1 files changed, 110 insertions, 0 deletions
diff --git a/imageprovider.cpp b/imageprovider.cpp
new file mode 100644
index 0000000..6fb2807
--- /dev/null
+++ b/imageprovider.cpp
@@ -0,0 +1,110 @@
+#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;
+}