Opening and closing time function

Hello team Good day 😊
Please am currently building an app that required opening and closing time function from everyday in flutterflow and I have actually made some code but is not working as I expected because it's taking the date and time instead of time only and that made the custom code not to work as I expected... Here's the code below ⬇⬇⬇
Please I need some help with this please

import 'dart:convert';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/flutter_flow/custom_functions.dart';
import '/backend/backend.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import '/backend/schema/structs/index.dart';
import '/auth/firebase_auth/auth_util.dart';

bool? openingTimeClosingTime(
  DateTime? monOpen,
  DateTime? monClose,
  DateTime? turOpen,
  DateTime? turClose,
  DateTime? wenOpen,
  DateTime? wenClose,
  DateTime? thurOpen,
  DateTime? thurClose,
  DateTime? fryOpen,
  DateTime? fryClose,
  DateTime? sarOpen,
  DateTime? sarClose,
  DateTime? sunOpen,
  DateTime? sunClose,
) {
  /// MODIFY CODE ONLY BELOW THIS LINE

  // If opening time is within the closing time return true. In everyday Like 8 am to 10pm
  DateTime now = DateTime.now();
  int dayOfWeek = now.weekday;

  switch (dayOfWeek) {
    case 1:
      return monOpen != null &&
          monClose != null &&
          now.isAfter(monOpen) &&
          now.isBefore(monClose);
    case 2:
      return turOpen != null &&
          turClose != null &&
          now.isAfter(turOpen) &&
          now.isBefore(turClose);
    case 3:
      return wenOpen != null &&
          wenClose != null &&
          now.isAfter(wenOpen) &&
          now.isBefore(wenClose);
    case 4:
      return thurOpen != null &&
          thurClose != null &&
          now.isAfter(thurOpen) &&
          now.isBefore(thurClose);
    case 5:
      return fryOpen != null &&
          fryClose != null &&
          now.isAfter(fryOpen) &&
          now.isBefore(fryClose);
    case 6:
      return sarOpen != null &&
          sarClose != null &&
          now.isAfter(sarOpen) &&
          now.isBefore(sarClose);
    case 7:
      return sunOpen != null &&
          sunClose != null &&
          now.isAfter(sunOpen) &&
          now.isBefore(sunClose);
    default:
      return false;
  }

  /// MODIFY CODE ONLY ABOVE THIS LINE
}