private void prepareSickNoteList(Person person, int year, Model model) {

    List<SickNote> sickNotes =
        sickNoteService.getByPersonAndPeriod(
            person, DateUtil.getFirstDayOfYear(year), DateUtil.getLastDayOfYear(year));

    List<ExtendedSickNote> extendedSickNotes =
        FluentIterable.from(sickNotes)
            .transform(input -> new ExtendedSickNote(input, calendarService))
            .toSortedList(
                (o1, o2) -> {
                  // show latest sick notes at first
                  return o2.getStartDate().compareTo(o1.getStartDate());
                });

    BigDecimal sickDays = BigDecimal.ZERO;
    BigDecimal sickDaysWithAUB = BigDecimal.ZERO;
    BigDecimal childSickDays = BigDecimal.ZERO;
    BigDecimal childSickDaysWithAUB = BigDecimal.ZERO;

    for (SickNote sickNote : sickNotes) {
      if (!sickNote.isActive()) {
        continue;
      }

      if (sickNote.getType().equals(SickNoteType.SICK_NOTE_CHILD)) {
        childSickDays =
            childSickDays.add(
                calendarService.getWorkDays(
                    DayLength.FULL, sickNote.getStartDate(), sickNote.getEndDate(), person));

        if (sickNote.isAubPresent()) {
          BigDecimal workDays =
              calendarService.getWorkDays(
                  DayLength.FULL, sickNote.getAubStartDate(), sickNote.getAubEndDate(), person);
          childSickDaysWithAUB = childSickDaysWithAUB.add(workDays);
        }
      } else {
        sickDays =
            sickDays.add(
                calendarService.getWorkDays(
                    DayLength.FULL, sickNote.getStartDate(), sickNote.getEndDate(), person));

        if (sickNote.isAubPresent()) {
          BigDecimal workDays =
              calendarService.getWorkDays(
                  DayLength.FULL, sickNote.getAubStartDate(), sickNote.getAubEndDate(), person);
          sickDaysWithAUB = sickDaysWithAUB.add(workDays);
        }
      }
    }

    model.addAttribute("sickDays", sickDays);
    model.addAttribute("sickDaysWithAUB", sickDaysWithAUB);
    model.addAttribute("childSickDays", childSickDays);
    model.addAttribute("childSickDaysWithAUB", childSickDaysWithAUB);
    model.addAttribute("sickNotes", extendedSickNotes);
  }
  @PreAuthorize(SecurityRules.IS_OFFICE)
  @RequestMapping(value = "/sicknote", method = RequestMethod.GET)
  public String periodsSickNotes(
      @RequestParam(value = "from", required = false) String from,
      @RequestParam(value = "to", required = false) String to,
      Model model) {

    FilterPeriod period = new FilterPeriod(Optional.ofNullable(from), Optional.ofNullable(to));

    List<SickNote> sickNoteList =
        sickNoteService.getByPeriod(period.getStartDate(), period.getEndDate());

    fillModel(model, sickNoteList, period);

    return "sicknote/sick_notes";
  }