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/**
* <a href="http://www.openolat.org">
* OpenOLAT - Online Learning and Training</a><br>
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at the
* <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a>
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Initial code contributed and copyrighted by<br>
* frentix GmbH, http://www.frentix.com
* <p>
*/
package org.olat.course.archiver;
import org.apache.logging.log4j.Logger;
import org.olat.core.gui.UserRequest;
import org.olat.core.logging.Tracing;
import org.olat.core.util.StringHelper;
import org.olat.core.util.prefs.Preferences;
import org.olat.core.util.xml.XStreamHelper;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.security.ExplicitTypePermission;
/**
* this class reads and writes XML serialized config data to personal gui prefs and retrieves them
*
* Initial Date: 21.04.2017
* @author fkiefer, [email protected], www.frentix.com
*/
public class FormatConfigHelper {
private static final String QTI_EXPORT_ITEM_FORMAT_CONFIG = "QTIExportItemFormatConfig";
private static final Logger log = Tracing.createLoggerFor(FormatConfigHelper.class);
private static final XStream configXstream = XStreamHelper.createXStreamInstance();
static {
Class<?>[] types = new Class[] { ExportFormat.class };
// BUG: CWE-91 XML Injection (aka Blind XPath Injection)
// XStream.setupDefaultSecurity(configXstream);
// FIXED:
configXstream.addPermission(new ExplicitTypePermission(types));
configXstream.alias(QTI_EXPORT_ITEM_FORMAT_CONFIG, ExportFormat.class);
}
public static ExportFormat loadExportFormat(UserRequest ureq) {
ExportFormat formatConfig = null;
if (ureq != null) {
try {
Preferences guiPrefs = ureq.getUserSession().getGuiPreferences();
String formatConfigString = (String) guiPrefs.get(ExportOptionsController.class, QTI_EXPORT_ITEM_FORMAT_CONFIG);
if(StringHelper.containsNonWhitespace(formatConfigString)) {
formatConfig = (ExportFormat)configXstream.fromXML(formatConfigString);
} else {
formatConfig = new ExportFormat(true, true, true, true, true);
}
} catch (Exception e) {
log.error("could not establish object from xml", e);
formatConfig = new ExportFormat(true, true, true, true, true);
}
}
return formatConfig;
}
public static void updateExportFormat(UserRequest ureq, boolean responsecols, boolean poscol, boolean pointcol, boolean timecols, boolean commentcol) {
// save new config in GUI prefs
Preferences guiPrefs = ureq.getUserSession().getGuiPreferences();
if (guiPrefs != null) {
ExportFormat formatConfig = new ExportFormat(responsecols, poscol, pointcol, timecols, commentcol);
try {
String formatConfigString = configXstream.toXML(formatConfig);
guiPrefs.putAndSave(ExportOptionsController.class, QTI_EXPORT_ITEM_FORMAT_CONFIG, formatConfigString);
} catch (Exception e) {
log.error("",e);
}
}
}
}
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