no-jira: delete big blue button with groups

src/main/java/org/olat/modules/bigbluebutton/manager/BigBlueButtonManagerImpl.java

@@ -55,6 +55,7 @@ import org.olat.course.CourseFactory;
 import org.olat.course.ICourse;
 import org.olat.group.BusinessGroup;
 import org.olat.group.BusinessGroupService;
+import org.olat.group.DeletableGroupData;
 import org.olat.modules.bigbluebutton.BigBlueButtonManager;
 import org.olat.modules.bigbluebutton.BigBlueButtonMeeting;
 import org.olat.modules.bigbluebutton.BigBlueButtonMeetingTemplate;
@@ -85,7 +86,7 @@ import org.w3c.dom.Document;
  *
  */
 @Service
-public class BigBlueButtonManagerImpl implements BigBlueButtonManager, InitializingBean {
+public class BigBlueButtonManagerImpl implements BigBlueButtonManager, DeletableGroupData, InitializingBean {
 	
 	private static final Logger log = Tracing.createLoggerFor(BigBlueButtonManagerImpl.class);
 
@@ -215,6 +216,16 @@ public class BigBlueButtonManagerImpl implements BigBlueButtonManager, Initializ
 		bigBlueButtonMeetingTemplateDao.updateTemplate(template);
 	}
 
+	@Override
+	public boolean deleteGroupDataFor(BusinessGroup group) {
+		List<BigBlueButtonMeeting> meetings = bigBlueButtonMeetingDao.getMeetings(null, null, group);
+		BigBlueButtonErrors errors = new BigBlueButtonErrors();
+		for(BigBlueButtonMeeting meeting:meetings) {
+			deleteMeeting(meeting, errors);
+		}
+		return !errors.hasErrors();
+	}
+
 	@Override
 	public BigBlueButtonServer createServer(String url, String recordingUrl, String sharedSecret) {
 		return bigBlueButtonServerDao.createServer(url, recordingUrl, sharedSecret);