/**
     * Gets called when confirming a booking to add it to the DB.
     */
    @PostMapping("/roomBookingConfirmation")
    fun roomBookingConfirmation(model: Model, @ModelAttribute roomBookingRequest: RoomBookingRequest): String {

        makeBooking(roomBookingRequest)

        val date = roomBookingRequest.datetimeFrom
        val start = roomBookingRequest.datetimeFrom.minusDays(date.dayOfWeek.value.toLong())
        val end = roomBookingRequest.datetimeFrom.plusDays(7 - date.dayOfWeek.value.toLong())

        model.addAttribute("eventAppointmentSearchRequest", EventAppointmentSearchRequest(
                startDateTime = start,
                endDateTime = end,
                rooms = listOf(roomRepository.findByRoomName(roomBookingRequest.roomNr))
        ))
        return "roomBookingConfirmation"
    }

/**
     * Displays the appointments in the calendar view according to the request
     */
    @PostMapping("/calendarView")
    fun calendarView(model: Model, @ModelAttribute eventAppointmentSearchRequest: EventAppointmentSearchRequest): String {
        // THIS THROWS THE EXCEPTION: java.lang.IllegalArgumentException: Parameter specified as non-null is null: method ...requests.EventAppointmentSearchRequest.<init>, parameter startDateTime
        ...
    }

<!-- /*@thymesVar id="eventAppointmentSearchRequest" type="de.tudarmstadt.pvw.tulpe.soonToBeArtifactory.requests.EventAppointmentSearchRequest"*/ -->
    <form th:action="@{/calendarView}" method="post" th:object="${eventAppointmentSearchRequest}" id="forwardToCalendar" style="grid-column: span 4">
        <H1 th:text="#{roomBooking.bookingConfirmed}">
            Booking confirmed.
        </H1>
        <div class="links">
            <a href="#" th:text="#{roomBooking.nowRedirecting}" onclick="forwardToCalendar()">Redirecting to
                calendarView in </a> <b id="secondsLeft">7</b>
            <input type="hidden" th:field="${eventAppointmentSearchRequest.startDateTime}" th:name="startDateTime" th:value="${eventAppointmentSearchRequest.startDateTime}">
            <input type="hidden" th:field="${eventAppointmentSearchRequest.endDateTime}" th:name="endDateTime" th:value="${eventAppointmentSearchRequest.endDateTime}">
            <input type="hidden" th:field="${eventAppointmentSearchRequest.rooms}" name="rooms[]" th:each="room: ${eventAppointmentSearchRequest.rooms}" th:value="${room.RoomId}">
        </div>
        ...
    </form>