@Override
  public List<KalendarRenderWrapper> getListOfCalendarWrappers(
      UserRequest ureq, WindowControl wControl) {
    if (!calendarModule.isEnabled()) {
      return new ArrayList<KalendarRenderWrapper>();
    }

    Identity identity = ureq.getIdentity();

    List<KalendarRenderWrapper> calendars = new ArrayList<KalendarRenderWrapper>();
    Map<CalendarKey, CalendarUserConfiguration> configMap =
        calendarManager.getCalendarUserConfigurationsMap(ureq.getIdentity());
    appendPersonalCalendar(identity, calendars, configMap);
    appendGroupCalendars(identity, calendars, configMap);
    appendCourseCalendars(ureq, wControl, calendars, configMap);

    // reload every hour
    List<KalendarRenderWrapper> importedCalendars =
        importCalendarManager.getImportedCalendarsForIdentity(identity, true);
    for (KalendarRenderWrapper importedCalendar : importedCalendars) {
      importedCalendar.setPrivateEventsVisible(true);
    }

    calendars.addAll(importedCalendars);
    return calendars;
  }
  @Override
  public List<CalendarFileInfos> getListOfCalendarsFiles(Identity identity) {
    List<CalendarFileInfos> aggregatedFiles = new ArrayList<>();

    Map<CalendarKey, CalendarUserConfiguration> configMap =
        calendarManager.getCalendarUserConfigurationsMap(identity);

    // personal calendar
    CalendarKey personalCalendarKey =
        new CalendarKey(identity.getName(), CalendarManager.TYPE_USER);
    CalendarUserConfiguration personalCalendarConfig = configMap.get(personalCalendarKey);
    if (calendarModule.isEnablePersonalCalendar()
        && (personalCalendarConfig == null || personalCalendarConfig.isInAggregatedFeed())) {
      File iCalFile =
          calendarManager.getCalendarICalFile(CalendarManager.TYPE_USER, identity.getName());
      if (iCalFile != null) {
        aggregatedFiles.add(
            new CalendarFileInfos(identity.getName(), CalendarManager.TYPE_USER, iCalFile));
      }

      // reload every hour
      List<CalendarFileInfos> importedCalendars =
          importCalendarManager.getImportedCalendarInfosForIdentity(identity, true);
      aggregatedFiles.addAll(importedCalendars);
    }

    // group calendars
    if (calendarModule.isEnableGroupCalendar()) {
      SearchBusinessGroupParams groupParams = new SearchBusinessGroupParams(identity, true, true);
      groupParams.addTools(CollaborationTools.TOOL_CALENDAR);
      List<BusinessGroup> groups =
          businessGroupService.findBusinessGroups(groupParams, null, 0, -1);
      for (BusinessGroup group : groups) {
        String calendarId = group.getKey().toString();
        CalendarKey key = new CalendarKey(calendarId, CalendarManager.TYPE_GROUP);
        CalendarUserConfiguration calendarConfig = configMap.get(key);
        if (calendarConfig == null || calendarConfig.isInAggregatedFeed()) {
          File iCalFile =
              calendarManager.getCalendarICalFile(CalendarManager.TYPE_GROUP, calendarId);
          if (iCalFile != null) {
            aggregatedFiles.add(
                new CalendarFileInfos(calendarId, CalendarManager.TYPE_GROUP, iCalFile));
          }
        }
      }
    }

    if (calendarModule.isEnableCourseElementCalendar()
        || calendarModule.isEnableCourseToolCalendar()) {
      List<Object[]> resources = getCourses(identity);
      for (Object[] resource : resources) {
        RepositoryEntry courseEntry = (RepositoryEntry) resource[0];
        String calendarId = courseEntry.getOlatResource().getResourceableId().toString();
        CalendarKey key = new CalendarKey(calendarId, CalendarManager.TYPE_COURSE);
        CalendarUserConfiguration calendarConfig = configMap.get(key);
        if (calendarConfig == null || calendarConfig.isInAggregatedFeed()) {
          File iCalFile =
              calendarManager.getCalendarICalFile(CalendarManager.TYPE_COURSE, calendarId);
          if (iCalFile != null) {
            aggregatedFiles.add(
                new CalendarFileInfos(calendarId, CalendarManager.TYPE_COURSE, iCalFile));
          }
        }
      }
    }

    return aggregatedFiles;
  }