2 files changed, 95 insertions, 2 deletions

diff --git a/depends/util/src/pathutils.cpp b/depends/util/src/pathutils.cpp
index 63f1b9a5..a193212c 100644
--- a/depends/util/src/pathutils.cpp
+++ b/depends/util/src/pathutils.cpp
@@ -22,6 +22,10 @@
 
 QString PathCombine(QString path1, QString path2)
 {
+	if(!path1.size())
+		return path2;
+	if(!path2.size())
+		return path1;
     return QDir::cleanPath(path1 + QDir::separator() + path2);
 }
 
diff --git a/gui/MainWindow.cpp b/gui/MainWindow.cpp
index eebb8a70..059f6d3b 100644
--- a/gui/MainWindow.cpp
+++ b/gui/MainWindow.cpp
@@ -1458,13 +1458,101 @@ void MainWindow::on_actionDeleteInstance_triggered()
 	}
 }
 
+#include <pathutils.h>
+
+bool compressSubDir(QuaZip* zip, QString dir, QString origDir, QString prefix)
+{
+	if (!zip) return false;
+	if (zip->getMode()!=QuaZip::mdCreate && zip->getMode()!=QuaZip::mdAppend && zip->getMode()!=QuaZip::mdAdd)
+	{
+		return false;
+	}
+
+	QDir directory(dir);
+	if (!directory.exists()) return false;
+
+	QDir origDirectory(origDir);
+	if (dir != origDir)
+	{
+		QuaZipFile dirZipFile(zip);
+		auto dirPrefix = PathCombine(prefix, origDirectory.relativeFilePath(dir)) + "/";
+		if (!dirZipFile.open(QIODevice::WriteOnly, QuaZipNewInfo(dirPrefix, dir), 0, 0, 0))
+		{
+			return false;
+		}
+		dirZipFile.close();
+	}
+
+	QFileInfoList files = directory.entryInfoList(QDir::AllDirs | QDir::NoDotAndDotDot | QDir::Hidden);
+	for (auto file: files)
+	{
+		if(!compressSubDir(zip,file.absoluteFilePath(),origDir, prefix))
+		{
+			return false;
+		}
+	}
+
+	files = directory.entryInfoList(QDir::Files);
+	for (auto file: files)
+	{
+		if(!file.isFile())
+		{
+			continue;
+		}
+
+		if(file.absoluteFilePath()==zip->getZipName())
+		{
+			continue;
+		}
+
+		QString filename = origDirectory.relativeFilePath(file.absoluteFilePath());
+		if(prefix.size())
+		{
+			filename = PathCombine(prefix, filename);
+		}
+		if (!JlCompress::compressFile(zip,file.absoluteFilePath(),filename))
+		{
+			return false;
+		}
+	}
+
+	return true;
+}
+
+bool compressDir(QString zipFile, QString dir, QString prefix = QString())
+{
+	QuaZip zip(zipFile);
+	QDir().mkpath(QFileInfo(zipFile).absolutePath());
+	if(!zip.open(QuaZip::mdCreate))
+	{
+		QFile::remove(zipFile);
+		return false;
+	}
+
+	QSet<QString> added;
+	if (!compressSubDir(&zip,dir,dir,prefix))
+	{
+		QFile::remove(zipFile);
+		return false;
+	}
+	zip.close();
+	if(zip.getZipError()!=0)
+	{
+		QFile::remove(zipFile);
+		return false;
+	}
+	return true;
+}
+
 void MainWindow::on_actionExportInstance_triggered()
 {
 	if (m_selectedInstance)
 	{
+		auto name = RemoveInvalidFilenameChars(m_selectedInstance->name());
+
 		const QString output = QFileDialog::getSaveFileName(this, tr("Export %1")
 															.arg(m_selectedInstance->name()),
-															QDir::homePath(), "Zip (*.zip)");
+															PathCombine(QDir::homePath(), name + ".zip") , "Zip (*.zip)");
 		if (output.isNull())
 		{
 			return;
@@ -1478,7 +1566,8 @@ void MainWindow::on_actionExportInstance_triggered()
 				return;
 			}
 		}
-		if (!JlCompress::compressDir(output, m_selectedInstance->instanceRoot()))
+
+		if (!compressDir(output, m_selectedInstance->instanceRoot(), name))
 		{
 			QMessageBox::warning(this, tr("Error"), tr("Unable to export instance"));
 		}