePath(board_manager->getCachePath() + "/images"),
_manager(new QNetworkAccessManager)
{
QDir dir;
if (!dir.mkpath(_cachePath)) {
qWarning() << "Could not create image cache path";
}
}
ImageProvider::~ImageProvider()
{
delete _manager;
}
QImage ImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize)
{
QString remoteUrl = QUrl::fromPercentEncoding(id.toUtf8());
QString localPath = getCachedImagePath(remoteUrl);
qDebug() << "Loading image for " << remoteUrl;
if (!QFile::exists(localPath)) {
if (!fetchImage(remoteUrl)) {
qWarning() << "Failed to fetch remote image" << remoteUrl;
}
} else {
qDebug() << "Local file exists" << localPath;
}
QImage image(localPath);
QImage result;
if (image.isNull()) {
qWarning() << "Failed to load local image" << localPath;
}
if (requestedSize.isValid()) {
result = image.scaled(requestedSize, Qt::KeepAspectRatio);
} else {
result = image;
}
if (size) {
*size = result.size();
}
return result;
}
QString ImageProvider::getProviderImageUrl(const QString &remoteUrl)
{
return "image://tapasboard/" + QString::fromUtf8(QUrl::toPercentEncoding(remoteUrl));
}
QString ImageProvider::getCachedImagePath(const QString &remoteUrl)
{
static const QRegExp regexp("[^a-z0-9]+");
QString url = remoteUrl.toLower();
// Grab the extension before applying the regexp
QString extension;
int dot_pos = url.lastIndexOf('.');
if (dot_pos != -1) {
extension = url.mid(dot_pos);
}
url.replace(regexp, "_");
return _cachePath + "/" + url + extension;
}
bool ImageProvider::fetchImage(const QString &remoteUrl)
{
QString localPath = getCachedImagePath(remoteUrl);
QNetworkRequest request(remoteUrl);
QNetworkReply *reply = _manager->get(request);
qDebug() << "Start download of" << remoteUrl;
QEventLoop loop;
loop.connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
loop.exec();
qDebug() << "End download of" << remoteUrl;
QFile localFile(localPath);
if (localFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
localFile.write(reply->readAll());
localFile.close();
}
reply->deleteLater();
return true;
}
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